- Linux-kselftest-mirror - lists.linaro.org

[PATCH v2 0/2] Skip mm selftests instead when kernel features are not present

by Zi Yan

Two guard_regions tests on userfaultfd fail when userfaultfd is not present. Skip them instead. hugevm test reads kernel config to get page table level information and fails when neither /proc/config.gz nor /boot/config-* is present. Skip it instead. Zi Yan (2): selftests/mm: skip guard_regions.uffd tests when uffd is not present. selftests/mm: skip hugevm test if kernel config file is not present. tools/testing/selftests/mm/guard-regions.c | 17 ++++++++++-- .../selftests/mm/va_high_addr_switch.sh | 26 +++++++------------ 2 files changed, 24 insertions(+), 19 deletions(-) -- 2.47.2

5 months, 2 weeks

1
2
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[RFC PATCH v2 0/3] KVM: arm64: Don't claim MTE_ASYNC if not supported

by Ben Horgan

The ID_AA64PFR1_EL1.MTE_frac field is currently hidden from KVM. However, when ID_AA64PFR1_EL1.MTE==2, ID_AA64PFR1_EL1.MTE_frac==0 indicates that MTE_ASYNC is supported. On a host with ID_AA64PFR1_EL1.MTE==2 but without MTE_ASYNC support a guest with the MTE capability enabled will incorrectly see MTE_ASYNC advertised as supported. This series fixes that. This was found by inspection and the current behaviour is not known to break anything. Linux doesn't check MTE_frac, and wrongly, assumes MTE async faults can be generated whenever MTE is supported. This is a separate problem and not addressed here. I am looking for feedback on whether this change is valuable or otherwise. Changes since v1: Only pass MTE_Frac hw value to the guest when it is the exact failure case. Changed base commit to v6.15-rc5 but still applies on v6.16-rc2 as well. Ben Horgan (3): arm64/sysreg: Expose MTE_frac so that it is visible to KVM KVM: arm64: Make MTE_frac masking conditional on MTE capability KVM: selftests: Confirm exposing MTE_frac does not break migration arch/arm64/kernel/cpufeature.c | 1 + arch/arm64/kvm/sys_regs.c | 28 ++++++- .../testing/selftests/kvm/arm64/set_id_regs.c | 77 ++++++++++++++++++- 3 files changed, 103 insertions(+), 3 deletions(-) base-commit: 92a09c47464d040866cf2b4cd052bc60555185fb -- 2.43.0

5 months, 2 weeks

2
4
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[PATCH] selftests: Improve test output grammar, code style

by Hanne-Lotta Mäenpää

Add small grammar fixes in perf events and Real Time Clock tests' output messages. Include braces around a single if statement, when there are multiple statements in the else branch, to align with the kernel coding style. Signed-off-by: Hanne-Lotta Mäenpää <hannelotta(a)gmail.com> --- tools/testing/selftests/perf_events/watermark_signal.c | 7 ++++--- tools/testing/selftests/rtc/rtctest.c | 10 +++++----- 2 files changed, 9 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/perf_events/watermark_signal.c b/tools/testing/selftests/perf_events/watermark_signal.c index 49dc1e831174..6176afd4950b 100644 --- a/tools/testing/selftests/perf_events/watermark_signal.c +++ b/tools/testing/selftests/perf_events/watermark_signal.c @@ -65,8 +65,9 @@ TEST(watermark_signal) child = fork(); EXPECT_GE(child, 0); - if (child == 0) + if (child == 0) { do_child(); + } else if (child < 0) { perror("fork()"); goto cleanup; @@ -75,7 +76,7 @@ TEST(watermark_signal) if (waitpid(child, &child_status, WSTOPPED) != child || !(WIFSTOPPED(child_status) && WSTOPSIG(child_status) == SIGSTOP)) { fprintf(stderr, - "failed to sycnhronize with child errno=%d status=%x\n", + "failed to synchronize with child errno=%d status=%x\n", errno, child_status); goto cleanup; @@ -84,7 +85,7 @@ TEST(watermark_signal) fd = syscall(__NR_perf_event_open, &attr, child, -1, -1, PERF_FLAG_FD_CLOEXEC); if (fd < 0) { - fprintf(stderr, "failed opening event %llx\n", attr.config); + fprintf(stderr, "failed to setup performance monitoring %llx\n", attr.config); goto cleanup; } diff --git a/tools/testing/selftests/rtc/rtctest.c b/tools/testing/selftests/rtc/rtctest.c index be175c0e6ae3..8fd4d5d3b527 100644 --- a/tools/testing/selftests/rtc/rtctest.c +++ b/tools/testing/selftests/rtc/rtctest.c @@ -138,10 +138,10 @@ TEST_F_TIMEOUT(rtc, date_read_loop, READ_LOOP_DURATION_SEC + 2) { rtc_read = rtc_time_to_timestamp(&rtc_tm); /* Time should not go backwards */ ASSERT_LE(prev_rtc_read, rtc_read); - /* Time should not increase more then 1s at a time */ + /* Time should not increase more than 1s per read */ ASSERT_GE(prev_rtc_read + 1, rtc_read); - /* Sleep 11ms to avoid killing / overheating the RTC */ + /* Sleep 11ms to avoid overheating the RTC */ nanosleep_with_retries(READ_LOOP_SLEEP_MS * 1000000); prev_rtc_read = rtc_read; @@ -236,7 +236,7 @@ TEST_F(rtc, alarm_alm_set) { if (alarm_state == RTC_ALARM_DISABLED) SKIP(return, "Skipping test since alarms are not supported."); if (alarm_state == RTC_ALARM_RES_MINUTE) - SKIP(return, "Skipping test since alarms has only minute granularity."); + SKIP(return, "Skipping test since alarms have only minute granularity."); rc = ioctl(self->fd, RTC_RD_TIME, &tm); ASSERT_NE(-1, rc); @@ -306,7 +306,7 @@ TEST_F(rtc, alarm_wkalm_set) { if (alarm_state == RTC_ALARM_DISABLED) SKIP(return, "Skipping test since alarms are not supported."); if (alarm_state == RTC_ALARM_RES_MINUTE) - SKIP(return, "Skipping test since alarms has only minute granularity."); + SKIP(return, "Skipping test since alarms have only minute granularity."); rc = ioctl(self->fd, RTC_RD_TIME, &alarm.time); ASSERT_NE(-1, rc); @@ -502,7 +502,7 @@ int main(int argc, char **argv) if (access(rtc_file, R_OK) == 0) ret = test_harness_run(argc, argv); else - ksft_exit_skip("[SKIP]: Cannot access rtc file %s - Exiting\n", + ksft_exit_skip("Cannot access RTC file %s - exiting\n", rtc_file); return ret; -- 2.39.5

5 months, 2 weeks

2
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[PATCH 1/2] selftests/mm: skip uffd tests in madv_guard if uffd is not present.

