[PATCH net-next mlxsw 0/3] selftests: forwarding: Updates to sysctl handling
by Petr Machata
Some selftests need to adjust sysctl settings. In order to be neutral to
the system that the test is run on, it is a good practice to change back
to the original setting after the test ends. That involves some
boilerplate that can be abstracted away.
In patch #1, introduce two functions, sysctl_set() and sysctl_restore().
The former stores the current value of a given setting, and sets a new
value. The latter restores the setting to the previously-stored value.
In patch #2, use these wrappers in a number of tests.
Additionally in patch #3, fix a problem in mirror_gre_nh.sh, which
neglected to set a sysctl that's crucial for the test to work.
Petr Machata (3):
selftests: forwarding: lib: Add sysctl_set(), sysctl_restore()
selftests: forwarding: Use sysctl_set(), sysctl_restore()
selftests: forwarding: mirror_gre_nh: Unset RP filter
tools/testing/selftests/net/forwarding/lib.sh | 28 ++++++++++++++++------
.../selftests/net/forwarding/mirror_gre_changes.sh | 7 ++----
.../selftests/net/forwarding/mirror_gre_nh.sh | 6 +++++
.../selftests/net/forwarding/router_multipath.sh | 12 ++++------
4 files changed, 33 insertions(+), 20 deletions(-)
--
2.4.11
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7 years
- 2
- 4
[PATCH 0/7] Kselftest framework SKIP handling
by Shuah Khan (Samsung OSG)
Kselftest framework currently treats all non-zero return codes from tests
as failures. When tests are skipped with non-zero return code, because of
unmet dependencies and/or unsupported configuration, it reports them as
failed. This will lead to too many false negatives even on the tests that
couldn't be run.
This patch series fixes the problem by adding SKIP handling:
The common RUN_TESTS and EMIT_TESTS functions are changed to test for
SKIP=4 return from tests. This change enables the framework and tests
that return SKIP=4 will report SKIP, other continue to report FAIL/PASS.
KSFT_SKIP has been changed to report Skip code of 4 instead of KSFT_PASS
to clearly differentiate the skipped tests.
I am working on Test changes to report SKIP instead FAIL/PASS when they get
skipped. I will be sending them out later this week.
In addition, I made changes to improve the reporting and cleaned up both
RUN_TESTS and EMIT_TESTS define to remove duplicate test output strings.
Shuah Khan (Samsung OSG) (7):
selftests: lib.mk: cleanup RUN_TESTS define and make it readable
selftests: lib.mk: add SKIP handling to RUN_TESTS define
selftests: lib.mk: move running and printing result to a new function
selftests: lib.mk: Include test suite name in the RUN_TESTS output
selftests: lib.mk: add SKIP handling and test suite name to EMIT_TESTS
selftests: lib.mk: add test execute bit check to EMIT_TESTS
selftests: kselftest: change KSFT_SKIP=4 instead of KSFT_PASS
tools/testing/selftests/Makefile | 3 +-
tools/testing/selftests/kselftest.h | 2 +-
tools/testing/selftests/lib.mk | 55 +++++++++++++++++++++++++++----------
3 files changed, 44 insertions(+), 16 deletions(-)
--
2.14.1
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7 years
- 1
- 7
[PATCH 14/14] rseq: selftests: Provide Makefile, scripts, gitignore (v2)
by Mathieu Desnoyers
A run_param_test.sh script runs many variants of the parametrizable
tests.
Wire up the rseq Makefile, add directory entry into MAINTAINERS file.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
Changes since v1:
- Use only rseq, remove use of cpu_opv.
---
MAINTAINERS | 1 +
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/rseq/.gitignore | 6 ++
tools/testing/selftests/rseq/Makefile | 30 ++++++
tools/testing/selftests/rseq/run_param_test.sh | 121 +++++++++++++++++++++++++
5 files changed, 159 insertions(+)
create mode 100644 tools/testing/selftests/rseq/.gitignore
create mode 100644 tools/testing/selftests/rseq/Makefile
create mode 100755 tools/testing/selftests/rseq/run_param_test.sh
diff --git a/MAINTAINERS b/MAINTAINERS
index 4d61ce154dfc..5e8968b3ccae 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11991,6 +11991,7 @@ S: Supported
F: kernel/rseq.c
F: include/uapi/linux/rseq.h
F: include/trace/events/rseq.h
+F: tools/testing/selftests/rseq/
RFKILL
M: Johannes Berg <johannes(a)sipsolutions.net>
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 32aafa92074c..593fb44c9cd4 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -28,6 +28,7 @@ TARGETS += powerpc
TARGETS += proc
TARGETS += pstore
TARGETS += ptrace
+TARGETS += rseq
TARGETS += seccomp
TARGETS += sigaltstack
TARGETS += size
diff --git a/tools/testing/selftests/rseq/.gitignore b/tools/testing/selftests/rseq/.gitignore
new file mode 100644
index 000000000000..cc610da7e369
--- /dev/null
+++ b/tools/testing/selftests/rseq/.gitignore
@@ -0,0 +1,6 @@
+basic_percpu_ops_test
+basic_test
+basic_rseq_op_test
+param_test
+param_test_benchmark
+param_test_compare_twice
diff --git a/tools/testing/selftests/rseq/Makefile b/tools/testing/selftests/rseq/Makefile
new file mode 100644
index 000000000000..c30c52e1d0d2
--- /dev/null
+++ b/tools/testing/selftests/rseq/Makefile
@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0+ OR MIT
+CFLAGS += -O2 -Wall -g -I./ -I../../../../usr/include/ -L./ -Wl,-rpath=./
+LDLIBS += -lpthread
+
+# Own dependencies because we only want to build against 1st prerequisite, but
+# still track changes to header files and depend on shared object.
+OVERRIDE_TARGETS = 1
+
+TEST_GEN_PROGS = basic_test basic_percpu_ops_test param_test \
+ param_test_benchmark param_test_compare_twice
+
+TEST_GEN_PROGS_EXTENDED = librseq.so
+
+TEST_PROGS = run_param_test.sh
+
+include ../lib.mk
+
+$(OUTPUT)/librseq.so: rseq.c rseq.h rseq-*.h
+ $(CC) $(CFLAGS) -shared -fPIC $< $(LDLIBS) -o $@
+
+$(OUTPUT)/%: %.c $(TEST_GEN_PROGS_EXTENDED) rseq.h rseq-*.h
+ $(CC) $(CFLAGS) $< $(LDLIBS) -lrseq -o $@
+
+$(OUTPUT)/param_test_benchmark: param_test.c $(TEST_GEN_PROGS_EXTENDED) \
+ rseq.h rseq-*.h
+ $(CC) $(CFLAGS) -DBENCHMARK $< $(LDLIBS) -lrseq -o $@
+
+$(OUTPUT)/param_test_compare_twice: param_test.c $(TEST_GEN_PROGS_EXTENDED) \
+ rseq.h rseq-*.h
+ $(CC) $(CFLAGS) -DRSEQ_COMPARE_TWICE $< $(LDLIBS) -lrseq -o $@
diff --git a/tools/testing/selftests/rseq/run_param_test.sh b/tools/testing/selftests/rseq/run_param_test.sh
new file mode 100755
index 000000000000..3acd6d75ff9f
--- /dev/null
+++ b/tools/testing/selftests/rseq/run_param_test.sh
@@ -0,0 +1,121 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+ or MIT
+
+EXTRA_ARGS=${@}
+
+OLDIFS="$IFS"
+IFS=$'\n'
+TEST_LIST=(
+ "-T s"
+ "-T l"
+ "-T b"
+ "-T b -M"
+ "-T m"
+ "-T m -M"
+ "-T i"
+)
+
+TEST_NAME=(
+ "spinlock"
+ "list"
+ "buffer"
+ "buffer with barrier"
+ "memcpy"
+ "memcpy with barrier"
+ "increment"
+)
+IFS="$OLDIFS"
+
+REPS=1000
+SLOW_REPS=100
+
+function do_tests()
+{
+ local i=0
+ while [ "$i" -lt "${#TEST_LIST[@]}" ]; do
+ echo "Running test ${TEST_NAME[$i]}"
+ ./param_test ${TEST_LIST[$i]} -r ${REPS} ${@} ${EXTRA_ARGS} || exit 1
+ echo "Running compare-twice test ${TEST_NAME[$i]}"
+ ./param_test_compare_twice ${TEST_LIST[$i]} -r ${REPS} ${@} ${EXTRA_ARGS} || exit 1
+ let "i++"
+ done
+}
+
+echo "Default parameters"
+do_tests
+
+echo "Loop injection: 10000 loops"
+
+OLDIFS="$IFS"
+IFS=$'\n'
+INJECT_LIST=(
+ "1"
+ "2"
+ "3"
+ "4"
+ "5"
+ "6"
+ "7"
+ "8"
+ "9"
+)
+IFS="$OLDIFS"
+
+NR_LOOPS=10000
+
+i=0
+while [ "$i" -lt "${#INJECT_LIST[@]}" ]; do
+ echo "Injecting at <${INJECT_LIST[$i]}>"
+ do_tests -${INJECT_LIST[i]} ${NR_LOOPS}
+ let "i++"
+done
+NR_LOOPS=
+
+function inject_blocking()
+{
+ OLDIFS="$IFS"
+ IFS=$'\n'
+ INJECT_LIST=(
+ "7"
+ "8"
+ "9"
+ )
+ IFS="$OLDIFS"
+
+ NR_LOOPS=-1
+
+ i=0
+ while [ "$i" -lt "${#INJECT_LIST[@]}" ]; do
+ echo "Injecting at <${INJECT_LIST[$i]}>"
+ do_tests -${INJECT_LIST[i]} -1 ${@}
+ let "i++"
+ done
+ NR_LOOPS=
+}
+
+echo "Yield injection (25%)"
+inject_blocking -m 4 -y
+
+echo "Yield injection (50%)"
+inject_blocking -m 2 -y
+
+echo "Yield injection (100%)"
+inject_blocking -m 1 -y
+
+echo "Kill injection (25%)"
+inject_blocking -m 4 -k
+
+echo "Kill injection (50%)"
+inject_blocking -m 2 -k
+
+echo "Kill injection (100%)"
+inject_blocking -m 1 -k
+
+echo "Sleep injection (1ms, 25%)"
+inject_blocking -m 4 -s 1
+
+echo "Sleep injection (1ms, 50%)"
+inject_blocking -m 2 -s 1
+
+echo "Sleep injection (1ms, 100%)"
+inject_blocking -m 1 -s 1
--
2.11.0
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7 years
- 1
- 0
[PATCH 13/14] rseq: selftests: Provide parametrized tests (v2)
by Mathieu Desnoyers
"param_test" is a parametrizable restartable sequences test. See
the "--help" output for usage.
"param_test_benchmark" is the same as "param_test", but it removes
testing book-keeping code to allow accurate benchmarks.
"param_test_compare_twice" is the same as "param_test", but it performs
each comparison within rseq critical section twice, thus validating
invariants. If any of the second comparisons fails, an error message
is printed and the test aborts.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
Changes since v1:
- Use only rseq, remove use of cpu_opv.
---
tools/testing/selftests/rseq/param_test.c | 1260 +++++++++++++++++++++++++++++
1 file changed, 1260 insertions(+)
create mode 100644 tools/testing/selftests/rseq/param_test.c
diff --git a/tools/testing/selftests/rseq/param_test.c b/tools/testing/selftests/rseq/param_test.c
new file mode 100644
index 000000000000..6a9f602a8718
--- /dev/null
+++ b/tools/testing/selftests/rseq/param_test.c
@@ -0,0 +1,1260 @@
+// SPDX-License-Identifier: LGPL-2.1
+#define _GNU_SOURCE
+#include <assert.h>
+#include <pthread.h>
+#include <sched.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syscall.h>
+#include <unistd.h>
+#include <poll.h>
+#include <sys/types.h>
+#include <signal.h>
+#include <errno.h>
+#include <stddef.h>
+
+static inline pid_t gettid(void)
+{
+ return syscall(__NR_gettid);
+}
+
+#define NR_INJECT 9
+static int loop_cnt[NR_INJECT + 1];
+
+static int loop_cnt_1 asm("asm_loop_cnt_1") __attribute__((used));
+static int loop_cnt_2 asm("asm_loop_cnt_2") __attribute__((used));
+static int loop_cnt_3 asm("asm_loop_cnt_3") __attribute__((used));
+static int loop_cnt_4 asm("asm_loop_cnt_4") __attribute__((used));
+static int loop_cnt_5 asm("asm_loop_cnt_5") __attribute__((used));
+static int loop_cnt_6 asm("asm_loop_cnt_6") __attribute__((used));
+
+static int opt_modulo, verbose;
+
+static int opt_yield, opt_signal, opt_sleep,
+ opt_disable_rseq, opt_threads = 200,
+ opt_disable_mod = 0, opt_test = 's', opt_mb = 0;
+
+#ifndef RSEQ_SKIP_FASTPATH
+static long long opt_reps = 5000;
+#else
+static long long opt_reps = 100;
+#endif
+
+static __thread __attribute__((tls_model("initial-exec")))
+unsigned int signals_delivered;
+
+#ifndef BENCHMARK
+
+static __thread __attribute__((tls_model("initial-exec"), unused))
+unsigned int yield_mod_cnt, nr_abort;
+
+#define printf_verbose(fmt, ...) \
+ do { \
+ if (verbose) \
+ printf(fmt, ## __VA_ARGS__); \
+ } while (0)
+
+#if defined(__x86_64__) || defined(__i386__)
+
+#define INJECT_ASM_REG "eax"
+
+#define RSEQ_INJECT_CLOBBER \
+ , INJECT_ASM_REG
+
+#ifdef __i386__
+
+#define RSEQ_INJECT_ASM(n) \
+ "mov asm_loop_cnt_" #n ", %%" INJECT_ASM_REG "\n\t" \
+ "test %%" INJECT_ASM_REG ",%%" INJECT_ASM_REG "\n\t" \
+ "jz 333f\n\t" \
+ "222:\n\t" \
+ "dec %%" INJECT_ASM_REG "\n\t" \
+ "jnz 222b\n\t" \
+ "333:\n\t"
+
+#elif defined(__x86_64__)
+
+#define RSEQ_INJECT_ASM(n) \
+ "lea asm_loop_cnt_" #n "(%%rip), %%" INJECT_ASM_REG "\n\t" \
+ "mov (%%" INJECT_ASM_REG "), %%" INJECT_ASM_REG "\n\t" \
+ "test %%" INJECT_ASM_REG ",%%" INJECT_ASM_REG "\n\t" \
+ "jz 333f\n\t" \
+ "222:\n\t" \
+ "dec %%" INJECT_ASM_REG "\n\t" \
+ "jnz 222b\n\t" \
+ "333:\n\t"
+
+#else
+#error "Unsupported architecture"
+#endif
+
+#elif defined(__ARMEL__)
+
+#define RSEQ_INJECT_INPUT \
+ , [loop_cnt_1]"m"(loop_cnt[1]) \
+ , [loop_cnt_2]"m"(loop_cnt[2]) \
+ , [loop_cnt_3]"m"(loop_cnt[3]) \
+ , [loop_cnt_4]"m"(loop_cnt[4]) \
+ , [loop_cnt_5]"m"(loop_cnt[5]) \
+ , [loop_cnt_6]"m"(loop_cnt[6])
+
+#define INJECT_ASM_REG "r4"
+
+#define RSEQ_INJECT_CLOBBER \
+ , INJECT_ASM_REG
+
+#define RSEQ_INJECT_ASM(n) \
+ "ldr " INJECT_ASM_REG ", %[loop_cnt_" #n "]\n\t" \
+ "cmp " INJECT_ASM_REG ", #0\n\t" \
+ "beq 333f\n\t" \
+ "222:\n\t" \
+ "subs " INJECT_ASM_REG ", #1\n\t" \
+ "bne 222b\n\t" \
+ "333:\n\t"
+
+#elif __PPC__
+
+#define RSEQ_INJECT_INPUT \
+ , [loop_cnt_1]"m"(loop_cnt[1]) \
+ , [loop_cnt_2]"m"(loop_cnt[2]) \
+ , [loop_cnt_3]"m"(loop_cnt[3]) \
+ , [loop_cnt_4]"m"(loop_cnt[4]) \
+ , [loop_cnt_5]"m"(loop_cnt[5]) \
+ , [loop_cnt_6]"m"(loop_cnt[6])
+
+#define INJECT_ASM_REG "r18"
+
+#define RSEQ_INJECT_CLOBBER \
+ , INJECT_ASM_REG
+
+#define RSEQ_INJECT_ASM(n) \
+ "lwz %%" INJECT_ASM_REG ", %[loop_cnt_" #n "]\n\t" \
+ "cmpwi %%" INJECT_ASM_REG ", 0\n\t" \
+ "beq 333f\n\t" \
+ "222:\n\t" \
+ "subic. %%" INJECT_ASM_REG ", %%" INJECT_ASM_REG ", 1\n\t" \
+ "bne 222b\n\t" \
+ "333:\n\t"
+#else
+#error unsupported target
+#endif
+
+#define RSEQ_INJECT_FAILED \
+ nr_abort++;
+
+#define RSEQ_INJECT_C(n) \
+{ \
+ int loc_i, loc_nr_loops = loop_cnt[n]; \
+ \
+ for (loc_i = 0; loc_i < loc_nr_loops; loc_i++) { \
+ rseq_barrier(); \
+ } \
+ if (loc_nr_loops == -1 && opt_modulo) { \
+ if (yield_mod_cnt == opt_modulo - 1) { \
+ if (opt_sleep > 0) \
+ poll(NULL, 0, opt_sleep); \
+ if (opt_yield) \
+ sched_yield(); \
+ if (opt_signal) \
+ raise(SIGUSR1); \
+ yield_mod_cnt = 0; \
+ } else { \
+ yield_mod_cnt++; \
+ } \
+ } \
+}
+
+#else
+
+#define printf_verbose(fmt, ...)
+
+#endif /* BENCHMARK */
+
+#include "rseq.h"
+
+struct percpu_lock_entry {
+ intptr_t v;
+} __attribute__((aligned(128)));
+
+struct percpu_lock {
+ struct percpu_lock_entry c[CPU_SETSIZE];
+};
+
+struct test_data_entry {
+ intptr_t count;
+} __attribute__((aligned(128)));
+
+struct spinlock_test_data {
+ struct percpu_lock lock;
+ struct test_data_entry c[CPU_SETSIZE];
+};
+
+struct spinlock_thread_test_data {
+ struct spinlock_test_data *data;
+ long long reps;
+ int reg;
+};
+
+struct inc_test_data {
+ struct test_data_entry c[CPU_SETSIZE];
+};
+
+struct inc_thread_test_data {
+ struct inc_test_data *data;
+ long long reps;
+ int reg;
+};
+
+struct percpu_list_node {
+ intptr_t data;
+ struct percpu_list_node *next;
+};
+
+struct percpu_list_entry {
+ struct percpu_list_node *head;
+} __attribute__((aligned(128)));
+
+struct percpu_list {
+ struct percpu_list_entry c[CPU_SETSIZE];
+};
+
+#define BUFFER_ITEM_PER_CPU 100
+
+struct percpu_buffer_node {
+ intptr_t data;
+};
+
+struct percpu_buffer_entry {
+ intptr_t offset;
+ intptr_t buflen;
+ struct percpu_buffer_node **array;
+} __attribute__((aligned(128)));
+
+struct percpu_buffer {
+ struct percpu_buffer_entry c[CPU_SETSIZE];
+};
+
+#define MEMCPY_BUFFER_ITEM_PER_CPU 100
+
+struct percpu_memcpy_buffer_node {
+ intptr_t data1;
+ uint64_t data2;
+};
+
+struct percpu_memcpy_buffer_entry {
+ intptr_t offset;
+ intptr_t buflen;
+ struct percpu_memcpy_buffer_node *array;
+} __attribute__((aligned(128)));
+
+struct percpu_memcpy_buffer {
+ struct percpu_memcpy_buffer_entry c[CPU_SETSIZE];
+};
+
+/* A simple percpu spinlock. Grabs lock on current cpu. */
+static int rseq_this_cpu_lock(struct percpu_lock *lock)
+{
+ int cpu;
+
+ for (;;) {
+ int ret;
+
+ cpu = rseq_cpu_start();
+ ret = rseq_cmpeqv_storev(&lock->c[cpu].v,
+ 0, 1, cpu);
+ if (rseq_likely(!ret))
+ break;
+ /* Retry if comparison fails or rseq aborts. */
+ }
+ /*
+ * Acquire semantic when taking lock after control dependency.
+ * Matches rseq_smp_store_release().
+ */
+ rseq_smp_acquire__after_ctrl_dep();
+ return cpu;
+}
+
+static void rseq_percpu_unlock(struct percpu_lock *lock, int cpu)
+{
+ assert(lock->c[cpu].v == 1);
+ /*
+ * Release lock, with release semantic. Matches
+ * rseq_smp_acquire__after_ctrl_dep().
+ */
+ rseq_smp_store_release(&lock->c[cpu].v, 0);
+}
+
+void *test_percpu_spinlock_thread(void *arg)
+{
+ struct spinlock_thread_test_data *thread_data = arg;
+ struct spinlock_test_data *data = thread_data->data;
+ long long i, reps;
+
+ if (!opt_disable_rseq && thread_data->reg &&
+ rseq_register_current_thread())
+ abort();
+ reps = thread_data->reps;
+ for (i = 0; i < reps; i++) {
+ int cpu = rseq_cpu_start();
+
+ cpu = rseq_this_cpu_lock(&data->lock);
+ data->c[cpu].count++;
+ rseq_percpu_unlock(&data->lock, cpu);
+#ifndef BENCHMARK
+ if (i != 0 && !(i % (reps / 10)))
+ printf_verbose("tid %d: count %lld\n", (int) gettid(), i);
+#endif
+ }
+ printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
+ (int) gettid(), nr_abort, signals_delivered);
+ if (!opt_disable_rseq && thread_data->reg &&
+ rseq_unregister_current_thread())
+ abort();
+ return NULL;
+}
+
+/*
+ * A simple test which implements a sharded counter using a per-cpu
+ * lock. Obviously real applications might prefer to simply use a
+ * per-cpu increment; however, this is reasonable for a test and the
+ * lock can be extended to synchronize more complicated operations.
+ */
+void test_percpu_spinlock(void)
+{
+ const int num_threads = opt_threads;
+ int i, ret;
+ uint64_t sum;
+ pthread_t test_threads[num_threads];
+ struct spinlock_test_data data;
+ struct spinlock_thread_test_data thread_data[num_threads];
+
+ memset(&data, 0, sizeof(data));
+ for (i = 0; i < num_threads; i++) {
+ thread_data[i].reps = opt_reps;
+ if (opt_disable_mod <= 0 || (i % opt_disable_mod))
+ thread_data[i].reg = 1;
+ else
+ thread_data[i].reg = 0;
+ thread_data[i].data = &data;
+ ret = pthread_create(&test_threads[i], NULL,
+ test_percpu_spinlock_thread,
+ &thread_data[i]);
+ if (ret) {
+ errno = ret;
+ perror("pthread_create");
+ abort();
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_join(test_threads[i], NULL);
+ if (ret) {
+ errno = ret;
+ perror("pthread_join");
+ abort();
+ }
+ }
+
+ sum = 0;
+ for (i = 0; i < CPU_SETSIZE; i++)
+ sum += data.c[i].count;
+
+ assert(sum == (uint64_t)opt_reps * num_threads);
+}
+
+void *test_percpu_inc_thread(void *arg)
+{
+ struct inc_thread_test_data *thread_data = arg;
+ struct inc_test_data *data = thread_data->data;
+ long long i, reps;
+
+ if (!opt_disable_rseq && thread_data->reg &&
+ rseq_register_current_thread())
+ abort();
+ reps = thread_data->reps;
+ for (i = 0; i < reps; i++) {
+ int ret;
+
+ do {
+ int cpu;
+
+ cpu = rseq_cpu_start();
+ ret = rseq_addv(&data->c[cpu].count, 1, cpu);
+ } while (rseq_unlikely(ret));
+#ifndef BENCHMARK
+ if (i != 0 && !(i % (reps / 10)))
+ printf_verbose("tid %d: count %lld\n", (int) gettid(), i);
+#endif
+ }
+ printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
+ (int) gettid(), nr_abort, signals_delivered);
+ if (!opt_disable_rseq && thread_data->reg &&
+ rseq_unregister_current_thread())
+ abort();
+ return NULL;
+}
+
+void test_percpu_inc(void)
+{
+ const int num_threads = opt_threads;
+ int i, ret;
+ uint64_t sum;
+ pthread_t test_threads[num_threads];
+ struct inc_test_data data;
+ struct inc_thread_test_data thread_data[num_threads];
+
+ memset(&data, 0, sizeof(data));
+ for (i = 0; i < num_threads; i++) {
+ thread_data[i].reps = opt_reps;
+ if (opt_disable_mod <= 0 || (i % opt_disable_mod))
+ thread_data[i].reg = 1;
+ else
+ thread_data[i].reg = 0;
+ thread_data[i].data = &data;
+ ret = pthread_create(&test_threads[i], NULL,
+ test_percpu_inc_thread,
+ &thread_data[i]);
+ if (ret) {
+ errno = ret;
+ perror("pthread_create");
+ abort();
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_join(test_threads[i], NULL);
+ if (ret) {
+ errno = ret;
+ perror("pthread_join");
+ abort();
+ }
+ }
+
+ sum = 0;
+ for (i = 0; i < CPU_SETSIZE; i++)
+ sum += data.c[i].count;
+
+ assert(sum == (uint64_t)opt_reps * num_threads);
+}
+
+void this_cpu_list_push(struct percpu_list *list,
+ struct percpu_list_node *node,
+ int *_cpu)
+{
+ int cpu;
+
+ for (;;) {
+ intptr_t *targetptr, newval, expect;
+ int ret;
+
+ cpu = rseq_cpu_start();
+ /* Load list->c[cpu].head with single-copy atomicity. */
+ expect = (intptr_t)RSEQ_READ_ONCE(list->c[cpu].head);
+ newval = (intptr_t)node;
+ targetptr = (intptr_t *)&list->c[cpu].head;
+ node->next = (struct percpu_list_node *)expect;
+ ret = rseq_cmpeqv_storev(targetptr, expect, newval, cpu);
+ if (rseq_likely(!ret))
+ break;
+ /* Retry if comparison fails or rseq aborts. */
+ }
+ if (_cpu)
+ *_cpu = cpu;
+}
+
+/*
+ * Unlike a traditional lock-less linked list; the availability of a
+ * rseq primitive allows us to implement pop without concerns over
+ * ABA-type races.
+ */
+struct percpu_list_node *this_cpu_list_pop(struct percpu_list *list,
+ int *_cpu)
+{
+ struct percpu_list_node *node = NULL;
+ int cpu;
+
+ for (;;) {
+ struct percpu_list_node *head;
+ intptr_t *targetptr, expectnot, *load;
+ off_t offset;
+ int ret;
+
+ cpu = rseq_cpu_start();
+ targetptr = (intptr_t *)&list->c[cpu].head;
+ expectnot = (intptr_t)NULL;
+ offset = offsetof(struct percpu_list_node, next);
+ load = (intptr_t *)&head;
+ ret = rseq_cmpnev_storeoffp_load(targetptr, expectnot,
+ offset, load, cpu);
+ if (rseq_likely(!ret)) {
+ node = head;
+ break;
+ }
+ if (ret > 0)
+ break;
+ /* Retry if rseq aborts. */
+ }
+ if (_cpu)
+ *_cpu = cpu;
+ return node;
+}
+
+/*
+ * __percpu_list_pop is not safe against concurrent accesses. Should
+ * only be used on lists that are not concurrently modified.
+ */
+struct percpu_list_node *__percpu_list_pop(struct percpu_list *list, int cpu)
+{
+ struct percpu_list_node *node;
+
+ node = list->c[cpu].head;
+ if (!node)
+ return NULL;
+ list->c[cpu].head = node->next;
+ return node;
+}
+
+void *test_percpu_list_thread(void *arg)
+{
+ long long i, reps;
+ struct percpu_list *list = (struct percpu_list *)arg;
+
+ if (!opt_disable_rseq && rseq_register_current_thread())
+ abort();
+
+ reps = opt_reps;
+ for (i = 0; i < reps; i++) {
+ struct percpu_list_node *node;
+
+ node = this_cpu_list_pop(list, NULL);
+ if (opt_yield)
+ sched_yield(); /* encourage shuffling */
+ if (node)
+ this_cpu_list_push(list, node, NULL);
+ }
+
+ printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
+ (int) gettid(), nr_abort, signals_delivered);
+ if (!opt_disable_rseq && rseq_unregister_current_thread())
+ abort();
+
+ return NULL;
+}
+
+/* Simultaneous modification to a per-cpu linked list from many threads. */
+void test_percpu_list(void)
+{
+ const int num_threads = opt_threads;
+ int i, j, ret;
+ uint64_t sum = 0, expected_sum = 0;
+ struct percpu_list list;
+ pthread_t test_threads[num_threads];
+ cpu_set_t allowed_cpus;
+
+ memset(&list, 0, sizeof(list));
+
+ /* Generate list entries for every usable cpu. */
+ sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+ for (j = 1; j <= 100; j++) {
+ struct percpu_list_node *node;
+
+ expected_sum += j;
+
+ node = malloc(sizeof(*node));
+ assert(node);
+ node->data = j;
+ node->next = list.c[i].head;
+ list.c[i].head = node;
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_create(&test_threads[i], NULL,
+ test_percpu_list_thread, &list);
+ if (ret) {
+ errno = ret;
+ perror("pthread_create");
+ abort();
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_join(test_threads[i], NULL);
+ if (ret) {
+ errno = ret;
+ perror("pthread_join");
+ abort();
+ }
+ }
+
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ struct percpu_list_node *node;
+
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+
+ while ((node = __percpu_list_pop(&list, i))) {
+ sum += node->data;
+ free(node);
+ }
+ }
+
+ /*
+ * All entries should now be accounted for (unless some external
+ * actor is interfering with our allowed affinity while this
+ * test is running).
+ */
+ assert(sum == expected_sum);
+}
+
+bool this_cpu_buffer_push(struct percpu_buffer *buffer,
+ struct percpu_buffer_node *node,
+ int *_cpu)
+{
+ bool result = false;
+ int cpu;
+
+ for (;;) {
+ intptr_t *targetptr_spec, newval_spec;
+ intptr_t *targetptr_final, newval_final;
+ intptr_t offset;
+ int ret;
+
+ cpu = rseq_cpu_start();
+ offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
+ if (offset == buffer->c[cpu].buflen)
+ break;
+ newval_spec = (intptr_t)node;
+ targetptr_spec = (intptr_t *)&buffer->c[cpu].array[offset];
+ newval_final = offset + 1;
+ targetptr_final = &buffer->c[cpu].offset;
+ if (opt_mb)
+ ret = rseq_cmpeqv_trystorev_storev_release(
+ targetptr_final, offset, targetptr_spec,
+ newval_spec, newval_final, cpu);
+ else
+ ret = rseq_cmpeqv_trystorev_storev(targetptr_final,
+ offset, targetptr_spec, newval_spec,
+ newval_final, cpu);
+ if (rseq_likely(!ret)) {
+ result = true;
+ break;
+ }
+ /* Retry if comparison fails or rseq aborts. */
+ }
+ if (_cpu)
+ *_cpu = cpu;
+ return result;
+}
+
+struct percpu_buffer_node *this_cpu_buffer_pop(struct percpu_buffer *buffer,
+ int *_cpu)
+{
+ struct percpu_buffer_node *head;
+ int cpu;
+
+ for (;;) {
+ intptr_t *targetptr, newval;
+ intptr_t offset;
+ int ret;
+
+ cpu = rseq_cpu_start();
+ /* Load offset with single-copy atomicity. */
+ offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
+ if (offset == 0) {
+ head = NULL;
+ break;
+ }
+ head = RSEQ_READ_ONCE(buffer->c[cpu].array[offset - 1]);
+ newval = offset - 1;
+ targetptr = (intptr_t *)&buffer->c[cpu].offset;
+ ret = rseq_cmpeqv_cmpeqv_storev(targetptr, offset,
+ (intptr_t *)&buffer->c[cpu].array[offset - 1],
+ (intptr_t)head, newval, cpu);
+ if (rseq_likely(!ret))
+ break;
+ /* Retry if comparison fails or rseq aborts. */
+ }
+ if (_cpu)
+ *_cpu = cpu;
+ return head;
+}
+
+/*
+ * __percpu_buffer_pop is not safe against concurrent accesses. Should
+ * only be used on buffers that are not concurrently modified.
+ */
+struct percpu_buffer_node *__percpu_buffer_pop(struct percpu_buffer *buffer,
+ int cpu)
+{
+ struct percpu_buffer_node *head;
+ intptr_t offset;
+
+ offset = buffer->c[cpu].offset;
+ if (offset == 0)
+ return NULL;
+ head = buffer->c[cpu].array[offset - 1];
+ buffer->c[cpu].offset = offset - 1;
+ return head;
+}
+
+void *test_percpu_buffer_thread(void *arg)
+{
+ long long i, reps;
+ struct percpu_buffer *buffer = (struct percpu_buffer *)arg;
+
+ if (!opt_disable_rseq && rseq_register_current_thread())
+ abort();
+
+ reps = opt_reps;
+ for (i = 0; i < reps; i++) {
+ struct percpu_buffer_node *node;
+
+ node = this_cpu_buffer_pop(buffer, NULL);
+ if (opt_yield)
+ sched_yield(); /* encourage shuffling */
+ if (node) {
+ if (!this_cpu_buffer_push(buffer, node, NULL)) {
+ /* Should increase buffer size. */
+ abort();
+ }
+ }
+ }
+
+ printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
+ (int) gettid(), nr_abort, signals_delivered);
+ if (!opt_disable_rseq && rseq_unregister_current_thread())
+ abort();
+
+ return NULL;
+}
+
+/* Simultaneous modification to a per-cpu buffer from many threads. */
+void test_percpu_buffer(void)
+{
+ const int num_threads = opt_threads;
+ int i, j, ret;
+ uint64_t sum = 0, expected_sum = 0;
+ struct percpu_buffer buffer;
+ pthread_t test_threads[num_threads];
+ cpu_set_t allowed_cpus;
+
+ memset(&buffer, 0, sizeof(buffer));
+
+ /* Generate list entries for every usable cpu. */
+ sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+ /* Worse-case is every item in same CPU. */
+ buffer.c[i].array =
+ malloc(sizeof(*buffer.c[i].array) * CPU_SETSIZE *
+ BUFFER_ITEM_PER_CPU);
+ assert(buffer.c[i].array);
+ buffer.c[i].buflen = CPU_SETSIZE * BUFFER_ITEM_PER_CPU;
+ for (j = 1; j <= BUFFER_ITEM_PER_CPU; j++) {
+ struct percpu_buffer_node *node;
+
+ expected_sum += j;
+
+ /*
+ * We could theoretically put the word-sized
+ * "data" directly in the buffer. However, we
+ * want to model objects that would not fit
+ * within a single word, so allocate an object
+ * for each node.
+ */
+ node = malloc(sizeof(*node));
+ assert(node);
+ node->data = j;
+ buffer.c[i].array[j - 1] = node;
+ buffer.c[i].offset++;
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_create(&test_threads[i], NULL,
+ test_percpu_buffer_thread, &buffer);
+ if (ret) {
+ errno = ret;
+ perror("pthread_create");
+ abort();
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_join(test_threads[i], NULL);
+ if (ret) {
+ errno = ret;
+ perror("pthread_join");
+ abort();
+ }
+ }
+
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ struct percpu_buffer_node *node;
+
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+
+ while ((node = __percpu_buffer_pop(&buffer, i))) {
+ sum += node->data;
+ free(node);
+ }
+ free(buffer.c[i].array);
+ }
+
+ /*
+ * All entries should now be accounted for (unless some external
+ * actor is interfering with our allowed affinity while this
+ * test is running).
+ */
+ assert(sum == expected_sum);
+}
+
+bool this_cpu_memcpy_buffer_push(struct percpu_memcpy_buffer *buffer,
+ struct percpu_memcpy_buffer_node item,
+ int *_cpu)
+{
+ bool result = false;
+ int cpu;
+
+ for (;;) {
+ intptr_t *targetptr_final, newval_final, offset;
+ char *destptr, *srcptr;
+ size_t copylen;
+ int ret;
+
+ cpu = rseq_cpu_start();
+ /* Load offset with single-copy atomicity. */
+ offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
+ if (offset == buffer->c[cpu].buflen)
+ break;
+ destptr = (char *)&buffer->c[cpu].array[offset];
+ srcptr = (char *)&item;
+ /* copylen must be <= 4kB. */
+ copylen = sizeof(item);
+ newval_final = offset + 1;
+ targetptr_final = &buffer->c[cpu].offset;
+ if (opt_mb)
+ ret = rseq_cmpeqv_trymemcpy_storev_release(
+ targetptr_final, offset,
+ destptr, srcptr, copylen,
+ newval_final, cpu);
+ else
+ ret = rseq_cmpeqv_trymemcpy_storev(targetptr_final,
+ offset, destptr, srcptr, copylen,
+ newval_final, cpu);
+ if (rseq_likely(!ret)) {
+ result = true;
+ break;
+ }
+ /* Retry if comparison fails or rseq aborts. */
+ }
+ if (_cpu)
+ *_cpu = cpu;
+ return result;
+}
+
+bool this_cpu_memcpy_buffer_pop(struct percpu_memcpy_buffer *buffer,
+ struct percpu_memcpy_buffer_node *item,
+ int *_cpu)
+{
+ bool result = false;
+ int cpu;
+
+ for (;;) {
+ intptr_t *targetptr_final, newval_final, offset;
+ char *destptr, *srcptr;
+ size_t copylen;
+ int ret;
+
+ cpu = rseq_cpu_start();
+ /* Load offset with single-copy atomicity. */
+ offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
+ if (offset == 0)
+ break;
+ destptr = (char *)item;
+ srcptr = (char *)&buffer->c[cpu].array[offset - 1];
+ /* copylen must be <= 4kB. */
+ copylen = sizeof(*item);
+ newval_final = offset - 1;
+ targetptr_final = &buffer->c[cpu].offset;
+ ret = rseq_cmpeqv_trymemcpy_storev(targetptr_final,
+ offset, destptr, srcptr, copylen,
+ newval_final, cpu);
+ if (rseq_likely(!ret)) {
+ result = true;
+ break;
+ }
+ /* Retry if comparison fails or rseq aborts. */
+ }
+ if (_cpu)
+ *_cpu = cpu;
+ return result;
+}
+
+/*
+ * __percpu_memcpy_buffer_pop is not safe against concurrent accesses. Should
+ * only be used on buffers that are not concurrently modified.
+ */
+bool __percpu_memcpy_buffer_pop(struct percpu_memcpy_buffer *buffer,
+ struct percpu_memcpy_buffer_node *item,
+ int cpu)
+{
+ intptr_t offset;
+
+ offset = buffer->c[cpu].offset;
+ if (offset == 0)
+ return false;
+ memcpy(item, &buffer->c[cpu].array[offset - 1], sizeof(*item));
+ buffer->c[cpu].offset = offset - 1;
+ return true;
+}
+
+void *test_percpu_memcpy_buffer_thread(void *arg)
+{
+ long long i, reps;
+ struct percpu_memcpy_buffer *buffer = (struct percpu_memcpy_buffer *)arg;
+
+ if (!opt_disable_rseq && rseq_register_current_thread())
+ abort();
+
+ reps = opt_reps;
+ for (i = 0; i < reps; i++) {
+ struct percpu_memcpy_buffer_node item;
+ bool result;
+
+ result = this_cpu_memcpy_buffer_pop(buffer, &item, NULL);
+ if (opt_yield)
+ sched_yield(); /* encourage shuffling */
+ if (result) {
+ if (!this_cpu_memcpy_buffer_push(buffer, item, NULL)) {
+ /* Should increase buffer size. */
+ abort();
+ }
+ }
+ }
+
+ printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
+ (int) gettid(), nr_abort, signals_delivered);
+ if (!opt_disable_rseq && rseq_unregister_current_thread())
+ abort();
+
+ return NULL;
+}
+
+/* Simultaneous modification to a per-cpu buffer from many threads. */
+void test_percpu_memcpy_buffer(void)
+{
+ const int num_threads = opt_threads;
+ int i, j, ret;
+ uint64_t sum = 0, expected_sum = 0;
+ struct percpu_memcpy_buffer buffer;
+ pthread_t test_threads[num_threads];
+ cpu_set_t allowed_cpus;
+
+ memset(&buffer, 0, sizeof(buffer));
+
+ /* Generate list entries for every usable cpu. */
+ sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+ /* Worse-case is every item in same CPU. */
+ buffer.c[i].array =
+ malloc(sizeof(*buffer.c[i].array) * CPU_SETSIZE *
+ MEMCPY_BUFFER_ITEM_PER_CPU);
+ assert(buffer.c[i].array);
+ buffer.c[i].buflen = CPU_SETSIZE * MEMCPY_BUFFER_ITEM_PER_CPU;
+ for (j = 1; j <= MEMCPY_BUFFER_ITEM_PER_CPU; j++) {
+ expected_sum += 2 * j + 1;
+
+ /*
+ * We could theoretically put the word-sized
+ * "data" directly in the buffer. However, we
+ * want to model objects that would not fit
+ * within a single word, so allocate an object
+ * for each node.
+ */
+ buffer.c[i].array[j - 1].data1 = j;
+ buffer.c[i].array[j - 1].data2 = j + 1;
+ buffer.c[i].offset++;
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_create(&test_threads[i], NULL,
+ test_percpu_memcpy_buffer_thread,
+ &buffer);
+ if (ret) {
+ errno = ret;
+ perror("pthread_create");
+ abort();
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_join(test_threads[i], NULL);
+ if (ret) {
+ errno = ret;
+ perror("pthread_join");
+ abort();
+ }
+ }
+
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ struct percpu_memcpy_buffer_node item;
+
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+
+ while (__percpu_memcpy_buffer_pop(&buffer, &item, i)) {
+ sum += item.data1;
+ sum += item.data2;
+ }
+ free(buffer.c[i].array);
+ }
+
+ /*
+ * All entries should now be accounted for (unless some external
+ * actor is interfering with our allowed affinity while this
+ * test is running).
+ */
+ assert(sum == expected_sum);
+}
+
+static void test_signal_interrupt_handler(int signo)
+{
+ signals_delivered++;
+}
+
+static int set_signal_handler(void)
+{
+ int ret = 0;
+ struct sigaction sa;
+ sigset_t sigset;
+
+ ret = sigemptyset(&sigset);
+ if (ret < 0) {
+ perror("sigemptyset");
+ return ret;
+ }
+
+ sa.sa_handler = test_signal_interrupt_handler;
+ sa.sa_mask = sigset;
+ sa.sa_flags = 0;
+ ret = sigaction(SIGUSR1, &sa, NULL);
+ if (ret < 0) {
+ perror("sigaction");
+ return ret;
+ }
+
+ printf_verbose("Signal handler set for SIGUSR1\n");
+
+ return ret;
+}
+
+static void show_usage(int argc, char **argv)
+{
+ printf("Usage : %s <OPTIONS>\n",
+ argv[0]);
+ printf("OPTIONS:\n");
+ printf(" [-1 loops] Number of loops for delay injection 1\n");
+ printf(" [-2 loops] Number of loops for delay injection 2\n");
+ printf(" [-3 loops] Number of loops for delay injection 3\n");
+ printf(" [-4 loops] Number of loops for delay injection 4\n");
+ printf(" [-5 loops] Number of loops for delay injection 5\n");
+ printf(" [-6 loops] Number of loops for delay injection 6\n");
+ printf(" [-7 loops] Number of loops for delay injection 7 (-1 to enable -m)\n");
+ printf(" [-8 loops] Number of loops for delay injection 8 (-1 to enable -m)\n");
+ printf(" [-9 loops] Number of loops for delay injection 9 (-1 to enable -m)\n");
+ printf(" [-m N] Yield/sleep/kill every modulo N (default 0: disabled) (>= 0)\n");
+ printf(" [-y] Yield\n");
+ printf(" [-k] Kill thread with signal\n");
+ printf(" [-s S] S: =0: disabled (default), >0: sleep time (ms)\n");
+ printf(" [-t N] Number of threads (default 200)\n");
+ printf(" [-r N] Number of repetitions per thread (default 5000)\n");
+ printf(" [-d] Disable rseq system call (no initialization)\n");
+ printf(" [-D M] Disable rseq for each M threads\n");
+ printf(" [-T test] Choose test: (s)pinlock, (l)ist, (b)uffer, (m)emcpy, (i)ncrement\n");
+ printf(" [-M] Push into buffer and memcpy buffer with memory barriers.\n");
+ printf(" [-v] Verbose output.\n");
+ printf(" [-h] Show this help.\n");
+ printf("\n");
+}
+
+int main(int argc, char **argv)
+{
+ int i;
+
+ for (i = 1; i < argc; i++) {
+ if (argv[i][0] != '-')
+ continue;
+ switch (argv[i][1]) {
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ loop_cnt[argv[i][1] - '0'] = atol(argv[i + 1]);
+ i++;
+ break;
+ case 'm':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_modulo = atol(argv[i + 1]);
+ if (opt_modulo < 0) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 's':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_sleep = atol(argv[i + 1]);
+ if (opt_sleep < 0) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 'y':
+ opt_yield = 1;
+ break;
+ case 'k':
+ opt_signal = 1;
+ break;
+ case 'd':
+ opt_disable_rseq = 1;
+ break;
+ case 'D':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_disable_mod = atol(argv[i + 1]);
+ if (opt_disable_mod < 0) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 't':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_threads = atol(argv[i + 1]);
+ if (opt_threads < 0) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 'r':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_reps = atoll(argv[i + 1]);
+ if (opt_reps < 0) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 'h':
+ show_usage(argc, argv);
+ goto end;
+ case 'T':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_test = *argv[i + 1];
+ switch (opt_test) {
+ case 's':
+ case 'l':
+ case 'i':
+ case 'b':
+ case 'm':
+ break;
+ default:
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 'v':
+ verbose = 1;
+ break;
+ case 'M':
+ opt_mb = 1;
+ break;
+ default:
+ show_usage(argc, argv);
+ goto error;
+ }
+ }
+
+ loop_cnt_1 = loop_cnt[1];
+ loop_cnt_2 = loop_cnt[2];
+ loop_cnt_3 = loop_cnt[3];
+ loop_cnt_4 = loop_cnt[4];
+ loop_cnt_5 = loop_cnt[5];
+ loop_cnt_6 = loop_cnt[6];
+
+ if (set_signal_handler())
+ goto error;
+
+ if (!opt_disable_rseq && rseq_register_current_thread())
+ goto error;
+ switch (opt_test) {
+ case 's':
+ printf_verbose("spinlock\n");
+ test_percpu_spinlock();
+ break;
+ case 'l':
+ printf_verbose("linked list\n");
+ test_percpu_list();
+ break;
+ case 'b':
+ printf_verbose("buffer\n");
+ test_percpu_buffer();
+ break;
+ case 'm':
+ printf_verbose("memcpy buffer\n");
+ test_percpu_memcpy_buffer();
+ break;
+ case 'i':
+ printf_verbose("counter increment\n");
+ test_percpu_inc();
+ break;
+ }
+ if (!opt_disable_rseq && rseq_unregister_current_thread())
+ abort();
+end:
+ return 0;
+
+error:
+ return -1;
+}
--
2.11.0
--
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7 years
- 1
- 0
[PATCH 12/14] rseq: selftests: Provide basic percpu ops test (v2)
by Mathieu Desnoyers
"basic_percpu_ops_test" is a slightly more "realistic" variant,
implementing a few simple per-cpu operations and testing their
correctness.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
Changes since v1:
- Use only rseq, remove use of cpu_opv system call.
---
.../testing/selftests/rseq/basic_percpu_ops_test.c | 313 +++++++++++++++++++++
1 file changed, 313 insertions(+)
create mode 100644 tools/testing/selftests/rseq/basic_percpu_ops_test.c
diff --git a/tools/testing/selftests/rseq/basic_percpu_ops_test.c b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
new file mode 100644
index 000000000000..96ef27905879
--- /dev/null
+++ b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
@@ -0,0 +1,313 @@
+// SPDX-License-Identifier: LGPL-2.1
+#define _GNU_SOURCE
+#include <assert.h>
+#include <pthread.h>
+#include <sched.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stddef.h>
+
+#include "rseq.h"
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+struct percpu_lock_entry {
+ intptr_t v;
+} __attribute__((aligned(128)));
+
+struct percpu_lock {
+ struct percpu_lock_entry c[CPU_SETSIZE];
+};
+
+struct test_data_entry {
+ intptr_t count;
+} __attribute__((aligned(128)));
+
+struct spinlock_test_data {
+ struct percpu_lock lock;
+ struct test_data_entry c[CPU_SETSIZE];
+ int reps;
+};
+
+struct percpu_list_node {
+ intptr_t data;
+ struct percpu_list_node *next;
+};
+
+struct percpu_list_entry {
+ struct percpu_list_node *head;
+} __attribute__((aligned(128)));
+
+struct percpu_list {
+ struct percpu_list_entry c[CPU_SETSIZE];
+};
+
+/* A simple percpu spinlock. Returns the cpu lock was acquired on. */
+int rseq_this_cpu_lock(struct percpu_lock *lock)
+{
+ int cpu;
+
+ for (;;) {
+ int ret;
+
+ cpu = rseq_cpu_start();
+ ret = rseq_cmpeqv_storev(&lock->c[cpu].v,
+ 0, 1, cpu);
+ if (rseq_likely(!ret))
+ break;
+ /* Retry if comparison fails or rseq aborts. */
+ }
+ /*
+ * Acquire semantic when taking lock after control dependency.
+ * Matches rseq_smp_store_release().
+ */
+ rseq_smp_acquire__after_ctrl_dep();
+ return cpu;
+}
+
+void rseq_percpu_unlock(struct percpu_lock *lock, int cpu)
+{
+ assert(lock->c[cpu].v == 1);
+ /*
+ * Release lock, with release semantic. Matches
+ * rseq_smp_acquire__after_ctrl_dep().
+ */
+ rseq_smp_store_release(&lock->c[cpu].v, 0);
+}
+
+void *test_percpu_spinlock_thread(void *arg)
+{
+ struct spinlock_test_data *data = arg;
+ int i, cpu;
+
+ if (rseq_register_current_thread()) {
+ fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ abort();
+ }
+ for (i = 0; i < data->reps; i++) {
+ cpu = rseq_this_cpu_lock(&data->lock);
+ data->c[cpu].count++;
+ rseq_percpu_unlock(&data->lock, cpu);
+ }
+ if (rseq_unregister_current_thread()) {
+ fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ abort();
+ }
+
+ return NULL;
+}
+
+/*
+ * A simple test which implements a sharded counter using a per-cpu
+ * lock. Obviously real applications might prefer to simply use a
+ * per-cpu increment; however, this is reasonable for a test and the
+ * lock can be extended to synchronize more complicated operations.
+ */
+void test_percpu_spinlock(void)
+{
+ const int num_threads = 200;
+ int i;
+ uint64_t sum;
+ pthread_t test_threads[num_threads];
+ struct spinlock_test_data data;
+
+ memset(&data, 0, sizeof(data));
+ data.reps = 5000;
+
+ for (i = 0; i < num_threads; i++)
+ pthread_create(&test_threads[i], NULL,
+ test_percpu_spinlock_thread, &data);
+
+ for (i = 0; i < num_threads; i++)
+ pthread_join(test_threads[i], NULL);
+
+ sum = 0;
+ for (i = 0; i < CPU_SETSIZE; i++)
+ sum += data.c[i].count;
+
+ assert(sum == (uint64_t)data.reps * num_threads);
+}
+
+void this_cpu_list_push(struct percpu_list *list,
+ struct percpu_list_node *node,
+ int *_cpu)
+{
+ int cpu;
+
+ for (;;) {
+ intptr_t *targetptr, newval, expect;
+ int ret;
+
+ cpu = rseq_cpu_start();
+ /* Load list->c[cpu].head with single-copy atomicity. */
+ expect = (intptr_t)RSEQ_READ_ONCE(list->c[cpu].head);
+ newval = (intptr_t)node;
+ targetptr = (intptr_t *)&list->c[cpu].head;
+ node->next = (struct percpu_list_node *)expect;
+ ret = rseq_cmpeqv_storev(targetptr, expect, newval, cpu);
+ if (rseq_likely(!ret))
+ break;
+ /* Retry if comparison fails or rseq aborts. */
+ }
+ if (_cpu)
+ *_cpu = cpu;
+}
+
+/*
+ * Unlike a traditional lock-less linked list; the availability of a
+ * rseq primitive allows us to implement pop without concerns over
+ * ABA-type races.
+ */
+struct percpu_list_node *this_cpu_list_pop(struct percpu_list *list,
+ int *_cpu)
+{
+ for (;;) {
+ struct percpu_list_node *head;
+ intptr_t *targetptr, expectnot, *load;
+ off_t offset;
+ int ret, cpu;
+
+ cpu = rseq_cpu_start();
+ targetptr = (intptr_t *)&list->c[cpu].head;
+ expectnot = (intptr_t)NULL;
+ offset = offsetof(struct percpu_list_node, next);
+ load = (intptr_t *)&head;
+ ret = rseq_cmpnev_storeoffp_load(targetptr, expectnot,
+ offset, load, cpu);
+ if (rseq_likely(!ret)) {
+ if (_cpu)
+ *_cpu = cpu;
+ return head;
+ }
+ if (ret > 0)
+ return NULL;
+ /* Retry if rseq aborts. */
+ }
+}
+
+/*
+ * __percpu_list_pop is not safe against concurrent accesses. Should
+ * only be used on lists that are not concurrently modified.
+ */
+struct percpu_list_node *__percpu_list_pop(struct percpu_list *list, int cpu)
+{
+ struct percpu_list_node *node;
+
+ node = list->c[cpu].head;
+ if (!node)
+ return NULL;
+ list->c[cpu].head = node->next;
+ return node;
+}
+
+void *test_percpu_list_thread(void *arg)
+{
+ int i;
+ struct percpu_list *list = (struct percpu_list *)arg;
+
+ if (rseq_register_current_thread()) {
+ fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ abort();
+ }
+
+ for (i = 0; i < 100000; i++) {
+ struct percpu_list_node *node;
+
+ node = this_cpu_list_pop(list, NULL);
+ sched_yield(); /* encourage shuffling */
+ if (node)
+ this_cpu_list_push(list, node, NULL);
+ }
+
+ if (rseq_unregister_current_thread()) {
+ fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ abort();
+ }
+
+ return NULL;
+}
+
+/* Simultaneous modification to a per-cpu linked list from many threads. */
+void test_percpu_list(void)
+{
+ int i, j;
+ uint64_t sum = 0, expected_sum = 0;
+ struct percpu_list list;
+ pthread_t test_threads[200];
+ cpu_set_t allowed_cpus;
+
+ memset(&list, 0, sizeof(list));
+
+ /* Generate list entries for every usable cpu. */
+ sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+ for (j = 1; j <= 100; j++) {
+ struct percpu_list_node *node;
+
+ expected_sum += j;
+
+ node = malloc(sizeof(*node));
+ assert(node);
+ node->data = j;
+ node->next = list.c[i].head;
+ list.c[i].head = node;
+ }
+ }
+
+ for (i = 0; i < 200; i++)
+ pthread_create(&test_threads[i], NULL,
+ test_percpu_list_thread, &list);
+
+ for (i = 0; i < 200; i++)
+ pthread_join(test_threads[i], NULL);
+
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ struct percpu_list_node *node;
+
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+
+ while ((node = __percpu_list_pop(&list, i))) {
+ sum += node->data;
+ free(node);
+ }
+ }
+
+ /*
+ * All entries should now be accounted for (unless some external
+ * actor is interfering with our allowed affinity while this
+ * test is running).
+ */
+ assert(sum == expected_sum);
+}
+
+int main(int argc, char **argv)
+{
+ if (rseq_register_current_thread()) {
+ fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ goto error;
+ }
+ printf("spinlock\n");
+ test_percpu_spinlock();
+ printf("percpu_list\n");
+ test_percpu_list();
+ if (rseq_unregister_current_thread()) {
+ fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ goto error;
+ }
+ return 0;
+
+error:
+ return -1;
+}
+
--
2.11.0
--
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7 years
- 1
- 0
[PATCH 11/14] rseq: selftests: Provide basic test
by Mathieu Desnoyers
"basic_test" only asserts that RSEQ works moderately correctly. E.g.
that the CPUID pointer works.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
tools/testing/selftests/rseq/basic_test.c | 56 +++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
create mode 100644 tools/testing/selftests/rseq/basic_test.c
diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c
new file mode 100644
index 000000000000..d8efbfb89193
--- /dev/null
+++ b/tools/testing/selftests/rseq/basic_test.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Basic test coverage for critical regions and rseq_current_cpu().
+ */
+
+#define _GNU_SOURCE
+#include <assert.h>
+#include <sched.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/time.h>
+
+#include "rseq.h"
+
+void test_cpu_pointer(void)
+{
+ cpu_set_t affinity, test_affinity;
+ int i;
+
+ sched_getaffinity(0, sizeof(affinity), &affinity);
+ CPU_ZERO(&test_affinity);
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ if (CPU_ISSET(i, &affinity)) {
+ CPU_SET(i, &test_affinity);
+ sched_setaffinity(0, sizeof(test_affinity),
+ &test_affinity);
+ assert(sched_getcpu() == i);
+ assert(rseq_current_cpu() == i);
+ assert(rseq_current_cpu_raw() == i);
+ assert(rseq_cpu_start() == i);
+ CPU_CLR(i, &test_affinity);
+ }
+ }
+ sched_setaffinity(0, sizeof(affinity), &affinity);
+}
+
+int main(int argc, char **argv)
+{
+ if (rseq_register_current_thread()) {
+ fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ goto init_thread_error;
+ }
+ printf("testing current cpu\n");
+ test_cpu_pointer();
+ if (rseq_unregister_current_thread()) {
+ fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ goto init_thread_error;
+ }
+ return 0;
+
+init_thread_error:
+ return -1;
+}
--
2.11.0
--
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7 years
- 1
- 0
[PATCH 10/14] rseq: selftests: Provide rseq library (v5)
by Mathieu Desnoyers
This rseq helper library provides a user-space API to the rseq()
system call.
The rseq fast-path exposes the instruction pointer addresses where the
rseq assembly blocks begin and end, as well as the associated abort
instruction pointer, in the __rseq_table section. This section allows
debuggers may know where to place breakpoints when single-stepping
through assembly blocks which may be aborted at any point by the kernel.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
Changes since v1:
- Provide abort-ip signature: The abort-ip signature is located just
before the abort-ip target. It is currently hardcoded, but a
user-space application could use the __rseq_table to iterate on all
abort-ip targets and use a random value as signature if needed in the
future.
- Add rseq_prepare_unload(): Libraries and JIT code using rseq critical
sections need to issue rseq_prepare_unload() on each thread at least
once before reclaim of struct rseq_cs.
- Use initial-exec TLS model, non-weak symbol: The initial-exec model is
signal-safe, whereas the global-dynamic model is not. Remove the
"weak" symbol attribute from the __rseq_abi in rseq.c. The rseq.so
library will have ownership of that symbol, and there is not reason for
an application or user library to try to define that symbol.
The expected use is to link against libreq.so, which owns and provide
that symbol.
- Set cpu_id to -2 on register error
- Add rseq_len syscall parameter, rseq_cs version
- Ensure disassember-friendly signature: x86 32/64 disassembler have a
hard time decoding the instruction stream after a bad instruction. Use
a nopl instruction to encode the signature. Suggested by Andy Lutomirski.
- Exercise parametrized tests variants in a shell scripts.
- Restartable sequences selftests: Remove use of event counter.
- Use cpu_id_start field: With the cpu_id_start field, the C
preparation phase of the fast-path does not need to compare cpu_id < 0
anymore.
- Signal-safe registration and refcounting: Allow libraries using
librseq.so to register it from signal handlers.
- Use OVERRIDE_TARGETS in makefile.
- Use "m" constraints for rseq_cs field.
Changes since v2:
- Update based on Thomas Gleixner's comments.
Changes since v3:
- Generate param_test_skip_fastpath and param_test_benchmark with
-DSKIP_FASTPATH and -DBENCHMARK (respectively). Add param_test_fastpath
to run_param_test.sh.
Changes since v4:
- Fold arm: workaround gcc asm size guess,
- Namespace barrier() -> rseq_barrier() in library header,
- Take into account coding style feedback from Peter Zijlstra,
- Split rseq selftests into logical commits.
---
tools/testing/selftests/rseq/rseq-arm.h | 715 +++++++++++++++++++
tools/testing/selftests/rseq/rseq-ppc.h | 671 ++++++++++++++++++
tools/testing/selftests/rseq/rseq-skip.h | 65 ++
tools/testing/selftests/rseq/rseq-x86.h | 1132 ++++++++++++++++++++++++++++++
tools/testing/selftests/rseq/rseq.c | 117 +++
tools/testing/selftests/rseq/rseq.h | 147 ++++
6 files changed, 2847 insertions(+)
create mode 100644 tools/testing/selftests/rseq/rseq-arm.h
create mode 100644 tools/testing/selftests/rseq/rseq-ppc.h
create mode 100644 tools/testing/selftests/rseq/rseq-skip.h
create mode 100644 tools/testing/selftests/rseq/rseq-x86.h
create mode 100644 tools/testing/selftests/rseq/rseq.c
create mode 100644 tools/testing/selftests/rseq/rseq.h
diff --git a/tools/testing/selftests/rseq/rseq-arm.h b/tools/testing/selftests/rseq/rseq-arm.h
new file mode 100644
index 000000000000..3b055f9aeaab
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-arm.h
@@ -0,0 +1,715 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * rseq-arm.h
+ *
+ * (C) Copyright 2016-2018 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ */
+
+#define RSEQ_SIG 0x53053053
+
+#define rseq_smp_mb() __asm__ __volatile__ ("dmb" ::: "memory", "cc")
+#define rseq_smp_rmb() __asm__ __volatile__ ("dmb" ::: "memory", "cc")
+#define rseq_smp_wmb() __asm__ __volatile__ ("dmb" ::: "memory", "cc")
+
+#define rseq_smp_load_acquire(p) \
+__extension__ ({ \
+ __typeof(*p) ____p1 = RSEQ_READ_ONCE(*p); \
+ rseq_smp_mb(); \
+ ____p1; \
+})
+
+#define rseq_smp_acquire__after_ctrl_dep() rseq_smp_rmb()
+
+#define rseq_smp_store_release(p, v) \
+do { \
+ rseq_smp_mb(); \
+ RSEQ_WRITE_ONCE(*p, v); \
+} while (0)
+
+#ifdef RSEQ_SKIP_FASTPATH
+#include "rseq-skip.h"
+#else /* !RSEQ_SKIP_FASTPATH */
+
+#define __RSEQ_ASM_DEFINE_TABLE(version, flags, start_ip, \
+ post_commit_offset, abort_ip) \
+ ".pushsection __rseq_table, \"aw\"\n\t" \
+ ".balign 32\n\t" \
+ ".word " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ ".word " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) ", 0x0\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_DEFINE_TABLE(start_ip, post_commit_ip, abort_ip) \
+ __RSEQ_ASM_DEFINE_TABLE(0x0, 0x0, start_ip, \
+ (post_commit_ip - start_ip), abort_ip)
+
+#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
+ RSEQ_INJECT_ASM(1) \
+ "adr r0, " __rseq_str(cs_label) "\n\t" \
+ "str r0, %[" __rseq_str(rseq_cs) "]\n\t" \
+ __rseq_str(label) ":\n\t"
+
+#define RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, label) \
+ RSEQ_INJECT_ASM(2) \
+ "ldr r0, %[" __rseq_str(current_cpu_id) "]\n\t" \
+ "cmp %[" __rseq_str(cpu_id) "], r0\n\t" \
+ "bne " __rseq_str(label) "\n\t"
+
+#define __RSEQ_ASM_DEFINE_ABORT(table_label, label, teardown, \
+ abort_label, version, flags, \
+ start_ip, post_commit_offset, abort_ip) \
+ __rseq_str(table_label) ":\n\t" \
+ ".word " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ ".word " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) ", 0x0\n\t" \
+ ".word " __rseq_str(RSEQ_SIG) "\n\t" \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "b %l[" __rseq_str(abort_label) "]\n\t"
+
+#define RSEQ_ASM_DEFINE_ABORT(table_label, label, teardown, abort_label, \
+ start_ip, post_commit_ip, abort_ip) \
+ __RSEQ_ASM_DEFINE_ABORT(table_label, label, teardown, \
+ abort_label, 0x0, 0x0, start_ip, \
+ (post_commit_ip - start_ip), abort_ip)
+
+#define RSEQ_ASM_DEFINE_CMPFAIL(label, teardown, cmpfail_label) \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "b %l[" __rseq_str(cmpfail_label) "]\n\t"
+
+#define rseq_workaround_gcc_asm_size_guess() __asm__ __volatile__("")
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[error2]\n\t"
+#endif
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expectnot], r0\n\t"
+ "beq %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "ldr r0, %[v]\n\t"
+ "cmp %[expectnot], r0\n\t"
+ "beq %l[error2]\n\t"
+#endif
+ "str r0, %[load]\n\t"
+ "add r0, %[voffp]\n\t"
+ "ldr r0, [r0]\n\t"
+ /* final store */
+ "str r0, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expectnot] "r" (expectnot),
+ [voffp] "Ir" (voffp),
+ [load] "m" (*load)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_addv(intptr_t *v, intptr_t count, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+#endif
+ "ldr r0, %[v]\n\t"
+ "add r0, %[count]\n\t"
+ /* final store */
+ "str r0, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(4)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [v] "m" (*v),
+ [count] "Ir" (count)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort
+#ifdef RSEQ_COMPARE_TWICE
+ , error1
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[error2]\n\t"
+#endif
+ /* try store */
+ "str %[newv2], %[v2]\n\t"
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[error2]\n\t"
+#endif
+ /* try store */
+ "str %[newv2], %[v2]\n\t"
+ RSEQ_INJECT_ASM(5)
+ "dmb\n\t" /* full mb provides store-release */
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+ "ldr r0, %[v2]\n\t"
+ "cmp %[expect2], r0\n\t"
+ "bne %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(5)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[error2]\n\t"
+ "ldr r0, %[v2]\n\t"
+ "cmp %[expect2], r0\n\t"
+ "bne %l[error3]\n\t"
+#endif
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* cmp2 input */
+ [v2] "m" (*v2),
+ [expect2] "r" (expect2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2, error3
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("1st expected value comparison failed");
+error3:
+ rseq_bug("2nd expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ uint32_t rseq_scratch[3];
+
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ "str %[src], %[rseq_scratch0]\n\t"
+ "str %[dst], %[rseq_scratch1]\n\t"
+ "str %[len], %[rseq_scratch2]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne 5f\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne 7f\n\t"
+#endif
+ /* try memcpy */
+ "cmp %[len], #0\n\t" \
+ "beq 333f\n\t" \
+ "222:\n\t" \
+ "ldrb %%r0, [%[src]]\n\t" \
+ "strb %%r0, [%[dst]]\n\t" \
+ "adds %[src], #1\n\t" \
+ "adds %[dst], #1\n\t" \
+ "subs %[len], #1\n\t" \
+ "bne 222b\n\t" \
+ "333:\n\t" \
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t"
+ "b 8f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ abort, 1b, 2b, 4f)
+ RSEQ_ASM_DEFINE_CMPFAIL(5,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ cmpfail)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_DEFINE_CMPFAIL(6,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ error1)
+ RSEQ_ASM_DEFINE_CMPFAIL(7,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ error2)
+#endif
+ "8:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len),
+ [rseq_scratch0] "m" (rseq_scratch[0]),
+ [rseq_scratch1] "m" (rseq_scratch[1]),
+ [rseq_scratch2] "m" (rseq_scratch[2])
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_workaround_gcc_asm_size_guess();
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_workaround_gcc_asm_size_guess();
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ uint32_t rseq_scratch[3];
+
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ "str %[src], %[rseq_scratch0]\n\t"
+ "str %[dst], %[rseq_scratch1]\n\t"
+ "str %[len], %[rseq_scratch2]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne 5f\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne 7f\n\t"
+#endif
+ /* try memcpy */
+ "cmp %[len], #0\n\t" \
+ "beq 333f\n\t" \
+ "222:\n\t" \
+ "ldrb %%r0, [%[src]]\n\t" \
+ "strb %%r0, [%[dst]]\n\t" \
+ "adds %[src], #1\n\t" \
+ "adds %[dst], #1\n\t" \
+ "subs %[len], #1\n\t" \
+ "bne 222b\n\t" \
+ "333:\n\t" \
+ RSEQ_INJECT_ASM(5)
+ "dmb\n\t" /* full mb provides store-release */
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t"
+ "b 8f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ abort, 1b, 2b, 4f)
+ RSEQ_ASM_DEFINE_CMPFAIL(5,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ cmpfail)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_DEFINE_CMPFAIL(6,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ error1)
+ RSEQ_ASM_DEFINE_CMPFAIL(7,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ error2)
+#endif
+ "8:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len),
+ [rseq_scratch0] "m" (rseq_scratch[0]),
+ [rseq_scratch1] "m" (rseq_scratch[1]),
+ [rseq_scratch2] "m" (rseq_scratch[2])
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_workaround_gcc_asm_size_guess();
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_workaround_gcc_asm_size_guess();
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+#endif /* !RSEQ_SKIP_FASTPATH */
diff --git a/tools/testing/selftests/rseq/rseq-ppc.h b/tools/testing/selftests/rseq/rseq-ppc.h
new file mode 100644
index 000000000000..52630c9f42be
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-ppc.h
@@ -0,0 +1,671 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * rseq-ppc.h
+ *
+ * (C) Copyright 2016-2018 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ * (C) Copyright 2016-2018 - Boqun Feng <boqun.feng(a)gmail.com>
+ */
+
+#define RSEQ_SIG 0x53053053
+
+#define rseq_smp_mb() __asm__ __volatile__ ("sync" ::: "memory", "cc")
+#define rseq_smp_lwsync() __asm__ __volatile__ ("lwsync" ::: "memory", "cc")
+#define rseq_smp_rmb() rseq_smp_lwsync()
+#define rseq_smp_wmb() rseq_smp_lwsync()
+
+#define rseq_smp_load_acquire(p) \
+__extension__ ({ \
+ __typeof(*p) ____p1 = RSEQ_READ_ONCE(*p); \
+ rseq_smp_lwsync(); \
+ ____p1; \
+})
+
+#define rseq_smp_acquire__after_ctrl_dep() rseq_smp_lwsync()
+
+#define rseq_smp_store_release(p, v) \
+do { \
+ rseq_smp_lwsync(); \
+ RSEQ_WRITE_ONCE(*p, v); \
+} while (0)
+
+#ifdef RSEQ_SKIP_FASTPATH
+#include "rseq-skip.h"
+#else /* !RSEQ_SKIP_FASTPATH */
+
+/*
+ * The __rseq_table section can be used by debuggers to better handle
+ * single-stepping through the restartable critical sections.
+ */
+
+#ifdef __PPC64__
+
+#define STORE_WORD "std "
+#define LOAD_WORD "ld "
+#define LOADX_WORD "ldx "
+#define CMP_WORD "cmpd "
+
+#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, \
+ start_ip, post_commit_offset, abort_ip) \
+ ".pushsection __rseq_table, \"aw\"\n\t" \
+ ".balign 32\n\t" \
+ __rseq_str(label) ":\n\t" \
+ ".long " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ ".quad " __rseq_str(start_ip) ", " __rseq_str(post_commit_offset) ", " __rseq_str(abort_ip) "\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
+ RSEQ_INJECT_ASM(1) \
+ "lis %%r17, (" __rseq_str(cs_label) ")@highest\n\t" \
+ "ori %%r17, %%r17, (" __rseq_str(cs_label) ")@higher\n\t" \
+ "rldicr %%r17, %%r17, 32, 31\n\t" \
+ "oris %%r17, %%r17, (" __rseq_str(cs_label) ")@high\n\t" \
+ "ori %%r17, %%r17, (" __rseq_str(cs_label) ")@l\n\t" \
+ "std %%r17, %[" __rseq_str(rseq_cs) "]\n\t" \
+ __rseq_str(label) ":\n\t"
+
+#else /* #ifdef __PPC64__ */
+
+#define STORE_WORD "stw "
+#define LOAD_WORD "lwz "
+#define LOADX_WORD "lwzx "
+#define CMP_WORD "cmpw "
+
+#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, \
+ start_ip, post_commit_offset, abort_ip) \
+ ".pushsection __rseq_table, \"aw\"\n\t" \
+ ".balign 32\n\t" \
+ __rseq_str(label) ":\n\t" \
+ ".long " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ /* 32-bit only supported on BE */ \
+ ".long 0x0, " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) "\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
+ RSEQ_INJECT_ASM(1) \
+ "lis %%r17, (" __rseq_str(cs_label) ")@ha\n\t" \
+ "addi %%r17, %%r17, (" __rseq_str(cs_label) ")@l\n\t" \
+ "stw %%r17, %[" __rseq_str(rseq_cs) "]\n\t" \
+ __rseq_str(label) ":\n\t"
+
+#endif /* #ifdef __PPC64__ */
+
+#define RSEQ_ASM_DEFINE_TABLE(label, start_ip, post_commit_ip, abort_ip) \
+ __RSEQ_ASM_DEFINE_TABLE(label, 0x0, 0x0, start_ip, \
+ (post_commit_ip - start_ip), abort_ip)
+
+#define RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, label) \
+ RSEQ_INJECT_ASM(2) \
+ "lwz %%r17, %[" __rseq_str(current_cpu_id) "]\n\t" \
+ "cmpw cr7, %[" __rseq_str(cpu_id) "], %%r17\n\t" \
+ "bne- cr7, " __rseq_str(label) "\n\t"
+
+#define RSEQ_ASM_DEFINE_ABORT(label, abort_label) \
+ ".pushsection __rseq_failure, \"ax\"\n\t" \
+ ".long " __rseq_str(RSEQ_SIG) "\n\t" \
+ __rseq_str(label) ":\n\t" \
+ "b %l[" __rseq_str(abort_label) "]\n\t" \
+ ".popsection\n\t"
+
+/*
+ * RSEQ_ASM_OPs: asm operations for rseq
+ * RSEQ_ASM_OP_R_*: has hard-code registers in it
+ * RSEQ_ASM_OP_* (else): doesn't have hard-code registers(unless cr7)
+ */
+#define RSEQ_ASM_OP_CMPEQ(var, expect, label) \
+ LOAD_WORD "%%r17, %[" __rseq_str(var) "]\n\t" \
+ CMP_WORD "cr7, %%r17, %[" __rseq_str(expect) "]\n\t" \
+ "bne- cr7, " __rseq_str(label) "\n\t"
+
+#define RSEQ_ASM_OP_CMPNE(var, expectnot, label) \
+ LOAD_WORD "%%r17, %[" __rseq_str(var) "]\n\t" \
+ CMP_WORD "cr7, %%r17, %[" __rseq_str(expectnot) "]\n\t" \
+ "beq- cr7, " __rseq_str(label) "\n\t"
+
+#define RSEQ_ASM_OP_STORE(value, var) \
+ STORE_WORD "%[" __rseq_str(value) "], %[" __rseq_str(var) "]\n\t"
+
+/* Load @var to r17 */
+#define RSEQ_ASM_OP_R_LOAD(var) \
+ LOAD_WORD "%%r17, %[" __rseq_str(var) "]\n\t"
+
+/* Store r17 to @var */
+#define RSEQ_ASM_OP_R_STORE(var) \
+ STORE_WORD "%%r17, %[" __rseq_str(var) "]\n\t"
+
+/* Add @count to r17 */
+#define RSEQ_ASM_OP_R_ADD(count) \
+ "add %%r17, %[" __rseq_str(count) "], %%r17\n\t"
+
+/* Load (r17 + voffp) to r17 */
+#define RSEQ_ASM_OP_R_LOADX(voffp) \
+ LOADX_WORD "%%r17, %[" __rseq_str(voffp) "], %%r17\n\t"
+
+/* TODO: implement a faster memcpy. */
+#define RSEQ_ASM_OP_R_MEMCPY() \
+ "cmpdi %%r19, 0\n\t" \
+ "beq 333f\n\t" \
+ "addi %%r20, %%r20, -1\n\t" \
+ "addi %%r21, %%r21, -1\n\t" \
+ "222:\n\t" \
+ "lbzu %%r18, 1(%%r20)\n\t" \
+ "stbu %%r18, 1(%%r21)\n\t" \
+ "addi %%r19, %%r19, -1\n\t" \
+ "cmpdi %%r19, 0\n\t" \
+ "bne 222b\n\t" \
+ "333:\n\t" \
+
+#define RSEQ_ASM_OP_R_FINAL_STORE(var, post_commit_label) \
+ STORE_WORD "%%r17, %[" __rseq_str(var) "]\n\t" \
+ __rseq_str(post_commit_label) ":\n\t"
+
+#define RSEQ_ASM_OP_FINAL_STORE(value, var, post_commit_label) \
+ STORE_WORD "%[" __rseq_str(value) "], %[" __rseq_str(var) "]\n\t" \
+ __rseq_str(post_commit_label) ":\n\t"
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+#endif
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v not equal to @expectnot */
+ RSEQ_ASM_OP_CMPNE(v, expectnot, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v not equal to @expectnot */
+ RSEQ_ASM_OP_CMPNE(v, expectnot, %l[error2])
+#endif
+ /* load the value of @v */
+ RSEQ_ASM_OP_R_LOAD(v)
+ /* store it in @load */
+ RSEQ_ASM_OP_R_STORE(load)
+ /* dereference voffp(v) */
+ RSEQ_ASM_OP_R_LOADX(voffp)
+ /* final store the value at voffp(v) */
+ RSEQ_ASM_OP_R_FINAL_STORE(v, 2)
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expectnot] "r" (expectnot),
+ [voffp] "b" (voffp),
+ [load] "m" (*load)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_addv(intptr_t *v, intptr_t count, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+#endif
+ /* load the value of @v */
+ RSEQ_ASM_OP_R_LOAD(v)
+ /* add @count to it */
+ RSEQ_ASM_OP_R_ADD(count)
+ /* final store */
+ RSEQ_ASM_OP_R_FINAL_STORE(v, 2)
+ RSEQ_INJECT_ASM(4)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [count] "r" (count)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort
+#ifdef RSEQ_COMPARE_TWICE
+ , error1
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+#endif
+ /* try store */
+ RSEQ_ASM_OP_STORE(newv2, v2)
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+#endif
+ /* try store */
+ RSEQ_ASM_OP_STORE(newv2, v2)
+ RSEQ_INJECT_ASM(5)
+ /* for 'release' */
+ "lwsync\n\t"
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+ /* cmp @v2 equal to @expct2 */
+ RSEQ_ASM_OP_CMPEQ(v2, expect2, %l[cmpfail])
+ RSEQ_INJECT_ASM(5)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+ /* cmp @v2 equal to @expct2 */
+ RSEQ_ASM_OP_CMPEQ(v2, expect2, %l[error3])
+#endif
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* cmp2 input */
+ [v2] "m" (*v2),
+ [expect2] "r" (expect2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2, error3
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("1st expected value comparison failed");
+error3:
+ rseq_bug("2nd expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* setup for mempcy */
+ "mr %%r19, %[len]\n\t"
+ "mr %%r20, %[src]\n\t"
+ "mr %%r21, %[dst]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+#endif
+ /* try memcpy */
+ RSEQ_ASM_OP_R_MEMCPY()
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17", "r18", "r19", "r20", "r21"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* setup for mempcy */
+ "mr %%r19, %[len]\n\t"
+ "mr %%r20, %[src]\n\t"
+ "mr %%r21, %[dst]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+#endif
+ /* try memcpy */
+ RSEQ_ASM_OP_R_MEMCPY()
+ RSEQ_INJECT_ASM(5)
+ /* for 'release' */
+ "lwsync\n\t"
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17", "r18", "r19", "r20", "r21"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+#undef STORE_WORD
+#undef LOAD_WORD
+#undef LOADX_WORD
+#undef CMP_WORD
+
+#endif /* !RSEQ_SKIP_FASTPATH */
diff --git a/tools/testing/selftests/rseq/rseq-skip.h b/tools/testing/selftests/rseq/rseq-skip.h
new file mode 100644
index 000000000000..72750b5905a9
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-skip.h
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * rseq-skip.h
+ *
+ * (C) Copyright 2017-2018 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ */
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_addv(intptr_t *v, intptr_t count, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ return -1;
+}
diff --git a/tools/testing/selftests/rseq/rseq-x86.h b/tools/testing/selftests/rseq/rseq-x86.h
new file mode 100644
index 000000000000..089410a314e9
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-x86.h
@@ -0,0 +1,1132 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * rseq-x86.h
+ *
+ * (C) Copyright 2016-2018 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ */
+
+#include <stdint.h>
+
+#define RSEQ_SIG 0x53053053
+
+#ifdef __x86_64__
+
+#define rseq_smp_mb() \
+ __asm__ __volatile__ ("lock; addl $0,-128(%%rsp)" ::: "memory", "cc")
+#define rseq_smp_rmb() rseq_barrier()
+#define rseq_smp_wmb() rseq_barrier()
+
+#define rseq_smp_load_acquire(p) \
+__extension__ ({ \
+ __typeof(*p) ____p1 = RSEQ_READ_ONCE(*p); \
+ rseq_barrier(); \
+ ____p1; \
+})
+
+#define rseq_smp_acquire__after_ctrl_dep() rseq_smp_rmb()
+
+#define rseq_smp_store_release(p, v) \
+do { \
+ rseq_barrier(); \
+ RSEQ_WRITE_ONCE(*p, v); \
+} while (0)
+
+#ifdef RSEQ_SKIP_FASTPATH
+#include "rseq-skip.h"
+#else /* !RSEQ_SKIP_FASTPATH */
+
+#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, \
+ start_ip, post_commit_offset, abort_ip) \
+ ".pushsection __rseq_table, \"aw\"\n\t" \
+ ".balign 32\n\t" \
+ __rseq_str(label) ":\n\t" \
+ ".long " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ ".quad " __rseq_str(start_ip) ", " __rseq_str(post_commit_offset) ", " __rseq_str(abort_ip) "\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_DEFINE_TABLE(label, start_ip, post_commit_ip, abort_ip) \
+ __RSEQ_ASM_DEFINE_TABLE(label, 0x0, 0x0, start_ip, \
+ (post_commit_ip - start_ip), abort_ip)
+
+#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
+ RSEQ_INJECT_ASM(1) \
+ "leaq " __rseq_str(cs_label) "(%%rip), %%rax\n\t" \
+ "movq %%rax, %[" __rseq_str(rseq_cs) "]\n\t" \
+ __rseq_str(label) ":\n\t"
+
+#define RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, label) \
+ RSEQ_INJECT_ASM(2) \
+ "cmpl %[" __rseq_str(cpu_id) "], %[" __rseq_str(current_cpu_id) "]\n\t" \
+ "jnz " __rseq_str(label) "\n\t"
+
+#define RSEQ_ASM_DEFINE_ABORT(label, teardown, abort_label) \
+ ".pushsection __rseq_failure, \"ax\"\n\t" \
+ /* Disassembler-friendly signature: nopl <sig>(%rip). */\
+ ".byte 0x0f, 0x1f, 0x05\n\t" \
+ ".long " __rseq_str(RSEQ_SIG) "\n\t" \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "jmp %l[" __rseq_str(abort_label) "]\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_DEFINE_CMPFAIL(label, teardown, cmpfail_label) \
+ ".pushsection __rseq_failure, \"ax\"\n\t" \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "jmp %l[" __rseq_str(cmpfail_label) "]\n\t" \
+ ".popsection\n\t"
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+#endif
+ /* final store */
+ "movq %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "rax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+/*
+ * Compare @v against @expectnot. When it does _not_ match, load @v
+ * into @load, and store the content of *@v + voffp into @v.