by Zi Yan

When userfaultfd is not compiled into kernel, userfaultfd() returns -1, causing uffd tests in madv_guard fail. Skip the tests instead. Signed-off-by: Zi Yan <ziy(a)nvidia.com> --- tools/testing/selftests/mm/guard-regions.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/mm/guard-regions.c b/tools/testing/selftests/mm/guard-regions.c index 0cd9d236649d..93af3d3760f9 100644 --- a/tools/testing/selftests/mm/guard-regions.c +++ b/tools/testing/selftests/mm/guard-regions.c @@ -1453,8 +1453,21 @@ TEST_F(guard_regions, uffd) /* Set up uffd. */ uffd = userfaultfd(0); - if (uffd == -1 && errno == EPERM) - ksft_exit_skip("No userfaultfd permissions, try running as root.\n"); + if (uffd == -1) { + switch (errno) { + case EPERM: + SKIP(return, "No userfaultfd permissions, try running as root."); + break; + case ENOSYS: + SKIP(return, "userfaultfd is not supported/not enabled."); + break; + default: + ksft_exit_fail_msg("userfaultfd failed with %s\n", + strerror(errno)); + break; + } + } + ASSERT_NE(uffd, -1); ASSERT_EQ(ioctl(uffd, UFFDIO_API, &api), 0); -- 2.47.2

5 months, 2 weeks

3
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[PATCH net-next v5] selftests/vsock: add initial vmtest.sh for vsock