+ */
+static inline __attribute__((always_inline))
+int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "movq %[v], %%rbx\n\t"
+ "cmpq %%rbx, %[expectnot]\n\t"
+ "je %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "movq %[v], %%rbx\n\t"
+ "cmpq %%rbx, %[expectnot]\n\t"
+ "je %l[error2]\n\t"
+#endif
+ "movq %%rbx, %[load]\n\t"
+ "addq %[voffp], %%rbx\n\t"
+ "movq (%%rbx), %%rbx\n\t"
+ /* final store */
+ "movq %%rbx, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expectnot] "r" (expectnot),
+ [voffp] "er" (voffp),
+ [load] "m" (*load)
+ : "memory", "cc", "rax", "rbx"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_addv(intptr_t *v, intptr_t count, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+#endif
+ /* final store */
+ "addq %[count], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(4)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [count] "er" (count)
+ : "memory", "cc", "rax"
+ RSEQ_INJECT_CLOBBER
+ : abort
+#ifdef RSEQ_COMPARE_TWICE
+ , error1
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+#endif
+ /* try store */
+ "movq %[newv2], %[v2]\n\t"
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ "movq %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "rax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+/* x86-64 is TSO. */
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ return rseq_cmpeqv_trystorev_storev(v, expect, v2, newv2, newv, cpu);
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+ "cmpq %[v2], %[expect2]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(5)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+ "cmpq %[v2], %[expect2]\n\t"
+ "jnz %l[error3]\n\t"
+#endif
+ /* final store */
+ "movq %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* cmp2 input */
+ [v2] "m" (*v2),
+ [expect2] "r" (expect2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "rax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2, error3
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("1st expected value comparison failed");
+error3:
+ rseq_bug("2nd expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ uint64_t rseq_scratch[3];
+
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ "movq %[src], %[rseq_scratch0]\n\t"
+ "movq %[dst], %[rseq_scratch1]\n\t"
+ "movq %[len], %[rseq_scratch2]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpq %[v], %[expect]\n\t"
+ "jnz 5f\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
+ "cmpq %[v], %[expect]\n\t"
+ "jnz 7f\n\t"
+#endif
+ /* try memcpy */
+ "test %[len], %[len]\n\t" \
+ "jz 333f\n\t" \
+ "222:\n\t" \
+ "movb (%[src]), %%al\n\t" \
+ "movb %%al, (%[dst])\n\t" \
+ "inc %[src]\n\t" \
+ "inc %[dst]\n\t" \
+ "dec %[len]\n\t" \
+ "jnz 222b\n\t" \
+ "333:\n\t" \
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ "movq %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ "movq %[rseq_scratch2], %[len]\n\t"
+ "movq %[rseq_scratch1], %[dst]\n\t"
+ "movq %[rseq_scratch0], %[src]\n\t"
+ RSEQ_ASM_DEFINE_ABORT(4,
+ "movq %[rseq_scratch2], %[len]\n\t"
+ "movq %[rseq_scratch1], %[dst]\n\t"
+ "movq %[rseq_scratch0], %[src]\n\t",
+ abort)
+ RSEQ_ASM_DEFINE_CMPFAIL(5,
+ "movq %[rseq_scratch2], %[len]\n\t"
+ "movq %[rseq_scratch1], %[dst]\n\t"
+ "movq %[rseq_scratch0], %[src]\n\t",
+ cmpfail)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_DEFINE_CMPFAIL(6,
+ "movq %[rseq_scratch2], %[len]\n\t"
+ "movq %[rseq_scratch1], %[dst]\n\t"
+ "movq %[rseq_scratch0], %[src]\n\t",
+ error1)
+ RSEQ_ASM_DEFINE_CMPFAIL(7,
+ "movq %[rseq_scratch2], %[len]\n\t"
+ "movq %[rseq_scratch1], %[dst]\n\t"
+ "movq %[rseq_scratch0], %[src]\n\t",
+ error2)
+#endif
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len),
+ [rseq_scratch0] "m" (rseq_scratch[0]),
+ [rseq_scratch1] "m" (rseq_scratch[1]),
+ [rseq_scratch2] "m" (rseq_scratch[2])
+ : "memory", "cc", "rax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+/* x86-64 is TSO. */
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ return rseq_cmpeqv_trymemcpy_storev(v, expect, dst, src, len,
+ newv, cpu);
+}
+
+#endif /* !RSEQ_SKIP_FASTPATH */
+
+#elif __i386__
+
+#define rseq_smp_mb() \
+ __asm__ __volatile__ ("lock; addl $0,-128(%%esp)" ::: "memory", "cc")
+#define rseq_smp_rmb() \
+ __asm__ __volatile__ ("lock; addl $0,-128(%%esp)" ::: "memory", "cc")
+#define rseq_smp_wmb() \
+ __asm__ __volatile__ ("lock; addl $0,-128(%%esp)" ::: "memory", "cc")
+
+#define rseq_smp_load_acquire(p) \
+__extension__ ({ \
+ __typeof(*p) ____p1 = RSEQ_READ_ONCE(*p); \
+ rseq_smp_mb(); \
+ ____p1; \
+})
+
+#define rseq_smp_acquire__after_ctrl_dep() rseq_smp_rmb()
+
+#define rseq_smp_store_release(p, v) \
+do { \
+ rseq_smp_mb(); \
+ RSEQ_WRITE_ONCE(*p, v); \
+} while (0)
+
+#ifdef RSEQ_SKIP_FASTPATH
+#include "rseq-skip.h"
+#else /* !RSEQ_SKIP_FASTPATH */
+
+/*
+ * Use eax as scratch register and take memory operands as input to
+ * lessen register pressure. Especially needed when compiling in O0.
+ */
+#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, \
+ start_ip, post_commit_offset, abort_ip) \
+ ".pushsection __rseq_table, \"aw\"\n\t" \
+ ".balign 32\n\t" \
+ __rseq_str(label) ":\n\t" \
+ ".long " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ ".long " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) ", 0x0\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_DEFINE_TABLE(label, start_ip, post_commit_ip, abort_ip) \
+ __RSEQ_ASM_DEFINE_TABLE(label, 0x0, 0x0, start_ip, \
+ (post_commit_ip - start_ip), abort_ip)
+
+#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
+ RSEQ_INJECT_ASM(1) \
+ "movl $" __rseq_str(cs_label) ", %[rseq_cs]\n\t" \
+ __rseq_str(label) ":\n\t"
+
+#define RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, label) \
+ RSEQ_INJECT_ASM(2) \
+ "cmpl %[" __rseq_str(cpu_id) "], %[" __rseq_str(current_cpu_id) "]\n\t" \
+ "jnz " __rseq_str(label) "\n\t"
+
+#define RSEQ_ASM_DEFINE_ABORT(label, teardown, abort_label) \
+ ".pushsection __rseq_failure, \"ax\"\n\t" \
+ /* Disassembler-friendly signature: nopl <sig>. */ \
+ ".byte 0x0f, 0x1f, 0x05\n\t" \
+ ".long " __rseq_str(RSEQ_SIG) "\n\t" \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "jmp %l[" __rseq_str(abort_label) "]\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_DEFINE_CMPFAIL(label, teardown, cmpfail_label) \
+ ".pushsection __rseq_failure, \"ax\"\n\t" \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "jmp %l[" __rseq_str(cmpfail_label) "]\n\t" \
+ ".popsection\n\t"
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+#endif
+ /* final store */
+ "movl %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+/*
+ * Compare @v against @expectnot. When it does _not_ match, load @v
+ * into @load, and store the content of *@v + voffp into @v.
+ */
+static inline __attribute__((always_inline))
+int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "movl %[v], %%ebx\n\t"
+ "cmpl %%ebx, %[expectnot]\n\t"
+ "je %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "movl %[v], %%ebx\n\t"
+ "cmpl %%ebx, %[expectnot]\n\t"
+ "je %l[error2]\n\t"
+#endif
+ "movl %%ebx, %[load]\n\t"
+ "addl %[voffp], %%ebx\n\t"
+ "movl (%%ebx), %%ebx\n\t"
+ /* final store */
+ "movl %%ebx, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expectnot] "r" (expectnot),
+ [voffp] "ir" (voffp),
+ [load] "m" (*load)
+ : "memory", "cc", "eax", "ebx"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_addv(intptr_t *v, intptr_t count, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+#endif
+ /* final store */
+ "addl %[count], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(4)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [count] "ir" (count)
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort
+#ifdef RSEQ_COMPARE_TWICE
+ , error1
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+#endif
+ /* try store */
+ "movl %[newv2], %%eax\n\t"
+ "movl %%eax, %[v2]\n\t"
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ "movl %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "m" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "movl %[expect], %%eax\n\t"
+ "cmpl %[v], %%eax\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "movl %[expect], %%eax\n\t"
+ "cmpl %[v], %%eax\n\t"
+ "jnz %l[error2]\n\t"
+#endif
+ /* try store */
+ "movl %[newv2], %[v2]\n\t"
+ RSEQ_INJECT_ASM(5)
+ "lock; addl $0,-128(%%esp)\n\t"
+ /* final store */
+ "movl %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "m" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+ "cmpl %[expect2], %[v2]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(5)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+ "cmpl %[expect2], %[v2]\n\t"
+ "jnz %l[error3]\n\t"
+#endif
+ "movl %[newv], %%eax\n\t"
+ /* final store */
+ "movl %%eax, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* cmp2 input */
+ [v2] "m" (*v2),
+ [expect2] "r" (expect2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "m" (newv)
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2, error3
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("1st expected value comparison failed");
+error3:
+ rseq_bug("2nd expected value comparison failed");
+#endif
+}
+
+/* TODO: implement a faster memcpy. */
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ uint32_t rseq_scratch[3];
+
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ "movl %[src], %[rseq_scratch0]\n\t"
+ "movl %[dst], %[rseq_scratch1]\n\t"
+ "movl %[len], %[rseq_scratch2]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "movl %[expect], %%eax\n\t"
+ "cmpl %%eax, %[v]\n\t"
+ "jnz 5f\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
+ "movl %[expect], %%eax\n\t"
+ "cmpl %%eax, %[v]\n\t"
+ "jnz 7f\n\t"
+#endif
+ /* try memcpy */
+ "test %[len], %[len]\n\t" \
+ "jz 333f\n\t" \
+ "222:\n\t" \
+ "movb (%[src]), %%al\n\t" \
+ "movb %%al, (%[dst])\n\t" \
+ "inc %[src]\n\t" \
+ "inc %[dst]\n\t" \
+ "dec %[len]\n\t" \
+ "jnz 222b\n\t" \
+ "333:\n\t" \
+ RSEQ_INJECT_ASM(5)
+ "movl %[newv], %%eax\n\t"
+ /* final store */
+ "movl %%eax, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t"
+ RSEQ_ASM_DEFINE_ABORT(4,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ abort)
+ RSEQ_ASM_DEFINE_CMPFAIL(5,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ cmpfail)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_DEFINE_CMPFAIL(6,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ error1)
+ RSEQ_ASM_DEFINE_CMPFAIL(7,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ error2)
+#endif
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "m" (expect),
+ [newv] "m" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len),
+ [rseq_scratch0] "m" (rseq_scratch[0]),
+ [rseq_scratch1] "m" (rseq_scratch[1]),
+ [rseq_scratch2] "m" (rseq_scratch[2])
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+/* TODO: implement a faster memcpy. */
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ uint32_t rseq_scratch[3];
+
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ "movl %[src], %[rseq_scratch0]\n\t"
+ "movl %[dst], %[rseq_scratch1]\n\t"
+ "movl %[len], %[rseq_scratch2]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "movl %[expect], %%eax\n\t"
+ "cmpl %%eax, %[v]\n\t"
+ "jnz 5f\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
+ "movl %[expect], %%eax\n\t"
+ "cmpl %%eax, %[v]\n\t"
+ "jnz 7f\n\t"
+#endif
+ /* try memcpy */
+ "test %[len], %[len]\n\t" \
+ "jz 333f\n\t" \
+ "222:\n\t" \
+ "movb (%[src]), %%al\n\t" \
+ "movb %%al, (%[dst])\n\t" \
+ "inc %[src]\n\t" \
+ "inc %[dst]\n\t" \
+ "dec %[len]\n\t" \
+ "jnz 222b\n\t" \
+ "333:\n\t" \
+ RSEQ_INJECT_ASM(5)
+ "lock; addl $0,-128(%%esp)\n\t"
+ "movl %[newv], %%eax\n\t"
+ /* final store */
+ "movl %%eax, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t"
+ RSEQ_ASM_DEFINE_ABORT(4,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ abort)
+ RSEQ_ASM_DEFINE_CMPFAIL(5,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ cmpfail)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_DEFINE_CMPFAIL(6,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ error1)
+ RSEQ_ASM_DEFINE_CMPFAIL(7,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ error2)
+#endif
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "m" (expect),
+ [newv] "m" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len),
+ [rseq_scratch0] "m" (rseq_scratch[0]),
+ [rseq_scratch1] "m" (rseq_scratch[1]),
+ [rseq_scratch2] "m" (rseq_scratch[2])
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+#endif /* !RSEQ_SKIP_FASTPATH */
+
+#endif
diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
new file mode 100644
index 000000000000..4847e97ed049
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq.c
@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * rseq.c
+ *
+ * Copyright (C) 2016 Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ */
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <syscall.h>
+#include <assert.h>
+#include <signal.h>
+
+#include "rseq.h"
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+__attribute__((tls_model("initial-exec"))) __thread
+volatile struct rseq __rseq_abi = {
+ .cpu_id = RSEQ_CPU_ID_UNINITIALIZED,
+};
+
+static __attribute__((tls_model("initial-exec"))) __thread
+volatile int refcount;
+
+static void signal_off_save(sigset_t *oldset)
+{
+ sigset_t set;
+ int ret;
+
+ sigfillset(&set);
+ ret = pthread_sigmask(SIG_BLOCK, &set, oldset);
+ if (ret)
+ abort();
+}
+
+static void signal_restore(sigset_t oldset)
+{
+ int ret;
+
+ ret = pthread_sigmask(SIG_SETMASK, &oldset, NULL);
+ if (ret)
+ abort();
+}
+
+static int sys_rseq(volatile struct rseq *rseq_abi, uint32_t rseq_len,
+ int flags, uint32_t sig)
+{
+ return syscall(__NR_rseq, rseq_abi, rseq_len, flags, sig);
+}
+
+int rseq_register_current_thread(void)
+{
+ int rc, ret = 0;
+ sigset_t oldset;
+
+ signal_off_save(&oldset);
+ if (refcount++)
+ goto end;
+ rc = sys_rseq(&__rseq_abi, sizeof(struct rseq), 0, RSEQ_SIG);
+ if (!rc) {
+ assert(rseq_current_cpu_raw() >= 0);
+ goto end;
+ }
+ if (errno != EBUSY)
+ __rseq_abi.cpu_id = -2;
+ ret = -1;
+ refcount--;
+end:
+ signal_restore(oldset);
+ return ret;
+}
+
+int rseq_unregister_current_thread(void)
+{
+ int rc, ret = 0;
+ sigset_t oldset;
+
+ signal_off_save(&oldset);
+ if (--refcount)
+ goto end;
+ rc = sys_rseq(&__rseq_abi, sizeof(struct rseq),
+ RSEQ_FLAG_UNREGISTER, RSEQ_SIG);
+ if (!rc)
+ goto end;
+ ret = -1;
+end:
+ signal_restore(oldset);
+ return ret;
+}
+
+int32_t rseq_fallback_current_cpu(void)
+{
+ int32_t cpu;
+
+ cpu = sched_getcpu();
+ if (cpu < 0) {
+ perror("sched_getcpu()");
+ abort();
+ }
+ return cpu;
+}
diff --git a/tools/testing/selftests/rseq/rseq.h b/tools/testing/selftests/rseq/rseq.h
new file mode 100644
index 000000000000..0a808575cbc4
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq.h
@@ -0,0 +1,147 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * rseq.h
+ *
+ * (C) Copyright 2016-2018 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ */
+
+#ifndef RSEQ_H
+#define RSEQ_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <pthread.h>
+#include <signal.h>
+#include <sched.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sched.h>
+#include <linux/rseq.h>
+
+/*
+ * Empty code injection macros, override when testing.
+ * It is important to consider that the ASM injection macros need to be
+ * fully reentrant (e.g. do not modify the stack).
+ */
+#ifndef RSEQ_INJECT_ASM
+#define RSEQ_INJECT_ASM(n)
+#endif
+
+#ifndef RSEQ_INJECT_C
+#define RSEQ_INJECT_C(n)
+#endif
+
+#ifndef RSEQ_INJECT_INPUT
+#define RSEQ_INJECT_INPUT
+#endif
+
+#ifndef RSEQ_INJECT_CLOBBER
+#define RSEQ_INJECT_CLOBBER
+#endif
+
+#ifndef RSEQ_INJECT_FAILED
+#define RSEQ_INJECT_FAILED
+#endif
+
+extern __thread volatile struct rseq __rseq_abi;
+
+#define rseq_likely(x) __builtin_expect(!!(x), 1)
+#define rseq_unlikely(x) __builtin_expect(!!(x), 0)
+#define rseq_barrier() __asm__ __volatile__("" : : : "memory")
+
+#define RSEQ_ACCESS_ONCE(x) (*(__volatile__ __typeof__(x) *)&(x))
+#define RSEQ_WRITE_ONCE(x, v) __extension__ ({ RSEQ_ACCESS_ONCE(x) = (v); })
+#define RSEQ_READ_ONCE(x) RSEQ_ACCESS_ONCE(x)
+
+#define __rseq_str_1(x) #x
+#define __rseq_str(x) __rseq_str_1(x)
+
+#define rseq_log(fmt, args...) \
+ fprintf(stderr, fmt "(in %s() at " __FILE__ ":" __rseq_str(__LINE__)"\n", \
+ ## args, __func__)
+
+#define rseq_bug(fmt, args...) \
+ do { \
+ rseq_log(fmt, ##args); \
+ abort(); \
+ } while (0)
+
+#if defined(__x86_64__) || defined(__i386__)
+#include <rseq-x86.h>
+#elif defined(__ARMEL__)
+#include <rseq-arm.h>
+#elif defined(__PPC__)
+#include <rseq-ppc.h>
+#else
+#error unsupported target
+#endif
+
+/*
+ * Register rseq for the current thread. This needs to be called once
+ * by any thread which uses restartable sequences, before they start
+ * using restartable sequences, to ensure restartable sequences
+ * succeed. A restartable sequence executed from a non-registered
+ * thread will always fail.
+ */
+int rseq_register_current_thread(void);
+
+/*
+ * Unregister rseq for current thread.
+ */
+int rseq_unregister_current_thread(void);
+
+/*
+ * Restartable sequence fallback for reading the current CPU number.
+ */
+int32_t rseq_fallback_current_cpu(void);
+
+/*
+ * Values returned can be either the current CPU number, -1 (rseq is
+ * uninitialized), or -2 (rseq initialization has failed).
+ */
+static inline int32_t rseq_current_cpu_raw(void)
+{
+ return RSEQ_ACCESS_ONCE(__rseq_abi.cpu_id);
+}
+
+/*
+ * Returns a possible CPU number, which is typically the current CPU.
+ * The returned CPU number can be used to prepare for an rseq critical
+ * section, which will confirm whether the cpu number is indeed the
+ * current one, and whether rseq is initialized.
+ *
+ * The CPU number returned by rseq_cpu_start should always be validated
+ * by passing it to a rseq asm sequence, or by comparing it to the
+ * return value of rseq_current_cpu_raw() if the rseq asm sequence
+ * does not need to be invoked.
+ */
+static inline uint32_t rseq_cpu_start(void)
+{
+ return RSEQ_ACCESS_ONCE(__rseq_abi.cpu_id_start);
+}
+
+static inline uint32_t rseq_current_cpu(void)
+{
+ int32_t cpu;
+
+ cpu = rseq_current_cpu_raw();
+ if (rseq_unlikely(cpu < 0))
+ cpu = rseq_fallback_current_cpu();
+ return cpu;
+}
+
+/*
+ * rseq_prepare_unload() should be invoked by each thread using rseq_finish*()
+ * at least once between their last rseq_finish*() and library unload of the
+ * library defining the rseq critical section (struct rseq_cs). This also
+ * applies to use of rseq in code generated by JIT: rseq_prepare_unload()
+ * should be invoked at least once by each thread using rseq_finish*() before
+ * reclaim of the memory holding the struct rseq_cs.
+ */
+static inline void rseq_prepare_unload(void)
+{
+ __rseq_abi.rseq_cs = 0;
+}
+
+#endif /* RSEQ_H_ */
--
2.11.0
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7 years
- 1
- 0
[PATCH 09/14] selftests: lib.mk: Introduce OVERRIDE_TARGETS
by Mathieu Desnoyers
Introduce OVERRIDE_TARGETS to allow tests to express dependencies on
header files and .so, which require to override the selftests lib.mk
targets.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
Acked-by: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
tools/testing/selftests/lib.mk | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 195e9d4739a9..9fd57efae439 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -106,6 +106,9 @@ COMPILE.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
LINK.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
endif
+# Selftest makefiles can override those targets by setting
+# OVERRIDE_TARGETS = 1.
+ifeq ($(OVERRIDE_TARGETS),)
$(OUTPUT)/%:%.c
$(LINK.c) $^ $(LDLIBS) -o $@
@@ -114,5 +117,6 @@ $(OUTPUT)/%.o:%.S
$(OUTPUT)/%:%.S
$(LINK.S) $^ $(LDLIBS) -o $@
+endif
.PHONY: run_tests all clean install emit_tests
--
2.11.0
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7 years
- 1
- 0
kselftest archives etc.
by Randy Dunlap
Hi,
I was having trouble with the use of the gcc -no-pie option in
tools/testing/selftests/x86: (option not supported)
CFLAGS := -O2 -g -std=gnu99 -pthread -Wall -no-pie
so I looked for an archive of linux-kselftest(a)vger.kernel.org.
http://vger.kernel.org/vger-lists.html lists all mailing lists and
(some of) their archives, but none for linux-kselftest.
Anyway, I checked www.spinics.net for an archive and there it was.
(1) Is it OK to ask DaveM to list http://www.spinics.net/lists/linux-kselftest/
at http://vger.kernel.org/vger-lists.html#linux-kselftest ?
(2) for this patch: http://www.spinics.net/lists/linux-kselftest/msg03136.html
[PATCH] selftests/x86: Detect -no-pie availability
Acked-by: Randy Dunlap <rdunlap(a)infradead.org>
Tested-by: Randy Dunlap <rdunlap(a)infradead.org>
What is the status of this patch?
thanks,
--
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7 years
- 4
- 5
[PATCH] kselftests: fix grammar and non-ASCII space
by Randy Dunlap
From: Randy Dunlap <rdunlap(a)infradead.org>
This is a small cleanup to kselftest.rst:
- Fix some language typos in the usage instructions.
- Change one non-ASCII space to an ASCII space.
Signed-off-by: Randy Dunlap <rdunlap(a)infradead.org>
---
Documentation/dev-tools/kselftest.rst | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--- linux-next-20180426.orig/Documentation/dev-tools/kselftest.rst
+++ linux-next-20180426/Documentation/dev-tools/kselftest.rst
@@ -9,7 +9,7 @@ and booting a kernel.
On some systems, hot-plug tests could hang forever waiting for cpu and
memory to be ready to be offlined. A special hot-plug target is created
-to run full range of hot-plug tests. In default mode, hot-plug tests run
+to run the full range of hot-plug tests. In default mode, hot-plug tests run
in safe mode with a limited scope. In limited mode, cpu-hotplug test is
run on a single cpu as opposed to all hotplug capable cpus, and memory
hotplug test is run on 2% of hotplug capable memory instead of 10%.
@@ -89,9 +89,9 @@ Note that some tests will require root p
Install selftests
=================
-You can use kselftest_install.sh tool installs selftests in default
-location which is tools/testing/selftests/kselftest or a user specified
-location.
+You can use the kselftest_install.sh tool to install selftests in the
+default location, which is tools/testing/selftests/kselftest, or in a
+user specified location.
To install selftests in default location::
@@ -109,7 +109,7 @@ Running installed selftests
Kselftest install as well as the Kselftest tarball provide a script
named "run_kselftest.sh" to run the tests.
-You can simply do the following to run the installed Kselftests. Please
+You can simply do the following to run the installed Kselftests. Please
note some tests will require root privileges::
$ cd kselftest
@@ -139,7 +139,7 @@ Contributing new tests (details)
default.
TEST_CUSTOM_PROGS should be used by tests that require custom build
- rule and prevent common build rule use.
+ rules and prevent common build rule use.
TEST_PROGS are for test shell scripts. Please ensure shell script has
its exec bit set. Otherwise, lib.mk run_tests will generate a warning.
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7 years
- 1
- 0
[PATCH] doc: dev-tools: kselftest.rst: update contributing new tests
by Anders Roxell
Add a description that the kernel headers should be used as far as it is
possible and then the system headers.
Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org>
---
Documentation/dev-tools/kselftest.rst | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Documentation/dev-tools/kselftest.rst b/Documentation/dev-tools/kselftest.rst
index e80850eefe13..27f08d6ba91c 100644
--- a/Documentation/dev-tools/kselftest.rst
+++ b/Documentation/dev-tools/kselftest.rst
@@ -151,6 +151,9 @@ Contributing new tests (details)
TEST_FILES, TEST_GEN_FILES mean it is the file which is used by
test.
+ * First use the headers inside the kernel, and then the system headers. The
+ internal headers should be the primary focus to be able to find regressions.
+
Test Harness
============
--
2.11.0
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7 years
- 3
- 4
[PATCH 4.17-rc2] selftests: Fix lib.mk run_tests target shell script
by Mathieu Desnoyers
Within run_tests target, the whole script needs to be executed within
the same shell and not as separate subshells, so the initial test_num
variable set to 0 is still present when executing "test_num=`echo
$$test_num+1 | bc`;".
Demonstration of the issue (make run_tests):
TAP version 13
(standard_in) 1: syntax error
selftests: basic_test
========================================
ok 1.. selftests: basic_test [PASS]
(standard_in) 1: syntax error
selftests: basic_percpu_ops_test
========================================
ok 1.. selftests: basic_percpu_ops_test [PASS]
(standard_in) 1: syntax error
selftests: param_test
========================================
ok 1.. selftests: param_test [PASS]
With fix applied:
TAP version 13
selftests: basic_test
========================================
ok 1..1 selftests: basic_test [PASS]
selftests: basic_percpu_ops_test
========================================
ok 1..2 selftests: basic_percpu_ops_test [PASS]
selftests: param_test
========================================
ok 1..3 selftests: param_test [PASS]
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
Fixes: 1f87c7c15d7 ("selftests: lib.mk: change RUN_TESTS to print messages in TAP13 format")
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: linux-kselftest(a)vger.kernel.org
---
tools/testing/selftests/lib.mk | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 195e9d4739a9..c1b1a4dc6a96 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -20,10 +20,10 @@ all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
.ONESHELL:
define RUN_TESTS
- @export KSFT_TAP_LEVEL=`echo 1`;
- @test_num=`echo 0`;
- @echo "TAP version 13";
- @for TEST in $(1); do \
+ @export KSFT_TAP_LEVEL=`echo 1`; \
+ test_num=`echo 0`; \
+ echo "TAP version 13"; \
+ for TEST in $(1); do \
BASENAME_TEST=`basename $$TEST`; \
test_num=`echo $$test_num+1 | bc`; \
echo "selftests: $$BASENAME_TEST"; \
--
2.11.0
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7 years
- 2
- 1
Re: [PATCH 1/1] selftests: Fix lib.mk run_tests target shell script
by Mathieu Desnoyers
----- On Nov 1, 2017, at 6:28 PM, Shuah Khan shuahkh(a)osg.samsung.com wrote:
> On 11/01/2017 04:24 PM, Mathieu Desnoyers wrote:
>> ----- On Nov 1, 2017, at 6:22 PM, Mathieu Desnoyers
>> mathieu.desnoyers(a)efficios.com wrote:
>>
>>> ----- On Nov 1, 2017, at 5:33 PM, Shuah Khan shuahkh(a)osg.samsung.com wrote:
>>>
>>>> On 10/28/2017 07:46 AM, Mathieu Desnoyers wrote:
>>>>> Within run_tests target, the whole script needs to be executed within
>>>>> the same shell and not as separate subshells, so the initial test_num
>>>>> variable set to 0 is still present when executing "test_num=`echo
>>>>> $$test_num+1 | bc`;".
>>>>>
>>>>> Demonstration of the issue (make run_tests):
>>>>>
>>>>> TAP version 13
>>>>> (standard_in) 1: syntax error
>>>>> selftests: basic_test
>>>>> ========================================
>>>>> ok 1.. selftests: basic_test [PASS]
>>>>> (standard_in) 1: syntax error
>>>>> selftests: basic_percpu_ops_test
>>>>> ========================================
>>>>> ok 1.. selftests: basic_percpu_ops_test [PASS]
>>>>> (standard_in) 1: syntax error
>>>>> selftests: param_test
>>>>> ========================================
>>>>> ok 1.. selftests: param_test [PASS]
>>>>
>>>> Hi Mathieu,
>>>>
>>>> Odd. I don't see the error. I am curious if this specific to
>>>> env. Can you reproduce this with one of the existing tests,
>>>> kcmp or breakpoints
>>>
>>> Yes, it reproduces:
>>>
>>> cd tools/testing/selftests/kcmp
>>> make run_tests
>>> gcc -I../../../../usr/include/ kcmp_test.c -o
>>> /home/efficios/git/linux-rseq/tools/testing/selftests/kcmp/kcmp_test
>>> TAP version 13
>>> (standard_in) 1: syntax error
>>> selftests: kcmp_test
>>> ========================================
>>> ok 1.. selftests: kcmp_test [PASS]
>>>
>>> cd tools/testing/selftests/breakpoints
>>> make run_tests
>>> gcc step_after_suspend_test.c -o
>>> /home/efficios/git/linux-rseq/tools/testing/selftests/breakpoints/step_after_suspend_test
>>> gcc breakpoint_test.c -o
>>> /home/efficios/git/linux-rseq/tools/testing/selftests/breakpoints/breakpoint_test
>>> TAP version 13
>>> (standard_in) 1: syntax error
>>> selftests: step_after_suspend_test
>>> ========================================
>>> not ok 1.. selftests: step_after_suspend_test [FAIL]
>>> (standard_in) 1: syntax error
>>> selftests: breakpoint_test
>>> ========================================
>>> ok 1.. selftests: breakpoint_test [PASS]
>>>
>>
>> The version of "make" on that machine is:
>>
>> make --version
>> GNU Make 3.81
>> Copyright (C) 2006 Free Software Foundation, Inc.
>> This is free software; see the source for copying conditions.
>> There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
>> PARTICULAR PURPOSE.
>>
>> This program built for x86_64-pc-linux-gnu
>>
>> (if it helps reproducing)
>>
>
> Yup that's it. I have
>
> GNU Make 4.1
> Built for x86_64-pc-linux-gnu
> Copyright (C) 1988-2014 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.
>
> I will test with your patch and see what happens in my env.
Hi,
I still see the problem with v4.17-rc2. Did you have time to
consider merging my fix ?
Thanks,
Mathieu
>
> thanks,
> -- Shuah
--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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7 years
- 2
- 4
[PATCH] selftests: net: add in_netns.sh TEST_GEN_PROGS_EXTENDED
by Anders Roxell
Script in_netns.sh is a utility function and not its own test so it
shouldn't be part of the TEST_PROGS. The in_netns.sh get used by
run_afpackettests.
To install in_netns.sh without being added to the main run_kselftest.sh
script use the TEST_GEN_PROGS_EXTENDED variable.
Fixes: 5ff9c1a3dd92 ("selftests: net: add in_netns.sh to TEST_PROGS")
Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org>
---
tools/testing/selftests/net/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index c3761c35f542..4a8cfe8071a7 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -5,7 +5,8 @@ CFLAGS = -Wall -Wl,--no-as-needed -O2 -g
CFLAGS += -I../../../../usr/include/
TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh rtnetlink.sh
-TEST_PROGS += fib_tests.sh fib-onlink-tests.sh in_netns.sh pmtu.sh
+TEST_PROGS += fib_tests.sh fib-onlink-tests.sh pmtu.sh
+TEST_GEN_PROGS_EXTENDED := in_netns.sh
TEST_GEN_FILES = socket
TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy
TEST_GEN_FILES += tcp_mmap
--
2.11.0
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7 years
- 2
- 3
possible BUG: selftest about raw_skew failed
by Jeffrin Thalakkottoor
hello,
failure of a test in selftest:timers
selftests: raw_skew
========================================
WARNING: ADJ_OFFSET in progress, this will cause inaccurate results
Estimating clock drift: 17.910(est) 16.820(act) [FAILED]
Bail out!
Pass 0 Fail 0 Xfail 0 Xpass 0 Skip 0 Error 0
1..0
not ok 1..7 selftests: raw_skew [FAIL]
To reproduce :
make -C tools/testing/selftests/timers/ run_tests
Linux debian 4.17.0-rc1+ #3 SMP Sat Apr 21 03:41:44 IST 2018 x86_64 GNU/Linux
GNU Make 4.2.1
Binutils 2.30
Util-linux 2.31.1
Mount 2.31.1
Linux C Library 2.27
Dynamic linker (ldd) 2.27
readlink: missing operand
Try 'readlink --help' for more information.
Procps 3.3.14
Kbd 2.0.4
Console-tools 2.0.4
Sh-utils 8.28
Udev 238
--
software engineer
rajagiri school of engineering and technology
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7 years
- 4
- 5
selftests: pstore_tests failed
by Naresh Kamboju
pstore_tests failed on x86_64 device.
This test pass at your end ? If yes, what are pre-requirements ?
Linux kernel version: 4.17.0-rc1
+ ./pstore_tests
=== Pstore unit tests (pstore_tests) ===
UUID=ffa28670-e941-478a-a3c0-2fdad1df8195
Checking pstore backend is registered ... ok
backend=(null)
cmdline=root=/dev/nfs rw nfsroot=10.66.16.116:
/var/lib/lava/dispatcher/tmp/198332/extract-nfsrootfs-yqsi5ya0,tcp,hard,intr
backend=ramoops ramoops.mem_address=0x30000000 ramoops.mem_size=0x10000 ip=dhcp
console=ttyS0,115200n8 lava_mac={LAVA_MAC}
Checking pstore console is registered ... FAIL
Checking /dev/pmsg0 exists ... FAIL
Writing unique string to /dev/pmsg0 ... FAIL
Following config enabled,
CONFIG_EFI_VARS_PSTORE=y
CONFIG_PSTORE=y
CONFIG_PSTORE_DEFLATE_COMPRESS=y
ONFIG_PSTORE_COMPRESS=y
CONFIG_PSTORE_DEFLATE_COMPRESS_DEFAULT=y
CONFIG_PSTORE_COMPRESS_DEFAULT="deflate"
CONFIG_PSTORE_CONSOLE=y
CONFIG_PSTORE_PMSG=y
CONFIG_PSTORE_RAM=m
Please suggest a way to get this working.
Complete boot log and test details link,
https://lkft.validation.linaro.org/scheduler/job/198332#L230
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7 years
- 2
- 1
[PATCH v5 0/2] sparc64: Add privileged ADI driver
by Tom Hromatka
ADI is a feature supported on SPARC M7 and newer processors to allow
hardware to catch rogue accesses to memory. ADI is supported for data
fetches only and not instruction fetches. An app can enable ADI on its
data pages, set version tags on them and use versioned addresses to
access the data pages. Upper bits of the address contain the version
tag. On M7 processors, upper four bits (bits 63-60) contain the version
tag. If a rogue app attempts to access ADI enabled data pages, its
access is blocked and processor generates an exception. Please see
Documentation/sparc/adi.txt for further details.
This patchset implements a char driver to read/write ADI versions from
privileged user space processes. Intended consumers are makedumpfile
and crash.
v5:
* Fixed MODULE_LICENSE() for adi.c
v4:
* Fixed messed up subject lines.
v3:
* Really fixed the copyright headers to use SPDX GPL v2. Really.
v2:
* Simplified copyright headers
* Completely reworked sparc64 selftests Makefiles. Used the
android selftests Makefiles as an example
* Added run.sh and drivers_test.sh to the sparc64 selftest
directory. Used bpf/test_kmod.sh and the android selftests
as examples
* Minor cleanups in the selftest adi-test.c
* Added calls to ksft_test_*() in the adi-test.c
Tom Hromatka (2):
char: sparc64: Add privileged ADI driver
selftests: sparc64: char: Selftest for privileged ADI driver
drivers/char/Kconfig | 12 +
drivers/char/Makefile | 1 +
drivers/char/adi.c | 240 +++++++
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/sparc64/Makefile | 46 ++
tools/testing/selftests/sparc64/drivers/.gitignore | 1 +
tools/testing/selftests/sparc64/drivers/Makefile | 15 +
tools/testing/selftests/sparc64/drivers/adi-test.c | 721 +++++++++++++++++++++
.../selftests/sparc64/drivers/drivers_test.sh | 30 +
tools/testing/selftests/sparc64/run.sh | 3 +
10 files changed, 1070 insertions(+)
create mode 100644 drivers/char/adi.c
create mode 100644 tools/testing/selftests/sparc64/Makefile
create mode 100644 tools/testing/selftests/sparc64/drivers/.gitignore
create mode 100644 tools/testing/selftests/sparc64/drivers/Makefile
create mode 100644 tools/testing/selftests/sparc64/drivers/adi-test.c
create mode 100755 tools/testing/selftests/sparc64/drivers/drivers_test.sh
create mode 100755 tools/testing/selftests/sparc64/run.sh
--
2.15.0
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7 years
- 3
- 6
Re: [PATCH] selftests:firmware: fixes a call to a wrong function name
by Kees Cook
On Mon, Apr 23, 2018 at 7:10 AM, Jeffrin Jose T <ahiliation(a)yahoo.co.in> wrote:
> This is a patch to the tools/testing/selftests/firmware/fw_run_tests.sh
> file which fixes a bug which calls to a wrong function name,which in turn
> blocks the execution of certain tests.
>
> Signed-off-by: Jeffrin Jose T <jeffrin(a)rajagiritech.edu.in>
>
> ---
> tools/testing/selftests/firmware/fw_run_tests.sh | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/firmware/fw_run_tests.sh b/tools/testing/selftests/firmware/fw_run_tests.sh
> index 06d638e9dc62..cffdd4eb0a57 100755
> --- a/tools/testing/selftests/firmware/fw_run_tests.sh
> +++ b/tools/testing/selftests/firmware/fw_run_tests.sh
> @@ -66,5 +66,5 @@ if [ -f $FW_FORCE_SYSFS_FALLBACK ]; then
> run_test_config_0003
> else
> echo "Running basic kernel configuration, working with your config"
> - run_test
> + run_tests
> fi
I find it confusing that run_tests() uses $1 and $2 but later ignores
them unless -f $FW_FORCE_SYSFS_FALLBACK, which is checked at both the
top level and in proc_set_*_fallback()... I'd expected the test to
happen only in run_tests() and have it removed from from
proc_set_*_fallback().
Regardless, the above patch is correct to run the tests. :)
Acked-by: Kees Cook <keescook(a)chromium.org>
-Kees
--
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Pixel Security
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7 years
- 3
- 2
[PATCH] selftests: bpf: update .gitignore with missing file
by Anders Roxell
Fixes: c0fa1b6c3efc ("bpf: btf: Add BTF tests")
Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org>
---
tools/testing/selftests/bpf/.gitignore | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore
index 5e1ab2f0eb79..3e3b3ced3f7c 100644
--- a/tools/testing/selftests/bpf/.gitignore
+++ b/tools/testing/selftests/bpf/.gitignore
@@ -15,3 +15,4 @@ test_libbpf_open
test_sock
test_sock_addr
urandom_read
+test_btf
--
2.17.0
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7 years
- 2
- 5
[PATCH v3] Add livepatch kselftests
by Joe Lawrence
Tests run on top of Petr's v11 atomic replace feature and v2 of the shadow
variable enhancement patchsets:
[PATCH 0/8] livepatch: Atomic replace feature
https://lkml.kernel.org/r/20180323120028.31451-1-pmladek@suse.com
[PATCH v2 0/2] livepatch: Allocate and free shadow variables more safely
https://lkml.kernel.org/r/20180405122315.29065-1-pmladek@suse.com
which have been combined into a git tree, then branched:
https://github.com/joe-lawrence/linux/tree/klp_kselftest_base
https://github.com/joe-lawrence/linux/tree/klp_kselftest_v3
so that the kbuild test robot could verify:
Subject: [joe-lawrence:klp_kselftest_v3] BUILD SUCCESS 73f12d67f681e3517a8cdc12ceec07b05543d269
From: kbuild test robot <lkp(a)intel.com>
To: Joe Lawrence <joe.lawrence(a)redhat.com>
tree/branch: https://github.com/joe-lawrence/linux klp_kselftest_v3
branch HEAD: 73f12d67f681e3517a8cdc12ceec07b05543d269 selftests/livepatch: introduce tests
elapsed time: 95m
configs tested: 202
[ ... snip ... ]
If anyone knows how to indicate an external git tree base to the bot in
the commit message or header letter, let me know. Otherwise I'll have
to keep pushing up to github and ignoring its misfires as reported to
the list :(
changes from v2:
- fix module_exit(test_klp_shadow_vars_exit) in test_klp_shadow_vars.c
- silence kbuild test robot's "XXX can be static" and "Using plain
integer as NULL pointer" complaints
- re-run tests with CONFIG_LOCKDEP=y and CONFIG_PROVE_LOCKING=y
- use GFP_ATOMIC in test_klp_shadow_vars.c constructor code
changes from v1:
- Only add $(CC_FLAGS_FTRACE) for target modules
- Remove between test delay
- Reduce RETRY_INTERVAL to .1 sec
- Reduce test_callback_mod's busymod_work_func delay from 60 to 10 sec
- s/PASS/ok and s/FAIL/not ok for test output
- Move test descriptions from Documentation/livepatch/callbacks.txt
into tools/testing/selftests/livepatch/test-callbacks.sh
- Add a shadow variable test script and module
- Add a short tools/testing/selftests/livepatch/README
- to += linux-kselftest(a)vger.kernel.org
- cc += Libor, Nicolai, Artem
change from rfc:
- SPDX-License-Identifiers
- Moved livepatch test modules into lib/livepatch
- Renamed livepatch.sh (filename suffix)
- Reduced between-test delay time
- Split off common functions.sh file
- Split into separate livepatch, callbacks, and shadow-vars scrips
- Gave the tests short descriptions instead of TEST1, TEST2, etc.
Joe Lawrence (1):
selftests/livepatch: introduce tests
Documentation/livepatch/callbacks.txt | 487 -----------------
lib/Kconfig.debug | 12 +
lib/Makefile | 2 +
lib/livepatch/Makefile | 15 +
lib/livepatch/test_klp_atomic_replace.c | 69 +++
lib/livepatch/test_klp_callbacks_busy.c | 43 ++
lib/livepatch/test_klp_callbacks_demo.c | 132 +++++
lib/livepatch/test_klp_callbacks_demo2.c | 104 ++++
lib/livepatch/test_klp_callbacks_mod.c | 24 +
lib/livepatch/test_klp_livepatch.c | 62 +++
lib/livepatch/test_klp_shadow_vars.c | 236 ++++++++
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/livepatch/Makefile | 8 +
tools/testing/selftests/livepatch/README | 43 ++
tools/testing/selftests/livepatch/config | 1 +
tools/testing/selftests/livepatch/functions.sh | 196 +++++++
.../testing/selftests/livepatch/test-callbacks.sh | 607 +++++++++++++++++++++
.../testing/selftests/livepatch/test-livepatch.sh | 173 ++++++
.../selftests/livepatch/test-shadow-vars.sh | 60 ++
19 files changed, 1788 insertions(+), 487 deletions(-)
create mode 100644 lib/livepatch/Makefile
create mode 100644 lib/livepatch/test_klp_atomic_replace.c
create mode 100644 lib/livepatch/test_klp_callbacks_busy.c
create mode 100644 lib/livepatch/test_klp_callbacks_demo.c
create mode 100644 lib/livepatch/test_klp_callbacks_demo2.c
create mode 100644 lib/livepatch/test_klp_callbacks_mod.c
create mode 100644 lib/livepatch/test_klp_livepatch.c
create mode 100644 lib/livepatch/test_klp_shadow_vars.c
create mode 100644 tools/testing/selftests/livepatch/Makefile
create mode 100644 tools/testing/selftests/livepatch/README
create mode 100644 tools/testing/selftests/livepatch/config
create mode 100644 tools/testing/selftests/livepatch/functions.sh
create mode 100755 tools/testing/selftests/livepatch/test-callbacks.sh
create mode 100755 tools/testing/selftests/livepatch/test-livepatch.sh
create mode 100755 tools/testing/selftests/livepatch/test-shadow-vars.sh
--
1.8.3.1
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7 years
- 6
- 14
[PATCH] selftests: net: update .gitignore with missing test
by Anders Roxell
Fixes: 192dc405f308 ("selftests: net: add tcp_mmap program")
Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org>
---
tools/testing/selftests/net/.gitignore | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/net/.gitignore b/tools/testing/selftests/net/.gitignore
index c612d6e38c62..5559f6add046 100644
--- a/tools/testing/selftests/net/.gitignore
+++ b/tools/testing/selftests/net/.gitignore
@@ -7,3 +7,4 @@ reuseport_bpf_cpu
reuseport_bpf_numa
reuseport_dualstack
reuseaddr_conflict
+tcp_mmap
--
2.17.0
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7 years
- 2
- 1
[PATCH driver-core 1/2] test_firmware: Install all scripts
by Ben Hutchings
List all the scripts invoked by fw_run_tests.sh, so that
"make TARGETS=firmware install" keeps working.
Fixes: 29a1c00ce1df8 ("test_firmware: add simple firmware firmware test ...")
Fixes: b3cf21fae1fe0 ("test_firmware: test three firmware kernel configs ...")
Signed-off-by: Ben Hutchings <ben.hutchings(a)codethink.co.uk>
---
tools/testing/selftests/firmware/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/firmware/Makefile b/tools/testing/selftests/firmware/Makefile
index 826f38d5dd19..261c81f08606 100644
--- a/tools/testing/selftests/firmware/Makefile
+++ b/tools/testing/selftests/firmware/Makefile
@@ -4,6 +4,7 @@
all:
TEST_PROGS := fw_run_tests.sh
+TEST_FILES := fw_fallback.sh fw_filesystem.sh fw_lib.sh
include ../lib.mk
--
2.16.2
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7 years
- 3
- 4
[PATCH v4 0/2] sparc64: Add privileged ADI driver
by Tom Hromatka
ADI is a feature supported on SPARC M7 and newer processors to allow
hardware to catch rogue accesses to memory. ADI is supported for data
fetches only and not instruction fetches. An app can enable ADI on its
data pages, set version tags on them and use versioned addresses to
access the data pages. Upper bits of the address contain the version
tag. On M7 processors, upper four bits (bits 63-60) contain the version
tag. If a rogue app attempts to access ADI enabled data pages, its
access is blocked and processor generates an exception. Please see
Documentation/sparc/adi.txt for further details.
This patchset implements a char driver to read/write ADI versions from
privileged user space processes. Intended consumers are makedumpfile
and crash.
v4:
* Fixed messed up subject lines.
v3:
* Really fixed the copyright headers to use SPDX GPL v2. Really.
v2:
* Simplified copyright headers
* Completely reworked sparc64 selftests Makefiles. Used the
android selftests Makefiles as an example
* Added run.sh and drivers_test.sh to the sparc64 selftest
directory. Used bpf/test_kmod.sh and the android selftests
as examples
* Minor cleanups in the selftest adi-test.c
* Added calls to ksft_test_*() in the adi-test.c
Tom Hromatka (2):
char: sparc64: Add privileged ADI driver
selftests: sparc64: char: Selftest for privileged ADI driver
drivers/char/Kconfig | 12 +
drivers/char/Makefile | 1 +
drivers/char/adi.c | 240 +++++++
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/sparc64/Makefile | 46 ++
tools/testing/selftests/sparc64/drivers/.gitignore | 1 +
tools/testing/selftests/sparc64/drivers/Makefile | 15 +
tools/testing/selftests/sparc64/drivers/adi-test.c | 721 +++++++++++++++++++++
.../selftests/sparc64/drivers/drivers_test.sh | 30 +
tools/testing/selftests/sparc64/run.sh | 3 +
10 files changed, 1070 insertions(+)
create mode 100644 drivers/char/adi.c
create mode 100644 tools/testing/selftests/sparc64/Makefile
create mode 100644 tools/testing/selftests/sparc64/drivers/.gitignore
create mode 100644 tools/testing/selftests/sparc64/drivers/Makefile
create mode 100644 tools/testing/selftests/sparc64/drivers/adi-test.c
create mode 100755 tools/testing/selftests/sparc64/drivers/drivers_test.sh
create mode 100755 tools/testing/selftests/sparc64/run.sh
--
2.15.0
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7 years
- 2
- 4
Re: possible BUG: selftests: proc-loadavg-001 failed during kernel testing
by Jeffrin Thalakkottoor
This problem is fixed now.
$sudo make -C tools/testing/selftests/proc run_tests
[sudo] password for jeffrin:
make: Entering directory
'/home/jeffrin/upstream-kernel/linux/tools/testing/selftests/proc'
TAP version 13
selftests: proc-loadavg-001
========================================
ok 1..1 selftests: proc-loadavg-001 [PASS]
Please add me in changelog if i was useful.
On Sat, Apr 21, 2018 at 8:41 PM, Jeffrin Thalakkottoor
<jeffrin(a)rajagiritech.edu.in> wrote:
> hello,
>
> selftests: proc-loadavg-001
> ========================================
> not ok 1..1 selftests: proc-loadavg-001 [FAIL]
>
> To reproduce :
> make -C tools/testing/selftests/proc run_tests
>
> Linux debian 4.17.0-rc1+ #3 SMP Sat Apr 21 03:41:44 IST 2018 x86_64 GNU/Linux
>
> GNU Make 4.2.1
> Binutils 2.30
> Util-linux 2.31.1
> Mount 2.31.1
> Linux C Library 2.27
> Dynamic linker (ldd) 2.27
> readlink: missing operand
> Try 'readlink --help' for more information.
> Procps 3.3.14
> Kbd 2.0.4
> Console-tools 2.0.4
> Sh-utils 8.28
> Udev 238
>
>
>
> --
> software engineer
> rajagiri school of engineering and technology
--
software engineer
rajagiri school of engineering and technology
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7 years
- 1
- 0
[GIT PULL] kselftest update for 4.17-rc2
by Shuah Khan
Hi Linus,
Please pull the following Kselftest update for 4.17-rc2
This Kselftest update for 4.17-rc2 consists of a fix from Michael Ellerman
to not run dnotify_test by default to prevent Kselftest running forever.
diff is attached.
thanks,
-- Shuah
-----------------------------------------------------------------------------------
The following changes since commit 60cc43fc888428bb2f18f08997432d426a243338:
Linux 4.17-rc1 (2018-04-15 18:24:20 -0700)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux-kselftest-4.17-rc2
for you to fetch changes up to 8bf24e8319613bbe950d4188682b3a0d9441b76b:
selftests/filesystems: Don't run dnotify_test by default (2018-04-17 17:01:16 -0600)
----------------------------------------------------------------
linux-kselftest-4.17-rc2
This Kselftest update for 4.17-rc2 consists of a fix from Michael Ellerman
to not run dnotify_test by default to prevent Kselftest running forever.
----------------------------------------------------------------
Michael Ellerman (1):
selftests/filesystems: Don't run dnotify_test by default
tools/testing/selftests/filesystems/Makefile | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
-----------------------------------------------------------------------------------
7 years
- 1
- 0
[PATCH v3 0/2] sparc64: Add privileged ADI driver
by Tom Hromatka
ADI is a feature supported on SPARC M7 and newer processors to allow
hardware to catch rogue accesses to memory. ADI is supported for data
fetches only and not instruction fetches. An app can enable ADI on its
data pages, set version tags on them and use versioned addresses to
access the data pages. Upper bits of the address contain the version
tag. On M7 processors, upper four bits (bits 63-60) contain the version
tag. If a rogue app attempts to access ADI enabled data pages, its
access is blocked and processor generates an exception. Please see
Documentation/sparc/adi.txt for further details.
This patchset implements a char driver to read/write ADI versions from
privileged user space processes. Intended consumers are makedumpfile
and crash.
v3:
* Really fixed the copyright headers to use SPDX GPL v2. Really.
v2:
* Simplified copyright headers
* Completely reworked sparc64 selftests Makefiles. Used the
android selftests Makefiles as an example
* Added run.sh and drivers_test.sh to the sparc64 selftest
directory. Used bpf/test_kmod.sh and the android selftests
as examples
* Minor cleanups in the selftest adi-test.c
* Added calls to ksft_test_*() in the adi-test.c
Tom Hromatka (2):
SPARC M7 and newer processors utilize ADI to version and protect
memory. This driver is capable of reading/writing ADI/MCD versions
from privileged user space processes. Addresses in the adi file are
mapped linearly to physical memory at a ratio of 1:adi_blksz. Thus,
a read (or write) of offset K in the file operates upon the ADI
version at physical address K * adi_blksz. The version information
is encoded as one version per byte. Intended consumers are
makedumpfile and crash.
Add a selftest for the sparc64 privileged ADI driver. These tests
verify the read(), pread(), write(), pwrite(), and seek()
functionality of the driver. The tests also report simple
performance statistics:
drivers/char/Kconfig | 12 +
drivers/char/Makefile | 1 +
drivers/char/adi.c | 240 +++++++
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/sparc64/Makefile | 46 ++
tools/testing/selftests/sparc64/drivers/.gitignore | 1 +
tools/testing/selftests/sparc64/drivers/Makefile | 15 +
tools/testing/selftests/sparc64/drivers/adi-test.c | 721 +++++++++++++++++++++
.../selftests/sparc64/drivers/drivers_test.sh | 30 +
tools/testing/selftests/sparc64/run.sh | 3 +
10 files changed, 1070 insertions(+)
create mode 100644 drivers/char/adi.c
create mode 100644 tools/testing/selftests/sparc64/Makefile
create mode 100644 tools/testing/selftests/sparc64/drivers/.gitignore
create mode 100644 tools/testing/selftests/sparc64/drivers/Makefile
create mode 100644 tools/testing/selftests/sparc64/drivers/adi-test.c
create mode 100755 tools/testing/selftests/sparc64/drivers/drivers_test.sh
create mode 100755 tools/testing/selftests/sparc64/run.sh
--
2.15.0
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7 years
- 2
- 3
[PATCH v2 0/2] sparc64: Add privileged ADI driver
by Tom Hromatka
ADI is a feature supported on SPARC M7 and newer processors to allow
hardware to catch rogue accesses to memory. ADI is supported for data
fetches only and not instruction fetches. An app can enable ADI on its
data pages, set version tags on them and use versioned addresses to
access the data pages. Upper bits of the address contain the version
tag. On M7 processors, upper four bits (bits 63-60) contain the version
tag. If a rogue app attempts to access ADI enabled data pages, its
access is blocked and processor generates an exception. Please see
Documentation/sparc/adi.txt for further details.
This patchset implements a char driver to read/write ADI versions from
privileged user space processes. Intended consumers are makedumpfile
and crash.
v2:
* Simplified copyright headers
* Updated copyright headers to use GPL v3 or later
* Completely reworked sparc64 selftests Makefiles. Used the
android selftests Makefiles as an example
* Added run.sh and drivers_test.sh to the sparc64 selftest
directory. Used bpf/test_kmod.sh and the android selftests
as examples
* Minor cleanups in the selftest adi-test.c
* Added calls to ksft_test_*() in the adi-test.c
Tom Hromatka (2):
char: sparc64: Add privileged ADI driver
selftests: sparc64: char: Selftest for privileged ADI driver
drivers/char/Kconfig | 12 +
drivers/char/Makefile | 1 +
drivers/char/adi.c | 251 +++++++
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/sparc64/Makefile | 46 ++
tools/testing/selftests/sparc64/drivers/.gitignore | 1 +
tools/testing/selftests/sparc64/drivers/Makefile | 15 +
tools/testing/selftests/sparc64/drivers/adi-test.c | 732 +++++++++++++++++++++
.../selftests/sparc64/drivers/drivers_test.sh | 30 +
tools/testing/selftests/sparc64/run.sh | 3 +
10 files changed, 1092 insertions(+)
create mode 100644 drivers/char/adi.c
create mode 100644 tools/testing/selftests/sparc64/Makefile
create mode 100644 tools/testing/selftests/sparc64/drivers/.gitignore
create mode 100644 tools/testing/selftests/sparc64/drivers/Makefile
create mode 100644 tools/testing/selftests/sparc64/drivers/adi-test.c
create mode 100755 tools/testing/selftests/sparc64/drivers/drivers_test.sh
create mode 100755 tools/testing/selftests/sparc64/run.sh
--
2.15.0
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7 years
- 2
- 4
[PATCH 0/2] sparc64: Add privileged ADI driver
by Tom Hromatka
ADI is a feature supported on SPARC M7 and newer processors to allow
hardware to catch rogue accesses to memory. ADI is supported for data
fetches only and not instruction fetches. An app can enable ADI on its
data pages, set version tags on them and use versioned addresses to
access the data pages. Upper bits of the address contain the version
tag. On M7 processors, upper four bits (bits 63-60) contain the version
tag. If a rogue app attempts to access ADI enabled data pages, its
access is blocked and processor generates an exception. Please see
Documentation/sparc/adi.txt for further details.
This patchset implements a char driver to read/write ADI versions from
privileged user space processes. Intended consumers are makedumpfile
and crash.
Tom Hromatka (2):
char: sparc64: Add privileged ADI driver
selftests: sparc64: char: Selftest for privileged ADI driver
drivers/char/Kconfig | 12 +
drivers/char/Makefile | 1 +
drivers/char/adi.c | 262 ++++++++
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/sparc64/Makefile | 52 ++
tools/testing/selftests/sparc64/drivers/.gitignore | 1 +
tools/testing/selftests/sparc64/drivers/Makefile | 13 +
tools/testing/selftests/sparc64/drivers/adi-test.c | 727 +++++++++++++++++++++
8 files changed, 1069 insertions(+)
create mode 100644 drivers/char/adi.c
create mode 100644 tools/testing/selftests/sparc64/Makefile
create mode 100644 tools/testing/selftests/sparc64/drivers/.gitignore
create mode 100644 tools/testing/selftests/sparc64/drivers/Makefile
create mode 100644 tools/testing/selftests/sparc64/drivers/adi-test.c
--
2.15.0
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7 years
- 3
- 6
Linux 4.17-rc1 - kernel paging errors running x86 selftests
by Shuah Khan
Andy/Ingo,
While running test_vsyscall_64 and fsgsbase_64 tests, I am seeing
the following errors in dmesg.
Also these tests either take forever to run or hang. I killed it after
waiting for an hour or so. Unfortunately it makes the kselftest suite
pain to run. Could you please take a look and see if we need to disable
the tests for the time being or any way to make them not painful.
These tests went into stable as well? These commits went through x86 tree
and I didn't get a chance to run the. Did you see these problems when you
ran them on your test systems. I do have KASAN enabled on mine.
[ 884.496588] BUG: unable to handle kernel paging request at fffffe8000010030
[ 884.496601] PGD 372870067 P4D 372870067 PUD 346e84067 PMD 34005f067 PTE ffffffffffffffff
[ 884.496614] Oops: 0009 [#1] SMP KASAN PTI
[ 884.496619] Modules linked in: iptable_mangle xt_tcpudp bridge stp llc iptable_filter binfmt_misc gpio_ich x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd cryptd glue_helper snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic wmi_bmof snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm lpc_ich snd_timer mac_hid parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs xor zstd_decompress zstd_compress xxhash raid6_pq libcrc32c dm_mirror dm_region_hash dm_log hid_generic usbhid hid i915 iosf_mbi i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm r8169 mii wmi video
[ 884.496730] CPU: 1 PID: 8200 Comm: sigreturn_64 Not tainted 4.17.0-rc1 #1
[ 884.496735] Hardware name: System76, Inc. Wild Dog Performance/H87-PLUS, BIOS 0705 12/05/2013
[ 884.496741] RIP: 0033:0x4031c2
[ 884.496745] RSP: 002b:00007ffd805b56d8 EFLAGS: 00010246
[ 884.496751] RAX: 0000000000000000 RBX: 0000000000000010 RCX: 0000000000000000
[ 884.496756] RDX: 0000000000400000 RSI: 0000000000000000 RDI: 0000000000000037
[ 884.496760] RBP: 0000000000000000 R08: 0000000000000037 R09: 0000000000000033
[ 884.496765] R10: 0000000000000010 R11: 0000000000000000 R12: 00000000ffffffff
[ 884.496769] R13: 0000000000402000 R14: 0000000000000000 R15: 0000000000000000
[ 884.496774] FS: 00007f9445162740(0000) GS:ffff8803cfc40000(0000) knlGS:0000000000000000
[ 884.496779] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 884.496783] CR2: fffffe8000010030 CR3: 000000036c5c2002 CR4: 00000000001606e0
[ 884.496788] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 884.496792] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 884.496798] RIP: 0x4031c2 RSP: 00007ffd805b56d8
[ 884.496802] CR2: fffffe8000010030
[ 884.496807] ---[ end trace 286073d5ab6d2df6 ]---
[ 884.650095] BUG: unable to handle kernel paging request at fffffe8000000000
[ 884.650103] PGD 363699067 P4D 363699067 PUD 3371c6067 PMD 37cfbc067 PTE ffffffffffffffff
[ 884.650112] Oops: 0009 [#2] SMP KASAN PTI
[ 884.650115] Modules linked in: iptable_mangle xt_tcpudp bridge stp llc iptable_filter binfmt_misc gpio_ich x86_pkg_temp_thermal coretemp kvm_intel kvm irqbypass ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd cryptd glue_helper snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic wmi_bmof snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm lpc_ich snd_timer mac_hid parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs xor zstd_decompress zstd_compress xxhash raid6_pq libcrc32c dm_mirror dm_region_hash dm_log hid_generic usbhid hid i915 iosf_mbi i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm r8169 mii wmi video
[ 884.650192] CPU: 0 PID: 8251 Comm: fsgsbase_64 Tainted: G D 4.17.0-rc1 #1
[ 884.650195] Hardware name: System76, Inc. Wild Dog Performance/H87-PLUS, BIOS 0705 12/05/2013
[ 884.650200] RIP: 0033:0x401471
[ 884.650203] RSP: 002b:00007fc8e6775eb0 EFLAGS: 00010206
[ 884.650206] RAX: 0000000000000007 RBX: 00000000006030a8 RCX: 0000000000000b40
[ 884.650210] RDX: 00007fc8e6b53880 RSI: 0000000000401918 RDI: 00007fc8e6b52720
[ 884.650213] RBP: a1fa5f343cb85fa4 R08: 00007fc8e6776700 R09: baadf00d00000000
[ 884.650215] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000401727
[ 884.650218] R13: 0000000000401726 R14: 0000000200000000 R15: 00007fc8e67769c0
[ 884.650222] FS: 00007fc8e6776700(0000) GS:ffff8803cfc00000(0000) knlGS:0000000000000000
[ 884.650225] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 884.650228] CR2: fffffe8000000000 CR3: 0000000371d32001 CR4: 00000000001606f0
[ 884.650231] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 884.650233] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 884.650237] RIP: 0x401471 RSP: 00007fc8e6775eb0
[ 884.650240] CR2: fffffe8000000000
[ 884.650244] ---[ end trace 286073d5ab6d2df7 ]---
thanks,
-- Shuah
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7 years
- 4
- 8
Re: [PATCH v2] selftests/livepatch: introduce tests
by Joe Lawrence
On 04/10/2018 11:44 PM, kbuild test robot wrote:
> Hi Joe,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on v4.16]
> [also build test ERROR on next-20180410]
> [cannot apply to linus/master jikos-livepatching/for-next]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
^^^^^^^^^^^^^^
Hi kbuild test robot,
Thank you for testing! Yet something to improve:
Is there syntax one can add to a commit, or better yet, patchset cover
letter to specify a git tree URL in which the patch(set) is based on?
I can't find anything at [1] that documents such feature.
[1] https://01.org/lkp/documentation/0-day-test-service
Thanks,
-- Joe
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7 years
- 3
- 3
[PATCH] selftests:vm: add include file
by Peng Hao
userfaultfd.c: In function ‘hugetlb_release_pages’:
userfaultfd.c:145:25: error: ‘FALLOC_FL_PUNCH_HOLE’ undeclared
(first use in this function)
Signed-off-by: Peng Hao <peng.hao2(a)zte.com.cn>
---
tools/testing/selftests/vm/userfaultfd.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c
index de2f9ec..d8fe447 100644
--- a/tools/testing/selftests/vm/userfaultfd.c
+++ b/tools/testing/selftests/vm/userfaultfd.c
@@ -68,6 +68,7 @@
#include <linux/userfaultfd.h>
#include <setjmp.h>
#include <stdbool.h>
+#include <linux/falloc.h>
#ifdef __NR_userfaultfd
--
1.8.3.1
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7 years
- 2
- 1
[PATCH] selftests: net: add in_netns.sh to TEST_PROGS
by Anders Roxell
Script in_netns.sh isn't installed.
--------------------
running psock_fanout test
--------------------
./run_afpackettests: line 12: ./in_netns.sh: No such file or directory
[FAIL]
--------------------
running psock_tpacket test
--------------------
./run_afpackettests: line 22: ./in_netns.sh: No such file or directory
[FAIL]
In current code added in_netns.sh to be installed.
Fixes: cc30c93fa020 ("selftests/net: ignore background traffic in psock_fanout")
Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org>
---
tools/testing/selftests/net/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index 785fc18a16b4..8f1e13d2e547 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -5,7 +5,7 @@ CFLAGS = -Wall -Wl,--no-as-needed -O2 -g
CFLAGS += -I../../../../usr/include/
TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh rtnetlink.sh
-TEST_PROGS += fib_tests.sh fib-onlink-tests.sh pmtu.sh
+TEST_PROGS += fib_tests.sh fib-onlink-tests.sh in_netns.sh pmtu.sh
TEST_GEN_FILES = socket
TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy
TEST_GEN_PROGS = reuseport_bpf reuseport_bpf_cpu reuseport_bpf_numa
--
2.16.3
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7 years
- 2
- 1
[RFC PATCH for 4.18 23/23] rseq: selftests: Provide Makefile, scripts, gitignore
by Mathieu Desnoyers
A run_param_test.sh script runs many variants of the parametrizable
tests.
Wire up the rseq Makefile, add directory entry into MAINTAINERS file.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
MAINTAINERS | 1 +
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/rseq/.gitignore | 7 ++
tools/testing/selftests/rseq/Makefile | 37 +++++++
tools/testing/selftests/rseq/run_param_test.sh | 131 +++++++++++++++++++++++++
5 files changed, 177 insertions(+)
create mode 100644 tools/testing/selftests/rseq/.gitignore
create mode 100644 tools/testing/selftests/rseq/Makefile
create mode 100755 tools/testing/selftests/rseq/run_param_test.sh
diff --git a/MAINTAINERS b/MAINTAINERS
index adbe93ed27b9..7cf7e43db81f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11831,6 +11831,7 @@ S: Supported
F: kernel/rseq.c
F: include/uapi/linux/rseq.h
F: include/trace/events/rseq.h
+F: tools/testing/selftests/rseq/
RFKILL
M: Johannes Berg <johannes(a)sipsolutions.net>
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 1322e63f5963..c1c9323d4e50 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -26,6 +26,7 @@ TARGETS += nsfs
TARGETS += powerpc
TARGETS += pstore
TARGETS += ptrace
+TARGETS += rseq
TARGETS += seccomp
TARGETS += sigaltstack
TARGETS += size
diff --git a/tools/testing/selftests/rseq/.gitignore b/tools/testing/selftests/rseq/.gitignore
new file mode 100644
index 000000000000..73dcf05b69fd
--- /dev/null
+++ b/tools/testing/selftests/rseq/.gitignore
@@ -0,0 +1,7 @@
+basic_percpu_ops_test
+basic_test
+basic_rseq_op_test
+param_test
+param_test_benchmark
+param_test_compare_twice
+param_test_skip_fastpath
diff --git a/tools/testing/selftests/rseq/Makefile b/tools/testing/selftests/rseq/Makefile
new file mode 100644
index 000000000000..69f90d718774
--- /dev/null
+++ b/tools/testing/selftests/rseq/Makefile
@@ -0,0 +1,37 @@
+CFLAGS += -O2 -Wall -g -I./ -I../cpu-opv/ -I../../../../usr/include/ -L./ -Wl,-rpath=./
+LDLIBS += -lpthread
+
+# Own dependencies because we only want to build against 1st prerequisite, but
+# still track changes to header files and depend on shared object.
+OVERRIDE_TARGETS = 1
+
+TEST_GEN_PROGS = basic_test basic_percpu_ops_test \
+ param_test param_test_skip_fastpath \
+ param_test_benchmark param_test_compare_twice
+
+TEST_GEN_PROGS_EXTENDED = librseq.so libcpu-op.so
+
+TEST_PROGS = run_param_test.sh
+
+include ../lib.mk
+
+$(OUTPUT)/librseq.so: rseq.c rseq.h rseq-*.h
+ $(CC) $(CFLAGS) -shared -fPIC $< $(LDLIBS) -o $@
+
+$(OUTPUT)/libcpu-op.so: ../cpu-opv/cpu-op.c ../cpu-opv/cpu-op.h
+ $(CC) $(CFLAGS) -shared -fPIC $< $(LDLIBS) -o $@
+
+$(OUTPUT)/%: %.c $(TEST_GEN_PROGS_EXTENDED) rseq.h rseq-*.h ../cpu-opv/cpu-op.h percpu-op.h
+ $(CC) $(CFLAGS) $< $(LDLIBS) -lrseq -lcpu-op -o $@
+
+$(OUTPUT)/param_test_skip_fastpath: param_test.c $(TEST_GEN_PROGS_EXTENDED) \
+ rseq.h rseq-*.h ../cpu-opv/cpu-op.h percpu-op.h
+ $(CC) $(CFLAGS) -DRSEQ_SKIP_FASTPATH $< $(LDLIBS) -lrseq -lcpu-op -o $@
+
+$(OUTPUT)/param_test_benchmark: param_test.c $(TEST_GEN_PROGS_EXTENDED) \
+ rseq.h rseq-*.h ../cpu-opv/cpu-op.h percpu-op.h
+ $(CC) $(CFLAGS) -DBENCHMARK $< $(LDLIBS) -lrseq -lcpu-op -o $@
+
+$(OUTPUT)/param_test_compare_twice: param_test.c $(TEST_GEN_PROGS_EXTENDED) \
+ rseq.h rseq-*.h ../cpu-opv/cpu-op.h percpu-op.h
+ $(CC) $(CFLAGS) -DRSEQ_COMPARE_TWICE $< $(LDLIBS) -lrseq -lcpu-op -o $@
diff --git a/tools/testing/selftests/rseq/run_param_test.sh b/tools/testing/selftests/rseq/run_param_test.sh
new file mode 100755
index 000000000000..15c64ecc5eb4
--- /dev/null
+++ b/tools/testing/selftests/rseq/run_param_test.sh
@@ -0,0 +1,131 @@
+#!/bin/bash
+
+EXTRA_ARGS=${@}
+
+OLDIFS="$IFS"
+IFS=$'\n'
+TEST_LIST=(
+ "-T s"
+ "-T l"
+ "-T b"
+ "-T b -M"
+ "-T m"
+ "-T m -M"
+ "-T i"
+)
+
+TEST_NAME=(
+ "spinlock"
+ "list"
+ "buffer"
+ "buffer with barrier"
+ "memcpy"
+ "memcpy with barrier"
+ "increment"
+)
+IFS="$OLDIFS"
+
+REPS=1000
+SLOW_REPS=100
+
+function do_tests()
+{
+ local i=0
+ while [ "$i" -lt "${#TEST_LIST[@]}" ]; do
+ echo "Running test ${TEST_NAME[$i]}"
+ ./param_test ${TEST_LIST[$i]} -r ${REPS} ${@} ${EXTRA_ARGS} || exit 1
+ echo "Running skip fast-path test ${TEST_NAME[$i]}"
+ ./param_test_skip_fastpath ${TEST_LIST[$i]} -r ${SLOW_REPS} ${@} ${EXTRA_ARGS} || exit 1
+ echo "Running compare-twice test ${TEST_NAME[$i]}"
+ ./param_test_compare_twice ${TEST_LIST[$i]} -r ${REPS} ${@} ${EXTRA_ARGS} || exit 1
+ let "i++"
+ done
+}
+
+echo "Default parameters"
+do_tests
+
+echo "Loop injection: 10000 loops"
+
+OLDIFS="$IFS"
+IFS=$'\n'
+INJECT_LIST=(
+ "1"
+ "2"
+ "3"
+ "4"
+ "5"
+ "6"
+ "7"
+ "8"
+ "9"
+)
+IFS="$OLDIFS"
+
+NR_LOOPS=10000
+
+i=0
+while [ "$i" -lt "${#INJECT_LIST[@]}" ]; do
+ echo "Injecting at <${INJECT_LIST[$i]}>"
+ do_tests -${INJECT_LIST[i]} ${NR_LOOPS}
+ let "i++"
+done
+NR_LOOPS=
+
+function inject_blocking()
+{
+ OLDIFS="$IFS"
+ IFS=$'\n'
+ INJECT_LIST=(
+ "7"
+ "8"
+ "9"
+ )
+ IFS="$OLDIFS"
+
+ NR_LOOPS=-1
+
+ i=0
+ while [ "$i" -lt "${#INJECT_LIST[@]}" ]; do
+ echo "Injecting at <${INJECT_LIST[$i]}>"
+ do_tests -${INJECT_LIST[i]} -1 ${@}
+ let "i++"
+ done
+ NR_LOOPS=
+}
+
+echo "Yield injection (25%)"
+inject_blocking -m 4 -y
+
+echo "Yield injection (50%)"
+inject_blocking -m 2 -y
+
+echo "Yield injection (100%)"
+inject_blocking -m 1 -y
+
+echo "Kill injection (25%)"
+inject_blocking -m 4 -k
+
+echo "Kill injection (50%)"
+inject_blocking -m 2 -k
+
+echo "Kill injection (100%)"
+inject_blocking -m 1 -k
+
+echo "Sleep injection (1ms, 25%)"
+inject_blocking -m 4 -s 1
+
+echo "Sleep injection (1ms, 50%)"
+inject_blocking -m 2 -s 1
+
+echo "Sleep injection (1ms, 100%)"
+inject_blocking -m 1 -s 1
+
+echo "Disable rseq for 25% threads"
+do_tests -D 4
+
+echo "Disable rseq for 50% threads"
+do_tests -D 2
+
+echo "Disable rseq"
+do_tests -d
--
2.11.0
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7 years
- 1
- 0
[RFC PATCH for 4.18 22/23] rseq: selftests: Provide parametrized tests
by Mathieu Desnoyers
"param_test" is a parametrizable restartable sequences test. See
the "--help" output for usage.
"param_test_benchmark" is the same as "param_test", but it removes
testing book-keeping code to allow accurate benchmarks.
"param_test_skip_fastpath" is the same as "param_test", but it skips
the rseq fast-path, and only calls the cpu_opv slow path.
"param_test_compare_twice" is the same as "param_test", but it performs
each comparison within rseq critical section twice, thus validating
invariants. If any of the second comparisons fails, an error message
is printed and the test aborts.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
tools/testing/selftests/rseq/param_test.c | 1167 +++++++++++++++++++++++++++++
1 file changed, 1167 insertions(+)
create mode 100644 tools/testing/selftests/rseq/param_test.c
diff --git a/tools/testing/selftests/rseq/param_test.c b/tools/testing/selftests/rseq/param_test.c
new file mode 100644
index 000000000000..3a0cb522eb46
--- /dev/null
+++ b/tools/testing/selftests/rseq/param_test.c
@@ -0,0 +1,1167 @@
+#define _GNU_SOURCE
+#include <assert.h>
+#include <pthread.h>
+#include <sched.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syscall.h>
+#include <unistd.h>
+#include <poll.h>
+#include <sys/types.h>
+#include <signal.h>
+#include <errno.h>
+#include <stddef.h>
+
+static inline pid_t gettid(void)
+{
+ return syscall(__NR_gettid);
+}
+
+#define NR_INJECT 9
+static int loop_cnt[NR_INJECT + 1];
+
+static int loop_cnt_1 asm("asm_loop_cnt_1") __attribute__((used));
+static int loop_cnt_2 asm("asm_loop_cnt_2") __attribute__((used));
+static int loop_cnt_3 asm("asm_loop_cnt_3") __attribute__((used));
+static int loop_cnt_4 asm("asm_loop_cnt_4") __attribute__((used));
+static int loop_cnt_5 asm("asm_loop_cnt_5") __attribute__((used));
+static int loop_cnt_6 asm("asm_loop_cnt_6") __attribute__((used));
+
+static int opt_modulo, verbose;
+
+static int opt_yield, opt_signal, opt_sleep,
+ opt_disable_rseq, opt_threads = 200,
+ opt_disable_mod = 0, opt_test = 's', opt_mb = 0;
+
+#ifndef RSEQ_SKIP_FASTPATH
+static long long opt_reps = 5000;
+#else
+static long long opt_reps = 100;
+#endif
+
+static __thread __attribute__((tls_model("initial-exec")))
+unsigned int signals_delivered;
+
+#ifndef BENCHMARK
+
+static __thread __attribute__((tls_model("initial-exec"), unused))
+unsigned int yield_mod_cnt, nr_abort;
+
+#define printf_verbose(fmt, ...) \
+ do { \
+ if (verbose) \
+ printf(fmt, ## __VA_ARGS__); \
+ } while (0)
+
+#if defined(__x86_64__) || defined(__i386__)
+
+#define INJECT_ASM_REG "eax"
+
+#define RSEQ_INJECT_CLOBBER \
+ , INJECT_ASM_REG
+
+#define RSEQ_INJECT_ASM(n) \
+ "mov asm_loop_cnt_" #n ", %%" INJECT_ASM_REG "\n\t" \
+ "test %%" INJECT_ASM_REG ",%%" INJECT_ASM_REG "\n\t" \
+ "jz 333f\n\t" \
+ "222:\n\t" \
+ "dec %%" INJECT_ASM_REG "\n\t" \
+ "jnz 222b\n\t" \
+ "333:\n\t"
+
+#elif defined(__ARMEL__)
+
+#define RSEQ_INJECT_INPUT \
+ , [loop_cnt_1]"m"(loop_cnt[1]) \
+ , [loop_cnt_2]"m"(loop_cnt[2]) \
+ , [loop_cnt_3]"m"(loop_cnt[3]) \
+ , [loop_cnt_4]"m"(loop_cnt[4]) \
+ , [loop_cnt_5]"m"(loop_cnt[5]) \
+ , [loop_cnt_6]"m"(loop_cnt[6])
+
+#define INJECT_ASM_REG "r4"
+
+#define RSEQ_INJECT_CLOBBER \
+ , INJECT_ASM_REG
+
+#define RSEQ_INJECT_ASM(n) \
+ "ldr " INJECT_ASM_REG ", %[loop_cnt_" #n "]\n\t" \
+ "cmp " INJECT_ASM_REG ", #0\n\t" \
+ "beq 333f\n\t" \
+ "222:\n\t" \
+ "subs " INJECT_ASM_REG ", #1\n\t" \
+ "bne 222b\n\t" \
+ "333:\n\t"
+
+#elif __PPC__
+
+#define RSEQ_INJECT_INPUT \
+ , [loop_cnt_1]"m"(loop_cnt[1]) \
+ , [loop_cnt_2]"m"(loop_cnt[2]) \
+ , [loop_cnt_3]"m"(loop_cnt[3]) \
+ , [loop_cnt_4]"m"(loop_cnt[4]) \
+ , [loop_cnt_5]"m"(loop_cnt[5]) \
+ , [loop_cnt_6]"m"(loop_cnt[6])
+
+#define INJECT_ASM_REG "r18"
+
+#define RSEQ_INJECT_CLOBBER \
+ , INJECT_ASM_REG
+
+#define RSEQ_INJECT_ASM(n) \
+ "lwz %%" INJECT_ASM_REG ", %[loop_cnt_" #n "]\n\t" \
+ "cmpwi %%" INJECT_ASM_REG ", 0\n\t" \
+ "beq 333f\n\t" \
+ "222:\n\t" \
+ "subic. %%" INJECT_ASM_REG ", %%" INJECT_ASM_REG ", 1\n\t" \
+ "bne 222b\n\t" \
+ "333:\n\t"
+#else
+#error unsupported target
+#endif
+
+#define RSEQ_INJECT_FAILED \
+ nr_abort++;
+
+#define RSEQ_INJECT_C(n) \
+{ \
+ int loc_i, loc_nr_loops = loop_cnt[n]; \
+ \
+ for (loc_i = 0; loc_i < loc_nr_loops; loc_i++) { \
+ rseq_barrier(); \
+ } \
+ if (loc_nr_loops == -1 && opt_modulo) { \
+ if (yield_mod_cnt == opt_modulo - 1) { \
+ if (opt_sleep > 0) \
+ poll(NULL, 0, opt_sleep); \
+ if (opt_yield) \
+ sched_yield(); \
+ if (opt_signal) \
+ raise(SIGUSR1); \
+ yield_mod_cnt = 0; \
+ } else { \
+ yield_mod_cnt++; \
+ } \
+ } \
+}
+
+#else
+
+#define printf_verbose(fmt, ...)
+
+#endif /* BENCHMARK */
+
+#include "percpu-op.h"
+
+struct percpu_lock_entry {
+ intptr_t v;
+} __attribute__((aligned(128)));
+
+struct percpu_lock {
+ struct percpu_lock_entry c[CPU_SETSIZE];
+};
+
+struct test_data_entry {
+ intptr_t count;
+} __attribute__((aligned(128)));
+
+struct spinlock_test_data {
+ struct percpu_lock lock;
+ struct test_data_entry c[CPU_SETSIZE];
+};
+
+struct spinlock_thread_test_data {
+ struct spinlock_test_data *data;
+ long long reps;
+ int reg;
+};
+
+struct inc_test_data {
+ struct test_data_entry c[CPU_SETSIZE];
+};
+
+struct inc_thread_test_data {
+ struct inc_test_data *data;
+ long long reps;
+ int reg;
+};
+
+struct percpu_list_node {
+ intptr_t data;
+ struct percpu_list_node *next;
+};
+
+struct percpu_list_entry {
+ struct percpu_list_node *head;
+} __attribute__((aligned(128)));
+
+struct percpu_list {
+ struct percpu_list_entry c[CPU_SETSIZE];
+};
+
+#define BUFFER_ITEM_PER_CPU 100
+
+struct percpu_buffer_node {
+ intptr_t data;
+};
+
+struct percpu_buffer_entry {
+ intptr_t offset;
+ intptr_t buflen;
+ struct percpu_buffer_node **array;
+} __attribute__((aligned(128)));
+
+struct percpu_buffer {
+ struct percpu_buffer_entry c[CPU_SETSIZE];
+};
+
+#define MEMCPY_BUFFER_ITEM_PER_CPU 100
+
+struct percpu_memcpy_buffer_node {
+ intptr_t data1;
+ uint64_t data2;
+};
+
+struct percpu_memcpy_buffer_entry {
+ intptr_t offset;
+ intptr_t buflen;
+ struct percpu_memcpy_buffer_node *array;
+} __attribute__((aligned(128)));
+
+struct percpu_memcpy_buffer {
+ struct percpu_memcpy_buffer_entry c[CPU_SETSIZE];
+};
+
+/* A simple percpu spinlock. */
+static void rseq_percpu_lock(struct percpu_lock *lock, int cpu)
+{
+ for (;;) {
+ int ret;
+
+ ret = percpu_cmpeqv_storev(&lock->c[cpu].v,
+ 0, 1, cpu);
+ if (rseq_likely(!ret))
+ break;
+ if (rseq_unlikely(ret < 0)) {
+ perror("cpu_opv");
+ abort();
+ }
+ /* Retry if comparison fails. */
+ }
+ /*
+ * Acquire semantic when taking lock after control dependency.
+ * Matches rseq_smp_store_release().
+ */
+ rseq_smp_acquire__after_ctrl_dep();
+}
+
+static void rseq_percpu_unlock(struct percpu_lock *lock, int cpu)
+{
+ assert(lock->c[cpu].v == 1);
+ /*
+ * Release lock, with release semantic. Matches
+ * rseq_smp_acquire__after_ctrl_dep().
+ */
+ rseq_smp_store_release(&lock->c[cpu].v, 0);
+}
+
+void *test_percpu_spinlock_thread(void *arg)
+{
+ struct spinlock_thread_test_data *thread_data = arg;
+ struct spinlock_test_data *data = thread_data->data;
+ long long i, reps;
+
+ if (!opt_disable_rseq && thread_data->reg &&
+ rseq_register_current_thread())
+ abort();
+ reps = thread_data->reps;
+ for (i = 0; i < reps; i++) {
+ int cpu = rseq_cpu_start();
+
+ rseq_percpu_lock(&data->lock, cpu);
+ data->c[cpu].count++;
+ rseq_percpu_unlock(&data->lock, cpu);
+#ifndef BENCHMARK
+ if (i != 0 && !(i % (reps / 10)))
+ printf_verbose("tid %d: count %lld\n", (int) gettid(), i);
+#endif
+ }
+ printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
+ (int) gettid(), nr_abort, signals_delivered);
+ if (!opt_disable_rseq && thread_data->reg &&
+ rseq_unregister_current_thread())
+ abort();
+ return NULL;
+}
+
+/*
+ * A simple test which implements a sharded counter using a per-cpu
+ * lock. Obviously real applications might prefer to simply use a
+ * per-cpu increment; however, this is reasonable for a test and the
+ * lock can be extended to synchronize more complicated operations.