by Bobby Eshleman

This commit introduces a new vmtest.sh runner for vsock. It uses virtme-ng/qemu to run tests in a VM. The tests validate G2H, H2G, and loopback. The testing tools from tools/testing/vsock/ are reused. Currently, only vsock_test is used. VMCI and hyperv support is automatically built, though not used. Only tested on x86. To run: $ tools/testing/selftests/vsock/vmtest.sh or $ make -C tools/testing/selftests TARGETS=vsock run_tests Example runs: $ ./tools/testing/selftests/vsock/vmtest.sh TAP version 13 1..3 not ok 0 vm_server_host_client # exit=1 ok 1 vm_client_host_server ok 2 vm_loopback 1..3 $ ./tools/testing/selftests/vsock/vmtest.sh vm_loopback TAP version 13 1..1 ok 0 vm_loopback 1..1 Future work can include vsock_diag_test. The tap output style copies mm's run_vmtests.sh. Because vsock requires a VM to test anything other than loopback, this patch adds vmtest.sh as a kselftest itself. This is different than other systems that have a "vmtest.sh", where it is used as a utility script to spin up a VM to run the selftests as a guest (but isn't hooked into kselftest). Testing in NIPA is still WIP. Signed-off-by: Bobby Eshleman <bobbyeshleman(a)gmail.com> --- Changes in v5: - make log file a tmpfile (Paolo) - make sure both default and user defined QEMU gets handled by the dependency check (Paolo) - increased VM boot up timeout from 1m to 3m for slow hosts (Paolo) - rename vm_setup -> vm_start (Paolo) - derive wait_for_listener from selftests/net/net_helper.sh to removes ss usage - Remove unused 'unset IFS' line (Paolo) - leave space after variable declarations (Paolo) - make QEMU_PIDFILE a tmp file (Paolo) - make everything readonly that is only read (Paolo) - source ktap_helpers.sh for KSFT_PASS and friends (Paolo) - don't check for timeout util (Paolo) - add missing usage string for -q qemu arg - add tap prefix to SUMMARY line since it isn't part of TAP protocol - exit with the correct status code based on failure/pass counts - Link to v4: https://lore.kernel.org/r/20250507-vsock-vmtest-v4-1-6e2a97262cd6@gmail.com Changes in v4: - do not use special tab delimiter for help string parsing (Stefano + Paolo) - fix paths for when installing kselftest and running out-of-tree (Paolo) - change vng to using running kernel instead of compiled kernel (Paolo) - use multi-line string for QEMU_OPTS (Stefano) - change timeout to 300s (Paolo) - skip if tools are not found and use kselftests status codes (Paolo) - remove build from vmtest.sh (Paolo) - change 2222 -> SSH_HOST_PORT (Stefano) - add tap-format output - add vmtest.log to gitignore - check for vsock_test binary and remind user to build it if missing - create a proper build in makefile - style fixes - add ssh, timeout, and pkill to dependency check, just in case - fix numerical comparison in conditionals - check qemu pidfile exists before proceeding (avoid wasting time waiting for ssh) - fix tracking of pass/fail bug - fix stderr redirection bug - Link to v3: https://lore.kernel.org/r/20250428-vsock-vmtest-v3-1-181af6163f3e@gmail.com Changes in v3: - use common conditional syntax for checking variables - use return value instead of global rc - fix typo TEST_HOST_LISTENER_PORT -> TEST_HOST_PORT_LISTENER - use SIGTERM instead of SIGKILL on cleanup - use peer-cid=1 for loopback - change sleep delay times into globals - fix test_vm_loopback logging - add test selection in arguments - make QEMU an argument - check that vng binary is on path - use QEMU variable - change <tab><backslash> to <space><backslash> - fix hardcoded file paths - add comment in commit msg about script that vmtest.sh was based off of - Add tools/testing/selftest/vsock/Makefile for kselftest - Link to v2: https://lore.kernel.org/r/20250417-vsock-vmtest-v2-1-3901a27331e8@gmail.com Changes in v2: - add kernel oops and warnings checker - change testname variable to use FUNCNAME - fix spacing in test_vm_server_host_client - add -s skip build option to vmtest.sh - add test_vm_loopback - pass port to vm_wait_for_listener - fix indentation in vmtest.sh - add vmci and hyperv to config - changed whitespace from tabs to spaces in help string - Link to v1: https://lore.kernel.org/r/20250410-vsock-vmtest-v1-1-f35a81dab98c@gmail.com --- MAINTAINERS | 1 + tools/testing/selftests/vsock/.gitignore | 2 + tools/testing/selftests/vsock/Makefile | 16 ++ tools/testing/selftests/vsock/config | 114 ++++++++ tools/testing/selftests/vsock/settings | 1 + tools/testing/selftests/vsock/vmtest.sh | 441 +++++++++++++++++++++++++++++++ 6 files changed, 575 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 657a67f9031ef7798c19ac63e6383d4cb18a9e1f..3fbdd7bbfce7196a3cc7db70203317c6bd0e51fd 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -25751,6 +25751,7 @@ F: include/uapi/linux/vm_sockets.h F: include/uapi/linux/vm_sockets_diag.h F: include/uapi/linux/vsockmon.h F: net/vmw_vsock/ +F: tools/testing/selftests/vsock/ F: tools/testing/vsock/ VMALLOC diff --git a/tools/testing/selftests/vsock/.gitignore b/tools/testing/selftests/vsock/.gitignore new file mode 100644 index 0000000000000000000000000000000000000000..9c5bf379480f829a14713d5f5dc7d525bc272e84 --- /dev/null +++ b/tools/testing/selftests/vsock/.gitignore @@ -0,0 +1,2 @@ +vmtest.log +vsock_test diff --git a/tools/testing/selftests/vsock/Makefile b/tools/testing/selftests/vsock/Makefile new file mode 100644 index 0000000000000000000000000000000000000000..7ab4970e5e8a019be33f96a36f95c00573d7bfcf --- /dev/null +++ b/tools/testing/selftests/vsock/Makefile @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0 + +CURDIR := $(abspath .) +TOOLSDIR := $(abspath ../../..) + +$(OUTPUT)/vsock_test: $(TOOLSDIR)/testing/vsock/vsock_test + install -m 755 $< $@ + +$(TOOLSDIR)/testing/vsock/vsock_test: + $(MAKE) -C $(TOOLSDIR)/testing/vsock vsock_test + +TEST_PROGS += vmtest.sh +TEST_GEN_FILES := vsock_test + +include ../lib.mk + diff --git a/tools/testing/selftests/vsock/config b/tools/testing/selftests/vsock/config new file mode 100644 index 0000000000000000000000000000000000000000..3bffaaf98fff92dc0e3bc1286afa3d8d5d52f4c7 --- /dev/null +++ b/tools/testing/selftests/vsock/config @@ -0,0 +1,114 @@ +CONFIG_BLK_DEV_INITRD=y +CONFIG_BPF=y +CONFIG_BPF_SYSCALL=y +CONFIG_BPF_JIT=y +CONFIG_HAVE_EBPF_JIT=y +CONFIG_BPF_EVENTS=y +CONFIG_FTRACE_SYSCALLS=y +CONFIG_FUNCTION_TRACER=y +CONFIG_HAVE_DYNAMIC_FTRACE=y +CONFIG_DYNAMIC_FTRACE=y +CONFIG_HAVE_KPROBES=y +CONFIG_KPROBES=y +CONFIG_KPROBE_EVENTS=y +CONFIG_ARCH_SUPPORTS_UPROBES=y +CONFIG_UPROBES=y +CONFIG_UPROBE_EVENTS=y +CONFIG_DEBUG_FS=y +CONFIG_FW_CFG_SYSFS=y +CONFIG_FW_CFG_SYSFS_CMDLINE=y +CONFIG_DRM=y +CONFIG_DRM_VIRTIO_GPU=y +CONFIG_DRM_VIRTIO_GPU_KMS=y +CONFIG_DRM_BOCHS=y +CONFIG_VIRTIO_IOMMU=y +CONFIG_SOUND=y +CONFIG_SND=y +CONFIG_SND_SEQUENCER=y +CONFIG_SND_PCI=y +CONFIG_SND_INTEL8X0=y +CONFIG_SND_HDA_CODEC_REALTEK=y +CONFIG_SECURITYFS=y +CONFIG_CGROUP_BPF=y +CONFIG_SQUASHFS=y +CONFIG_SQUASHFS_XZ=y +CONFIG_SQUASHFS_ZSTD=y +CONFIG_FUSE_FS=y +CONFIG_SERIO=y +CONFIG_PCI=y +CONFIG_INPUT=y +CONFIG_INPUT_KEYBOARD=y +CONFIG_KEYBOARD_ATKBD=y +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y +CONFIG_X86_VERBOSE_BOOTUP=y +CONFIG_VGA_CONSOLE=y +CONFIG_FB=y +CONFIG_FB_VESA=y +CONFIG_FRAMEBUFFER_CONSOLE=y +CONFIG_RTC_CLASS=y +CONFIG_RTC_HCTOSYS=y +CONFIG_RTC_DRV_CMOS=y +CONFIG_HYPERVISOR_GUEST=y +CONFIG_PARAVIRT=y +CONFIG_KVM_GUEST=y +CONFIG_KVM=y +CONFIG_KVM_INTEL=y +CONFIG_KVM_AMD=y +CONFIG_VSOCKETS=y +CONFIG_VSOCKETS_DIAG=y +CONFIG_VSOCKETS_LOOPBACK=y +CONFIG_VMWARE_VMCI_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS_COMMON=y +CONFIG_HYPERV_VSOCKETS=y +CONFIG_VMWARE_VMCI=y +CONFIG_VHOST_VSOCK=y +CONFIG_HYPERV=y +CONFIG_UEVENT_HELPER=n +CONFIG_VIRTIO=y +CONFIG_VIRTIO_PCI=y +CONFIG_VIRTIO_MMIO=y +CONFIG_VIRTIO_BALLOON=y +CONFIG_NET=y +CONFIG_NET_CORE=y +CONFIG_NETDEVICES=y +CONFIG_NETWORK_FILESYSTEMS=y +CONFIG_INET=y +CONFIG_NET_9P=y +CONFIG_NET_9P_VIRTIO=y +CONFIG_9P_FS=y +CONFIG_VIRTIO_NET=y +CONFIG_CMDLINE_OVERRIDE=n +CONFIG_BINFMT_SCRIPT=y +CONFIG_SHMEM=y +CONFIG_TMPFS=y +CONFIG_UNIX=y +CONFIG_MODULE_SIG_FORCE=n +CONFIG_DEVTMPFS=y +CONFIG_TTY=y +CONFIG_VT=y +CONFIG_UNIX98_PTYS=y +CONFIG_EARLY_PRINTK=y +CONFIG_INOTIFY_USER=y +CONFIG_BLOCK=y +CONFIG_SCSI_LOWLEVEL=y +CONFIG_SCSI=y +CONFIG_SCSI_VIRTIO=y +CONFIG_BLK_DEV_SD=y +CONFIG_VIRTIO_CONSOLE=y +CONFIG_WATCHDOG=y +CONFIG_WATCHDOG_CORE=y +CONFIG_I6300ESB_WDT=y +CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y +CONFIG_OVERLAY_FS=y +CONFIG_DAX=y +CONFIG_DAX_DRIVER=y +CONFIG_FS_DAX=y +CONFIG_MEMORY_HOTPLUG=y +CONFIG_MEMORY_HOTREMOVE=y +CONFIG_ZONE_DEVICE=y +CONFIG_FUSE_FS=y +CONFIG_VIRTIO_FS=y +CONFIG_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS=y diff --git a/tools/testing/selftests/vsock/settings b/tools/testing/selftests/vsock/settings new file mode 100644 index 0000000000000000000000000000000000000000..694d70710ff08ac9fc91e9ecb5dbdadcf051f019 --- /dev/null +++ b/tools/testing/selftests/vsock/settings @@ -0,0 +1 @@ +timeout=300 diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh new file mode 100755 index 0000000000000000000000000000000000000000..f5f920e83db6d24793b435b373e75d6051b7a9d5 --- /dev/null +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -0,0 +1,441 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (c) 2025 Meta Platforms, Inc. and affiliates +# +# Dependencies: +# * virtme-ng +# * busybox-static (used by virtme-ng) +# * qemu (used by virtme-ng) + +readonly SCRIPT_DIR="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)" + +source ${SCRIPT_DIR}/../kselftest/ktap_helpers.sh + +readonly TAP_PREFIX="# " +readonly VSOCK_TEST=${SCRIPT_DIR}/vsock_test + +readonly TEST_GUEST_PORT=51000 +readonly TEST_HOST_PORT=50000 +readonly TEST_HOST_PORT_LISTENER=50001 +readonly SSH_GUEST_PORT=22 +readonly SSH_HOST_PORT=2222 +readonly VSOCK_CID=1234 +readonly WAIT_PERIOD=3 +readonly WAIT_PERIOD_MAX=60 +readonly WAIT_TOTAL=$(( WAIT_PERIOD * WAIT_PERIOD_MAX )) +readonly QEMU_PIDFILE=$(mktemp /tmp/qemu_vsock_vmtest_XXXX.pid) + +# virtme-ng offers a netdev for ssh when using "--ssh", but we also need a +# control port forwarded for vsock_test. Because virtme-ng doesn't support +# adding an additional port to forward to the device created from "--ssh" and +# virtme-init mistakenly sets identical IPs to the ssh device and additional +# devices, we instead opt out of using --ssh, add the device manually, and also +# add the kernel cmdline options that virtme-init uses to setup the interface. +readonly QEMU_TEST_PORT_FWD="hostfwd=tcp::${TEST_HOST_PORT}-:${TEST_GUEST_PORT}" +readonly QEMU_SSH_PORT_FWD="hostfwd=tcp::${SSH_HOST_PORT}-:${SSH_GUEST_PORT}" +readonly QEMU_OPTS="\ + -netdev user,id=n0,${QEMU_TEST_PORT_FWD},${QEMU_SSH_PORT_FWD} \ + -device virtio-net-pci,netdev=n0 \ + -device vhost-vsock-pci,guest-cid=${VSOCK_CID} \ + --pidfile ${QEMU_PIDFILE} \ +" +readonly KERNEL_CMDLINE="virtme.dhcp net.ifnames=0 biosdevname=0 virtme.ssh virtme_ssh_user=$USER" +readonly LOG=$(mktemp /tmp/vsock_vmtest_XXXX.log) +readonly TEST_NAMES=(vm_server_host_client vm_client_host_server vm_loopback) +readonly TEST_DESCS=( + "Run vsock_test in server mode on the VM and in client mode on the host." + "Run vsock_test in client mode on the VM and in server mode on the host." + "Run vsock_test using the loopback transport in the VM." +) + +VERBOSE=0 + +usage() { + local name + local desc + local i + + echo + echo "$0 [OPTIONS] [TEST]..." + echo "If no TEST argument is given, all tests will be run." + echo + echo "Options" + echo " -v: verbose output" + echo " -q: set the path to or name of qemu binary" + echo + echo "Available tests" + + for ((i = 0; i < ${#TEST_NAMES[@]}; i++)); do + name=${TEST_NAMES[${i}]} + desc=${TEST_DESCS[${i}]} + printf "\t%-35s%-35s\n" "${name}" "${desc}" + done + echo + + exit 1 +} + +die() { + echo "$*" >&2 + exit ${KSFT_FAIL} +} + +vm_ssh() { + ssh -q -o UserKnownHostsFile=/dev/null -p ${SSH_HOST_PORT} localhost $* + return $? +} + +cleanup() { + if [[ -f "${QEMU_PIDFILE}" ]]; then + pkill -SIGTERM -F ${QEMU_PIDFILE} 2>&1 > /dev/null + fi +} + +check_args() { + local found + + for arg in "$@"; do + found=0 + for name in "${TEST_NAMES[@]}"; do + if [[ "${name}" = "${arg}" ]]; then + found=1 + break + fi + done + + if [[ "${found}" -eq 0 ]]; then + echo "${arg} is not an available test" >&2 + usage + fi + done + + for arg in "$@"; do + if ! command -v > /dev/null "test_${arg}"; then + echo "Test ${arg} not found" >&2 + usage + fi + done +} + +check_deps() { + for dep in vng ${QEMU} busybox pkill ssh; do + if [[ ! -x "$(command -v ${dep})" ]]; then + echo -e "skip: dependency ${dep} not found!\n" + exit ${KSFT_SKIP} + fi + done + + if [[ ! -x $(command -v ${VSOCK_TEST}) ]]; then + printf "skip: ${VSOCK_TEST} not found!" + printf " Please build the kselftest vsock target.