+ */
+void test_percpu_spinlock(void)
+{
+ const int num_threads = opt_threads;
+ int i, ret;
+ uint64_t sum;
+ pthread_t test_threads[num_threads];
+ struct spinlock_test_data data;
+ struct spinlock_thread_test_data thread_data[num_threads];
+
+ memset(&data, 0, sizeof(data));
+ for (i = 0; i < num_threads; i++) {
+ thread_data[i].reps = opt_reps;
+ if (opt_disable_mod <= 0 || (i % opt_disable_mod))
+ thread_data[i].reg = 1;
+ else
+ thread_data[i].reg = 0;
+ thread_data[i].data = &data;
+ ret = pthread_create(&test_threads[i], NULL,
+ test_percpu_spinlock_thread,
+ &thread_data[i]);
+ if (ret) {
+ errno = ret;
+ perror("pthread_create");
+ abort();
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_join(test_threads[i], NULL);
+ if (ret) {
+ errno = ret;
+ perror("pthread_join");
+ abort();
+ }
+ }
+
+ sum = 0;
+ for (i = 0; i < CPU_SETSIZE; i++)
+ sum += data.c[i].count;
+
+ assert(sum == (uint64_t)opt_reps * num_threads);
+}
+
+void *test_percpu_inc_thread(void *arg)
+{
+ struct inc_thread_test_data *thread_data = arg;
+ struct inc_test_data *data = thread_data->data;
+ long long i, reps;
+
+ if (!opt_disable_rseq && thread_data->reg &&
+ rseq_register_current_thread())
+ abort();
+ reps = thread_data->reps;
+ for (i = 0; i < reps; i++) {
+ int cpu, ret;
+
+ cpu = rseq_cpu_start();
+ ret = percpu_addv(&data->c[cpu].count, 1, cpu);
+ if (rseq_unlikely(ret)) {
+ perror("cpu_opv");
+ abort();
+ }
+#ifndef BENCHMARK
+ if (i != 0 && !(i % (reps / 10)))
+ printf_verbose("tid %d: count %lld\n", (int) gettid(), i);
+#endif
+ }
+ printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
+ (int) gettid(), nr_abort, signals_delivered);
+ if (!opt_disable_rseq && thread_data->reg &&
+ rseq_unregister_current_thread())
+ abort();
+ return NULL;
+}
+
+void test_percpu_inc(void)
+{
+ const int num_threads = opt_threads;
+ int i, ret;
+ uint64_t sum;
+ pthread_t test_threads[num_threads];
+ struct inc_test_data data;
+ struct inc_thread_test_data thread_data[num_threads];
+
+ memset(&data, 0, sizeof(data));
+ for (i = 0; i < num_threads; i++) {
+ thread_data[i].reps = opt_reps;
+ if (opt_disable_mod <= 0 || (i % opt_disable_mod))
+ thread_data[i].reg = 1;
+ else
+ thread_data[i].reg = 0;
+ thread_data[i].data = &data;
+ ret = pthread_create(&test_threads[i], NULL,
+ test_percpu_inc_thread,
+ &thread_data[i]);
+ if (ret) {
+ errno = ret;
+ perror("pthread_create");
+ abort();
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_join(test_threads[i], NULL);
+ if (ret) {
+ errno = ret;
+ perror("pthread_join");
+ abort();
+ }
+ }
+
+ sum = 0;
+ for (i = 0; i < CPU_SETSIZE; i++)
+ sum += data.c[i].count;
+
+ assert(sum == (uint64_t)opt_reps * num_threads);
+}
+
+void percpu_list_push(struct percpu_list *list,
+ struct percpu_list_node *node,
+ int cpu)
+{
+ for (;;) {
+ intptr_t *targetptr, newval, expect;
+ int ret;
+
+ /* Load list->c[cpu].head with single-copy atomicity. */
+ expect = (intptr_t)RSEQ_READ_ONCE(list->c[cpu].head);
+ newval = (intptr_t)node;
+ targetptr = (intptr_t *)&list->c[cpu].head;
+ node->next = (struct percpu_list_node *)expect;
+ ret = percpu_cmpeqv_storev(targetptr, expect, newval, cpu);
+ if (rseq_likely(!ret))
+ break;
+ if (rseq_unlikely(ret < 0)) {
+ perror("cpu_opv");
+ abort();
+ }
+ /* Retry if comparison fails. */
+ }
+}
+
+/*
+ * Unlike a traditional lock-less linked list; the availability of a
+ * rseq primitive allows us to implement pop without concerns over
+ * ABA-type races.
+ */
+struct percpu_list_node *percpu_list_pop(struct percpu_list *list,
+ int cpu)
+{
+ struct percpu_list_node *head;
+ intptr_t *targetptr, expectnot, *load;
+ off_t offset;
+ int ret;
+
+ targetptr = (intptr_t *)&list->c[cpu].head;
+ expectnot = (intptr_t)NULL;
+ offset = offsetof(struct percpu_list_node, next);
+ load = (intptr_t *)&head;
+ ret = percpu_cmpnev_storeoffp_load(targetptr, expectnot,
+ offset, load, cpu);
+ if (rseq_unlikely(ret < 0)) {
+ perror("cpu_opv");
+ abort();
+ }
+ if (ret > 0)
+ return NULL;
+ return head;
+}
+
+void *test_percpu_list_thread(void *arg)
+{
+ long long i, reps;
+ struct percpu_list *list = (struct percpu_list *)arg;
+
+ if (!opt_disable_rseq && rseq_register_current_thread())
+ abort();
+
+ reps = opt_reps;
+ for (i = 0; i < reps; i++) {
+ struct percpu_list_node *node;
+
+ node = percpu_list_pop(list, rseq_cpu_start());
+ if (opt_yield)
+ sched_yield(); /* encourage shuffling */
+ if (node)
+ percpu_list_push(list, node, rseq_cpu_start());
+ }
+
+ printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
+ (int) gettid(), nr_abort, signals_delivered);
+ if (!opt_disable_rseq && rseq_unregister_current_thread())
+ abort();
+
+ return NULL;
+}
+
+/* Simultaneous modification to a per-cpu linked list from many threads. */
+void test_percpu_list(void)
+{
+ const int num_threads = opt_threads;
+ int i, j, ret;
+ uint64_t sum = 0, expected_sum = 0;
+ struct percpu_list list;
+ pthread_t test_threads[num_threads];
+ cpu_set_t allowed_cpus;
+
+ memset(&list, 0, sizeof(list));
+
+ /* Generate list entries for every usable cpu. */
+ sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+ for (j = 1; j <= 100; j++) {
+ struct percpu_list_node *node;
+
+ expected_sum += j;
+
+ node = malloc(sizeof(*node));
+ assert(node);
+ node->data = j;
+ node->next = list.c[i].head;
+ list.c[i].head = node;
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_create(&test_threads[i], NULL,
+ test_percpu_list_thread, &list);
+ if (ret) {
+ errno = ret;
+ perror("pthread_create");
+ abort();
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_join(test_threads[i], NULL);
+ if (ret) {
+ errno = ret;
+ perror("pthread_join");
+ abort();
+ }
+ }
+
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ struct percpu_list_node *node;
+
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+
+ while ((node = percpu_list_pop(&list, i))) {
+ sum += node->data;
+ free(node);
+ }
+ }
+
+ /*
+ * All entries should now be accounted for (unless some external
+ * actor is interfering with our allowed affinity while this
+ * test is running).
+ */
+ assert(sum == expected_sum);
+}
+
+bool percpu_buffer_push(struct percpu_buffer *buffer,
+ struct percpu_buffer_node *node,
+ int cpu)
+{
+ for (;;) {
+ intptr_t *targetptr_spec, newval_spec;
+ intptr_t *targetptr_final, newval_final;
+ intptr_t offset;
+ int ret;
+
+ offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
+ if (offset == buffer->c[cpu].buflen)
+ return false;
+ newval_spec = (intptr_t)node;
+ targetptr_spec = (intptr_t *)&buffer->c[cpu].array[offset];
+ newval_final = offset + 1;
+ targetptr_final = &buffer->c[cpu].offset;
+ if (opt_mb)
+ ret = percpu_cmpeqv_storev_storev_release(
+ targetptr_final, offset, targetptr_spec,
+ newval_spec, newval_final, cpu);
+ else
+ ret = percpu_cmpeqv_storev_storev(targetptr_final,
+ offset, targetptr_spec, newval_spec,
+ newval_final, cpu);
+ if (rseq_likely(!ret))
+ break;
+ if (rseq_unlikely(ret < 0)) {
+ perror("cpu_opv");
+ abort();
+ }
+ /* Retry if comparison fails. */
+ }
+ return true;
+}
+
+struct percpu_buffer_node *percpu_buffer_pop(struct percpu_buffer *buffer,
+ int cpu)
+{
+ struct percpu_buffer_node *head;
+
+ for (;;) {
+ intptr_t *targetptr, newval;
+ intptr_t offset;
+ int ret;
+
+ /* Load offset with single-copy atomicity. */
+ offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
+ if (offset == 0)
+ return NULL;
+ head = RSEQ_READ_ONCE(buffer->c[cpu].array[offset - 1]);
+ newval = offset - 1;
+ targetptr = (intptr_t *)&buffer->c[cpu].offset;
+ ret = percpu_cmpeqv_cmpeqv_storev(targetptr, offset,
+ (intptr_t *)&buffer->c[cpu].array[offset - 1],
+ (intptr_t)head, newval, cpu);
+ if (rseq_likely(!ret))
+ break;
+ if (rseq_unlikely(ret < 0)) {
+ perror("cpu_opv");
+ abort();
+ }
+ /* Retry if comparison fails. */
+ }
+ return head;
+}
+
+void *test_percpu_buffer_thread(void *arg)
+{
+ long long i, reps;
+ struct percpu_buffer *buffer = (struct percpu_buffer *)arg;
+
+ if (!opt_disable_rseq && rseq_register_current_thread())
+ abort();
+
+ reps = opt_reps;
+ for (i = 0; i < reps; i++) {
+ struct percpu_buffer_node *node;
+
+ node = percpu_buffer_pop(buffer, rseq_cpu_start());
+ if (opt_yield)
+ sched_yield(); /* encourage shuffling */
+ if (node) {
+ if (!percpu_buffer_push(buffer, node,
+ rseq_cpu_start())) {
+ /* Should increase buffer size. */
+ abort();
+ }
+ }
+ }
+
+ printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
+ (int) gettid(), nr_abort, signals_delivered);
+ if (!opt_disable_rseq && rseq_unregister_current_thread())
+ abort();
+
+ return NULL;
+}
+
+/* Simultaneous modification to a per-cpu buffer from many threads. */
+void test_percpu_buffer(void)
+{
+ const int num_threads = opt_threads;
+ int i, j, ret;
+ uint64_t sum = 0, expected_sum = 0;
+ struct percpu_buffer buffer;
+ pthread_t test_threads[num_threads];
+ cpu_set_t allowed_cpus;
+
+ memset(&buffer, 0, sizeof(buffer));
+
+ /* Generate list entries for every usable cpu. */
+ sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+ /* Worse-case is every item in same CPU. */
+ buffer.c[i].array =
+ malloc(sizeof(*buffer.c[i].array) * CPU_SETSIZE *
+ BUFFER_ITEM_PER_CPU);
+ assert(buffer.c[i].array);
+ buffer.c[i].buflen = CPU_SETSIZE * BUFFER_ITEM_PER_CPU;
+ for (j = 1; j <= BUFFER_ITEM_PER_CPU; j++) {
+ struct percpu_buffer_node *node;
+
+ expected_sum += j;
+
+ /*
+ * We could theoretically put the word-sized
+ * "data" directly in the buffer. However, we
+ * want to model objects that would not fit
+ * within a single word, so allocate an object
+ * for each node.
+ */
+ node = malloc(sizeof(*node));
+ assert(node);
+ node->data = j;
+ buffer.c[i].array[j - 1] = node;
+ buffer.c[i].offset++;
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_create(&test_threads[i], NULL,
+ test_percpu_buffer_thread, &buffer);
+ if (ret) {
+ errno = ret;
+ perror("pthread_create");
+ abort();
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_join(test_threads[i], NULL);
+ if (ret) {
+ errno = ret;
+ perror("pthread_join");
+ abort();
+ }
+ }
+
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ struct percpu_buffer_node *node;
+
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+
+ while ((node = percpu_buffer_pop(&buffer, i))) {
+ sum += node->data;
+ free(node);
+ }
+ free(buffer.c[i].array);
+ }
+
+ /*
+ * All entries should now be accounted for (unless some external
+ * actor is interfering with our allowed affinity while this
+ * test is running).
+ */
+ assert(sum == expected_sum);
+}
+
+bool percpu_memcpy_buffer_push(struct percpu_memcpy_buffer *buffer,
+ struct percpu_memcpy_buffer_node item, int cpu)
+{
+ for (;;) {
+ intptr_t *targetptr_final, newval_final, offset;
+ char *destptr, *srcptr;
+ size_t copylen;
+ int ret;
+
+ /* Load offset with single-copy atomicity. */
+ offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
+ if (offset == buffer->c[cpu].buflen)
+ return false;
+ destptr = (char *)&buffer->c[cpu].array[offset];
+ srcptr = (char *)&item;
+ /* copylen must be <= 4kB. */
+ copylen = sizeof(item);
+ newval_final = offset + 1;
+ targetptr_final = &buffer->c[cpu].offset;
+ if (opt_mb)
+ ret = percpu_cmpeqv_memcpy_storev_release(
+ targetptr_final, offset,
+ destptr, srcptr, copylen,
+ newval_final, cpu);
+ else
+ ret = percpu_cmpeqv_memcpy_storev(targetptr_final,
+ offset, destptr, srcptr, copylen,
+ newval_final, cpu);
+ if (rseq_likely(!ret))
+ break;
+ if (rseq_unlikely(ret < 0)) {
+ perror("cpu_opv");
+ abort();
+ }
+ /* Retry if comparison fails. */
+ }
+ return true;
+}
+
+bool percpu_memcpy_buffer_pop(struct percpu_memcpy_buffer *buffer,
+ struct percpu_memcpy_buffer_node *item, int cpu)
+{
+ for (;;) {
+ intptr_t *targetptr_final, newval_final, offset;
+ char *destptr, *srcptr;
+ size_t copylen;
+ int ret;
+
+ /* Load offset with single-copy atomicity. */
+ offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
+ if (offset == 0)
+ return false;
+ destptr = (char *)item;
+ srcptr = (char *)&buffer->c[cpu].array[offset - 1];
+ /* copylen must be <= 4kB. */
+ copylen = sizeof(*item);
+ newval_final = offset - 1;
+ targetptr_final = &buffer->c[cpu].offset;
+ ret = percpu_cmpeqv_memcpy_storev(targetptr_final,
+ offset, destptr, srcptr, copylen,
+ newval_final, cpu);
+ if (rseq_likely(!ret))
+ break;
+ if (rseq_unlikely(ret < 0)) {
+ perror("cpu_opv");
+ abort();
+ }
+ /* Retry if comparison fails. */
+ }
+ return true;
+}
+
+void *test_percpu_memcpy_buffer_thread(void *arg)
+{
+ long long i, reps;
+ struct percpu_memcpy_buffer *buffer = (struct percpu_memcpy_buffer *)arg;
+
+ if (!opt_disable_rseq && rseq_register_current_thread())
+ abort();
+
+ reps = opt_reps;
+ for (i = 0; i < reps; i++) {
+ struct percpu_memcpy_buffer_node item;
+ bool result;
+
+ result = percpu_memcpy_buffer_pop(buffer, &item,
+ rseq_cpu_start());
+ if (opt_yield)
+ sched_yield(); /* encourage shuffling */
+ if (result) {
+ if (!percpu_memcpy_buffer_push(buffer, item,
+ rseq_cpu_start())) {
+ /* Should increase buffer size. */
+ abort();
+ }
+ }
+ }
+
+ printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
+ (int) gettid(), nr_abort, signals_delivered);
+ if (!opt_disable_rseq && rseq_unregister_current_thread())
+ abort();
+
+ return NULL;
+}
+
+/* Simultaneous modification to a per-cpu buffer from many threads. */
+void test_percpu_memcpy_buffer(void)
+{
+ const int num_threads = opt_threads;
+ int i, j, ret;
+ uint64_t sum = 0, expected_sum = 0;
+ struct percpu_memcpy_buffer buffer;
+ pthread_t test_threads[num_threads];
+ cpu_set_t allowed_cpus;
+
+ memset(&buffer, 0, sizeof(buffer));
+
+ /* Generate list entries for every usable cpu. */
+ sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+ /* Worse-case is every item in same CPU. */
+ buffer.c[i].array =
+ malloc(sizeof(*buffer.c[i].array) * CPU_SETSIZE *
+ MEMCPY_BUFFER_ITEM_PER_CPU);
+ assert(buffer.c[i].array);
+ buffer.c[i].buflen = CPU_SETSIZE * MEMCPY_BUFFER_ITEM_PER_CPU;
+ for (j = 1; j <= MEMCPY_BUFFER_ITEM_PER_CPU; j++) {
+ expected_sum += 2 * j + 1;
+
+ /*
+ * We could theoretically put the word-sized
+ * "data" directly in the buffer. However, we
+ * want to model objects that would not fit
+ * within a single word, so allocate an object
+ * for each node.
+ */
+ buffer.c[i].array[j - 1].data1 = j;
+ buffer.c[i].array[j - 1].data2 = j + 1;
+ buffer.c[i].offset++;
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_create(&test_threads[i], NULL,
+ test_percpu_memcpy_buffer_thread,
+ &buffer);
+ if (ret) {
+ errno = ret;
+ perror("pthread_create");
+ abort();
+ }
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ ret = pthread_join(test_threads[i], NULL);
+ if (ret) {
+ errno = ret;
+ perror("pthread_join");
+ abort();
+ }
+ }
+
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ struct percpu_memcpy_buffer_node item;
+
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+
+ while (percpu_memcpy_buffer_pop(&buffer, &item, i)) {
+ sum += item.data1;
+ sum += item.data2;
+ }
+ free(buffer.c[i].array);
+ }
+
+ /*
+ * All entries should now be accounted for (unless some external
+ * actor is interfering with our allowed affinity while this
+ * test is running).
+ */
+ assert(sum == expected_sum);
+}
+
+static void test_signal_interrupt_handler(int signo)
+{
+ signals_delivered++;
+}
+
+static int set_signal_handler(void)
+{
+ int ret = 0;
+ struct sigaction sa;
+ sigset_t sigset;
+
+ ret = sigemptyset(&sigset);
+ if (ret < 0) {
+ perror("sigemptyset");
+ return ret;
+ }
+
+ sa.sa_handler = test_signal_interrupt_handler;
+ sa.sa_mask = sigset;
+ sa.sa_flags = 0;
+ ret = sigaction(SIGUSR1, &sa, NULL);
+ if (ret < 0) {
+ perror("sigaction");
+ return ret;
+ }
+
+ printf_verbose("Signal handler set for SIGUSR1\n");
+
+ return ret;
+}
+
+static void show_usage(int argc, char **argv)
+{
+ printf("Usage : %s <OPTIONS>\n",
+ argv[0]);
+ printf("OPTIONS:\n");
+ printf(" [-1 loops] Number of loops for delay injection 1\n");
+ printf(" [-2 loops] Number of loops for delay injection 2\n");
+ printf(" [-3 loops] Number of loops for delay injection 3\n");
+ printf(" [-4 loops] Number of loops for delay injection 4\n");
+ printf(" [-5 loops] Number of loops for delay injection 5\n");
+ printf(" [-6 loops] Number of loops for delay injection 6\n");
+ printf(" [-7 loops] Number of loops for delay injection 7 (-1 to enable -m)\n");
+ printf(" [-8 loops] Number of loops for delay injection 8 (-1 to enable -m)\n");
+ printf(" [-9 loops] Number of loops for delay injection 9 (-1 to enable -m)\n");
+ printf(" [-m N] Yield/sleep/kill every modulo N (default 0: disabled) (>= 0)\n");
+ printf(" [-y] Yield\n");
+ printf(" [-k] Kill thread with signal\n");
+ printf(" [-s S] S: =0: disabled (default), >0: sleep time (ms)\n");
+ printf(" [-t N] Number of threads (default 200)\n");
+ printf(" [-r N] Number of repetitions per thread (default 5000)\n");
+ printf(" [-d] Disable rseq system call (no initialization)\n");
+ printf(" [-D M] Disable rseq for each M threads\n");
+ printf(" [-T test] Choose test: (s)pinlock, (l)ist, (b)uffer, (m)emcpy, (i)ncrement\n");
+ printf(" [-M] Push into buffer and memcpy buffer with memory barriers.\n");
+ printf(" [-v] Verbose output.\n");
+ printf(" [-h] Show this help.\n");
+ printf("\n");
+}
+
+int main(int argc, char **argv)
+{
+ int i;
+
+ for (i = 1; i < argc; i++) {
+ if (argv[i][0] != '-')
+ continue;
+ switch (argv[i][1]) {
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ loop_cnt[argv[i][1] - '0'] = atol(argv[i + 1]);
+ i++;
+ break;
+ case 'm':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_modulo = atol(argv[i + 1]);
+ if (opt_modulo < 0) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 's':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_sleep = atol(argv[i + 1]);
+ if (opt_sleep < 0) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 'y':
+ opt_yield = 1;
+ break;
+ case 'k':
+ opt_signal = 1;
+ break;
+ case 'd':
+ opt_disable_rseq = 1;
+ break;
+ case 'D':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_disable_mod = atol(argv[i + 1]);
+ if (opt_disable_mod < 0) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 't':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_threads = atol(argv[i + 1]);
+ if (opt_threads < 0) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 'r':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_reps = atoll(argv[i + 1]);
+ if (opt_reps < 0) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 'h':
+ show_usage(argc, argv);
+ goto end;
+ case 'T':
+ if (argc < i + 2) {
+ show_usage(argc, argv);
+ goto error;
+ }
+ opt_test = *argv[i + 1];
+ switch (opt_test) {
+ case 's':
+ case 'l':
+ case 'i':
+ case 'b':
+ case 'm':
+ break;
+ default:
+ show_usage(argc, argv);
+ goto error;
+ }
+ i++;
+ break;
+ case 'v':
+ verbose = 1;
+ break;
+ case 'M':
+ opt_mb = 1;
+ break;
+ default:
+ show_usage(argc, argv);
+ goto error;
+ }
+ }
+
+ loop_cnt_1 = loop_cnt[1];
+ loop_cnt_2 = loop_cnt[2];
+ loop_cnt_3 = loop_cnt[3];
+ loop_cnt_4 = loop_cnt[4];
+ loop_cnt_5 = loop_cnt[5];
+ loop_cnt_6 = loop_cnt[6];
+
+ if (set_signal_handler())
+ goto error;
+
+ if (!opt_disable_rseq && rseq_register_current_thread())
+ goto error;
+ switch (opt_test) {
+ case 's':
+ printf_verbose("spinlock\n");
+ test_percpu_spinlock();
+ break;
+ case 'l':
+ printf_verbose("linked list\n");
+ test_percpu_list();
+ break;
+ case 'b':
+ printf_verbose("buffer\n");
+ test_percpu_buffer();
+ break;
+ case 'm':
+ printf_verbose("memcpy buffer\n");
+ test_percpu_memcpy_buffer();
+ break;
+ case 'i':
+ printf_verbose("counter increment\n");
+ test_percpu_inc();
+ break;
+ }
+ if (!opt_disable_rseq && rseq_unregister_current_thread())
+ abort();
+end:
+ return 0;
+
+error:
+ return -1;
+}
--
2.11.0
--
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7 years
- 1
- 0
[RFC PATCH for 4.18 21/23] rseq: selftests: Provide basic percpu ops test
by Mathieu Desnoyers
"basic_percpu_ops_test" is a slightly more "realistic" variant,
implementing a few simple per-cpu operations and testing their
correctness.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
.../testing/selftests/rseq/basic_percpu_ops_test.c | 296 +++++++++++++++++++++
1 file changed, 296 insertions(+)
create mode 100644 tools/testing/selftests/rseq/basic_percpu_ops_test.c
diff --git a/tools/testing/selftests/rseq/basic_percpu_ops_test.c b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
new file mode 100644
index 000000000000..e585bba0bf8d
--- /dev/null
+++ b/tools/testing/selftests/rseq/basic_percpu_ops_test.c
@@ -0,0 +1,296 @@
+#define _GNU_SOURCE
+#include <assert.h>
+#include <pthread.h>
+#include <sched.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stddef.h>
+
+#include "percpu-op.h"
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+struct percpu_lock_entry {
+ intptr_t v;
+} __attribute__((aligned(128)));
+
+struct percpu_lock {
+ struct percpu_lock_entry c[CPU_SETSIZE];
+};
+
+struct test_data_entry {
+ intptr_t count;
+} __attribute__((aligned(128)));
+
+struct spinlock_test_data {
+ struct percpu_lock lock;
+ struct test_data_entry c[CPU_SETSIZE];
+ int reps;
+};
+
+struct percpu_list_node {
+ intptr_t data;
+ struct percpu_list_node *next;
+};
+
+struct percpu_list_entry {
+ struct percpu_list_node *head;
+} __attribute__((aligned(128)));
+
+struct percpu_list {
+ struct percpu_list_entry c[CPU_SETSIZE];
+};
+
+/* A simple percpu spinlock. Returns the cpu lock was acquired on. */
+int rseq_percpu_lock(struct percpu_lock *lock)
+{
+ int cpu;
+
+ for (;;) {
+ int ret;
+
+ cpu = rseq_cpu_start();
+ ret = percpu_cmpeqv_storev(&lock->c[cpu].v,
+ 0, 1, cpu);
+ if (rseq_likely(!ret))
+ break;
+ if (rseq_unlikely(ret < 0)) {
+ perror("cpu_opv");
+ abort();
+ }
+ /* Retry if comparison fails. */
+ }
+ /*
+ * Acquire semantic when taking lock after control dependency.
+ * Matches rseq_smp_store_release().
+ */
+ rseq_smp_acquire__after_ctrl_dep();
+ return cpu;
+}
+
+void rseq_percpu_unlock(struct percpu_lock *lock, int cpu)
+{
+ assert(lock->c[cpu].v == 1);
+ /*
+ * Release lock, with release semantic. Matches
+ * rseq_smp_acquire__after_ctrl_dep().
+ */
+ rseq_smp_store_release(&lock->c[cpu].v, 0);
+}
+
+void *test_percpu_spinlock_thread(void *arg)
+{
+ struct spinlock_test_data *data = arg;
+ int i, cpu;
+
+ if (rseq_register_current_thread()) {
+ fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ abort();
+ }
+ for (i = 0; i < data->reps; i++) {
+ cpu = rseq_percpu_lock(&data->lock);
+ data->c[cpu].count++;
+ rseq_percpu_unlock(&data->lock, cpu);
+ }
+ if (rseq_unregister_current_thread()) {
+ fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ abort();
+ }
+
+ return NULL;
+}
+
+/*
+ * A simple test which implements a sharded counter using a per-cpu
+ * lock. Obviously real applications might prefer to simply use a
+ * per-cpu increment; however, this is reasonable for a test and the
+ * lock can be extended to synchronize more complicated operations.
+ */
+void test_percpu_spinlock(void)
+{
+ const int num_threads = 200;
+ int i;
+ uint64_t sum;
+ pthread_t test_threads[num_threads];
+ struct spinlock_test_data data;
+
+ memset(&data, 0, sizeof(data));
+ data.reps = 5000;
+
+ for (i = 0; i < num_threads; i++)
+ pthread_create(&test_threads[i], NULL,
+ test_percpu_spinlock_thread, &data);
+
+ for (i = 0; i < num_threads; i++)
+ pthread_join(test_threads[i], NULL);
+
+ sum = 0;
+ for (i = 0; i < CPU_SETSIZE; i++)
+ sum += data.c[i].count;
+
+ assert(sum == (uint64_t)data.reps * num_threads);
+}
+
+int percpu_list_push(struct percpu_list *list, struct percpu_list_node *node,
+ int cpu)
+{
+ for (;;) {
+ intptr_t *targetptr, newval, expect;
+ int ret;
+
+ /* Load list->c[cpu].head with single-copy atomicity. */
+ expect = (intptr_t)RSEQ_READ_ONCE(list->c[cpu].head);
+ newval = (intptr_t)node;
+ targetptr = (intptr_t *)&list->c[cpu].head;
+ node->next = (struct percpu_list_node *)expect;
+ ret = percpu_cmpeqv_storev(targetptr, expect, newval, cpu);
+ if (rseq_likely(!ret))
+ break;
+ if (rseq_unlikely(ret < 0)) {
+ perror("cpu_opv");
+ abort();
+ }
+ /* Retry if comparison fails. */
+ }
+ return cpu;
+}
+
+/*
+ * Unlike a traditional lock-less linked list; the availability of a
+ * rseq primitive allows us to implement pop without concerns over
+ * ABA-type races.
+ */
+struct percpu_list_node *percpu_list_pop(struct percpu_list *list,
+ int cpu)
+{
+ struct percpu_list_node *head;
+ intptr_t *targetptr, expectnot, *load;
+ off_t offset;
+ int ret;
+
+ targetptr = (intptr_t *)&list->c[cpu].head;
+ expectnot = (intptr_t)NULL;
+ offset = offsetof(struct percpu_list_node, next);
+ load = (intptr_t *)&head;
+ ret = percpu_cmpnev_storeoffp_load(targetptr, expectnot,
+ offset, load, cpu);
+ if (rseq_unlikely(ret < 0)) {
+ perror("cpu_opv");
+ abort();
+ }
+ if (ret > 0)
+ return NULL;
+ return head;
+}
+
+void *test_percpu_list_thread(void *arg)
+{
+ int i;
+ struct percpu_list *list = (struct percpu_list *)arg;
+
+ if (rseq_register_current_thread()) {
+ fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ abort();
+ }
+
+ for (i = 0; i < 100000; i++) {
+ struct percpu_list_node *node;
+
+ node = percpu_list_pop(list, rseq_cpu_start());
+ sched_yield(); /* encourage shuffling */
+ if (node)
+ percpu_list_push(list, node, rseq_cpu_start());
+ }
+
+ if (rseq_unregister_current_thread()) {
+ fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ abort();
+ }
+
+ return NULL;
+}
+
+/* Simultaneous modification to a per-cpu linked list from many threads. */
+void test_percpu_list(void)
+{
+ int i, j;
+ uint64_t sum = 0, expected_sum = 0;
+ struct percpu_list list;
+ pthread_t test_threads[200];
+ cpu_set_t allowed_cpus;
+
+ memset(&list, 0, sizeof(list));
+
+ /* Generate list entries for every usable cpu. */
+ sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+ for (j = 1; j <= 100; j++) {
+ struct percpu_list_node *node;
+
+ expected_sum += j;
+
+ node = malloc(sizeof(*node));
+ assert(node);
+ node->data = j;
+ node->next = list.c[i].head;
+ list.c[i].head = node;
+ }
+ }
+
+ for (i = 0; i < 200; i++)
+ pthread_create(&test_threads[i], NULL,
+ test_percpu_list_thread, &list);
+
+ for (i = 0; i < 200; i++)
+ pthread_join(test_threads[i], NULL);
+
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ struct percpu_list_node *node;
+
+ if (!CPU_ISSET(i, &allowed_cpus))
+ continue;
+
+ while ((node = percpu_list_pop(&list, i))) {
+ sum += node->data;
+ free(node);
+ }
+ }
+
+ /*
+ * All entries should now be accounted for (unless some external
+ * actor is interfering with our allowed affinity while this
+ * test is running).
+ */
+ assert(sum == expected_sum);
+}
+
+int main(int argc, char **argv)
+{
+ if (rseq_register_current_thread()) {
+ fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ goto error;
+ }
+ printf("spinlock\n");
+ test_percpu_spinlock();
+ printf("percpu_list\n");
+ test_percpu_list();
+ if (rseq_unregister_current_thread()) {
+ fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ goto error;
+ }
+ return 0;
+
+error:
+ return -1;
+}
+
--
2.11.0
--
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7 years
- 1
- 0
[RFC PATCH for 4.18 20/23] rseq: selftests: Provide basic test
by Mathieu Desnoyers
"basic_test" only asserts that RSEQ works moderately correctly. E.g.
that the CPUID pointer works.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
tools/testing/selftests/rseq/basic_test.c | 55 +++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
create mode 100644 tools/testing/selftests/rseq/basic_test.c
diff --git a/tools/testing/selftests/rseq/basic_test.c b/tools/testing/selftests/rseq/basic_test.c
new file mode 100644
index 000000000000..e2086b3885d7
--- /dev/null
+++ b/tools/testing/selftests/rseq/basic_test.c
@@ -0,0 +1,55 @@
+/*
+ * Basic test coverage for critical regions and rseq_current_cpu().
+ */
+
+#define _GNU_SOURCE
+#include <assert.h>
+#include <sched.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/time.h>
+
+#include "rseq.h"
+
+void test_cpu_pointer(void)
+{
+ cpu_set_t affinity, test_affinity;
+ int i;
+
+ sched_getaffinity(0, sizeof(affinity), &affinity);
+ CPU_ZERO(&test_affinity);
+ for (i = 0; i < CPU_SETSIZE; i++) {
+ if (CPU_ISSET(i, &affinity)) {
+ CPU_SET(i, &test_affinity);
+ sched_setaffinity(0, sizeof(test_affinity),
+ &test_affinity);
+ assert(sched_getcpu() == i);
+ assert(rseq_current_cpu() == i);
+ assert(rseq_current_cpu_raw() == i);
+ assert(rseq_cpu_start() == i);
+ CPU_CLR(i, &test_affinity);
+ }
+ }
+ sched_setaffinity(0, sizeof(affinity), &affinity);
+}
+
+int main(int argc, char **argv)
+{
+ if (rseq_register_current_thread()) {
+ fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ goto init_thread_error;
+ }
+ printf("testing current cpu\n");
+ test_cpu_pointer();
+ if (rseq_unregister_current_thread()) {
+ fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
+ errno, strerror(errno));
+ goto init_thread_error;
+ }
+ return 0;
+
+init_thread_error:
+ return -1;
+}
--
2.11.0
--
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7 years
- 1
- 0
[RFC PATCH for 4.18 19/23] rseq: selftests: Provide percpu_op API
by Mathieu Desnoyers
Introduce percpu-op.h API. It uses rseq internally as fast-path if
invoked from the right CPU, else cpu_opv as slow-path if called
from the wrong CPU or if rseq fails.
This allows acting on per-cpu data from various CPUs transparently from
user-space: cpu_opv will take care of migrating the thread to the
requested CPU. Use-cases such as rebalancing memory across per-cpu
memory pools, or migrating tasks for a user-space scheduler, are thus
facilitated. This also handles debugger single-stepping.
The use from userspace is, e.g. for a counter increment:
int cpu, ret;
cpu = rseq_cpu_start();
ret = percpu_addv(&data->c[cpu].count, 1, cpu);
if (unlikely(ret)) {
perror("percpu_addv");
return -1;
}
return 0;
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
tools/testing/selftests/rseq/percpu-op.h | 163 +++++++++++++++++++++++++++++++
1 file changed, 163 insertions(+)
create mode 100644 tools/testing/selftests/rseq/percpu-op.h
diff --git a/tools/testing/selftests/rseq/percpu-op.h b/tools/testing/selftests/rseq/percpu-op.h
new file mode 100644
index 000000000000..c17d165438a6
--- /dev/null
+++ b/tools/testing/selftests/rseq/percpu-op.h
@@ -0,0 +1,163 @@
+/*
+ * percpu-op.h
+ *
+ * (C) Copyright 2017 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef PERCPU_OP_H
+#define PERCPU_OP_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <stdlib.h>
+#include "rseq.h"
+#include "cpu-op.h"
+
+static inline __attribute__((always_inline))
+int percpu_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv,
+ int cpu)
+{
+ int ret;
+
+ ret = rseq_cmpeqv_storev(v, expect, newv, cpu);
+ if (rseq_unlikely(ret)) {
+ if (ret > 0)
+ return ret;
+ return cpu_op_cmpeqv_storev(v, expect, newv, cpu);
+ }
+ return 0;
+}
+
+static inline __attribute__((always_inline))
+int percpu_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ int ret;
+
+ ret = rseq_cmpnev_storeoffp_load(v, expectnot, voffp, load, cpu);
+ if (rseq_unlikely(ret)) {
+ if (ret > 0)
+ return ret;
+ return cpu_op_cmpnev_storeoffp_load(v, expectnot, voffp,
+ load, cpu);
+ }
+ return 0;
+}
+
+static inline __attribute__((always_inline))
+int percpu_addv(intptr_t *v, intptr_t count, int cpu)
+{
+ if (rseq_unlikely(rseq_addv(v, count, cpu)))
+ return cpu_op_addv(v, count, cpu);
+ return 0;
+}
+
+static inline __attribute__((always_inline))
+int percpu_cmpeqv_storev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ int ret;
+
+ ret = rseq_cmpeqv_trystorev_storev(v, expect, v2, newv2,
+ newv, cpu);
+ if (rseq_unlikely(ret)) {
+ if (ret > 0)
+ return ret;
+ return cpu_op_cmpeqv_storev_storev(v, expect, v2, newv2,
+ newv, cpu);
+ }
+ return 0;
+}
+
+static inline __attribute__((always_inline))
+int percpu_cmpeqv_storev_storev_release(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ int ret;
+
+ ret = rseq_cmpeqv_trystorev_storev_release(v, expect, v2, newv2,
+ newv, cpu);
+ if (rseq_unlikely(ret)) {
+ if (ret > 0)
+ return ret;
+ return cpu_op_cmpeqv_storev_mb_storev(v, expect, v2, newv2,
+ newv, cpu);
+ }
+ return 0;
+}
+
+static inline __attribute__((always_inline))
+int percpu_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ int ret;
+
+ ret = rseq_cmpeqv_cmpeqv_storev(v, expect, v2, expect2, newv, cpu);
+ if (rseq_unlikely(ret)) {
+ if (ret > 0)
+ return ret;
+ return cpu_op_cmpeqv_cmpeqv_storev(v, expect, v2, expect2,
+ newv, cpu);
+ }
+ return 0;
+}
+
+static inline __attribute__((always_inline))
+int percpu_cmpeqv_memcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ int ret;
+
+ ret = rseq_cmpeqv_trymemcpy_storev(v, expect, dst, src, len,
+ newv, cpu);
+ if (rseq_unlikely(ret)) {
+ if (ret > 0)
+ return ret;
+ return cpu_op_cmpeqv_memcpy_storev(v, expect, dst, src, len,
+ newv, cpu);
+ }
+ return 0;
+}
+
+static inline __attribute__((always_inline))
+int percpu_cmpeqv_memcpy_storev_release(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ int ret;
+
+ ret = rseq_cmpeqv_trymemcpy_storev_release(v, expect, dst, src, len,
+ newv, cpu);
+ if (rseq_unlikely(ret)) {
+ if (ret > 0)
+ return ret;
+ return cpu_op_cmpeqv_memcpy_mb_storev(v, expect, dst, src, len,
+ newv, cpu);
+ }
+ return 0;
+}
+
+#endif /* PERCPU_OP_H_ */
--
2.11.0
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7 years
- 1
- 0
[RFC PATCH for 4.18 18/23] rseq: selftests: Provide rseq library (v5)
by Mathieu Desnoyers
This rseq helper library provides a user-space API to the rseq()
system call.
The rseq fast-path exposes the instruction pointer addresses where the
rseq assembly blocks begin and end, as well as the associated abort
instruction pointer, in the __rseq_table section. This section allows
debuggers may know where to place breakpoints when single-stepping
through assembly blocks which may be aborted at any point by the kernel.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
CC: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
Changes since v1:
- Provide abort-ip signature: The abort-ip signature is located just
before the abort-ip target. It is currently hardcoded, but a
user-space application could use the __rseq_table to iterate on all
abort-ip targets and use a random value as signature if needed in the
future.
- Add rseq_prepare_unload(): Libraries and JIT code using rseq critical
sections need to issue rseq_prepare_unload() on each thread at least
once before reclaim of struct rseq_cs.
- Use initial-exec TLS model, non-weak symbol: The initial-exec model is
signal-safe, whereas the global-dynamic model is not. Remove the
"weak" symbol attribute from the __rseq_abi in rseq.c. The rseq.so
library will have ownership of that symbol, and there is not reason for
an application or user library to try to define that symbol.
The expected use is to link against libreq.so, which owns and provide
that symbol.
- Set cpu_id to -2 on register error
- Add rseq_len syscall parameter, rseq_cs version
- Ensure disassember-friendly signature: x86 32/64 disassembler have a
hard time decoding the instruction stream after a bad instruction. Use
a nopl instruction to encode the signature. Suggested by Andy Lutomirski.
- Exercise parametrized tests variants in a shell scripts.
- Restartable sequences selftests: Remove use of event counter.
- Use cpu_id_start field: With the cpu_id_start field, the C
preparation phase of the fast-path does not need to compare cpu_id < 0
anymore.
- Signal-safe registration and refcounting: Allow libraries using
librseq.so to register it from signal handlers.
- Use OVERRIDE_TARGETS in makefile.
- Use "m" constraints for rseq_cs field.
Changes since v2:
- Update based on Thomas Gleixner's comments.
Changes since v3:
- Generate param_test_skip_fastpath and param_test_benchmark with
-DSKIP_FASTPATH and -DBENCHMARK (respectively). Add param_test_fastpath
to run_param_test.sh.
Changes since v4:
- Fold arm: workaround gcc asm size guess,
- Namespace barrier() -> rseq_barrier() in library header,
- Take into account coding style feedback from Peter Zijlstra,
- Split rseq selftests into logical commits.
---
tools/testing/selftests/rseq/rseq-arm.h | 732 +++++++++++++++++++
tools/testing/selftests/rseq/rseq-ppc.h | 688 ++++++++++++++++++
tools/testing/selftests/rseq/rseq-skip.h | 82 +++
tools/testing/selftests/rseq/rseq-x86.h | 1149 ++++++++++++++++++++++++++++++
tools/testing/selftests/rseq/rseq.c | 116 +++
tools/testing/selftests/rseq/rseq.h | 164 +++++
6 files changed, 2931 insertions(+)
create mode 100644 tools/testing/selftests/rseq/rseq-arm.h
create mode 100644 tools/testing/selftests/rseq/rseq-ppc.h
create mode 100644 tools/testing/selftests/rseq/rseq-skip.h
create mode 100644 tools/testing/selftests/rseq/rseq-x86.h
create mode 100644 tools/testing/selftests/rseq/rseq.c
create mode 100644 tools/testing/selftests/rseq/rseq.h
diff --git a/tools/testing/selftests/rseq/rseq-arm.h b/tools/testing/selftests/rseq/rseq-arm.h
new file mode 100644
index 000000000000..adcaa6cbbd01
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-arm.h
@@ -0,0 +1,732 @@
+/*
+ * rseq-arm.h
+ *
+ * (C) Copyright 2016 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#define RSEQ_SIG 0x53053053
+
+#define rseq_smp_mb() __asm__ __volatile__ ("dmb" ::: "memory", "cc")
+#define rseq_smp_rmb() __asm__ __volatile__ ("dmb" ::: "memory", "cc")
+#define rseq_smp_wmb() __asm__ __volatile__ ("dmb" ::: "memory", "cc")
+
+#define rseq_smp_load_acquire(p) \
+__extension__ ({ \
+ __typeof(*p) ____p1 = RSEQ_READ_ONCE(*p); \
+ rseq_smp_mb(); \
+ ____p1; \
+})
+
+#define rseq_smp_acquire__after_ctrl_dep() rseq_smp_rmb()
+
+#define rseq_smp_store_release(p, v) \
+do { \
+ rseq_smp_mb(); \
+ RSEQ_WRITE_ONCE(*p, v); \
+} while (0)
+
+#ifdef RSEQ_SKIP_FASTPATH
+#include "rseq-skip.h"
+#else /* !RSEQ_SKIP_FASTPATH */
+
+#define __RSEQ_ASM_DEFINE_TABLE(version, flags, start_ip, \
+ post_commit_offset, abort_ip) \
+ ".pushsection __rseq_table, \"aw\"\n\t" \
+ ".balign 32\n\t" \
+ ".word " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ ".word " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) ", 0x0\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_DEFINE_TABLE(start_ip, post_commit_ip, abort_ip) \
+ __RSEQ_ASM_DEFINE_TABLE(0x0, 0x0, start_ip, \
+ (post_commit_ip - start_ip), abort_ip)
+
+#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
+ RSEQ_INJECT_ASM(1) \
+ "adr r0, " __rseq_str(cs_label) "\n\t" \
+ "str r0, %[" __rseq_str(rseq_cs) "]\n\t" \
+ __rseq_str(label) ":\n\t"
+
+#define RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, label) \
+ RSEQ_INJECT_ASM(2) \
+ "ldr r0, %[" __rseq_str(current_cpu_id) "]\n\t" \
+ "cmp %[" __rseq_str(cpu_id) "], r0\n\t" \
+ "bne " __rseq_str(label) "\n\t"
+
+#define __RSEQ_ASM_DEFINE_ABORT(table_label, label, teardown, \
+ abort_label, version, flags, \
+ start_ip, post_commit_offset, abort_ip) \
+ __rseq_str(table_label) ":\n\t" \
+ ".word " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ ".word " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) ", 0x0\n\t" \
+ ".word " __rseq_str(RSEQ_SIG) "\n\t" \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "b %l[" __rseq_str(abort_label) "]\n\t"
+
+#define RSEQ_ASM_DEFINE_ABORT(table_label, label, teardown, abort_label, \
+ start_ip, post_commit_ip, abort_ip) \
+ __RSEQ_ASM_DEFINE_ABORT(table_label, label, teardown, \
+ abort_label, 0x0, 0x0, start_ip, \
+ (post_commit_ip - start_ip), abort_ip)
+
+#define RSEQ_ASM_DEFINE_CMPFAIL(label, teardown, cmpfail_label) \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "b %l[" __rseq_str(cmpfail_label) "]\n\t"
+
+#define rseq_workaround_gcc_asm_size_guess() __asm__ __volatile__("")
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[error2]\n\t"
+#endif
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expectnot], r0\n\t"
+ "beq %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "ldr r0, %[v]\n\t"
+ "cmp %[expectnot], r0\n\t"
+ "beq %l[error2]\n\t"
+#endif
+ "str r0, %[load]\n\t"
+ "add r0, %[voffp]\n\t"
+ "ldr r0, [r0]\n\t"
+ /* final store */
+ "str r0, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expectnot] "r" (expectnot),
+ [voffp] "Ir" (voffp),
+ [load] "m" (*load)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_addv(intptr_t *v, intptr_t count, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+#endif
+ "ldr r0, %[v]\n\t"
+ "add r0, %[count]\n\t"
+ /* final store */
+ "str r0, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(4)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [v] "m" (*v),
+ [count] "Ir" (count)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort
+#ifdef RSEQ_COMPARE_TWICE
+ , error1
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[error2]\n\t"
+#endif
+ /* try store */
+ "str %[newv2], %[v2]\n\t"
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[error2]\n\t"
+#endif
+ /* try store */
+ "str %[newv2], %[v2]\n\t"
+ RSEQ_INJECT_ASM(5)
+ "dmb\n\t" /* full mb provides store-release */
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+ "ldr r0, %[v2]\n\t"
+ "cmp %[expect2], r0\n\t"
+ "bne %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(5)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne %l[error2]\n\t"
+ "ldr r0, %[v2]\n\t"
+ "cmp %[expect2], r0\n\t"
+ "bne %l[error3]\n\t"
+#endif
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ "b 5f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4, "", abort, 1b, 2b, 4f)
+ "5:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* cmp2 input */
+ [v2] "m" (*v2),
+ [expect2] "r" (expect2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2, error3
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("1st expected value comparison failed");
+error3:
+ rseq_bug("2nd expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ uint32_t rseq_scratch[3];
+
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ "str %[src], %[rseq_scratch0]\n\t"
+ "str %[dst], %[rseq_scratch1]\n\t"
+ "str %[len], %[rseq_scratch2]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne 5f\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne 7f\n\t"
+#endif
+ /* try memcpy */
+ "cmp %[len], #0\n\t" \
+ "beq 333f\n\t" \
+ "222:\n\t" \
+ "ldrb %%r0, [%[src]]\n\t" \
+ "strb %%r0, [%[dst]]\n\t" \
+ "adds %[src], #1\n\t" \
+ "adds %[dst], #1\n\t" \
+ "subs %[len], #1\n\t" \
+ "bne 222b\n\t" \
+ "333:\n\t" \
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t"
+ "b 8f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ abort, 1b, 2b, 4f)
+ RSEQ_ASM_DEFINE_CMPFAIL(5,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ cmpfail)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_DEFINE_CMPFAIL(6,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ error1)
+ RSEQ_ASM_DEFINE_CMPFAIL(7,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ error2)
+#endif
+ "8:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len),
+ [rseq_scratch0] "m" (rseq_scratch[0]),
+ [rseq_scratch1] "m" (rseq_scratch[1]),
+ [rseq_scratch2] "m" (rseq_scratch[2])
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_workaround_gcc_asm_size_guess();
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_workaround_gcc_asm_size_guess();
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ uint32_t rseq_scratch[3];
+
+ RSEQ_INJECT_C(9)
+
+ rseq_workaround_gcc_asm_size_guess();
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(1f, 2f, 4f) /* start, commit, abort */
+ "str %[src], %[rseq_scratch0]\n\t"
+ "str %[dst], %[rseq_scratch1]\n\t"
+ "str %[len], %[rseq_scratch2]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3f, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne 5f\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
+ "ldr r0, %[v]\n\t"
+ "cmp %[expect], r0\n\t"
+ "bne 7f\n\t"
+#endif
+ /* try memcpy */
+ "cmp %[len], #0\n\t" \
+ "beq 333f\n\t" \
+ "222:\n\t" \
+ "ldrb %%r0, [%[src]]\n\t" \
+ "strb %%r0, [%[dst]]\n\t" \
+ "adds %[src], #1\n\t" \
+ "adds %[dst], #1\n\t" \
+ "subs %[len], #1\n\t" \
+ "bne 222b\n\t" \
+ "333:\n\t" \
+ RSEQ_INJECT_ASM(5)
+ "dmb\n\t" /* full mb provides store-release */
+ /* final store */
+ "str %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t"
+ "b 8f\n\t"
+ RSEQ_ASM_DEFINE_ABORT(3, 4,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ abort, 1b, 2b, 4f)
+ RSEQ_ASM_DEFINE_CMPFAIL(5,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ cmpfail)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_DEFINE_CMPFAIL(6,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ error1)
+ RSEQ_ASM_DEFINE_CMPFAIL(7,
+ /* teardown */
+ "ldr %[len], %[rseq_scratch2]\n\t"
+ "ldr %[dst], %[rseq_scratch1]\n\t"
+ "ldr %[src], %[rseq_scratch0]\n\t",
+ error2)
+#endif
+ "8:\n\t"
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len),
+ [rseq_scratch0] "m" (rseq_scratch[0]),
+ [rseq_scratch1] "m" (rseq_scratch[1]),
+ [rseq_scratch2] "m" (rseq_scratch[2])
+ RSEQ_INJECT_INPUT
+ : "r0", "memory", "cc"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ rseq_workaround_gcc_asm_size_guess();
+ return 0;
+abort:
+ rseq_workaround_gcc_asm_size_guess();
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ rseq_workaround_gcc_asm_size_guess();
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_workaround_gcc_asm_size_guess();
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_workaround_gcc_asm_size_guess();
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+#endif /* !RSEQ_SKIP_FASTPATH */
diff --git a/tools/testing/selftests/rseq/rseq-ppc.h b/tools/testing/selftests/rseq/rseq-ppc.h
new file mode 100644
index 000000000000..2d6d2dfa1235
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-ppc.h
@@ -0,0 +1,688 @@
+/*
+ * rseq-ppc.h
+ *
+ * (C) Copyright 2016 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ * (C) Copyright 2016 - Boqun Feng <boqun.feng(a)gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#define RSEQ_SIG 0x53053053
+
+#define rseq_smp_mb() __asm__ __volatile__ ("sync" ::: "memory", "cc")
+#define rseq_smp_lwsync() __asm__ __volatile__ ("lwsync" ::: "memory", "cc")
+#define rseq_smp_rmb() rseq_smp_lwsync()
+#define rseq_smp_wmb() rseq_smp_lwsync()
+
+#define rseq_smp_load_acquire(p) \
+__extension__ ({ \
+ __typeof(*p) ____p1 = RSEQ_READ_ONCE(*p); \
+ rseq_smp_lwsync(); \
+ ____p1; \
+})
+
+#define rseq_smp_acquire__after_ctrl_dep() rseq_smp_lwsync()
+
+#define rseq_smp_store_release(p, v) \
+do { \
+ rseq_smp_lwsync(); \
+ RSEQ_WRITE_ONCE(*p, v); \
+} while (0)
+
+#ifdef RSEQ_SKIP_FASTPATH
+#include "rseq-skip.h"
+#else /* !RSEQ_SKIP_FASTPATH */
+
+/*
+ * The __rseq_table section can be used by debuggers to better handle
+ * single-stepping through the restartable critical sections.
+ */
+
+#ifdef __PPC64__
+
+#define STORE_WORD "std "
+#define LOAD_WORD "ld "
+#define LOADX_WORD "ldx "
+#define CMP_WORD "cmpd "
+
+#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, \
+ start_ip, post_commit_offset, abort_ip) \
+ ".pushsection __rseq_table, \"aw\"\n\t" \
+ ".balign 32\n\t" \
+ __rseq_str(label) ":\n\t" \
+ ".long " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ ".quad " __rseq_str(start_ip) ", " __rseq_str(post_commit_offset) ", " __rseq_str(abort_ip) "\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
+ RSEQ_INJECT_ASM(1) \
+ "lis %%r17, (" __rseq_str(cs_label) ")@highest\n\t" \
+ "ori %%r17, %%r17, (" __rseq_str(cs_label) ")@higher\n\t" \
+ "rldicr %%r17, %%r17, 32, 31\n\t" \
+ "oris %%r17, %%r17, (" __rseq_str(cs_label) ")@high\n\t" \
+ "ori %%r17, %%r17, (" __rseq_str(cs_label) ")@l\n\t" \
+ "std %%r17, %[" __rseq_str(rseq_cs) "]\n\t" \
+ __rseq_str(label) ":\n\t"
+
+#else /* #ifdef __PPC64__ */
+
+#define STORE_WORD "stw "
+#define LOAD_WORD "lwz "
+#define LOADX_WORD "lwzx "
+#define CMP_WORD "cmpw "
+
+#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, \
+ start_ip, post_commit_offset, abort_ip) \
+ ".pushsection __rseq_table, \"aw\"\n\t" \
+ ".balign 32\n\t" \
+ __rseq_str(label) ":\n\t" \
+ ".long " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ /* 32-bit only supported on BE */ \
+ ".long 0x0, " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) "\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
+ RSEQ_INJECT_ASM(1) \
+ "lis %%r17, (" __rseq_str(cs_label) ")@ha\n\t" \
+ "addi %%r17, %%r17, (" __rseq_str(cs_label) ")@l\n\t" \
+ "stw %%r17, %[" __rseq_str(rseq_cs) "]\n\t" \
+ __rseq_str(label) ":\n\t"
+
+#endif /* #ifdef __PPC64__ */
+
+#define RSEQ_ASM_DEFINE_TABLE(label, start_ip, post_commit_ip, abort_ip) \
+ __RSEQ_ASM_DEFINE_TABLE(label, 0x0, 0x0, start_ip, \
+ (post_commit_ip - start_ip), abort_ip)
+
+#define RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, label) \
+ RSEQ_INJECT_ASM(2) \
+ "lwz %%r17, %[" __rseq_str(current_cpu_id) "]\n\t" \
+ "cmpw cr7, %[" __rseq_str(cpu_id) "], %%r17\n\t" \
+ "bne- cr7, " __rseq_str(label) "\n\t"
+
+#define RSEQ_ASM_DEFINE_ABORT(label, abort_label) \
+ ".pushsection __rseq_failure, \"ax\"\n\t" \
+ ".long " __rseq_str(RSEQ_SIG) "\n\t" \
+ __rseq_str(label) ":\n\t" \
+ "b %l[" __rseq_str(abort_label) "]\n\t" \
+ ".popsection\n\t"
+
+/*
+ * RSEQ_ASM_OPs: asm operations for rseq
+ * RSEQ_ASM_OP_R_*: has hard-code registers in it
+ * RSEQ_ASM_OP_* (else): doesn't have hard-code registers(unless cr7)
+ */
+#define RSEQ_ASM_OP_CMPEQ(var, expect, label) \
+ LOAD_WORD "%%r17, %[" __rseq_str(var) "]\n\t" \
+ CMP_WORD "cr7, %%r17, %[" __rseq_str(expect) "]\n\t" \
+ "bne- cr7, " __rseq_str(label) "\n\t"
+
+#define RSEQ_ASM_OP_CMPNE(var, expectnot, label) \
+ LOAD_WORD "%%r17, %[" __rseq_str(var) "]\n\t" \
+ CMP_WORD "cr7, %%r17, %[" __rseq_str(expectnot) "]\n\t" \
+ "beq- cr7, " __rseq_str(label) "\n\t"
+
+#define RSEQ_ASM_OP_STORE(value, var) \
+ STORE_WORD "%[" __rseq_str(value) "], %[" __rseq_str(var) "]\n\t"
+
+/* Load @var to r17 */
+#define RSEQ_ASM_OP_R_LOAD(var) \
+ LOAD_WORD "%%r17, %[" __rseq_str(var) "]\n\t"
+
+/* Store r17 to @var */
+#define RSEQ_ASM_OP_R_STORE(var) \
+ STORE_WORD "%%r17, %[" __rseq_str(var) "]\n\t"
+
+/* Add @count to r17 */
+#define RSEQ_ASM_OP_R_ADD(count) \
+ "add %%r17, %[" __rseq_str(count) "], %%r17\n\t"
+
+/* Load (r17 + voffp) to r17 */
+#define RSEQ_ASM_OP_R_LOADX(voffp) \
+ LOADX_WORD "%%r17, %[" __rseq_str(voffp) "], %%r17\n\t"
+
+/* TODO: implement a faster memcpy. */
+#define RSEQ_ASM_OP_R_MEMCPY() \
+ "cmpdi %%r19, 0\n\t" \
+ "beq 333f\n\t" \
+ "addi %%r20, %%r20, -1\n\t" \
+ "addi %%r21, %%r21, -1\n\t" \
+ "222:\n\t" \
+ "lbzu %%r18, 1(%%r20)\n\t" \
+ "stbu %%r18, 1(%%r21)\n\t" \
+ "addi %%r19, %%r19, -1\n\t" \
+ "cmpdi %%r19, 0\n\t" \
+ "bne 222b\n\t" \
+ "333:\n\t" \
+
+#define RSEQ_ASM_OP_R_FINAL_STORE(var, post_commit_label) \
+ STORE_WORD "%%r17, %[" __rseq_str(var) "]\n\t" \
+ __rseq_str(post_commit_label) ":\n\t"
+
+#define RSEQ_ASM_OP_FINAL_STORE(value, var, post_commit_label) \
+ STORE_WORD "%[" __rseq_str(value) "], %[" __rseq_str(var) "]\n\t" \
+ __rseq_str(post_commit_label) ":\n\t"
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+#endif
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v not equal to @expectnot */
+ RSEQ_ASM_OP_CMPNE(v, expectnot, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v not equal to @expectnot */
+ RSEQ_ASM_OP_CMPNE(v, expectnot, %l[error2])
+#endif
+ /* load the value of @v */
+ RSEQ_ASM_OP_R_LOAD(v)
+ /* store it in @load */
+ RSEQ_ASM_OP_R_STORE(load)
+ /* dereference voffp(v) */
+ RSEQ_ASM_OP_R_LOADX(voffp)
+ /* final store the value at voffp(v) */
+ RSEQ_ASM_OP_R_FINAL_STORE(v, 2)
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expectnot] "r" (expectnot),
+ [voffp] "b" (voffp),
+ [load] "m" (*load)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_addv(intptr_t *v, intptr_t count, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+#endif
+ /* load the value of @v */
+ RSEQ_ASM_OP_R_LOAD(v)
+ /* add @count to it */
+ RSEQ_ASM_OP_R_ADD(count)
+ /* final store */
+ RSEQ_ASM_OP_R_FINAL_STORE(v, 2)
+ RSEQ_INJECT_ASM(4)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [count] "r" (count)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort
+#ifdef RSEQ_COMPARE_TWICE
+ , error1
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+#endif
+ /* try store */
+ RSEQ_ASM_OP_STORE(newv2, v2)
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+#endif
+ /* try store */
+ RSEQ_ASM_OP_STORE(newv2, v2)
+ RSEQ_INJECT_ASM(5)
+ /* for 'release' */
+ "lwsync\n\t"
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+ /* cmp @v2 equal to @expct2 */
+ RSEQ_ASM_OP_CMPEQ(v2, expect2, %l[cmpfail])
+ RSEQ_INJECT_ASM(5)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+ /* cmp @v2 equal to @expct2 */
+ RSEQ_ASM_OP_CMPEQ(v2, expect2, %l[error3])
+#endif
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* cmp2 input */
+ [v2] "m" (*v2),
+ [expect2] "r" (expect2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2, error3
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("1st expected value comparison failed");
+error3:
+ rseq_bug("2nd expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* setup for mempcy */
+ "mr %%r19, %[len]\n\t"
+ "mr %%r20, %[src]\n\t"
+ "mr %%r21, %[dst]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+#endif
+ /* try memcpy */
+ RSEQ_ASM_OP_R_MEMCPY()
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17", "r18", "r19", "r20", "r21"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* setup for mempcy */
+ "mr %%r19, %[len]\n\t"
+ "mr %%r20, %[src]\n\t"
+ "mr %%r21, %[dst]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[cmpfail])
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ /* cmp cpuid */
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ /* cmp @v equal to @expect */
+ RSEQ_ASM_OP_CMPEQ(v, expect, %l[error2])
+#endif
+ /* try memcpy */
+ RSEQ_ASM_OP_R_MEMCPY()
+ RSEQ_INJECT_ASM(5)
+ /* for 'release' */
+ "lwsync\n\t"
+ /* final store */
+ RSEQ_ASM_OP_FINAL_STORE(newv, v, 2)
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ RSEQ_ASM_DEFINE_ABORT(4, abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len)
+ RSEQ_INJECT_INPUT
+ : "memory", "cc", "r17", "r18", "r19", "r20", "r21"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+#undef STORE_WORD
+#undef LOAD_WORD
+#undef LOADX_WORD
+#undef CMP_WORD
+
+#endif /* !RSEQ_SKIP_FASTPATH */
diff --git a/tools/testing/selftests/rseq/rseq-skip.h b/tools/testing/selftests/rseq/rseq-skip.h
new file mode 100644
index 000000000000..dc8f8e74b737
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-skip.h
@@ -0,0 +1,82 @@
+/*
+ * rseq-skip.h
+ *
+ * (C) Copyright 2017 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_addv(intptr_t *v, intptr_t count, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ return -1;
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ return -1;
+}
diff --git a/tools/testing/selftests/rseq/rseq-x86.h b/tools/testing/selftests/rseq/rseq-x86.h
new file mode 100644
index 000000000000..02d853ae2ce1
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-x86.h
@@ -0,0 +1,1149 @@
+/*
+ * rseq-x86.h
+ *
+ * (C) Copyright 2016 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <stdint.h>
+
+#define RSEQ_SIG 0x53053053
+
+#ifdef __x86_64__
+
+#define rseq_smp_mb() \
+ __asm__ __volatile__ ("lock; addl $0,-128(%%rsp)" ::: "memory", "cc")
+#define rseq_smp_rmb() rseq_barrier()
+#define rseq_smp_wmb() rseq_barrier()
+
+#define rseq_smp_load_acquire(p) \
+__extension__ ({ \
+ __typeof(*p) ____p1 = RSEQ_READ_ONCE(*p); \
+ rseq_barrier(); \
+ ____p1; \
+})
+
+#define rseq_smp_acquire__after_ctrl_dep() rseq_smp_rmb()
+
+#define rseq_smp_store_release(p, v) \
+do { \
+ rseq_barrier(); \
+ RSEQ_WRITE_ONCE(*p, v); \
+} while (0)
+
+#ifdef RSEQ_SKIP_FASTPATH
+#include "rseq-skip.h"
+#else /* !RSEQ_SKIP_FASTPATH */
+
+#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, \
+ start_ip, post_commit_offset, abort_ip) \
+ ".pushsection __rseq_table, \"aw\"\n\t" \
+ ".balign 32\n\t" \
+ __rseq_str(label) ":\n\t" \
+ ".long " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ ".quad " __rseq_str(start_ip) ", " __rseq_str(post_commit_offset) ", " __rseq_str(abort_ip) "\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_DEFINE_TABLE(label, start_ip, post_commit_ip, abort_ip) \
+ __RSEQ_ASM_DEFINE_TABLE(label, 0x0, 0x0, start_ip, \
+ (post_commit_ip - start_ip), abort_ip)
+
+#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
+ RSEQ_INJECT_ASM(1) \
+ "leaq " __rseq_str(cs_label) "(%%rip), %%rax\n\t" \
+ "movq %%rax, %[" __rseq_str(rseq_cs) "]\n\t" \
+ __rseq_str(label) ":\n\t"
+
+#define RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, label) \
+ RSEQ_INJECT_ASM(2) \
+ "cmpl %[" __rseq_str(cpu_id) "], %[" __rseq_str(current_cpu_id) "]\n\t" \
+ "jnz " __rseq_str(label) "\n\t"
+
+#define RSEQ_ASM_DEFINE_ABORT(label, teardown, abort_label) \
+ ".pushsection __rseq_failure, \"ax\"\n\t" \
+ /* Disassembler-friendly signature: nopl <sig>(%rip). */\
+ ".byte 0x0f, 0x1f, 0x05\n\t" \
+ ".long " __rseq_str(RSEQ_SIG) "\n\t" \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "jmp %l[" __rseq_str(abort_label) "]\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_DEFINE_CMPFAIL(label, teardown, cmpfail_label) \
+ ".pushsection __rseq_failure, \"ax\"\n\t" \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "jmp %l[" __rseq_str(cmpfail_label) "]\n\t" \
+ ".popsection\n\t"
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+#endif
+ /* final store */
+ "movq %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "rax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+/*
+ * Compare @v against @expectnot. When it does _not_ match, load @v
+ * into @load, and store the content of *@v + voffp into @v.
+ */
+static inline __attribute__((always_inline))
+int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "movq %[v], %%rbx\n\t"
+ "cmpq %%rbx, %[expectnot]\n\t"
+ "je %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "movq %[v], %%rbx\n\t"
+ "cmpq %%rbx, %[expectnot]\n\t"
+ "je %l[error2]\n\t"
+#endif
+ "movq %%rbx, %[load]\n\t"
+ "addq %[voffp], %%rbx\n\t"
+ "movq (%%rbx), %%rbx\n\t"
+ /* final store */
+ "movq %%rbx, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expectnot] "r" (expectnot),
+ [voffp] "er" (voffp),
+ [load] "m" (*load)
+ : "memory", "cc", "rax", "rbx"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_addv(intptr_t *v, intptr_t count, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+#endif
+ /* final store */
+ "addq %[count], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(4)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [count] "er" (count)
+ : "memory", "cc", "rax"
+ RSEQ_INJECT_CLOBBER
+ : abort
+#ifdef RSEQ_COMPARE_TWICE
+ , error1
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+#endif
+ /* try store */
+ "movq %[newv2], %[v2]\n\t"
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ "movq %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "rax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+/* x86-64 is TSO. */
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ return rseq_cmpeqv_trystorev_storev(v, expect, v2, newv2, newv, cpu);
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+ "cmpq %[v2], %[expect2]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(5)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpq %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+ "cmpq %[v2], %[expect2]\n\t"
+ "jnz %l[error3]\n\t"
+#endif
+ /* final store */
+ "movq %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* cmp2 input */
+ [v2] "m" (*v2),
+ [expect2] "r" (expect2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "rax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2, error3
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("1st expected value comparison failed");
+error3:
+ rseq_bug("2nd expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ uint64_t rseq_scratch[3];
+
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ "movq %[src], %[rseq_scratch0]\n\t"
+ "movq %[dst], %[rseq_scratch1]\n\t"
+ "movq %[len], %[rseq_scratch2]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpq %[v], %[expect]\n\t"
+ "jnz 5f\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
+ "cmpq %[v], %[expect]\n\t"
+ "jnz 7f\n\t"
+#endif
+ /* try memcpy */
+ "test %[len], %[len]\n\t" \
+ "jz 333f\n\t" \
+ "222:\n\t" \
+ "movb (%[src]), %%al\n\t" \
+ "movb %%al, (%[dst])\n\t" \
+ "inc %[src]\n\t" \
+ "inc %[dst]\n\t" \
+ "dec %[len]\n\t" \
+ "jnz 222b\n\t" \
+ "333:\n\t" \
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ "movq %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ "movq %[rseq_scratch2], %[len]\n\t"
+ "movq %[rseq_scratch1], %[dst]\n\t"
+ "movq %[rseq_scratch0], %[src]\n\t"
+ RSEQ_ASM_DEFINE_ABORT(4,
+ "movq %[rseq_scratch2], %[len]\n\t"
+ "movq %[rseq_scratch1], %[dst]\n\t"
+ "movq %[rseq_scratch0], %[src]\n\t",
+ abort)
+ RSEQ_ASM_DEFINE_CMPFAIL(5,
+ "movq %[rseq_scratch2], %[len]\n\t"
+ "movq %[rseq_scratch1], %[dst]\n\t"
+ "movq %[rseq_scratch0], %[src]\n\t",
+ cmpfail)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_DEFINE_CMPFAIL(6,
+ "movq %[rseq_scratch2], %[len]\n\t"
+ "movq %[rseq_scratch1], %[dst]\n\t"
+ "movq %[rseq_scratch0], %[src]\n\t",
+ error1)
+ RSEQ_ASM_DEFINE_CMPFAIL(7,
+ "movq %[rseq_scratch2], %[len]\n\t"
+ "movq %[rseq_scratch1], %[dst]\n\t"
+ "movq %[rseq_scratch0], %[src]\n\t",
+ error2)
+#endif
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len),
+ [rseq_scratch0] "m" (rseq_scratch[0]),
+ [rseq_scratch1] "m" (rseq_scratch[1]),
+ [rseq_scratch2] "m" (rseq_scratch[2])
+ : "memory", "cc", "rax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+/* x86-64 is TSO. */
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ return rseq_cmpeqv_trymemcpy_storev(v, expect, dst, src, len,
+ newv, cpu);
+}
+
+#endif /* !RSEQ_SKIP_FASTPATH */
+
+#elif __i386__
+
+#define rseq_smp_mb() \
+ __asm__ __volatile__ ("lock; addl $0,-128(%%esp)" ::: "memory", "cc")
+#define rseq_smp_rmb() \
+ __asm__ __volatile__ ("lock; addl $0,-128(%%esp)" ::: "memory", "cc")
+#define rseq_smp_wmb() \
+ __asm__ __volatile__ ("lock; addl $0,-128(%%esp)" ::: "memory", "cc")
+
+#define rseq_smp_load_acquire(p) \
+__extension__ ({ \
+ __typeof(*p) ____p1 = RSEQ_READ_ONCE(*p); \
+ rseq_smp_mb(); \
+ ____p1; \
+})
+
+#define rseq_smp_acquire__after_ctrl_dep() rseq_smp_rmb()
+
+#define rseq_smp_store_release(p, v) \
+do { \
+ rseq_smp_mb(); \
+ RSEQ_WRITE_ONCE(*p, v); \
+} while (0)
+
+#ifdef RSEQ_SKIP_FASTPATH
+#include "rseq-skip.h"
+#else /* !RSEQ_SKIP_FASTPATH */
+
+/*
+ * Use eax as scratch register and take memory operands as input to
+ * lessen register pressure. Especially needed when compiling in O0.
+ */
+#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, \
+ start_ip, post_commit_offset, abort_ip) \
+ ".pushsection __rseq_table, \"aw\"\n\t" \
+ ".balign 32\n\t" \
+ __rseq_str(label) ":\n\t" \
+ ".long " __rseq_str(version) ", " __rseq_str(flags) "\n\t" \
+ ".long " __rseq_str(start_ip) ", 0x0, " __rseq_str(post_commit_offset) ", 0x0, " __rseq_str(abort_ip) ", 0x0\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_DEFINE_TABLE(label, start_ip, post_commit_ip, abort_ip) \
+ __RSEQ_ASM_DEFINE_TABLE(label, 0x0, 0x0, start_ip, \
+ (post_commit_ip - start_ip), abort_ip)
+
+#define RSEQ_ASM_STORE_RSEQ_CS(label, cs_label, rseq_cs) \
+ RSEQ_INJECT_ASM(1) \
+ "movl $" __rseq_str(cs_label) ", %[rseq_cs]\n\t" \
+ __rseq_str(label) ":\n\t"
+
+#define RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, label) \
+ RSEQ_INJECT_ASM(2) \
+ "cmpl %[" __rseq_str(cpu_id) "], %[" __rseq_str(current_cpu_id) "]\n\t" \
+ "jnz " __rseq_str(label) "\n\t"
+
+#define RSEQ_ASM_DEFINE_ABORT(label, teardown, abort_label) \
+ ".pushsection __rseq_failure, \"ax\"\n\t" \
+ /* Disassembler-friendly signature: nopl <sig>. */ \
+ ".byte 0x0f, 0x1f, 0x05\n\t" \
+ ".long " __rseq_str(RSEQ_SIG) "\n\t" \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "jmp %l[" __rseq_str(abort_label) "]\n\t" \
+ ".popsection\n\t"
+
+#define RSEQ_ASM_DEFINE_CMPFAIL(label, teardown, cmpfail_label) \
+ ".pushsection __rseq_failure, \"ax\"\n\t" \
+ __rseq_str(label) ":\n\t" \
+ teardown \
+ "jmp %l[" __rseq_str(cmpfail_label) "]\n\t" \
+ ".popsection\n\t"
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+#endif
+ /* final store */
+ "movl %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+/*
+ * Compare @v against @expectnot. When it does _not_ match, load @v
+ * into @load, and store the content of *@v + voffp into @v.
+ */
+static inline __attribute__((always_inline))
+int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "movl %[v], %%ebx\n\t"
+ "cmpl %%ebx, %[expectnot]\n\t"
+ "je %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "movl %[v], %%ebx\n\t"
+ "cmpl %%ebx, %[expectnot]\n\t"
+ "je %l[error2]\n\t"
+#endif
+ "movl %%ebx, %[load]\n\t"
+ "addl %[voffp], %%ebx\n\t"
+ "movl (%%ebx), %%ebx\n\t"
+ /* final store */
+ "movl %%ebx, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(5)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expectnot] "r" (expectnot),
+ [voffp] "ir" (voffp),
+ [load] "m" (*load)
+ : "memory", "cc", "eax", "ebx"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_addv(intptr_t *v, intptr_t count, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+#endif
+ /* final store */
+ "addl %[count], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(4)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [count] "ir" (count)
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort
+#ifdef RSEQ_COMPARE_TWICE
+ , error1
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+#endif
+ /* try store */
+ "movl %[newv2], %%eax\n\t"
+ "movl %%eax, %[v2]\n\t"
+ RSEQ_INJECT_ASM(5)
+ /* final store */
+ "movl %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "m" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "movl %[expect], %%eax\n\t"
+ "cmpl %[v], %%eax\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "movl %[expect], %%eax\n\t"
+ "cmpl %[v], %%eax\n\t"
+ "jnz %l[error2]\n\t"
+#endif
+ /* try store */
+ "movl %[newv2], %[v2]\n\t"
+ RSEQ_INJECT_ASM(5)
+ "lock; addl $0,-128(%%esp)\n\t"
+ /* final store */
+ "movl %[newv], %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* try store input */
+ [v2] "m" (*v2),
+ [newv2] "r" (newv2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "m" (expect),
+ [newv] "r" (newv)
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+
+}
+
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(4)
+ "cmpl %[expect2], %[v2]\n\t"
+ "jnz %l[cmpfail]\n\t"
+ RSEQ_INJECT_ASM(5)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+ "cmpl %[v], %[expect]\n\t"
+ "jnz %l[error2]\n\t"
+ "cmpl %[expect2], %[v2]\n\t"
+ "jnz %l[error3]\n\t"
+#endif
+ "movl %[newv], %%eax\n\t"
+ /* final store */
+ "movl %%eax, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* cmp2 input */
+ [v2] "m" (*v2),
+ [expect2] "r" (expect2),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "r" (expect),
+ [newv] "m" (newv)
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2, error3
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("1st expected value comparison failed");
+error3:
+ rseq_bug("2nd expected value comparison failed");
+#endif
+}
+
+/* TODO: implement a faster memcpy. */
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ uint32_t rseq_scratch[3];
+
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ "movl %[src], %[rseq_scratch0]\n\t"
+ "movl %[dst], %[rseq_scratch1]\n\t"
+ "movl %[len], %[rseq_scratch2]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "movl %[expect], %%eax\n\t"
+ "cmpl %%eax, %[v]\n\t"
+ "jnz 5f\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
+ "movl %[expect], %%eax\n\t"
+ "cmpl %%eax, %[v]\n\t"
+ "jnz 7f\n\t"
+#endif
+ /* try memcpy */
+ "test %[len], %[len]\n\t" \
+ "jz 333f\n\t" \
+ "222:\n\t" \
+ "movb (%[src]), %%al\n\t" \
+ "movb %%al, (%[dst])\n\t" \
+ "inc %[src]\n\t" \
+ "inc %[dst]\n\t" \
+ "dec %[len]\n\t" \
+ "jnz 222b\n\t" \
+ "333:\n\t" \
+ RSEQ_INJECT_ASM(5)
+ "movl %[newv], %%eax\n\t"
+ /* final store */
+ "movl %%eax, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t"
+ RSEQ_ASM_DEFINE_ABORT(4,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ abort)
+ RSEQ_ASM_DEFINE_CMPFAIL(5,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ cmpfail)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_DEFINE_CMPFAIL(6,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ error1)
+ RSEQ_ASM_DEFINE_CMPFAIL(7,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ error2)
+#endif
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "m" (expect),
+ [newv] "m" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len),
+ [rseq_scratch0] "m" (rseq_scratch[0]),
+ [rseq_scratch1] "m" (rseq_scratch[1]),
+ [rseq_scratch2] "m" (rseq_scratch[2])
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+/* TODO: implement a faster memcpy. */
+static inline __attribute__((always_inline))
+int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ uint32_t rseq_scratch[3];
+
+ RSEQ_INJECT_C(9)
+
+ __asm__ __volatile__ goto (
+ RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+ "movl %[src], %[rseq_scratch0]\n\t"
+ "movl %[dst], %[rseq_scratch1]\n\t"
+ "movl %[len], %[rseq_scratch2]\n\t"
+ /* Start rseq by storing table entry pointer into rseq_cs. */
+ RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+ RSEQ_INJECT_ASM(3)
+ "movl %[expect], %%eax\n\t"
+ "cmpl %%eax, %[v]\n\t"
+ "jnz 5f\n\t"
+ RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
+ "movl %[expect], %%eax\n\t"
+ "cmpl %%eax, %[v]\n\t"
+ "jnz 7f\n\t"
+#endif
+ /* try memcpy */
+ "test %[len], %[len]\n\t" \
+ "jz 333f\n\t" \
+ "222:\n\t" \
+ "movb (%[src]), %%al\n\t" \
+ "movb %%al, (%[dst])\n\t" \
+ "inc %[src]\n\t" \
+ "inc %[dst]\n\t" \
+ "dec %[len]\n\t" \
+ "jnz 222b\n\t" \
+ "333:\n\t" \
+ RSEQ_INJECT_ASM(5)
+ "lock; addl $0,-128(%%esp)\n\t"
+ "movl %[newv], %%eax\n\t"
+ /* final store */
+ "movl %%eax, %[v]\n\t"
+ "2:\n\t"
+ RSEQ_INJECT_ASM(6)
+ /* teardown */
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t"
+ RSEQ_ASM_DEFINE_ABORT(4,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ abort)
+ RSEQ_ASM_DEFINE_CMPFAIL(5,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ cmpfail)
+#ifdef RSEQ_COMPARE_TWICE
+ RSEQ_ASM_DEFINE_CMPFAIL(6,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ error1)
+ RSEQ_ASM_DEFINE_CMPFAIL(7,
+ "movl %[rseq_scratch2], %[len]\n\t"
+ "movl %[rseq_scratch1], %[dst]\n\t"
+ "movl %[rseq_scratch0], %[src]\n\t",
+ error2)
+#endif
+ : /* gcc asm goto does not allow outputs */
+ : [cpu_id] "r" (cpu),
+ [current_cpu_id] "m" (__rseq_abi.cpu_id),
+ [rseq_cs] "m" (__rseq_abi.rseq_cs),
+ /* final store input */
+ [v] "m" (*v),
+ [expect] "m" (expect),
+ [newv] "m" (newv),
+ /* try memcpy input */
+ [dst] "r" (dst),
+ [src] "r" (src),
+ [len] "r" (len),
+ [rseq_scratch0] "m" (rseq_scratch[0]),
+ [rseq_scratch1] "m" (rseq_scratch[1]),
+ [rseq_scratch2] "m" (rseq_scratch[2])
+ : "memory", "cc", "eax"
+ RSEQ_INJECT_CLOBBER
+ : abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+ , error1, error2
+#endif
+ );
+ return 0;
+abort:
+ RSEQ_INJECT_FAILED
+ return -1;
+cmpfail:
+ return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+ rseq_bug("cpu_id comparison failed");
+error2:
+ rseq_bug("expected value comparison failed");
+#endif
+}
+
+#endif /* !RSEQ_SKIP_FASTPATH */
+
+#endif
diff --git a/tools/testing/selftests/rseq/rseq.c b/tools/testing/selftests/rseq/rseq.c
new file mode 100644
index 000000000000..ba65c14ef3ae
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq.c
@@ -0,0 +1,116 @@
+/*
+ * rseq.c
+ *
+ * Copyright (C) 2016 Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ */
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <syscall.h>
+#include <assert.h>
+#include <signal.h>
+
+#include "rseq.h"
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+__attribute__((tls_model("initial-exec"))) __thread
+volatile struct rseq __rseq_abi = {
+ .cpu_id = RSEQ_CPU_ID_UNINITIALIZED,
+};
+
+static __attribute__((tls_model("initial-exec"))) __thread
+volatile int refcount;
+
+static void signal_off_save(sigset_t *oldset)
+{
+ sigset_t set;
+ int ret;
+
+ sigfillset(&set);
+ ret = pthread_sigmask(SIG_BLOCK, &set, oldset);
+ if (ret)
+ abort();
+}
+
+static void signal_restore(sigset_t oldset)
+{
+ int ret;
+
+ ret = pthread_sigmask(SIG_SETMASK, &oldset, NULL);
+ if (ret)
+ abort();
+}
+
+static int sys_rseq(volatile struct rseq *rseq_abi, uint32_t rseq_len,
+ int flags, uint32_t sig)
+{
+ return syscall(__NR_rseq, rseq_abi, rseq_len, flags, sig);
+}
+
+int rseq_register_current_thread(void)
+{
+ int rc, ret = 0;
+ sigset_t oldset;
+
+ signal_off_save(&oldset);
+ if (refcount++)
+ goto end;
+ rc = sys_rseq(&__rseq_abi, sizeof(struct rseq), 0, RSEQ_SIG);
+ if (!rc) {
+ assert(rseq_current_cpu_raw() >= 0);
+ goto end;
+ }
+ if (errno != EBUSY)
+ __rseq_abi.cpu_id = -2;
+ ret = -1;
+ refcount--;
+end:
+ signal_restore(oldset);
+ return ret;
+}
+
+int rseq_unregister_current_thread(void)
+{
+ int rc, ret = 0;
+ sigset_t oldset;
+
+ signal_off_save(&oldset);
+ if (--refcount)
+ goto end;
+ rc = sys_rseq(&__rseq_abi, sizeof(struct rseq),
+ RSEQ_FLAG_UNREGISTER, RSEQ_SIG);
+ if (!rc)
+ goto end;
+ ret = -1;
+end:
+ signal_restore(oldset);
+ return ret;
+}
+
+int32_t rseq_fallback_current_cpu(void)
+{
+ int32_t cpu;
+
+ cpu = sched_getcpu();
+ if (cpu < 0) {
+ perror("sched_getcpu()");
+ abort();
+ }
+ return cpu;
+}
diff --git a/tools/testing/selftests/rseq/rseq.h b/tools/testing/selftests/rseq/rseq.h
new file mode 100644
index 000000000000..d199f0beee1b
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq.h
@@ -0,0 +1,164 @@
+/*
+ * rseq.h
+ *
+ * (C) Copyright 2016 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef RSEQ_H
+#define RSEQ_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <pthread.h>
+#include <signal.h>
+#include <sched.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sched.h>
+#include <linux/rseq.h>
+
+/*
+ * Empty code injection macros, override when testing.