\n" + exit ${KSFT_SKIP} + fi +} + +vm_start() { + local VNG_OPTS="" + local logfile=/dev/null + local qemu + + qemu=$(command -v ${QEMU}) + + if [[ "${VERBOSE}" = 1 ]]; then + VNG_OPTS="--verbose" + logfile=/dev/stdout + fi + vng \ + $VNG_OPTS \ + --run \ + --qemu-opts="${QEMU_OPTS}" \ + --qemu="${qemu}" \ + --user root \ + --append "${KERNEL_CMDLINE}" \ + --rw &> ${logfile} & + + timeout ${WAIT_TOTAL} \ + bash -c 'while [[ ! -e '"${QEMU_PIDFILE}"' ]]; do sleep 1; done; exit 0' + if [[ ! $? -eq 0 ]]; then + die "failed to boot VM" + fi +} + +vm_wait_for_ssh() { + local i + + i=0 + while [[ true ]]; do + if [[ ${i} -gt ${WAIT_PERIOD_MAX} ]]; then + die "Timed out waiting for guest ssh" + fi + vm_ssh -- true + if [[ $? -eq 0 ]]; then + break + fi + i=$(( i + 1 )) + sleep ${WAIT_PERIOD} + done +} + +# derived from selftests/net/net_helper.sh +wait_for_listener() +{ + local port=$1 + local interval=$2 + local max_intervals=$3 + local protocol=tcp + local pattern + local i + + pattern=":$(printf "%04X" "${port}") " + + # for tcp protocol additionally check the socket state + [ "${protocol}" = "tcp" ] && pattern="${pattern}0A" + for i in $(seq "${max_intervals}"); do + if awk '{print $2" "$4}' /proc/net/"${protocol}"* | \ + grep -q "${pattern}"; then + break + fi + sleep "${interval}" + done +} + +vm_wait_for_listener() { + local port=$1 + + vm_ssh <<EOF +$(declare -f wait_for_listener) +wait_for_listener ${port} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX} +EOF +} + +host_wait_for_listener() { + wait_for_listener ${TEST_HOST_PORT_LISTENER} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX} +} + +__log_stdin() { + cat | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }' +} + +__log_args() { + echo "$*" | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }' +} + +log() { + local prefix="$1" + + shift + local redirect= + if [[ ${VERBOSE} -eq 0 ]]; then + redirect=/dev/null + else + redirect=/dev/stdout + fi + + if [[ "$#" -eq 0 ]]; then + __log_stdin | tee -a ${LOG} > ${redirect} + else + __log_args | tee -a ${LOG} > ${redirect} + fi +} + +log_setup() { + log "setup" "$@" +} + +log_host() { + local testname=$1 + + shift + log "test:${testname}:host" "$@" +} + +log_guest() { + local testname=$1 + + shift + log "test:${testname}:guest" "$@" +} + +tap_prefix() { + sed -e "s/^/${TAP_PREFIX}/" +} + +tap_output() { + if [[ ! -z "$TAP_PREFIX" ]]; then + read str + echo $str + fi +} + +test_vm_server_host_client() { + local testname="${FUNCNAME[0]#test_}" + + vm_ssh -- "${VSOCK_TEST}" \ + --mode=server \ + --control-port="${TEST_GUEST_PORT}" \ + --peer-cid=2 \ + 2>&1 | log_guest "${testname}" & + + vm_wait_for_listener ${TEST_GUEST_PORT} + + ${VSOCK_TEST} \ + --mode=client \ + --control-host=127.0.0.1 \ + --peer-cid="${VSOCK_CID}" \ + --control-port="${TEST_HOST_PORT}" 2>&1 | log_host "${testname}" + + return $? +} + +test_vm_client_host_server() { + local testname="${FUNCNAME[0]#test_}" + + ${VSOCK_TEST} \ + --mode "server" \ + --control-port "${TEST_HOST_PORT_LISTENER}" \ + --peer-cid "${VSOCK_CID}" 2>&1 | log_host "${testname}" & + + host_wait_for_listener + + vm_ssh -- "${VSOCK_TEST}" \ + --mode=client \ + --control-host=10.0.2.2 \ + --peer-cid=2 \ + --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest "${testname}" + + return $? +} + +test_vm_loopback() { + local testname="${FUNCNAME[0]#test_}" + local port=60000 # non-forwarded local port + + vm_ssh -- ${VSOCK_TEST} \ + --mode=server \ + --control-port="${port}" \ + --peer-cid=1 2>&1 | log_guest "${testname}" & + + vm_wait_for_listener ${port} + + vm_ssh -- ${VSOCK_TEST} \ + --mode=client \ + --control-host="127.0.0.1" \ + --control-port="${port}" \ + --peer-cid=1 2>&1 | log_guest "${testname}" + + return $? +} + +run_test() { + local host_oops_cnt_before + local host_warn_cnt_before + local vm_oops_cnt_before + local vm_warn_cnt_before + local host_oops_cnt_after + local host_warn_cnt_after + local vm_oops_cnt_after + local vm_warn_cnt_after + local name + local rc + + host_oops_cnt_before=$(dmesg | grep -c -i 'Oops') + host_warn_cnt_before=$(dmesg --level=warn | wc -l) + vm_oops_cnt_before=$(vm_ssh -- dmesg | grep -c -i 'Oops') + vm_warn_cnt_before=$(vm_ssh -- dmesg --level=warn | wc -l) + + name=$(echo "${1}" | awk '{ print $1 }') + eval test_"${name}" + rc=$? + + host_oops_cnt_after=$(dmesg | grep -i 'Oops' | wc -l) + if [[ ${host_oops_cnt_after} -gt ${host_oops_cnt_before} ]]; then + echo "${name}: kernel oops detected on host" | log_host ${name} + rc=$KSFT_FAIL + fi + + host_warn_cnt_after=$(dmesg --level=warn | wc -l) + if [[ ${host_warn_cnt_after} -gt ${host_warn_cnt_before} ]]; then + echo "${name}: kernel warning detected on host" | log_host ${name} + rc=$KSFT_FAIL + fi + + vm_oops_cnt_after=$(vm_ssh -- dmesg | grep -i 'Oops' | wc -l) + if [[ ${vm_oops_cnt_after} -gt ${vm_oops_cnt_before} ]]; then + echo "${name}: kernel oops detected on vm" | log_host ${name} + rc=$KSFT_FAIL + fi + + vm_warn_cnt_after=$(vm_ssh -- dmesg --level=warn | wc -l) + if [[ ${vm_warn_cnt_after} -gt ${vm_warn_cnt_before} ]]; then + echo "${name}: kernel warning detected on vm" | log_host ${name} + rc=$KSFT_FAIL + fi + + return ${rc} +} + +QEMU="qemu-system-$(uname -m)" + +while getopts :hvsq: o +do + case $o in + v) VERBOSE=1;; + q) QEMU=$OPTARG;; + h|*) usage;; + esac +done +shift $((OPTIND-1)) + +trap cleanup EXIT + +if [[ ${#} -eq 0 ]]; then + ARGS=(${TEST_NAMES[@]}) +else + ARGS=($@) +fi + +check_args "${ARGS[@]}" +check_deps + +echo "TAP version 13" | tap_output +echo "1..${#ARGS[@]}" | tap_output + +log_setup "Booting up VM" +vm_start +vm_wait_for_ssh +log_setup "VM booted up" + +cnt_pass=0 +cnt_fail=0 +cnt_skip=0 +cnt_total=0 +exitcode=0 +for arg in "${ARGS[@]}"; do + run_test "${arg}" + rc=$? + if [[ ${rc} == $KSFT_PASS ]]; then + cnt_pass=$(( cnt_pass + 1 )) + echo "[PASS]" | tap_prefix + echo "ok ${cnt_total} ${arg}" | tap_output + elif [[ ${rc} == $KSFT_SKIP ]]; then + cnt_skip=$(( cnt_skip + 1 )) + echo "[SKIP]" | tap_prefix + echo "ok ${cnt_total} ${arg} # SKIP" | tap_output + exitcode=$KSFT_SKIP + elif [[ ${rc} == $KSFT_FAIL ]]; then + cnt_fail=$(( cnt_fail + 1 )) + echo "[FAIL]" | tap_prefix + echo "not ok ${cnt_total} ${arg} # exit=$rc" | tap_output + exitcode=$KSFT_FAIL + fi + cnt_total=$(( cnt_total + 1 )) +done + +echo "SUMMARY: PASS=${cnt_pass} SKIP=${cnt_skip} FAIL=${cnt_fail}" | tap_prefix + +if [ $((cnt_pass + cnt_skip)) -eq "$KSFT_NUM_TESTS" ]; then + exit "$KSFT_PASS" +else + exit "$KSFT_FAIL" +fi --- base-commit: 8066e388be48f1ad62b0449dc1d31a25489fa12a change-id: 20250325-vsock-vmtest-b3a21d2102c2 Best regards, -- Bobby Eshleman <bobbyeshleman(a)gmail.com>