+ * It is important to consider that the ASM injection macros need to be
+ * fully reentrant (e.g. do not modify the stack).
+ */
+#ifndef RSEQ_INJECT_ASM
+#define RSEQ_INJECT_ASM(n)
+#endif
+
+#ifndef RSEQ_INJECT_C
+#define RSEQ_INJECT_C(n)
+#endif
+
+#ifndef RSEQ_INJECT_INPUT
+#define RSEQ_INJECT_INPUT
+#endif
+
+#ifndef RSEQ_INJECT_CLOBBER
+#define RSEQ_INJECT_CLOBBER
+#endif
+
+#ifndef RSEQ_INJECT_FAILED
+#define RSEQ_INJECT_FAILED
+#endif
+
+extern __thread volatile struct rseq __rseq_abi;
+
+#define rseq_likely(x) __builtin_expect(!!(x), 1)
+#define rseq_unlikely(x) __builtin_expect(!!(x), 0)
+#define rseq_barrier() __asm__ __volatile__("" : : : "memory")
+
+#define RSEQ_ACCESS_ONCE(x) (*(__volatile__ __typeof__(x) *)&(x))
+#define RSEQ_WRITE_ONCE(x, v) __extension__ ({ RSEQ_ACCESS_ONCE(x) = (v); })
+#define RSEQ_READ_ONCE(x) RSEQ_ACCESS_ONCE(x)
+
+#define __rseq_str_1(x) #x
+#define __rseq_str(x) __rseq_str_1(x)
+
+#define rseq_log(fmt, args...) \
+ fprintf(stderr, fmt "(in %s() at " __FILE__ ":" __rseq_str(__LINE__)"\n", \
+ ## args, __func__)
+
+#define rseq_bug(fmt, args...) \
+ do { \
+ rseq_log(fmt, ##args); \
+ abort(); \
+ } while (0)
+
+#if defined(__x86_64__) || defined(__i386__)
+#include <rseq-x86.h>
+#elif defined(__ARMEL__)
+#include <rseq-arm.h>
+#elif defined(__PPC__)
+#include <rseq-ppc.h>
+#else
+#error unsupported target
+#endif
+
+/*
+ * Register rseq for the current thread. This needs to be called once
+ * by any thread which uses restartable sequences, before they start
+ * using restartable sequences, to ensure restartable sequences
+ * succeed. A restartable sequence executed from a non-registered
+ * thread will always fail.
+ */
+int rseq_register_current_thread(void);
+
+/*
+ * Unregister rseq for current thread.
+ */
+int rseq_unregister_current_thread(void);
+
+/*
+ * Restartable sequence fallback for reading the current CPU number.
+ */
+int32_t rseq_fallback_current_cpu(void);
+
+/*
+ * Values returned can be either the current CPU number, -1 (rseq is
+ * uninitialized), or -2 (rseq initialization has failed).
+ */
+static inline int32_t rseq_current_cpu_raw(void)
+{
+ return RSEQ_ACCESS_ONCE(__rseq_abi.cpu_id);
+}
+
+/*
+ * Returns a possible CPU number, which is typically the current CPU.
+ * The returned CPU number can be used to prepare for an rseq critical
+ * section, which will confirm whether the cpu number is indeed the
+ * current one, and whether rseq is initialized.
+ *
+ * The CPU number returned by rseq_cpu_start should always be validated
+ * by passing it to a rseq asm sequence, or by comparing it to the
+ * return value of rseq_current_cpu_raw() if the rseq asm sequence
+ * does not need to be invoked.
+ */
+static inline uint32_t rseq_cpu_start(void)
+{
+ return RSEQ_ACCESS_ONCE(__rseq_abi.cpu_id_start);
+}
+
+static inline uint32_t rseq_current_cpu(void)
+{
+ int32_t cpu;
+
+ cpu = rseq_current_cpu_raw();
+ if (rseq_unlikely(cpu < 0))
+ cpu = rseq_fallback_current_cpu();
+ return cpu;
+}
+
+/*
+ * rseq_prepare_unload() should be invoked by each thread using rseq_finish*()
+ * at least once between their last rseq_finish*() and library unload of the
+ * library defining the rseq critical section (struct rseq_cs). This also
+ * applies to use of rseq in code generated by JIT: rseq_prepare_unload()
+ * should be invoked at least once by each thread using rseq_finish*() before
+ * reclaim of the memory holding the struct rseq_cs.
+ */
+static inline void rseq_prepare_unload(void)
+{
+ __rseq_abi.rseq_cs = 0;
+}
+
+#endif /* RSEQ_H_ */
--
2.11.0
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7 years
- 1
- 0
[RFC PATCH for 4.18 17/23] cpu_opv: selftests: Implement selftests (v7)
by Mathieu Desnoyers
Implement cpu_opv selftests. It needs to express dependencies on
header files and .so, which require to override the selftests
lib.mk targets. Use OVERRIDE_TARGETS define for this.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
Acked-by: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
Changes since v1:
- Expose similar library API as rseq: Expose library API closely
matching the rseq APIs, following removal of the event counter from
the rseq kernel API.
- Update makefile to fix make run_tests dependency on "all".
- Introduce a OVERRIDE_TARGETS.
Changes since v2:
- Test page faults.
Changes since v3:
- Move lib.mk OVERRIDE_TARGETS change to its own patch.
- Printout TAP output.
Changes since v4:
- Retry internally within cpu_op_cmpnev_storeoffp_load().
Changes since v5:
- Test huge pages.
Change since v6:
- Test CPU_OP_NR_FLAG,
- Invoke ksft_test_result_fail rather than ksft_exit_fail_msg,
- Test CPU parameter outside of possible CPUs range,
- Test CPU parameter outside of allowed CPUs.
---
MAINTAINERS | 1 +
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/cpu-opv/.gitignore | 1 +
tools/testing/selftests/cpu-opv/Makefile | 17 +
.../testing/selftests/cpu-opv/basic_cpu_opv_test.c | 1368 ++++++++++++++++++++
tools/testing/selftests/cpu-opv/cpu-op.c | 352 +++++
tools/testing/selftests/cpu-opv/cpu-op.h | 59 +
7 files changed, 1799 insertions(+)
create mode 100644 tools/testing/selftests/cpu-opv/.gitignore
create mode 100644 tools/testing/selftests/cpu-opv/Makefile
create mode 100644 tools/testing/selftests/cpu-opv/basic_cpu_opv_test.c
create mode 100644 tools/testing/selftests/cpu-opv/cpu-op.c
create mode 100644 tools/testing/selftests/cpu-opv/cpu-op.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 7ab90224634c..adbe93ed27b9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3750,6 +3750,7 @@ L: linux-kernel(a)vger.kernel.org
S: Supported
F: kernel/cpu_opv.c
F: include/uapi/linux/cpu_opv.h
+F: tools/testing/selftests/cpu-opv/
CRAMFS FILESYSTEM
M: Nicolas Pitre <nico(a)linaro.org>
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 7442dfb73b7f..1322e63f5963 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -5,6 +5,7 @@ TARGETS += breakpoints
TARGETS += capabilities
TARGETS += cpufreq
TARGETS += cpu-hotplug
+TARGETS += cpu-opv
TARGETS += efivarfs
TARGETS += exec
TARGETS += firmware
diff --git a/tools/testing/selftests/cpu-opv/.gitignore b/tools/testing/selftests/cpu-opv/.gitignore
new file mode 100644
index 000000000000..c7186eb95cf5
--- /dev/null
+++ b/tools/testing/selftests/cpu-opv/.gitignore
@@ -0,0 +1 @@
+basic_cpu_opv_test
diff --git a/tools/testing/selftests/cpu-opv/Makefile b/tools/testing/selftests/cpu-opv/Makefile
new file mode 100644
index 000000000000..21e63545d521
--- /dev/null
+++ b/tools/testing/selftests/cpu-opv/Makefile
@@ -0,0 +1,17 @@
+CFLAGS += -O2 -Wall -g -I./ -I../../../../usr/include/ -L./ -Wl,-rpath=./
+
+# Own dependencies because we only want to build against 1st prerequisite, but
+# still track changes to header files and depend on shared object.
+OVERRIDE_TARGETS = 1
+
+TEST_GEN_PROGS = basic_cpu_opv_test
+
+TEST_GEN_PROGS_EXTENDED = libcpu-op.so
+
+include ../lib.mk
+
+$(OUTPUT)/libcpu-op.so: cpu-op.c cpu-op.h
+ $(CC) $(CFLAGS) -shared -fPIC $< -o $@
+
+$(OUTPUT)/%: %.c $(TEST_GEN_PROGS_EXTENDED) cpu-op.h
+ $(CC) $(CFLAGS) $< -lcpu-op -o $@
diff --git a/tools/testing/selftests/cpu-opv/basic_cpu_opv_test.c b/tools/testing/selftests/cpu-opv/basic_cpu_opv_test.c
new file mode 100644
index 000000000000..792b68f4f330
--- /dev/null
+++ b/tools/testing/selftests/cpu-opv/basic_cpu_opv_test.c
@@ -0,0 +1,1368 @@
+/*
+ * Basic test coverage for cpu_opv system call.
+ */
+
+#define _GNU_SOURCE
+#include <assert.h>
+#include <sched.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <sched.h>
+
+#include "../kselftest.h"
+
+#include "cpu-op.h"
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+#define TESTBUFLEN 4096
+#define TESTBUFLEN_CMP 16
+
+#define TESTBUFLEN_PAGE_MAX 65536
+
+#define NR_PF_ARRAY 16384
+#define PF_ARRAY_LEN 4096
+
+#define NR_HUGE_ARRAY 512
+#define HUGEMAPLEN (NR_HUGE_ARRAY * PF_ARRAY_LEN)
+
+/* 64 MB arrays for page fault testing. */
+char pf_array_dst[NR_PF_ARRAY][PF_ARRAY_LEN];
+char pf_array_src[NR_PF_ARRAY][PF_ARRAY_LEN];
+
+static int test_ops_supported(void)
+{
+ const char *test_name = "test_ops_supported";
+ int ret;
+
+ ret = cpu_opv(NULL, 0, -1, CPU_OP_NR_FLAG);
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret < NR_CPU_OPS) {
+ ksft_test_result_fail("%s test: only %d operations supported, expecting at least %d\n",
+ test_name, ret, NR_CPU_OPS);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_compare_eq_op(char *a, char *b, size_t len)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.a, a),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.b, b),
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_compare_eq_same(void)
+{
+ int i, ret;
+ char buf1[TESTBUFLEN];
+ char buf2[TESTBUFLEN];
+ const char *test_name = "test_compare_eq same";
+
+ /* Test compare_eq */
+ for (i = 0; i < TESTBUFLEN; i++)
+ buf1[i] = (char)i;
+ for (i = 0; i < TESTBUFLEN; i++)
+ buf2[i] = (char)i;
+ ret = test_compare_eq_op(buf2, buf1, TESTBUFLEN);
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret > 0) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, ret, 0);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_compare_eq_diff(void)
+{
+ int i, ret;
+ char buf1[TESTBUFLEN];
+ char buf2[TESTBUFLEN];
+ const char *test_name = "test_compare_eq different";
+
+ for (i = 0; i < TESTBUFLEN; i++)
+ buf1[i] = (char)i;
+ memset(buf2, 0, TESTBUFLEN);
+ ret = test_compare_eq_op(buf2, buf1, TESTBUFLEN);
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret == 0) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, ret, 1);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_compare_ne_op(char *a, char *b, size_t len)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_COMPARE_NE_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.a, a),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.b, b),
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_compare_ne_same(void)
+{
+ int i, ret;
+ char buf1[TESTBUFLEN];
+ char buf2[TESTBUFLEN];
+ const char *test_name = "test_compare_ne same";
+
+ /* Test compare_ne */
+ for (i = 0; i < TESTBUFLEN; i++)
+ buf1[i] = (char)i;
+ for (i = 0; i < TESTBUFLEN; i++)
+ buf2[i] = (char)i;
+ ret = test_compare_ne_op(buf2, buf1, TESTBUFLEN);
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret == 0) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, ret, 1);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_compare_ne_diff(void)
+{
+ int i, ret;
+ char buf1[TESTBUFLEN];
+ char buf2[TESTBUFLEN];
+ const char *test_name = "test_compare_ne different";
+
+ for (i = 0; i < TESTBUFLEN; i++)
+ buf1[i] = (char)i;
+ memset(buf2, 0, TESTBUFLEN);
+ ret = test_compare_ne_op(buf2, buf1, TESTBUFLEN);
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret != 0) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, ret, 0);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_2compare_eq_op(char *a, char *b, char *c, char *d,
+ size_t len)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.a, a),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.b, b),
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ [1] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.a, c),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.b, d),
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_2compare_eq_index(void)
+{
+ int i, ret;
+ char buf1[TESTBUFLEN_CMP];
+ char buf2[TESTBUFLEN_CMP];
+ char buf3[TESTBUFLEN_CMP];
+ char buf4[TESTBUFLEN_CMP];
+ const char *test_name = "test_2compare_eq index";
+
+ for (i = 0; i < TESTBUFLEN_CMP; i++)
+ buf1[i] = (char)i;
+ memset(buf2, 0, TESTBUFLEN_CMP);
+ memset(buf3, 0, TESTBUFLEN_CMP);
+ memset(buf4, 0, TESTBUFLEN_CMP);
+
+ /* First compare failure is op[0], expect 1. */
+ ret = test_2compare_eq_op(buf2, buf1, buf4, buf3, TESTBUFLEN_CMP);
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret != 1) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, ret, 1);
+ return -1;
+ }
+
+ /* All compares succeed. */
+ for (i = 0; i < TESTBUFLEN_CMP; i++)
+ buf2[i] = (char)i;
+ ret = test_2compare_eq_op(buf2, buf1, buf4, buf3, TESTBUFLEN_CMP);
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret != 0) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, ret, 0);
+ return -1;
+ }
+
+ /* First compare failure is op[1], expect 2. */
+ for (i = 0; i < TESTBUFLEN_CMP; i++)
+ buf3[i] = (char)i;
+ ret = test_2compare_eq_op(buf2, buf1, buf4, buf3, TESTBUFLEN_CMP);
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret != 2) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, ret, 2);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_2compare_ne_op(char *a, char *b, char *c, char *d,
+ size_t len)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_COMPARE_NE_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.a, a),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.b, b),
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ [1] = {
+ .op = CPU_COMPARE_NE_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.a, c),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.compare_op.b, d),
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_2compare_ne_index(void)
+{
+ int i, ret;
+ char buf1[TESTBUFLEN_CMP];
+ char buf2[TESTBUFLEN_CMP];
+ char buf3[TESTBUFLEN_CMP];
+ char buf4[TESTBUFLEN_CMP];
+ const char *test_name = "test_2compare_ne index";
+
+ memset(buf1, 0, TESTBUFLEN_CMP);
+ memset(buf2, 0, TESTBUFLEN_CMP);
+ memset(buf3, 0, TESTBUFLEN_CMP);
+ memset(buf4, 0, TESTBUFLEN_CMP);
+
+ /* First compare ne failure is op[0], expect 1. */
+ ret = test_2compare_ne_op(buf2, buf1, buf4, buf3, TESTBUFLEN_CMP);
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret != 1) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, ret, 1);
+ return -1;
+ }
+
+ /* All compare ne succeed. */
+ for (i = 0; i < TESTBUFLEN_CMP; i++)
+ buf1[i] = (char)i;
+ for (i = 0; i < TESTBUFLEN_CMP; i++)
+ buf3[i] = (char)i;
+ ret = test_2compare_ne_op(buf2, buf1, buf4, buf3, TESTBUFLEN_CMP);
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret != 0) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, ret, 0);
+ return -1;
+ }
+
+ /* First compare failure is op[1], expect 2. */
+ for (i = 0; i < TESTBUFLEN_CMP; i++)
+ buf4[i] = (char)i;
+ ret = test_2compare_ne_op(buf2, buf1, buf4, buf3, TESTBUFLEN_CMP);
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret != 2) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, ret, 2);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_memcpy_op(void *dst, void *src, size_t len)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_MEMCPY_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.dst, dst),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.src, src),
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_memcpy(void)
+{
+ int i, ret;
+ char buf1[TESTBUFLEN];
+ char buf2[TESTBUFLEN];
+ const char *test_name = "test_memcpy";
+
+ /* Test memcpy */
+ for (i = 0; i < TESTBUFLEN; i++)
+ buf1[i] = (char)i;
+ memset(buf2, 0, TESTBUFLEN);
+ ret = test_memcpy_op(buf2, buf1, TESTBUFLEN);
+ if (ret) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ for (i = 0; i < TESTBUFLEN; i++) {
+ if (buf2[i] != (char)i) {
+ ksft_test_result_fail("%s test: unexpected value at offset %d. Found %d. Should be %d.\n",
+ test_name, i, buf2[i], (char)i);
+ return -1;
+ }
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_memcpy_u32(void)
+{
+ int ret;
+ uint32_t v1, v2;
+ const char *test_name = "test_memcpy_u32";
+
+ /* Test memcpy_u32 */
+ v1 = 42;
+ v2 = 0;
+ ret = test_memcpy_op(&v2, &v1, sizeof(v1));
+ if (ret) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (v1 != v2) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, v2, v1);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_memcpy_mb_memcpy_op(void *dst1, void *src1,
+ void *dst2, void *src2, size_t len)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_MEMCPY_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.dst, dst1),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.src, src1),
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ [1] = {
+ .op = CPU_MB_OP,
+ },
+ [2] = {
+ .op = CPU_MEMCPY_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.dst, dst2),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.src, src2),
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_memcpy_mb_memcpy(void)
+{
+ int ret;
+ int v1, v2, v3;
+ const char *test_name = "test_memcpy_mb_memcpy";
+
+ /* Test memcpy */
+ v1 = 42;
+ v2 = v3 = 0;
+ ret = test_memcpy_mb_memcpy_op(&v2, &v1, &v3, &v2, sizeof(int));
+ if (ret) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (v3 != v1) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, v3, v1);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_add_op(int *v, int64_t increment)
+{
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_op_add(v, increment, sizeof(*v), cpu);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_add(void)
+{
+ int orig_v = 42, v, ret;
+ int increment = 1;
+ const char *test_name = "test_add";
+
+ v = orig_v;
+ ret = test_add_op(&v, increment);
+ if (ret) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (v != orig_v + increment) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, v,
+ orig_v + increment);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_two_add_op(int *v, int64_t *increments)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_ADD_OP,
+ .len = sizeof(*v),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(
+ .u.arithmetic_op.p, v),
+ .u.arithmetic_op.count = increments[0],
+ .u.arithmetic_op.expect_fault_p = 0,
+ },
+ [1] = {
+ .op = CPU_ADD_OP,
+ .len = sizeof(*v),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(
+ .u.arithmetic_op.p, v),
+ .u.arithmetic_op.count = increments[1],
+ .u.arithmetic_op.expect_fault_p = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_two_add(void)
+{
+ int orig_v = 42, v, ret;
+ int64_t increments[2] = { 99, 123 };
+ const char *test_name = "test_two_add";
+
+ v = orig_v;
+ ret = test_two_add_op(&v, increments);
+ if (ret) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (v != orig_v + increments[0] + increments[1]) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, v,
+ orig_v + increments[0] + increments[1]);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_or_op(int *v, uint64_t mask)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_OR_OP,
+ .len = sizeof(*v),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(
+ .u.bitwise_op.p, v),
+ .u.bitwise_op.mask = mask,
+ .u.bitwise_op.expect_fault_p = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_or(void)
+{
+ int orig_v = 0xFF00000, v, ret;
+ uint32_t mask = 0xFFF;
+ const char *test_name = "test_or";
+
+ v = orig_v;
+ ret = test_or_op(&v, mask);
+ if (ret) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (v != (orig_v | mask)) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, v, orig_v | mask);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_and_op(int *v, uint64_t mask)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_AND_OP,
+ .len = sizeof(*v),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(
+ .u.bitwise_op.p, v),
+ .u.bitwise_op.mask = mask,
+ .u.bitwise_op.expect_fault_p = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_and(void)
+{
+ int orig_v = 0xF00, v, ret;
+ uint32_t mask = 0xFFF;
+ const char *test_name = "test_and";
+
+ v = orig_v;
+ ret = test_and_op(&v, mask);
+ if (ret) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (v != (orig_v & mask)) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, v, orig_v & mask);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_xor_op(int *v, uint64_t mask)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_XOR_OP,
+ .len = sizeof(*v),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(
+ .u.bitwise_op.p, v),
+ .u.bitwise_op.mask = mask,
+ .u.bitwise_op.expect_fault_p = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_xor(void)
+{
+ int orig_v = 0xF00, v, ret;
+ uint32_t mask = 0xFFF;
+ const char *test_name = "test_xor";
+
+ v = orig_v;
+ ret = test_xor_op(&v, mask);
+ if (ret) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (v != (orig_v ^ mask)) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, v, orig_v ^ mask);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_lshift_op(int *v, uint32_t bits)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_LSHIFT_OP,
+ .len = sizeof(*v),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(
+ .u.shift_op.p, v),
+ .u.shift_op.bits = bits,
+ .u.shift_op.expect_fault_p = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_lshift(void)
+{
+ int orig_v = 0xF00, v, ret;
+ uint32_t bits = 5;
+ const char *test_name = "test_lshift";
+
+ v = orig_v;
+ ret = test_lshift_op(&v, bits);
+ if (ret) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (v != (orig_v << bits)) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, v, orig_v << bits);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_rshift_op(int *v, uint32_t bits)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_RSHIFT_OP,
+ .len = sizeof(*v),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(
+ .u.shift_op.p, v),
+ .u.shift_op.bits = bits,
+ .u.shift_op.expect_fault_p = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_rshift(void)
+{
+ int orig_v = 0xF00, v, ret;
+ uint32_t bits = 5;
+ const char *test_name = "test_rshift";
+
+ v = orig_v;
+ ret = test_rshift_op(&v, bits);
+ if (ret) {
+ ksft_test_result_fail("%s test: returned with %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (v != (orig_v >> bits)) {
+ ksft_test_result_fail("%s test: unexpected value %d. Should be %d.\n",
+ test_name, v, orig_v >> bits);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_cmpxchg_op(void *v, void *expect, void *old, void *n,
+ size_t len)
+{
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_op_cmpxchg(v, expect, old, n, len, cpu);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_cmpxchg_success(void)
+{
+ int ret;
+ uint64_t orig_v = 1, v, expect = 1, old = 0, n = 3;
+ const char *test_name = "test_cmpxchg success";
+
+ v = orig_v;
+ ret = test_cmpxchg_op(&v, &expect, &old, &n, sizeof(uint64_t));
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret) {
+ ksft_test_result_fail("%s returned %d, expecting %d\n",
+ test_name, ret, 0);
+ return -1;
+ }
+ if (v != n) {
+ ksft_test_result_fail("%s v is %lld, expecting %lld\n",
+ test_name, (long long)v, (long long)n);
+ return -1;
+ }
+ if (old != orig_v) {
+ ksft_test_result_fail("%s old is %lld, expecting %lld\n",
+ test_name, (long long)old,
+ (long long)orig_v);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_cmpxchg_fail(void)
+{
+ int ret;
+ uint64_t orig_v = 1, v, expect = 123, old = 0, n = 3;
+ const char *test_name = "test_cmpxchg fail";
+
+ v = orig_v;
+ ret = test_cmpxchg_op(&v, &expect, &old, &n, sizeof(uint64_t));
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (ret == 0) {
+ ksft_test_result_fail("%s returned %d, expecting %d\n",
+ test_name, ret, 1);
+ return -1;
+ }
+ if (v == n) {
+ ksft_test_result_fail("%s returned %lld, expecting %lld\n",
+ test_name, (long long)v,
+ (long long)orig_v);
+ return -1;
+ }
+ if (old != orig_v) {
+ ksft_test_result_fail("%s old is %lld, expecting %lld\n",
+ test_name, (long long)old,
+ (long long)orig_v);
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_memcpy_expect_fault_op(void *dst, void *src, size_t len)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_MEMCPY_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.dst, dst),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.src, src),
+ .u.memcpy_op.expect_fault_dst = 0,
+ /* Return EAGAIN on fault. */
+ .u.memcpy_op.expect_fault_src = 1,
+ },
+ };
+ int cpu;
+
+ cpu = cpu_op_get_current_cpu();
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+static int test_memcpy_fault(void)
+{
+ int ret;
+ char buf1[TESTBUFLEN];
+ const char *test_name = "test_memcpy_fault";
+
+ /* Test memcpy */
+ ret = test_memcpy_op(buf1, NULL, TESTBUFLEN);
+ if (!ret || (ret < 0 && errno != EFAULT)) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ /* Test memcpy expect fault */
+ ret = test_memcpy_expect_fault_op(buf1, NULL, TESTBUFLEN);
+ if (!ret || (ret < 0 && errno != EAGAIN)) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int do_test_unknown_op(void)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = -1, /* Unknown */
+ .len = 0,
+ },
+ };
+ int cpu;
+
+ cpu = cpu_op_get_current_cpu();
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+static int test_unknown_op(void)
+{
+ int ret;
+ const char *test_name = "test_unknown_op";
+
+ ret = do_test_unknown_op();
+ if (!ret || (ret < 0 && errno != EINVAL)) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int do_test_max_ops(void)
+{
+ struct cpu_op opvec[] = {
+ [0] = { .op = CPU_MB_OP, },
+ [1] = { .op = CPU_MB_OP, },
+ [2] = { .op = CPU_MB_OP, },
+ [3] = { .op = CPU_MB_OP, },
+ [4] = { .op = CPU_MB_OP, },
+ [5] = { .op = CPU_MB_OP, },
+ [6] = { .op = CPU_MB_OP, },
+ [7] = { .op = CPU_MB_OP, },
+ [8] = { .op = CPU_MB_OP, },
+ [9] = { .op = CPU_MB_OP, },
+ [10] = { .op = CPU_MB_OP, },
+ [11] = { .op = CPU_MB_OP, },
+ [12] = { .op = CPU_MB_OP, },
+ [13] = { .op = CPU_MB_OP, },
+ [14] = { .op = CPU_MB_OP, },
+ [15] = { .op = CPU_MB_OP, },
+ };
+ int cpu;
+
+ cpu = cpu_op_get_current_cpu();
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+static int test_max_ops(void)
+{
+ int ret;
+ const char *test_name = "test_max_ops";
+
+ ret = do_test_max_ops();
+ if (ret < 0) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int do_test_too_many_ops(void)
+{
+ struct cpu_op opvec[] = {
+ [0] = { .op = CPU_MB_OP, },
+ [1] = { .op = CPU_MB_OP, },
+ [2] = { .op = CPU_MB_OP, },
+ [3] = { .op = CPU_MB_OP, },
+ [4] = { .op = CPU_MB_OP, },
+ [5] = { .op = CPU_MB_OP, },
+ [6] = { .op = CPU_MB_OP, },
+ [7] = { .op = CPU_MB_OP, },
+ [8] = { .op = CPU_MB_OP, },
+ [9] = { .op = CPU_MB_OP, },
+ [10] = { .op = CPU_MB_OP, },
+ [11] = { .op = CPU_MB_OP, },
+ [12] = { .op = CPU_MB_OP, },
+ [13] = { .op = CPU_MB_OP, },
+ [14] = { .op = CPU_MB_OP, },
+ [15] = { .op = CPU_MB_OP, },
+ [16] = { .op = CPU_MB_OP, },
+ };
+ int cpu;
+
+ cpu = cpu_op_get_current_cpu();
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+static int test_too_many_ops(void)
+{
+ int ret;
+ const char *test_name = "test_too_many_ops";
+
+ ret = do_test_too_many_ops();
+ if (!ret || (ret < 0 && errno != EINVAL)) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+/* Use 64kB len, largest page size known on Linux. */
+static int test_memcpy_single_too_large(void)
+{
+ int i, ret;
+ char buf1[TESTBUFLEN_PAGE_MAX + 1];
+ char buf2[TESTBUFLEN_PAGE_MAX + 1];
+ const char *test_name = "test_memcpy_single_too_large";
+
+ /* Test memcpy */
+ for (i = 0; i < TESTBUFLEN_PAGE_MAX + 1; i++)
+ buf1[i] = (char)i;
+ memset(buf2, 0, TESTBUFLEN_PAGE_MAX + 1);
+ ret = test_memcpy_op(buf2, buf1, TESTBUFLEN_PAGE_MAX + 1);
+ if (!ret || (ret < 0 && errno != EINVAL)) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+static int test_memcpy_single_ok_sum_too_large_op(void *dst, void *src,
+ size_t len)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_MEMCPY_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.dst, dst),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.src, src),
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ [1] = {
+ .op = CPU_MEMCPY_OP,
+ .len = len,
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.dst, dst),
+ LINUX_FIELD_u32_u64_INIT_ONSTACK(.u.memcpy_op.src, src),
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ };
+ int ret, cpu;
+
+ do {
+ cpu = cpu_op_get_current_cpu();
+ ret = cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_memcpy_single_ok_sum_too_large(void)
+{
+ int i, ret;
+ char buf1[TESTBUFLEN];
+ char buf2[TESTBUFLEN];
+ const char *test_name = "test_memcpy_single_ok_sum_too_large";
+
+ /* Test memcpy */
+ for (i = 0; i < TESTBUFLEN; i++)
+ buf1[i] = (char)i;
+ memset(buf2, 0, TESTBUFLEN);
+ ret = test_memcpy_single_ok_sum_too_large_op(buf2, buf1, TESTBUFLEN);
+ if (!ret || (ret < 0 && errno != EINVAL)) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+/*
+ * Iterate over large uninitialized arrays to trigger page faults.
+ * This includes reading from zero pages.
+ */
+int test_page_fault(void)
+{
+ int ret = 0;
+ uint64_t i;
+ const char *test_name = "test_page_fault";
+
+ for (i = 0; i < NR_PF_ARRAY; i++) {
+ ret = test_memcpy_op(pf_array_dst[i],
+ pf_array_src[i],
+ PF_ARRAY_LEN);
+ if (ret) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return ret;
+ }
+ }
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+}
+
+/*
+ * Try to use 2MB huge pages.
+ */
+int test_hugetlb(void)
+{
+ int ret = 0;
+ uint64_t i;
+ const char *test_name = "test_hugetlb";
+ int *dst, *src;
+
+ dst = mmap(NULL, HUGEMAPLEN, PROT_READ | PROT_WRITE,
+ MAP_HUGETLB | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+ if (dst == MAP_FAILED) {
+ switch (errno) {
+ case ENOMEM:
+ case ENOENT:
+ case EINVAL:
+ ksft_test_result_skip("%s test.\n", test_name);
+ goto end;
+ default:
+ break;
+ }
+ perror("mmap");
+ abort();
+ }
+ src = mmap(NULL, HUGEMAPLEN, PROT_READ | PROT_WRITE,
+ MAP_HUGETLB | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+ if (src == MAP_FAILED) {
+ if (errno == ENOMEM) {
+ ksft_test_result_skip("%s test.\n", test_name);
+ goto unmap_dst;
+ }
+ perror("mmap");
+ abort();
+ }
+
+ /* Read/write from/to huge zero pages. */
+ for (i = 0; i < NR_HUGE_ARRAY; i++) {
+ ret = test_memcpy_op(dst + (i * PF_ARRAY_LEN / sizeof(int)),
+ src + (i * PF_ARRAY_LEN / sizeof(int)),
+ PF_ARRAY_LEN);
+ if (ret) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return ret;
+ }
+ }
+ for (i = 0; i < NR_HUGE_ARRAY * (PF_ARRAY_LEN / sizeof(int)); i++)
+ src[i] = i;
+
+ for (i = 0; i < NR_HUGE_ARRAY; i++) {
+ ret = test_memcpy_op(dst + (i * PF_ARRAY_LEN / sizeof(int)),
+ src + (i * PF_ARRAY_LEN / sizeof(int)),
+ PF_ARRAY_LEN);
+ if (ret) {
+ ksft_test_result_fail("%s test: ret = %d, errno = %s\n",
+ test_name, ret, strerror(errno));
+ return ret;
+ }
+ }
+
+ for (i = 0; i < NR_HUGE_ARRAY * (PF_ARRAY_LEN / sizeof(int)); i++) {
+ if (dst[i] != i) {
+ ksft_test_result_fail("%s mismatch, expect %d, got %d\n",
+ test_name, i, dst[i]);
+ return ret;
+ }
+ }
+
+ ksft_test_result_pass("%s test\n", test_name);
+
+ if (munmap(src, HUGEMAPLEN)) {
+ perror("munmap");
+ abort();
+ }
+unmap_dst:
+ if (munmap(dst, HUGEMAPLEN)) {
+ perror("munmap");
+ abort();
+ }
+end:
+ return 0;
+}
+
+static int test_cmpxchg_op_cpu(void *v, void *expect, void *old, void *n,
+ size_t len, int cpu)
+{
+ int ret;
+
+ do {
+ ret = cpu_op_cmpxchg(v, expect, old, n, len, cpu);
+ } while (ret == -1 && errno == EAGAIN);
+
+ return ret;
+}
+
+static int test_over_possible_cpu(void)
+{
+ int ret;
+ uint64_t orig_v = 1, v, expect = 1, old = 0, n = 3;
+ const char *test_name = "test_over_possible_cpu";
+
+ v = orig_v;
+ ret = test_cmpxchg_op_cpu(&v, &expect, &old, &n, sizeof(uint64_t),
+ 0xFFFFFFFF);
+ if (ret == 0) {
+ ksft_test_result_fail("%s test: ret = %d\n",
+ test_name, ret);
+ return -1;
+ }
+ if (ret < 0 && errno == EINVAL) {
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+ }
+ ksft_test_result_fail("%s returned %d, errno %s, expecting %d, errno %s\n",
+ test_name, ret, strerror(errno),
+ 0, strerror(EINVAL));
+ return -1;
+}
+
+static int test_allowed_affinity(void)
+{
+ int ret;
+ uint64_t orig_v = 1, v, expect = 1, old = 0, n = 3;
+ const char *test_name = "test_allowed_affinity";
+ cpu_set_t allowed_cpus, cpuset;
+
+ ret = sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
+ if (ret) {
+ ksft_test_result_fail("%s returned %d, errno %s\n",
+ test_name, ret, strerror(errno));
+ return -1;
+ }
+ if (!(CPU_ISSET(0, &allowed_cpus) && CPU_ISSET(1, &allowed_cpus))) {
+ ksft_test_result_skip("%s test. Requiring allowed CPUs 0 and 1.\n",
+ test_name);
+ return 0;
+ }
+ CPU_ZERO(&cpuset);
+ CPU_SET(0, &cpuset);
+ if (sched_setaffinity(0, sizeof(cpuset), &cpuset) != 0) {
+ ksft_test_result_fail("%s test. Unable to set affinity. errno = %s\n",
+ test_name, strerror(errno));
+ return -1;
+ }
+ v = orig_v;
+ ret = test_cmpxchg_op_cpu(&v, &expect, &old, &n, sizeof(uint64_t),
+ 1);
+ if (sched_setaffinity(0, sizeof(allowed_cpus), &allowed_cpus) != 0) {
+ ksft_test_result_fail("%s test. Unable to set affinity. errno = %s\n",
+ test_name, strerror(errno));
+ return -1;
+ }
+ if (ret == 0) {
+ ksft_test_result_fail("%s test: ret = %d\n",
+ test_name, ret);
+ return -1;
+ }
+
+ if (ret < 0 && errno == EINVAL) {
+ ksft_test_result_pass("%s test\n", test_name);
+ return 0;
+ }
+ ksft_test_result_fail("%s returned %d, errno %s, expecting %d, errno %s\n",
+ test_name, ret, strerror(errno),
+ 0, strerror(EINVAL));
+ return -1;
+}
+
+int main(int argc, char **argv)
+{
+ ksft_print_header();
+
+ test_ops_supported();
+ test_compare_eq_same();
+ test_compare_eq_diff();
+ test_compare_ne_same();
+ test_compare_ne_diff();
+ test_2compare_eq_index();
+ test_2compare_ne_index();
+ test_memcpy();
+ test_memcpy_u32();
+ test_memcpy_mb_memcpy();
+ test_add();
+ test_two_add();
+ test_or();
+ test_and();
+ test_xor();
+ test_lshift();
+ test_rshift();
+ test_cmpxchg_success();
+ test_cmpxchg_fail();
+ test_memcpy_fault();
+ test_unknown_op();
+ test_max_ops();
+ test_too_many_ops();
+ test_memcpy_single_too_large();
+ test_memcpy_single_ok_sum_too_large();
+ test_page_fault();
+ test_hugetlb();
+ test_over_possible_cpu();
+ test_allowed_affinity();
+
+ return ksft_exit_pass();
+}
diff --git a/tools/testing/selftests/cpu-opv/cpu-op.c b/tools/testing/selftests/cpu-opv/cpu-op.c
new file mode 100644
index 000000000000..5981895df25a
--- /dev/null
+++ b/tools/testing/selftests/cpu-opv/cpu-op.c
@@ -0,0 +1,352 @@
+/*
+ * cpu-op.c
+ *
+ * Copyright (C) 2017 Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ */
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <syscall.h>
+#include <assert.h>
+#include <signal.h>
+
+#include "cpu-op.h"
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+#define ACCESS_ONCE(x) (*(__volatile__ __typeof__(x) *)&(x))
+#define WRITE_ONCE(x, v) __extension__ ({ ACCESS_ONCE(x) = (v); })
+#define READ_ONCE(x) ACCESS_ONCE(x)
+
+int cpu_opv(struct cpu_op *cpu_opv, int cpuopcnt, int cpu, int flags)
+{
+ return syscall(__NR_cpu_opv, cpu_opv, cpuopcnt, cpu, flags);
+}
+
+int cpu_op_get_current_cpu(void)
+{
+ int cpu;
+
+ cpu = sched_getcpu();
+ if (cpu < 0) {
+ perror("sched_getcpu()");
+ abort();
+ }
+ return cpu;
+}
+
+int cpu_op_cmpxchg(void *v, void *expect, void *old, void *n, size_t len,
+ int cpu)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_MEMCPY_OP,
+ .len = len,
+ .u.memcpy_op.dst = (unsigned long)old,
+ .u.memcpy_op.src = (unsigned long)v,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ [1] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = len,
+ .u.compare_op.a = (unsigned long)v,
+ .u.compare_op.b = (unsigned long)expect,
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ [2] = {
+ .op = CPU_MEMCPY_OP,
+ .len = len,
+ .u.memcpy_op.dst = (unsigned long)v,
+ .u.memcpy_op.src = (unsigned long)n,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ };
+
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+int cpu_op_add(void *v, int64_t count, size_t len, int cpu)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_ADD_OP,
+ .len = len,
+ .u.arithmetic_op.p = (unsigned long)v,
+ .u.arithmetic_op.count = count,
+ .u.arithmetic_op.expect_fault_p = 0,
+ },
+ };
+
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+int cpu_op_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv,
+ int cpu)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = sizeof(intptr_t),
+ .u.compare_op.a = (unsigned long)v,
+ .u.compare_op.b = (unsigned long)&expect,
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ [1] = {
+ .op = CPU_MEMCPY_OP,
+ .len = sizeof(intptr_t),
+ .u.memcpy_op.dst = (unsigned long)v,
+ .u.memcpy_op.src = (unsigned long)&newv,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ };
+
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+static int cpu_op_cmpeqv_storep_expect_fault(intptr_t *v, intptr_t expect,
+ intptr_t *newp, int cpu)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = sizeof(intptr_t),
+ .u.compare_op.a = (unsigned long)v,
+ .u.compare_op.b = (unsigned long)&expect,
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ [1] = {
+ .op = CPU_MEMCPY_OP,
+ .len = sizeof(intptr_t),
+ .u.memcpy_op.dst = (unsigned long)v,
+ .u.memcpy_op.src = (unsigned long)newp,
+ .u.memcpy_op.expect_fault_dst = 0,
+ /* Return EAGAIN on src fault. */
+ .u.memcpy_op.expect_fault_src = 1,
+ },
+ };
+
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+int cpu_op_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu)
+{
+ int ret;
+
+ do {
+ intptr_t oldv = READ_ONCE(*v);
+ intptr_t *newp = (intptr_t *)(oldv + voffp);
+
+ if (oldv == expectnot)
+ return 1;
+ ret = cpu_op_cmpeqv_storep_expect_fault(v, oldv, newp, cpu);
+ if (!ret) {
+ *load = oldv;
+ return 0;
+ }
+ } while (ret > 0);
+
+ return -1;
+}
+
+int cpu_op_cmpeqv_storev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = sizeof(intptr_t),
+ .u.compare_op.a = (unsigned long)v,
+ .u.compare_op.b = (unsigned long)&expect,
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ [1] = {
+ .op = CPU_MEMCPY_OP,
+ .len = sizeof(intptr_t),
+ .u.memcpy_op.dst = (unsigned long)v2,
+ .u.memcpy_op.src = (unsigned long)&newv2,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ [2] = {
+ .op = CPU_MEMCPY_OP,
+ .len = sizeof(intptr_t),
+ .u.memcpy_op.dst = (unsigned long)v,
+ .u.memcpy_op.src = (unsigned long)&newv,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ };
+
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+int cpu_op_cmpeqv_storev_mb_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = sizeof(intptr_t),
+ .u.compare_op.a = (unsigned long)v,
+ .u.compare_op.b = (unsigned long)&expect,
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ [1] = {
+ .op = CPU_MEMCPY_OP,
+ .len = sizeof(intptr_t),
+ .u.memcpy_op.dst = (unsigned long)v2,
+ .u.memcpy_op.src = (unsigned long)&newv2,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ [2] = {
+ .op = CPU_MB_OP,
+ },
+ [3] = {
+ .op = CPU_MEMCPY_OP,
+ .len = sizeof(intptr_t),
+ .u.memcpy_op.dst = (unsigned long)v,
+ .u.memcpy_op.src = (unsigned long)&newv,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ };
+
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+int cpu_op_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = sizeof(intptr_t),
+ .u.compare_op.a = (unsigned long)v,
+ .u.compare_op.b = (unsigned long)&expect,
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ [1] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = sizeof(intptr_t),
+ .u.compare_op.a = (unsigned long)v2,
+ .u.compare_op.b = (unsigned long)&expect2,
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ [2] = {
+ .op = CPU_MEMCPY_OP,
+ .len = sizeof(intptr_t),
+ .u.memcpy_op.dst = (unsigned long)v,
+ .u.memcpy_op.src = (unsigned long)&newv,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ };
+
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+int cpu_op_cmpeqv_memcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = sizeof(intptr_t),
+ .u.compare_op.a = (unsigned long)v,
+ .u.compare_op.b = (unsigned long)&expect,
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ [1] = {
+ .op = CPU_MEMCPY_OP,
+ .len = len,
+ .u.memcpy_op.dst = (unsigned long)dst,
+ .u.memcpy_op.src = (unsigned long)src,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ [2] = {
+ .op = CPU_MEMCPY_OP,
+ .len = sizeof(intptr_t),
+ .u.memcpy_op.dst = (unsigned long)v,
+ .u.memcpy_op.src = (unsigned long)&newv,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ };
+
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+int cpu_op_cmpeqv_memcpy_mb_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu)
+{
+ struct cpu_op opvec[] = {
+ [0] = {
+ .op = CPU_COMPARE_EQ_OP,
+ .len = sizeof(intptr_t),
+ .u.compare_op.a = (unsigned long)v,
+ .u.compare_op.b = (unsigned long)&expect,
+ .u.compare_op.expect_fault_a = 0,
+ .u.compare_op.expect_fault_b = 0,
+ },
+ [1] = {
+ .op = CPU_MEMCPY_OP,
+ .len = len,
+ .u.memcpy_op.dst = (unsigned long)dst,
+ .u.memcpy_op.src = (unsigned long)src,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ [2] = {
+ .op = CPU_MB_OP,
+ },
+ [3] = {
+ .op = CPU_MEMCPY_OP,
+ .len = sizeof(intptr_t),
+ .u.memcpy_op.dst = (unsigned long)v,
+ .u.memcpy_op.src = (unsigned long)&newv,
+ .u.memcpy_op.expect_fault_dst = 0,
+ .u.memcpy_op.expect_fault_src = 0,
+ },
+ };
+
+ return cpu_opv(opvec, ARRAY_SIZE(opvec), cpu, 0);
+}
+
+int cpu_op_addv(intptr_t *v, int64_t count, int cpu)
+{
+ return cpu_op_add(v, count, sizeof(intptr_t), cpu);
+}
diff --git a/tools/testing/selftests/cpu-opv/cpu-op.h b/tools/testing/selftests/cpu-opv/cpu-op.h
new file mode 100644
index 000000000000..762a38d6e0d0
--- /dev/null
+++ b/tools/testing/selftests/cpu-opv/cpu-op.h
@@ -0,0 +1,59 @@
+/*
+ * cpu-op.h
+ *
+ * (C) Copyright 2017 - Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef CPU_OPV_H
+#define CPU_OPV_H
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <linux/cpu_opv.h>
+
+int cpu_opv(struct cpu_op *cpuopv, int cpuopcnt, int cpu, int flags);
+int cpu_op_get_current_cpu(void);
+
+int cpu_op_cmpxchg(void *v, void *expect, void *old, void *_new, size_t len,
+ int cpu);
+int cpu_op_add(void *v, int64_t count, size_t len, int cpu);
+
+int cpu_op_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu);
+int cpu_op_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
+ off_t voffp, intptr_t *load, int cpu);
+int cpu_op_cmpeqv_storev_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu);
+int cpu_op_cmpeqv_storev_mb_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t newv2,
+ intptr_t newv, int cpu);
+int cpu_op_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
+ intptr_t *v2, intptr_t expect2,
+ intptr_t newv, int cpu);
+int cpu_op_cmpeqv_memcpy_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu);
+int cpu_op_cmpeqv_memcpy_mb_storev(intptr_t *v, intptr_t expect,
+ void *dst, void *src, size_t len,
+ intptr_t newv, int cpu);
+int cpu_op_addv(intptr_t *v, int64_t count, int cpu);
+
+#endif /* CPU_OPV_H_ */
--
2.11.0
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7 years
- 1
- 0
[RFC PATCH for 4.18 16/23] selftests: lib.mk: Introduce OVERRIDE_TARGETS
by Mathieu Desnoyers
Introduce OVERRIDE_TARGETS to allow tests to express dependencies on
header files and .so, which require to override the selftests lib.mk
targets.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
Acked-by: Shuah Khan <shuahkh(a)osg.samsung.com>
CC: Russell King <linux(a)arm.linux.org.uk>
CC: Catalin Marinas <catalin.marinas(a)arm.com>
CC: Will Deacon <will.deacon(a)arm.com>
CC: Thomas Gleixner <tglx(a)linutronix.de>
CC: Paul Turner <pjt(a)google.com>
CC: Andrew Hunter <ahh(a)google.com>
CC: Peter Zijlstra <peterz(a)infradead.org>
CC: Andy Lutomirski <luto(a)amacapital.net>
CC: Andi Kleen <andi(a)firstfloor.org>
CC: Dave Watson <davejwatson(a)fb.com>
CC: Chris Lameter <cl(a)linux.com>
CC: Ingo Molnar <mingo(a)redhat.com>
CC: "H. Peter Anvin" <hpa(a)zytor.com>
CC: Ben Maurer <bmaurer(a)fb.com>
CC: Steven Rostedt <rostedt(a)goodmis.org>
CC: "Paul E. McKenney" <paulmck(a)linux.vnet.ibm.com>
CC: Josh Triplett <josh(a)joshtriplett.org>
CC: Linus Torvalds <torvalds(a)linux-foundation.org>
CC: Andrew Morton <akpm(a)linux-foundation.org>
CC: Boqun Feng <boqun.feng(a)gmail.com>
CC: linux-kselftest(a)vger.kernel.org
CC: linux-api(a)vger.kernel.org
---
tools/testing/selftests/lib.mk | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 7de482a0519d..3d4bdeb072b2 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -105,6 +105,9 @@ COMPILE.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
LINK.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
endif
+# Selftest makefiles can override those targets by setting
+# OVERRIDE_TARGETS = 1.