5 months, 2 weeks

2
2
0 0

[PATCH net-next v6] selftests/vsock: add initial vmtest.sh for vsock

by Bobby Eshleman

This commit introduces a new vmtest.sh runner for vsock. It uses virtme-ng/qemu to run tests in a VM. The tests validate G2H, H2G, and loopback. The testing tools from tools/testing/vsock/ are reused. Currently, only vsock_test is used. VMCI and hyperv support is automatically built, though not used. Only tested on x86. To run: $ make -C tools/testing/selftests TARGETS=vsock $ tools/testing/selftests/vsock/vmtest.sh or $ make -C tools/testing/selftests TARGETS=vsock run_tests Example runs: $ ./tools/testing/selftests/vsock/vmtest.sh TAP version 13 1..3 not ok 0 vm_server_host_client # exit=1 ok 1 vm_client_host_server ok 2 vm_loopback 1..3 $ ./tools/testing/selftests/vsock/vmtest.sh vm_loopback TAP version 13 1..1 ok 0 vm_loopback 1..1 Future work can include vsock_diag_test. The tap output style copies mm's run_vmtests.sh. Because vsock requires a VM to test anything other than loopback, this patch adds vmtest.sh as a kselftest itself. This is different than other systems that have a "vmtest.sh", where it is used as a utility script to spin up a VM to run the selftests as a guest (but isn't hooked into kselftest). Testing in NIPA is still WIP. Signed-off-by: Bobby Eshleman <bobbyeshleman(a)gmail.com> --- Changes in v6: - add make cmd in commit message in vmtest.sh example (Stefano) - check nonzero size of QEMU_PIDFILE using -s conditional (Stefano) - display log file path after tests so it is easier to find amongst other random names - cleanup qemu pidfile if qemu is unable to remove it - make oops/warning failures more obvious with 'FAIL' prefix in log (simply saying 'detected' wasn't clear enough to identify failing condition) - Link to v5: https://lore.kernel.org/r/20250513-vsock-vmtest-v5-1-4e75c4a45ceb@gmail.com Changes in v5: - make log file a tmpfile (Paolo) - make sure both default and user defined QEMU gets handled by the dependency check (Paolo) - increased VM boot up timeout from 1m to 3m for slow hosts (Paolo) - rename vm_setup -> vm_start (Paolo) - derive wait_for_listener from selftests/net/net_helper.sh to removes ss usage - Remove unused 'unset IFS' line (Paolo) - leave space after variable declarations (Paolo) - make QEMU_PIDFILE a tmp file (Paolo) - make everything readonly that is only read (Paolo) - source ktap_helpers.sh for KSFT_PASS and friends (Paolo) - don't check for timeout util (Paolo) - add missing usage string for -q qemu arg - add tap prefix to SUMMARY line since it isn't part of TAP protocol - exit with the correct status code based on failure/pass counts - Link to v4: https://lore.kernel.org/r/20250507-vsock-vmtest-v4-1-6e2a97262cd6@gmail.com Changes in v4: - do not use special tab delimiter for help string parsing (Stefano + Paolo) - fix paths for when installing kselftest and running out-of-tree (Paolo) - change vng to using running kernel instead of compiled kernel (Paolo) - use multi-line string for QEMU_OPTS (Stefano) - change timeout to 300s (Paolo) - skip if tools are not found and use kselftests status codes (Paolo) - remove build from vmtest.sh (Paolo) - change 2222 -> SSH_HOST_PORT (Stefano) - add tap-format output - add vmtest.log to gitignore - check for vsock_test binary and remind user to build it if missing - create a proper build in makefile - style fixes - add ssh, timeout, and pkill to dependency check, just in case - fix numerical comparison in conditionals - check qemu pidfile exists before proceeding (avoid wasting time waiting for ssh) - fix tracking of pass/fail bug - fix stderr redirection bug - Link to v3: https://lore.kernel.org/r/20250428-vsock-vmtest-v3-1-181af6163f3e@gmail.com Changes in v3: - use common conditional syntax for checking variables - use return value instead of global rc - fix typo TEST_HOST_LISTENER_PORT -> TEST_HOST_PORT_LISTENER - use SIGTERM instead of SIGKILL on cleanup - use peer-cid=1 for loopback - change sleep delay times into globals - fix test_vm_loopback logging - add test selection in arguments - make QEMU an argument - check that vng binary is on path - use QEMU variable - change <tab><backslash> to <space><backslash> - fix hardcoded file paths - add comment in commit msg about script that vmtest.sh was based off of - Add tools/testing/selftest/vsock/Makefile for kselftest - Link to v2: https://lore.kernel.org/r/20250417-vsock-vmtest-v2-1-3901a27331e8@gmail.com Changes in v2: - add kernel oops and warnings checker - change testname variable to use FUNCNAME - fix spacing in test_vm_server_host_client - add -s skip build option to vmtest.sh - add test_vm_loopback - pass port to vm_wait_for_listener - fix indentation in vmtest.sh - add vmci and hyperv to config - changed whitespace from tabs to spaces in help string - Link to v1: https://lore.kernel.org/r/20250410-vsock-vmtest-v1-1-f35a81dab98c@gmail.com --- MAINTAINERS | 1 + tools/testing/selftests/vsock/.gitignore | 2 + tools/testing/selftests/vsock/Makefile | 16 ++ tools/testing/selftests/vsock/config | 114 ++++++++ tools/testing/selftests/vsock/settings | 1 + tools/testing/selftests/vsock/vmtest.sh | 448 +++++++++++++++++++++++++++++++ 6 files changed, 582 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 657a67f9031ef7798c19ac63e6383d4cb18a9e1f..3fbdd7bbfce7196a3cc7db70203317c6bd0e51fd 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -25751,6 +25751,7 @@ F: include/uapi/linux/vm_sockets.h F: include/uapi/linux/vm_sockets_diag.h F: include/uapi/linux/vsockmon.h F: net/vmw_vsock/ +F: tools/testing/selftests/vsock/ F: tools/testing/vsock/ VMALLOC diff --git a/tools/testing/selftests/vsock/.gitignore b/tools/testing/selftests/vsock/.gitignore new file mode 100644 index 0000000000000000000000000000000000000000..9c5bf379480f829a14713d5f5dc7d525bc272e84 --- /dev/null +++ b/tools/testing/selftests/vsock/.gitignore @@ -0,0 +1,2 @@ +vmtest.log +vsock_test diff --git a/tools/testing/selftests/vsock/Makefile b/tools/testing/selftests/vsock/Makefile new file mode 100644 index 0000000000000000000000000000000000000000..7ab4970e5e8a019be33f96a36f95c00573d7bfcf --- /dev/null +++ b/tools/testing/selftests/vsock/Makefile @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0 + +CURDIR := $(abspath .) +TOOLSDIR := $(abspath ../../..) + +$(OUTPUT)/vsock_test: $(TOOLSDIR)/testing/vsock/vsock_test + install -m 755 $< $@ + +$(TOOLSDIR)/testing/vsock/vsock_test: + $(MAKE) -C $(TOOLSDIR)/testing/vsock vsock_test + +TEST_PROGS += vmtest.sh +TEST_GEN_FILES := vsock_test + +include ../lib.mk + diff --git a/tools/testing/selftests/vsock/config b/tools/testing/selftests/vsock/config new file mode 100644 index 0000000000000000000000000000000000000000..3bffaaf98fff92dc0e3bc1286afa3d8d5d52f4c7 --- /dev/null +++ b/tools/testing/selftests/vsock/config @@ -0,0 +1,114 @@ +CONFIG_BLK_DEV_INITRD=y +CONFIG_BPF=y +CONFIG_BPF_SYSCALL=y +CONFIG_BPF_JIT=y +CONFIG_HAVE_EBPF_JIT=y +CONFIG_BPF_EVENTS=y +CONFIG_FTRACE_SYSCALLS=y +CONFIG_FUNCTION_TRACER=y +CONFIG_HAVE_DYNAMIC_FTRACE=y +CONFIG_DYNAMIC_FTRACE=y +CONFIG_HAVE_KPROBES=y +CONFIG_KPROBES=y +CONFIG_KPROBE_EVENTS=y +CONFIG_ARCH_SUPPORTS_UPROBES=y +CONFIG_UPROBES=y +CONFIG_UPROBE_EVENTS=y +CONFIG_DEBUG_FS=y +CONFIG_FW_CFG_SYSFS=y +CONFIG_FW_CFG_SYSFS_CMDLINE=y +CONFIG_DRM=y +CONFIG_DRM_VIRTIO_GPU=y +CONFIG_DRM_VIRTIO_GPU_KMS=y +CONFIG_DRM_BOCHS=y +CONFIG_VIRTIO_IOMMU=y +CONFIG_SOUND=y +CONFIG_SND=y +CONFIG_SND_SEQUENCER=y +CONFIG_SND_PCI=y +CONFIG_SND_INTEL8X0=y +CONFIG_SND_HDA_CODEC_REALTEK=y +CONFIG_SECURITYFS=y +CONFIG_CGROUP_BPF=y +CONFIG_SQUASHFS=y +CONFIG_SQUASHFS_XZ=y +CONFIG_SQUASHFS_ZSTD=y +CONFIG_FUSE_FS=y +CONFIG_SERIO=y +CONFIG_PCI=y +CONFIG_INPUT=y +CONFIG_INPUT_KEYBOARD=y +CONFIG_KEYBOARD_ATKBD=y +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y +CONFIG_X86_VERBOSE_BOOTUP=y +CONFIG_VGA_CONSOLE=y +CONFIG_FB=y +CONFIG_FB_VESA=y +CONFIG_FRAMEBUFFER_CONSOLE=y +CONFIG_RTC_CLASS=y +CONFIG_RTC_HCTOSYS=y +CONFIG_RTC_DRV_CMOS=y +CONFIG_HYPERVISOR_GUEST=y +CONFIG_PARAVIRT=y +CONFIG_KVM_GUEST=y +CONFIG_KVM=y +CONFIG_KVM_INTEL=y +CONFIG_KVM_AMD=y +CONFIG_VSOCKETS=y +CONFIG_VSOCKETS_DIAG=y +CONFIG_VSOCKETS_LOOPBACK=y +CONFIG_VMWARE_VMCI_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS_COMMON=y +CONFIG_HYPERV_VSOCKETS=y +CONFIG_VMWARE_VMCI=y +CONFIG_VHOST_VSOCK=y +CONFIG_HYPERV=y +CONFIG_UEVENT_HELPER=n +CONFIG_VIRTIO=y +CONFIG_VIRTIO_PCI=y +CONFIG_VIRTIO_MMIO=y +CONFIG_VIRTIO_BALLOON=y +CONFIG_NET=y +CONFIG_NET_CORE=y +CONFIG_NETDEVICES=y +CONFIG_NETWORK_FILESYSTEMS=y +CONFIG_INET=y +CONFIG_NET_9P=y +CONFIG_NET_9P_VIRTIO=y +CONFIG_9P_FS=y +CONFIG_VIRTIO_NET=y +CONFIG_CMDLINE_OVERRIDE=n +CONFIG_BINFMT_SCRIPT=y +CONFIG_SHMEM=y +CONFIG_TMPFS=y +CONFIG_UNIX=y +CONFIG_MODULE_SIG_FORCE=n +CONFIG_DEVTMPFS=y +CONFIG_TTY=y +CONFIG_VT=y +CONFIG_UNIX98_PTYS=y +CONFIG_EARLY_PRINTK=y +CONFIG_INOTIFY_USER=y +CONFIG_BLOCK=y +CONFIG_SCSI_LOWLEVEL=y +CONFIG_SCSI=y +CONFIG_SCSI_VIRTIO=y +CONFIG_BLK_DEV_SD=y +CONFIG_VIRTIO_CONSOLE=y +CONFIG_WATCHDOG=y +CONFIG_WATCHDOG_CORE=y +CONFIG_I6300ESB_WDT=y +CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y +CONFIG_OVERLAY_FS=y +CONFIG_DAX=y +CONFIG_DAX_DRIVER=y +CONFIG_FS_DAX=y +CONFIG_MEMORY_HOTPLUG=y +CONFIG_MEMORY_HOTREMOVE=y +CONFIG_ZONE_DEVICE=y +CONFIG_FUSE_FS=y +CONFIG_VIRTIO_FS=y +CONFIG_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS=y diff --git a/tools/testing/selftests/vsock/settings b/tools/testing/selftests/vsock/settings new file mode 100644 index 0000000000000000000000000000000000000000..694d70710ff08ac9fc91e9ecb5dbdadcf051f019 --- /dev/null +++ b/tools/testing/selftests/vsock/settings @@ -0,0 +1 @@ +timeout=300 diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh new file mode 100755 index 0000000000000000000000000000000000000000..e92e72a2c6480d918351bdd49baf106be4a29785 --- /dev/null +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -0,0 +1,448 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (c) 2025 Meta Platforms, Inc. and affiliates +# +# Dependencies: +# * virtme-ng +# * busybox-static (used by virtme-ng) +# * qemu (used by virtme-ng) + +readonly SCRIPT_DIR="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)" + +source ${SCRIPT_DIR}/../kselftest/ktap_helpers.sh + +readonly TAP_PREFIX="# " +readonly VSOCK_TEST=${SCRIPT_DIR}/vsock_test + +readonly TEST_GUEST_PORT=51000 +readonly TEST_HOST_PORT=50000 +readonly TEST_HOST_PORT_LISTENER=50001 +readonly SSH_GUEST_PORT=22 +readonly SSH_HOST_PORT=2222 +readonly VSOCK_CID=1234 +readonly WAIT_PERIOD=3 +readonly WAIT_PERIOD_MAX=60 +readonly WAIT_TOTAL=$(( WAIT_PERIOD * WAIT_PERIOD_MAX )) +readonly QEMU_PIDFILE=$(mktemp /tmp/qemu_vsock_vmtest_XXXX.pid) + +# virtme-ng offers a netdev for ssh when using "--ssh", but we also need a +# control port forwarded for vsock_test. Because virtme-ng doesn't support +# adding an additional port to forward to the device created from "--ssh" and +# virtme-init mistakenly sets identical IPs to the ssh device and additional +# devices, we instead opt out of using --ssh, add the device manually, and also +# add the kernel cmdline options that virtme-init uses to setup the interface. +readonly QEMU_TEST_PORT_FWD="hostfwd=tcp::${TEST_HOST_PORT}-:${TEST_GUEST_PORT}" +readonly QEMU_SSH_PORT_FWD="hostfwd=tcp::${SSH_HOST_PORT}-:${SSH_GUEST_PORT}" +readonly QEMU_OPTS="\ + -netdev user,id=n0,${QEMU_TEST_PORT_FWD},${QEMU_SSH_PORT_FWD} \ + -device virtio-net-pci,netdev=n0 \ + -device vhost-vsock-pci,guest-cid=${VSOCK_CID} \ + --pidfile ${QEMU_PIDFILE} \ +" +readonly KERNEL_CMDLINE="virtme.dhcp net.ifnames=0 biosdevname=0 virtme.ssh virtme_ssh_user=$USER" +readonly LOG=$(mktemp /tmp/vsock_vmtest_XXXX.log) +readonly TEST_NAMES=(vm_server_host_client vm_client_host_server vm_loopback) +readonly TEST_DESCS=( + "Run vsock_test in server mode on the VM and in client mode on the host." + "Run vsock_test in client mode on the VM and in server mode on the host." + "Run vsock_test using the loopback transport in the VM." +) + +VERBOSE=0 + +usage() { + local name + local desc + local i + + echo + echo "$0 [OPTIONS] [TEST]..." + echo "If no TEST argument is given, all tests will be run." + echo + echo "Options" + echo " -v: verbose output" + echo " -q: set the path to or name of qemu binary" + echo + echo "Available tests" + + for ((i = 0; i < ${#TEST_NAMES[@]}; i++)); do + name=${TEST_NAMES[${i}]} + desc=${TEST_DESCS[${i}]} + printf "\t%-35s%-35s\n" "${name}" "${desc}" + done + echo + + exit 1 +} + +die() { + echo "$*" >&2 + exit ${KSFT_FAIL} +} + +vm_ssh() { + ssh -q -o UserKnownHostsFile=/dev/null -p ${SSH_HOST_PORT} localhost $* + return $? +} + +cleanup() { + if [[ -s "${QEMU_PIDFILE}" ]]; then + pkill -SIGTERM -F ${QEMU_PIDFILE} 2>&1 > /dev/null + fi + + # If failure occurred during or before qemu start up, then we need + # to clean this up ourselves. + if [[ -e "${QEMU_PIDFILE}" ]]; then + rm "${QEMU_PIDFILE}" + fi +} + +check_args() { + local found + + for arg in "$@"; do + found=0 + for name in "${TEST_NAMES[@]}"; do + if [[ "${name}" = "${arg}" ]]; then + found=1 + break + fi + done + + if [[ "${found}" -eq 0 ]]; then + echo "${arg} is not an available test" >&2 + usage + fi + done + + for arg in "$@"; do + if ! command -v > /dev/null "test_${arg}"; then + echo "Test ${arg} not found" >&2 + usage + fi + done +} + +check_deps() { + for dep in vng ${QEMU} busybox pkill ssh; do + if [[ ! -x "$(command -v ${dep})" ]]; then + echo -e "skip: dependency ${dep} not found!