+ifeq ($(OVERRIDE_TARGETS),)
$(OUTPUT)/%:%.c
$(LINK.c) $^ $(LDLIBS) -o $@
@@ -113,5 +116,6 @@ $(OUTPUT)/%.o:%.S
$(OUTPUT)/%:%.S
$(LINK.S) $^ $(LDLIBS) -o $@
+endif
.PHONY: run_tests all clean install emit_tests
--
2.11.0
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7 years
- 1
- 0
[PATCH] kvm: selftests: add -std=gnu99 cflags
by Peng Hao
lib/kvm_util.c: In function ‘kvm_memcmp_hva_gva’:
lib/kvm_util.c:332:2: error: ‘for’ loop initial declarations are only allowed in C99 mode
So add -std=gnu99 to CFLAGS
Signed-off-by: Peng Hao <peng.hao2(a)zte.com.cn>
---
tools/testing/selftests/kvm/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index dc44de9..1da541e 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -14,7 +14,7 @@ LIBKVM += $(LIBKVM_$(UNAME_M))
INSTALL_HDR_PATH = $(top_srcdir)/usr
LINUX_HDR_PATH = $(INSTALL_HDR_PATH)/include/
-CFLAGS += -O2 -g -I$(LINUX_HDR_PATH) -Iinclude -I$(<D)
+CFLAGS += -O2 -g -std=gnu99 -I$(LINUX_HDR_PATH) -Iinclude -I$(<D)
# After inclusion, $(OUTPUT) is defined and
# $(TEST_GEN_PROGS) starts with $(OUTPUT)/
--
1.8.3.1
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7 years
- 2
- 1
[PATCH] selftests/intel_pstate: Enhance table printing
by Daniel Díaz
Using coreutils' pr, a nicer table is printed out with the
results.
Signed-off-by: Daniel Díaz <daniel.diaz(a)linaro.org>
---
tools/testing/selftests/intel_pstate/run.sh | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/intel_pstate/run.sh b/tools/testing/selftests/intel_pstate/run.sh
index bde31a0..a40068b 100755
--- a/tools/testing/selftests/intel_pstate/run.sh
+++ b/tools/testing/selftests/intel_pstate/run.sh
@@ -92,18 +92,28 @@ done
[ $EVALUATE_ONLY -eq 0 ] && cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null
-echo "=============================================================================="
+echo "========================================================================"
echo "The marketing frequency of the cpu is $mkt_freq MHz"
echo "The maximum frequency of the cpu is $max_freq MHz"
echo "The minimum frequency of the cpu is $min_freq MHz"
# make a pretty table
-echo "Target Actual Difference MSR(0x199) max_perf_pct"
+echo "Target Actual Difference MSR(0x199) max_perf_pct" | tr " " "\n" > /tmp/result.tab
for freq in `seq $max_freq -100 $min_freq`
do
result_freq=$(cat /tmp/result.${freq} | grep "cpu MHz" | awk ' { print $4 } ' | awk -F "." ' { print $1 } ')
msr=$(cat /tmp/result.${freq} | grep "msr" | awk ' { print $3 } ')
max_perf_pct=$(cat /tmp/result.${freq} | grep "max_perf_pct" | awk ' { print $2 } ' )
- echo " $freq $result_freq $(($result_freq-$freq)) $msr $(($max_perf_pct*$max_freq))"
+ cat >> /tmp/result.tab << EOF
+$freq
+$result_freq
+$((result_freq - freq))
+$msr
+$((max_perf_pct * max_freq))
+EOF
done
+
+# print the table
+pr -aTt -5 < /tmp/result.tab
+
exit 0
--
2.7.4
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7 years
- 1
- 0
[PATCH v2] Add livepatch kselftests
by Joe Lawrence
Round two cleans up a few misc script and build items, adds a shadow
variable test, and reduces the total livepatch kselftest runtime to ~45
seconds.
The tests run on top of Petr's v11 atomic replace feature and v2 of the
shadow variable enhancement patchsets:
[PATCH 0/8] livepatch: Atomic replace feature
https://lkml.kernel.org/r/20180323120028.31451-1-pmladek@suse.com
[PATCH v2 0/2] livepatch: Allocate and free shadow variables more safely
https://lkml.kernel.org/r/20180405122315.29065-1-pmladek@suse.com
Questions for v3:
- Should we split off the atomic replace and shadow variable update
tests so that the this patchset could be merged before the ones
listed above?
- I didn't remove any of the sample modules. If anyone thinks any of
them should go, let me know. They serve as nice, simple examples so
I thought they should all stay.
- Module naming convention: to make the test script easier to grep
module names and filenames, I broke with livepatch convention and
used underscores instead of dashes. I didn't think it worth the
regex foo to flip back and forth in the test script.
- More tests from Libor and Nicolai would be welcome!
-- Maybe we separate quicktests (like these) from longer tests if
needed?
Here's a sample output from a successful test run:
% time make -C tools/testing/selftests TARGETS=livepatch run_tests
make: Entering directory `/root/linux/tools/testing/selftests'
make[1]: Entering directory `/root/linux/tools/testing/selftests/livepatch'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/root/linux/tools/testing/selftests/livepatch'
make[1]: Entering directory `/root/linux/tools/testing/selftests/livepatch'
TAP version 13
selftests: test-livepatch.sh
========================================
TEST: basic function patching ... ok
TEST: multiple livepatches ... ok
TEST: atomic replace livepatch ... ok
ok 1..1 selftests: test-livepatch.sh [PASS]
selftests: test-callbacks.sh
========================================
TEST: target module before livepatch ... ok
TEST: module_coming notifier ... ok
TEST: module_going notifier ... ok
TEST: module_coming and module_going notifiers ... ok
TEST: target module not present ... ok
TEST: pre-patch callback -ENODEV ... ok
TEST: module_coming + pre-patch callback -ENODEV ... ok
TEST: multiple target modules ... ok
TEST: busy target module ... ok
TEST: multiple livepatches ... ok
TEST: atomic replace ... ok
ok 1..2 selftests: test-callbacks.sh [PASS]
selftests: test-shadow-vars.sh
========================================
TEST: basic shadow variable API ... ok
ok 1..3 selftests: test-shadow-vars.sh [PASS]
make[1]: Leaving directory `/root/linux/tools/testing/selftests/livepatch'
make: Leaving directory `/root/linux/tools/testing/selftests'
real 0m46.166s
user 0m0.436s
sys 0m1.244s
changes from v1:
- Only add $(CC_FLAGS_FTRACE) for target modules
- Remove between test delay
- Reduce RETRY_INTERVAL to .1 sec
- Reduce test_callback_mod's busymod_work_func delay from 60 to 10 sec
- s/PASS/ok and s/FAIL/not ok for test output
- Move test descriptions from Documentation/livepatch/callbacks.txt
into tools/testing/selftests/livepatch/test-callbacks.sh
- Add a shadow variable test script and module
- Add a short tools/testing/selftests/livepatch/README
- to += linux-kselftest(a)vger.kernel.org
- cc += Libor, Nicolai, Artem
change from rfc:
- SPDX-License-Identifiers
- Moved livepatch test modules into lib/livepatch
- Renamed livepatch.sh (filename suffix)
- Reduced between-test delay time
- Split off common functions.sh file
- Split into separate livepatch, callbacks, and shadow-vars scrips
- Gave the tests short descriptions instead of TEST1, TEST2, etc.
Joe Lawrence (1):
selftests/livepatch: introduce tests
Documentation/livepatch/callbacks.txt | 487 -----------------
lib/Kconfig.debug | 12 +
lib/Makefile | 2 +
lib/livepatch/Makefile | 15 +
lib/livepatch/test_klp_atomic_replace.c | 69 +++
lib/livepatch/test_klp_callbacks_busy.c | 43 ++
lib/livepatch/test_klp_callbacks_demo.c | 132 +++++
lib/livepatch/test_klp_callbacks_demo2.c | 104 ++++
lib/livepatch/test_klp_callbacks_mod.c | 24 +
lib/livepatch/test_klp_livepatch.c | 62 +++
lib/livepatch/test_klp_shadow_vars.c | 235 ++++++++
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/livepatch/Makefile | 8 +
tools/testing/selftests/livepatch/config | 1 +
tools/testing/selftests/livepatch/functions.sh | 196 +++++++
.../testing/selftests/livepatch/test-callbacks.sh | 607 +++++++++++++++++++++
.../testing/selftests/livepatch/test-livepatch.sh | 173 ++++++
.../selftests/livepatch/test-shadow-vars.sh | 60 ++
18 files changed, 1744 insertions(+), 487 deletions(-)
create mode 100644 lib/livepatch/Makefile
create mode 100644 lib/livepatch/test_klp_atomic_replace.c
create mode 100644 lib/livepatch/test_klp_callbacks_busy.c
create mode 100644 lib/livepatch/test_klp_callbacks_demo.c
create mode 100644 lib/livepatch/test_klp_callbacks_demo2.c
create mode 100644 lib/livepatch/test_klp_callbacks_mod.c
create mode 100644 lib/livepatch/test_klp_livepatch.c
create mode 100644 lib/livepatch/test_klp_shadow_vars.c
create mode 100644 tools/testing/selftests/livepatch/Makefile
create mode 100644 tools/testing/selftests/livepatch/config
create mode 100644 tools/testing/selftests/livepatch/functions.sh
create mode 100755 tools/testing/selftests/livepatch/test-callbacks.sh
create mode 100755 tools/testing/selftests/livepatch/test-livepatch.sh
create mode 100755 tools/testing/selftests/livepatch/test-shadow-vars.sh
--
1.8.3.1
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7 years
- 4
- 7
[PATCH] selftests/filesystems: Don't run dnotify_test by default
by Michael Ellerman
In commit ce290a19609d ("selftests: add devpts selftests"), the
filesystems directory was added to the top-level selftests Makefile.
That had the effect of causing the existing dnotify_test in the
filesystems directory to now be run as part of the default selftests
test-run. Unfortunately dnotify_test is actually an infinite loop.
Fix it by moving dnotify_test to TEST_GEN_PROGS_EXTENDED, which says
that it's a generated file (ie. built) but should not be run as part
of the default test suite run (it's an "extendend" test).
While we're here cleanup a few other things, devpts_pts should be in
TEST_GEN_PROGS to indicate that it's built, and with the above two
changes we no longer need a custom all or clean rule.
Fixes: ce290a19609d ("selftests: add devpts selftests")
Signed-off-by: Michael Ellerman <mpe(a)ellerman.id.au>
---
tools/testing/selftests/filesystems/Makefile | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile
index 4e6d09fb166f..5c7d7001ad37 100644
--- a/tools/testing/selftests/filesystems/Makefile
+++ b/tools/testing/selftests/filesystems/Makefile
@@ -1,8 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
-TEST_PROGS := dnotify_test devpts_pts
-all: $(TEST_PROGS)
-include ../lib.mk
+TEST_GEN_PROGS := devpts_pts
+TEST_GEN_PROGS_EXTENDED := dnotify_test
-clean:
- rm -fr $(TEST_PROGS)
+include ../lib.mk
--
2.14.1
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7 years
- 3
- 3
[PATCH] selftests: bpf: update .gitignore with missing generated files
by Anders Roxell
Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org>
---
tools/testing/selftests/bpf/.gitignore | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore
index 9cf83f895d98..5e1ab2f0eb79 100644
--- a/tools/testing/selftests/bpf/.gitignore
+++ b/tools/testing/selftests/bpf/.gitignore
@@ -12,3 +12,6 @@ test_tcpbpf_user
test_verifier_log
feature
test_libbpf_open
+test_sock
+test_sock_addr
+urandom_read
--
2.16.3
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7 years
- 2
- 1
[PATCH][next] kvm: selftests: fix spelling mistake: "divisable" and "divisible"
by Colin King
From: Colin Ian King <colin.king(a)canonical.com>
Trivial fix to spelling mistakes in comment and message text
Signed-off-by: Colin Ian King <colin.king(a)canonical.com>
---
tools/testing/selftests/kvm/lib/kvm_util.c | 2 +-
tools/testing/selftests/kvm/lib/sparsebit.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 7ca1bb40c498..e213d513dc61 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1435,7 +1435,7 @@ vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm,
sparsebit_idx_t pg;
TEST_ASSERT((paddr_min % vm->page_size) == 0, "Min physical address "
- "not divisable by page size.\n"
+ "not divisible by page size.\n"
" paddr_min: 0x%lx page_size: 0x%x",
paddr_min, vm->page_size);
diff --git a/tools/testing/selftests/kvm/lib/sparsebit.c b/tools/testing/selftests/kvm/lib/sparsebit.c
index 0c5cf3e0cb6f..b132bc95d183 100644
--- a/tools/testing/selftests/kvm/lib/sparsebit.c
+++ b/tools/testing/selftests/kvm/lib/sparsebit.c
@@ -121,7 +121,7 @@
* avoided by moving the setting of the nodes mask bits into
* the previous nodes num_after setting.
*
- * + Node starting index is evenly divisable by the number of bits
+ * + Node starting index is evenly divisible by the number of bits
* within a nodes mask member.
*
* + Nodes never represent a range of bits that wrap around the
@@ -1741,7 +1741,7 @@ void sparsebit_validate_internal(struct sparsebit *s)
/* Validate node index is divisible by the mask size */
if (nodep->idx % MASK_BITS) {
- fprintf(stderr, "Node index not divisable by "
+ fprintf(stderr, "Node index not divisible by "
"mask size,\n"
" nodep: %p nodep->idx: 0x%lx "
"MASK_BITS: %lu\n",
--
2.15.1
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7 years, 1 month
- 2
- 1
[PATCH v2] Add udmabuf misc device
by Gerd Hoffmann
A driver to let userspace turn iovecs into dma-bufs.
Use case: Allows qemu create dmabufs for the vga framebuffer or
virtio-gpu ressources. Then they can be passed around to display
those guest things on the host. To spice client for classic full
framebuffer display, and hopefully some day to wayland server for
seamless guest window display.
Those dma-bufs are accounted against user's shm mlock bucket as the
pages are effectively locked in memory.
Cc: David Airlie <airlied(a)linux.ie>
Cc: Tomeu Vizoso <tomeu.vizoso(a)collabora.com>
Cc: Daniel Vetter <daniel(a)ffwll.ch>
Signed-off-by: Gerd Hoffmann <kraxel(a)redhat.com>
---
include/uapi/linux/udmabuf.h | 23 ++
drivers/dma-buf/udmabuf.c | 261 ++++++++++++++++++++++
tools/testing/selftests/drivers/dma-buf/udmabuf.c | 69 ++++++
drivers/dma-buf/Kconfig | 7 +
drivers/dma-buf/Makefile | 1 +
tools/testing/selftests/drivers/dma-buf/Makefile | 5 +
6 files changed, 366 insertions(+)
create mode 100644 include/uapi/linux/udmabuf.h
create mode 100644 drivers/dma-buf/udmabuf.c
create mode 100644 tools/testing/selftests/drivers/dma-buf/udmabuf.c
create mode 100644 tools/testing/selftests/drivers/dma-buf/Makefile
diff --git a/include/uapi/linux/udmabuf.h b/include/uapi/linux/udmabuf.h
new file mode 100644
index 0000000000..54ceba203a
--- /dev/null
+++ b/include/uapi/linux/udmabuf.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_LINUX_UDMABUF_H
+#define _UAPI_LINUX_UDMABUF_H
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+struct udmabuf_iovec {
+ __u64 base;
+ __u64 len;
+};
+
+#define UDMABUF_FLAGS_CLOEXEC 0x01
+
+struct udmabuf_create {
+ __u32 flags;
+ __u32 niov;
+ struct udmabuf_iovec iovs[];
+};
+
+#define UDMABUF_CREATE _IOW(0x42, 0x23, struct udmabuf_create)
+
+#endif /* _UAPI_LINUX_UDMABUF_H */
diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
new file mode 100644
index 0000000000..664ab4ee4e
--- /dev/null
+++ b/drivers/dma-buf/udmabuf.c
@@ -0,0 +1,261 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/miscdevice.h>
+#include <linux/dma-buf.h>
+#include <linux/highmem.h>
+#include <linux/cred.h>
+
+#include <uapi/linux/udmabuf.h>
+
+struct udmabuf {
+ u32 pagecount;
+ struct page **pages;
+ struct user_struct *owner;
+};
+
+static int udmabuf_vm_fault(struct vm_fault *vmf)
+{
+ struct vm_area_struct *vma = vmf->vma;
+ struct udmabuf *ubuf = vma->vm_private_data;
+
+ if (WARN_ON(vmf->pgoff >= ubuf->pagecount))
+ return VM_FAULT_SIGBUS;
+
+ vmf->page = ubuf->pages[vmf->pgoff];
+ get_page(vmf->page);
+ return 0;
+}
+
+static const struct vm_operations_struct udmabuf_vm_ops = {
+ .fault = udmabuf_vm_fault,
+};
+
+static int mmap_udmabuf(struct dma_buf *buf, struct vm_area_struct *vma)
+{
+ struct udmabuf *ubuf = buf->priv;
+
+ if ((vma->vm_flags & VM_SHARED) == 0)
+ return -EINVAL;
+
+ vma->vm_ops = &udmabuf_vm_ops;
+ vma->vm_private_data = ubuf;
+ return 0;
+}
+
+static struct sg_table *map_udmabuf(struct dma_buf_attachment *at,
+ enum dma_data_direction direction)
+{
+ struct udmabuf *ubuf = at->dmabuf->priv;
+ struct sg_table *sg;
+
+ sg = kzalloc(sizeof(*sg), GFP_KERNEL);
+ if (!sg)
+ goto err1;
+ if (sg_alloc_table_from_pages(sg, ubuf->pages, ubuf->pagecount,
+ 0, ubuf->pagecount << PAGE_SHIFT,
+ GFP_KERNEL) < 0)
+ goto err2;
+ if (!dma_map_sg(at->dev, sg->sgl, sg->nents, direction))
+ goto err3;
+
+ return sg;
+
+err3:
+ sg_free_table(sg);
+err2:
+ kfree(sg);
+err1:
+ return ERR_PTR(-ENOMEM);
+}
+
+static void unmap_udmabuf(struct dma_buf_attachment *at,
+ struct sg_table *sg,
+ enum dma_data_direction direction)
+{
+ sg_free_table(sg);
+ kfree(sg);
+}
+
+static void release_udmabuf(struct dma_buf *buf)
+{
+ struct udmabuf *ubuf = buf->priv;
+ pgoff_t pg;
+
+ for (pg = 0; pg < ubuf->pagecount; pg++)
+ put_page(ubuf->pages[pg]);
+ user_shm_unlock(ubuf->pagecount << PAGE_SHIFT, ubuf->owner);
+ free_uid(ubuf->owner);
+ kfree(ubuf->pages);
+ kfree(ubuf);
+}
+
+static void *kmap_atomic_udmabuf(struct dma_buf *buf, unsigned long page_num)
+{
+ struct udmabuf *ubuf = buf->priv;
+ struct page *page = ubuf->pages[page_num];
+
+ return kmap_atomic(page);
+}
+
+static void *kmap_udmabuf(struct dma_buf *buf, unsigned long page_num)
+{
+ struct udmabuf *ubuf = buf->priv;
+ struct page *page = ubuf->pages[page_num];
+
+ return kmap(page);
+}
+
+static struct dma_buf_ops udmabuf_ops = {
+ .map_dma_buf = map_udmabuf,
+ .unmap_dma_buf = unmap_udmabuf,
+ .release = release_udmabuf,
+ .map_atomic = kmap_atomic_udmabuf,
+ .map = kmap_udmabuf,
+ .mmap = mmap_udmabuf,
+};
+
+static long udmabuf_ioctl_create(struct file *filp, unsigned long arg)
+{
+ struct udmabuf_create create;
+ struct udmabuf_iovec *iovs;
+ struct udmabuf *ubuf;
+ DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
+ struct dma_buf *buf;
+ pgoff_t pgoff, pgcnt;
+ u32 iov, flags;
+ int ret;
+
+ if (copy_from_user(&create, (void __user *)arg,
+ sizeof(struct udmabuf_create)))
+ return -EFAULT;
+
+ iovs = kmalloc_array(create.niov, sizeof(struct udmabuf_iovec),
+ GFP_KERNEL);
+ if (!iovs)
+ return -ENOMEM;
+
+ arg += offsetof(struct udmabuf_create, iovs);
+ ret = -EFAULT;
+ if (copy_from_user(iovs, (void __user *)arg,
+ create.niov * sizeof(struct udmabuf_iovec)))
+ goto err_free_iovs;
+
+ ubuf = kzalloc(sizeof(struct udmabuf), GFP_KERNEL);
+ if (!ubuf)
+ goto err_free_iovs;
+
+ ret = -EINVAL;
+ for (iov = 0; iov < create.niov; iov++) {
+ if (!IS_ALIGNED(iovs[iov].base, PAGE_SIZE))
+ goto err_free_buf;
+ if (!IS_ALIGNED(iovs[iov].len, PAGE_SIZE))
+ goto err_free_buf;
+ ubuf->pagecount += iovs[iov].len >> PAGE_SHIFT;
+ }
+
+ /* this effectively mlocks the pages so account it accordingly */
+ ret = -ENOMEM;
+ ubuf->owner = current_user();
+ if (!user_shm_lock(ubuf->pagecount << PAGE_SHIFT, ubuf->owner))
+ goto err_free_buf;
+
+ ubuf->pages = kmalloc_array(ubuf->pagecount, sizeof(struct page*),
+ GFP_KERNEL);
+ if (!ubuf->pages)
+ goto err_shm_unlock;
+
+ pgoff = 0;
+ for (iov = 0; iov < create.niov; iov++) {
+ pgcnt = iovs[iov].len >> PAGE_SHIFT;
+ while (pgcnt > 0) {
+ ret = get_user_pages_fast(iovs[iov].base, pgcnt,
+ true, /* write */
+ ubuf->pages + pgoff);
+ if (ret < 0)
+ goto err_put_pages;
+ pgoff += ret;
+ pgcnt -= ret;
+ }
+ }
+
+ exp_info.ops = &udmabuf_ops;
+ exp_info.size = ubuf->pagecount << PAGE_SHIFT;
+ exp_info.priv = ubuf;
+
+ buf = dma_buf_export(&exp_info);
+ if (IS_ERR(buf)) {
+ ret = PTR_ERR(buf);
+ goto err_put_pages;
+ }
+
+ flags = 0;
+ if (create.flags & UDMABUF_FLAGS_CLOEXEC)
+ flags |= O_CLOEXEC;
+
+ kfree(iovs);
+ return dma_buf_fd(buf, flags);
+
+err_put_pages:
+ while (pgoff > 0)
+ put_page(ubuf->pages[--pgoff]);
+err_shm_unlock:
+ user_shm_unlock(ubuf->pagecount << PAGE_SHIFT, ubuf->owner);
+err_free_buf:
+ free_uid(ubuf->owner);
+ kfree(ubuf->pages);
+ kfree(ubuf);
+err_free_iovs:
+ kfree(iovs);
+ return ret;
+}
+
+static long udmabuf_ioctl(struct file *filp, unsigned int ioctl,
+ unsigned long arg)
+{
+ long ret;
+
+ switch (ioctl) {
+ case UDMABUF_CREATE:
+ ret = udmabuf_ioctl_create(filp, arg);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+
+static const struct file_operations udmabuf_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = udmabuf_ioctl,
+};
+
+static struct miscdevice udmabuf_misc = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "udmabuf",
+ .fops = &udmabuf_fops,
+};
+
+static int __init udmabuf_dev_init(void)
+{
+ return misc_register(&udmabuf_misc);
+}
+
+static void __exit udmabuf_dev_exit(void)
+{
+ misc_deregister(&udmabuf_misc);
+}
+
+module_init(udmabuf_dev_init)
+module_exit(udmabuf_dev_exit)
+
+MODULE_AUTHOR("Gerd Hoffmann <kraxel(a)redhat.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/tools/testing/selftests/drivers/dma-buf/udmabuf.c b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
new file mode 100644
index 0000000000..3472c8ee49
--- /dev/null
+++ b/tools/testing/selftests/drivers/dma-buf/udmabuf.c
@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <malloc.h>
+
+#include <sys/ioctl.h>
+#include <linux/udmabuf.h>
+
+#define TEST_PREFIX "drivers/dma-buf/udmabuf"
+#define NUM_PAGES 4
+
+int main(int argc, char *argv[])
+{
+ struct udmabuf_create *create;
+ void *mem;
+ int dev, fd;
+
+ dev = open("/dev/udmabuf", O_RDWR);
+ if (dev < 0) {
+ printf("%s: [skip]\n", TEST_PREFIX);
+ exit(77);
+ }
+
+ mem = memalign(getpagesize(), getpagesize() * NUM_PAGES);
+ if (mem == NULL) {
+ printf("%s: [FAIL]\n", TEST_PREFIX);
+ exit (1);
+ }
+
+ create = malloc(sizeof(struct udmabuf_create) +
+ sizeof(struct udmabuf_iovec));
+ create->flags = 0;
+ create->niov = 1;
+
+ /* should fail (base not page aligned) */
+ create->iovs[0].base = (intptr_t)mem + getpagesize()/2;
+ create->iovs[0].len = getpagesize();
+ fd = ioctl(dev, UDMABUF_CREATE, create);
+ if (fd >= 0) {
+ printf("%s: [FAIL]\n", TEST_PREFIX);
+ exit(1);
+ }
+
+ /* should fail (size not multiple of page) */
+ create->iovs[0].base = (intptr_t)mem;
+ create->iovs[0].len = getpagesize()/2;
+ fd = ioctl(dev, UDMABUF_CREATE, create);
+ if (fd >= 0) {
+ printf("%s: [FAIL]\n", TEST_PREFIX);
+ exit(1);
+ }
+
+ /* should work */
+ create->iovs[0].base = (intptr_t)mem;
+ create->iovs[0].len = getpagesize() * NUM_PAGES;
+ fd = ioctl(dev, UDMABUF_CREATE, create);
+ if (fd < 0) {
+ printf("%s: [FAIL]\n", TEST_PREFIX);
+ exit(1);
+ }
+ close(fd);
+
+ fprintf(stderr, "%s: ok\n", TEST_PREFIX);
+ close(dev);
+ return 0;
+}
diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig
index ed3b785bae..19be3ec62d 100644
--- a/drivers/dma-buf/Kconfig
+++ b/drivers/dma-buf/Kconfig
@@ -30,4 +30,11 @@ config SW_SYNC
WARNING: improper use of this can result in deadlocking kernel
drivers from userspace. Intended for test and debug only.
+config UDMABUF
+ bool "userspace dmabuf misc driver"
+ default n
+ depends on DMA_SHARED_BUFFER
+ ---help---
+ A driver to let userspace turn iovs into dma-bufs.
+
endmenu
diff --git a/drivers/dma-buf/Makefile b/drivers/dma-buf/Makefile
index c33bf88631..0913a6ccab 100644
--- a/drivers/dma-buf/Makefile
+++ b/drivers/dma-buf/Makefile
@@ -1,3 +1,4 @@
obj-y := dma-buf.o dma-fence.o dma-fence-array.o reservation.o seqno-fence.o
obj-$(CONFIG_SYNC_FILE) += sync_file.o
obj-$(CONFIG_SW_SYNC) += sw_sync.o sync_debug.o
+obj-$(CONFIG_UDMABUF) += udmabuf.o
diff --git a/tools/testing/selftests/drivers/dma-buf/Makefile b/tools/testing/selftests/drivers/dma-buf/Makefile
new file mode 100644
index 0000000000..4154c3d7aa
--- /dev/null
+++ b/tools/testing/selftests/drivers/dma-buf/Makefile
@@ -0,0 +1,5 @@
+CFLAGS += -I../../../../../usr/include/
+
+TEST_GEN_PROGS := udmabuf
+
+include ../../lib.mk
--
2.9.3
--
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7 years, 1 month
- 5
- 6
[PATCH] selftests/android/ion: fix heap_type may be uninitialized
by Anders Roxell
gcc warns that 'heap_type' is not initialized if we don't come through
any of the two 'case' statesments before:
ionapp_export.c:91:2: warning: ‘heap_type’ may be used uninitialized in
this function [-Wmaybe-uninitialized]
printf("heap_type: %ld, heap_size: %ld\n", heap_type, heap_size);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In the current code, we initialize the heap_type to -1 before the 'case'
statements. We also change the print_usage function to state that
heap_type and heap_size isn't optional, they are mandatory.
Fixes: 47a18c42d992 ("android/ion: userspace test utility for ion buffer sharing")
Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org>
---
.../testing/selftests/android/ion/ionapp_export.c | 23 +++++++++++++++++++---
1 file changed, 20 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/android/ion/ionapp_export.c b/tools/testing/selftests/android/ion/ionapp_export.c
index a944e72621a9..b42f803e9d2a 100644
--- a/tools/testing/selftests/android/ion/ionapp_export.c
+++ b/tools/testing/selftests/android/ion/ionapp_export.c
@@ -31,16 +31,24 @@
void print_usage(int argc, char *argv[])
{
- printf("Usage: %s [-h <help>] [-i <heap id>] [-s <size in bytes>]\n",
+ printf("Usage: %s [-h <help>] -i <heap id> -s <size in bytes>\n",
argv[0]);
}
+void heap_type_error_text(void)
+{
+ printf("heap_type must be specified\n");
+ printf(" need to specify -i <heap_type>\n");
+ printf(" supported heap types 0 or 1\n");
+}
+
int main(int argc, char *argv[])
{
int opt, ret, status, heapid;
int sockfd, client_fd, shared_fd;
unsigned char *map_buf;
- unsigned long map_len, heap_type, heap_size, flags;
+ unsigned long map_len, heap_size, flags;
+ long heap_type;
struct ion_buffer_info info;
struct socket_info skinfo;
@@ -50,6 +58,7 @@ int main(int argc, char *argv[])
}
heap_size = 0;
+ heap_type = -1;
flags = 0;
while ((opt = getopt(argc, argv, "hi:s:")) != -1) {
@@ -68,7 +77,8 @@ int main(int argc, char *argv[])
heap_type = ION_HEAP_TYPE_SYSTEM_CONTIG;
break;
default:
- printf("ERROR: heap type not supported\n");
+ heap_type_error_text();
+ print_usage(argc, argv);
exit(1);
}
break;
@@ -82,8 +92,15 @@ int main(int argc, char *argv[])
}
}
+ if (heap_type < 0) {
+ heap_type_error_text();
+ print_usage(argc, argv);
+ exit(1);
+ }
+
if (heap_size <= 0) {
printf("heap_size cannot be 0\n");
+ printf(" need to specify -s <heap_size>\n");
print_usage(argc, argv);
exit(1);
}
--
2.11.0
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7 years, 1 month
- 3
- 4
[GIT PULL] kselftest update for 4.17-rc1
by Shuah Khan
Hi Linus,
Please pull the following Kselftest update for 4.17-rc1
This Kselftest update for 4.17-rc1 consists of:
- Test build error fixes.
- Fixes to prevent intel_pstate from building on non-x86 systems.
- New test for ion with vgem driver.
- Change to print the test name to /dev/kmsg to add context to kernel
failures if any uncovered from running the test.
- Kselftest framework enhancements to add KSFT_TAP_LEVEL environment
variable to prevent nested TAP headers being printed in the Kselftest
output. Nested TAP13 headers could cause problems for some parsers.
This change suppresses the nested headers from test programs and test
shell scripts with changes to framework and Makefiles without changing
the tests.
Diff for the update is attached.
thanks,
-- Shuah
-----------------------------------------------------------------------------------
The following changes since commit 661e50bc853209e41a5c14a290ca4decc43cbfd1:
Linux 4.16-rc4 (2018-03-04 14:54:11 -0800)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux-kselftest-4.17-rc1
for you to fetch changes up to 6aa69043d9f3f4adc5b3817ccfcac1fddfe10ded:
selftests/intel_pstate: Fix build rule for x86 (2018-04-02 11:55:47 -0600)
----------------------------------------------------------------
linux-kselftest-4.17-rc1
This Kselftest update for 4.17-rc1 consists of:
- Test build error fixes.
- Fixes to prevent intel_pstate from building on non-x86 systems.
- New test for ion with vgem driver.
- Change to print the test name to /dev/kmsg to add context to kernel
failures if any uncovered from running the test.
- Kselftest framework enhancements to add KSFT_TAP_LEVEL environment
variable to prevent nested TAP headers being printed in the Kselftest
output. Nested TAP13 headers could cause problems for some parsers.
This change suppresses the nested headers from test programs and test
shell scripts with changes to framework and Makefiles without changing
the tests.
----------------------------------------------------------------
Anders Roxell (1):
selftests/android/ion: Makefile: fix build error
Daniel Díaz (1):
selftests/intel_pstate: Fix build rule for x86
Kees Cook (1):
selftests/seccomp: Allow get_metadata to XFAIL
Laura Abbott (2):
selftests: ion: Remove some prints
selftests: ion: Add simple test with the vgem driver
Michael Ellerman (1):
selftests: Print the test we're running to /dev/kmsg
Shuah Khan (4):
selftests: kselftest framework: add handling for TAP header level
selftests: lib.mk set KSFT_TAP_LEVEL to prevent nested TAP headers
selftests: Makefile set KSFT_TAP_LEVEL to prevent nested TAP headers
selftests: futex Makefile add top level TAP header echo to RUN_TESTS
tools/testing/selftests/Makefile | 11 +-
tools/testing/selftests/android/ion/.gitignore | 1 +
tools/testing/selftests/android/ion/Makefile | 5 +-
tools/testing/selftests/android/ion/config | 1 +
tools/testing/selftests/android/ion/ionmap_test.c | 136 ++++++++++++++++++++++
tools/testing/selftests/android/ion/ionutils.c | 6 -
tools/testing/selftests/futex/Makefile | 4 +
tools/testing/selftests/intel_pstate/Makefile | 5 +-
tools/testing/selftests/kselftest.h | 3 +-
tools/testing/selftests/kselftest_harness.h | 26 ++++-
tools/testing/selftests/lib.mk | 1 +
tools/testing/selftests/seccomp/seccomp_bpf.c | 15 ++-
12 files changed, 200 insertions(+), 14 deletions(-)
create mode 100644 tools/testing/selftests/android/ion/ionmap_test.c
-----------------------------------------------------------------------------------
7 years, 1 month
- 1
- 0
[PATCH 1/2] selftests/memfd/memfd_test.c: fix implicit declaration
by Anders Roxell
gcc warns about implicit declaration.
gcc -D_FILE_OFFSET_BITS=64 -I../../../../include/uapi/
-I../../../../include/ -I../../../../usr/include/
memfd_test.c common.o -o memfd_test
memfd_test.c: In function ‘mfd_assert_get_seals’:
memfd_test.c:74:6: warning: implicit declaration of function ‘fcntl’
[-Wimplicit-function-declaration]
r = fcntl(fd, F_GET_SEALS);
^~~~~
memfd_test.c: In function ‘mfd_assert_open’:
memfd_test.c:197:6: warning: implicit declaration of function ‘open’
[-Wimplicit-function-declaration]
r = open(buf, flags, mode);
^~~~
memfd_test.c: In function ‘mfd_assert_write’:
memfd_test.c:328:6: warning: implicit declaration of function ‘fallocate’
[-Wimplicit-function-declaration]
r = fallocate(fd,
^~~~~~~~~
In the current code, we include the headers that the functions want
according to the man pages, and we add some defines that will be used if
they isn't found in glibc. The defines was added into the kernel source
in kernel >= 3.16 and glibc requires kernel header files >= 3.2.
Fixes: 4f5ce5e8d7e2 ("selftests: add memfd_create() + sealing tests")
Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org>
---
tools/testing/selftests/memfd/memfd_test.c | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
index 10baa1652fc2..0dbeb29c094c 100644
--- a/tools/testing/selftests/memfd/memfd_test.c
+++ b/tools/testing/selftests/memfd/memfd_test.c
@@ -6,7 +6,6 @@
#include <inttypes.h>
#include <limits.h>
#include <linux/falloc.h>
-#include <linux/fcntl.h>
#include <linux/memfd.h>
#include <sched.h>
#include <stdio.h>
@@ -14,13 +13,37 @@
#include <signal.h>
#include <string.h>
#include <sys/mman.h>
+#include <sys/types.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/wait.h>
+#include <fcntl.h>
#include <unistd.h>
#include "common.h"
+#ifndef F_LINUX_SPECIFIC_BASE
+# define F_LINUX_SPECIFIC_BASE 1024
+#endif
+#ifndef F_ADD_SEALS
+# define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
+#endif
+#ifndef F_GET_SEALS
+# define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
+#endif
+#ifndef F_SEAL_SEAL
+# define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
+#endif
+#ifndef F_SEAL_SHRINK
+# define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
+#endif
+#ifndef F_SEAL_GROW
+# define F_SEAL_GROW 0x0004 /* prevent file from growing */
+#endif
+#ifndef F_SEAL_WRITE
+# define F_SEAL_WRITE 0x0008 /* prevent writes */
+#endif
+
#define MEMFD_STR "memfd:"
#define MEMFD_HUGE_STR "memfd-hugetlb:"
#define SHARED_FT_STR "(shared file-table)"
--
2.11.0
--
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7 years, 1 month
- 3
- 5