\n" + exit ${KSFT_SKIP} + fi + done + + if [[ ! -x $(command -v ${VSOCK_TEST}) ]]; then + printf "skip: ${VSOCK_TEST} not found!" + printf " Please build the kselftest vsock target.\n" + exit ${KSFT_SKIP} + fi +} + +vm_start() { + local VNG_OPTS="" + local logfile=/dev/null + local qemu + + qemu=$(command -v ${QEMU}) + + if [[ "${VERBOSE}" = 1 ]]; then + VNG_OPTS="--verbose" + logfile=/dev/stdout + fi + vng \ + $VNG_OPTS \ + --run \ + --qemu-opts="${QEMU_OPTS}" \ + --qemu="${qemu}" \ + --user root \ + --append "${KERNEL_CMDLINE}" \ + --rw &> ${logfile} & + + timeout ${WAIT_TOTAL} \ + bash -c 'while [[ ! -s '"${QEMU_PIDFILE}"' ]]; do sleep 1; done; exit 0' + if [[ ! $? -eq 0 ]]; then + die "failed to boot VM" + fi +} + +vm_wait_for_ssh() { + local i + + i=0 + while [[ true ]]; do + if [[ ${i} -gt ${WAIT_PERIOD_MAX} ]]; then + die "Timed out waiting for guest ssh" + fi + vm_ssh -- true + if [[ $? -eq 0 ]]; then + break + fi + i=$(( i + 1 )) + sleep ${WAIT_PERIOD} + done +} + +# derived from selftests/net/net_helper.sh +wait_for_listener() +{ + local port=$1 + local interval=$2 + local max_intervals=$3 + local protocol=tcp + local pattern + local i + + pattern=":$(printf "%04X" "${port}") " + + # for tcp protocol additionally check the socket state + [ "${protocol}" = "tcp" ] && pattern="${pattern}0A" + for i in $(seq "${max_intervals}"); do + if awk '{print $2" "$4}' /proc/net/"${protocol}"* | \ + grep -q "${pattern}"; then + break + fi + sleep "${interval}" + done +} + +vm_wait_for_listener() { + local port=$1 + + vm_ssh <<EOF +$(declare -f wait_for_listener) +wait_for_listener ${port} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX} +EOF +} + +host_wait_for_listener() { + wait_for_listener ${TEST_HOST_PORT_LISTENER} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX} +} + +__log_stdin() { + cat | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }' +} + +__log_args() { + echo "$*" | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }' +} + +log() { + local prefix="$1" + + shift + local redirect= + if [[ ${VERBOSE} -eq 0 ]]; then + redirect=/dev/null + else + redirect=/dev/stdout + fi + + if [[ "$#" -eq 0 ]]; then + __log_stdin | tee -a ${LOG} > ${redirect} + else + __log_args | tee -a ${LOG} > ${redirect} + fi +} + +log_setup() { + log "setup" "$@" +} + +log_host() { + local testname=$1 + + shift + log "test:${testname}:host" "$@" +} + +log_guest() { + local testname=$1 + + shift + log "test:${testname}:guest" "$@" +} + +tap_prefix() { + sed -e "s/^/${TAP_PREFIX}/" +} + +tap_output() { + if [[ ! -z "$TAP_PREFIX" ]]; then + read str + echo $str + fi +} + +test_vm_server_host_client() { + local testname="${FUNCNAME[0]#test_}" + + vm_ssh -- "${VSOCK_TEST}" \ + --mode=server \ + --control-port="${TEST_GUEST_PORT}" \ + --peer-cid=2 \ + 2>&1 | log_guest "${testname}" & + + vm_wait_for_listener ${TEST_GUEST_PORT} + + ${VSOCK_TEST} \ + --mode=client \ + --control-host=127.0.0.1 \ + --peer-cid="${VSOCK_CID}" \ + --control-port="${TEST_HOST_PORT}" 2>&1 | log_host "${testname}" + + return $? +} + +test_vm_client_host_server() { + local testname="${FUNCNAME[0]#test_}" + + ${VSOCK_TEST} \ + --mode "server" \ + --control-port "${TEST_HOST_PORT_LISTENER}" \ + --peer-cid "${VSOCK_CID}" 2>&1 | log_host "${testname}" & + + host_wait_for_listener + + vm_ssh -- "${VSOCK_TEST}" \ + --mode=client \ + --control-host=10.0.2.2 \ + --peer-cid=2 \ + --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest "${testname}" + + return $? +} + +test_vm_loopback() { + local testname="${FUNCNAME[0]#test_}" + local port=60000 # non-forwarded local port + + vm_ssh -- ${VSOCK_TEST} \ + --mode=server \ + --control-port="${port}" \ + --peer-cid=1 2>&1 | log_guest "${testname}" & + + vm_wait_for_listener ${port} + + vm_ssh -- ${VSOCK_TEST} \ + --mode=client \ + --control-host="127.0.0.1" \ + --control-port="${port}" \ + --peer-cid=1 2>&1 | log_guest "${testname}" + + return $? +} + +run_test() { + local host_oops_cnt_before + local host_warn_cnt_before + local vm_oops_cnt_before + local vm_warn_cnt_before + local host_oops_cnt_after + local host_warn_cnt_after + local vm_oops_cnt_after + local vm_warn_cnt_after + local name + local rc + + host_oops_cnt_before=$(dmesg | grep -c -i 'Oops') + host_warn_cnt_before=$(dmesg --level=warn | wc -l) + vm_oops_cnt_before=$(vm_ssh -- dmesg | grep -c -i 'Oops') + vm_warn_cnt_before=$(vm_ssh -- dmesg --level=warn | wc -l) + + name=$(echo "${1}" | awk '{ print $1 }') + eval test_"${name}" + rc=$? + + host_oops_cnt_after=$(dmesg | grep -i 'Oops' | wc -l) + if [[ ${host_oops_cnt_after} -gt ${host_oops_cnt_before} ]]; then + echo "FAIL: kernel oops detected on host" | log_host ${name} + rc=$KSFT_FAIL + fi + + host_warn_cnt_after=$(dmesg --level=warn | wc -l) + if [[ ${host_warn_cnt_after} -gt ${host_warn_cnt_before} ]]; then + echo "FAIL: kernel warning detected on host" | log_host ${name} + rc=$KSFT_FAIL + fi + + vm_oops_cnt_after=$(vm_ssh -- dmesg | grep -i 'Oops' | wc -l) + if [[ ${vm_oops_cnt_after} -gt ${vm_oops_cnt_before} ]]; then + echo "FAIL: kernel oops detected on vm" | log_host ${name} + rc=$KSFT_FAIL + fi + + vm_warn_cnt_after=$(vm_ssh -- dmesg --level=warn | wc -l) + if [[ ${vm_warn_cnt_after} -gt ${vm_warn_cnt_before} ]]; then + echo "FAIL: kernel warning detected on vm" | log_host ${name} + rc=$KSFT_FAIL + fi + + return ${rc} +} + +QEMU="qemu-system-$(uname -m)" + +while getopts :hvsq: o +do + case $o in + v) VERBOSE=1;; + q) QEMU=$OPTARG;; + h|*) usage;; + esac +done +shift $((OPTIND-1)) + +trap cleanup EXIT + +if [[ ${#} -eq 0 ]]; then + ARGS=(${TEST_NAMES[@]}) +else + ARGS=($@) +fi + +check_args "${ARGS[@]}" +check_deps + +echo "TAP version 13" | tap_output +echo "1..${#ARGS[@]}" | tap_output + +log_setup "Booting up VM" +vm_start +vm_wait_for_ssh +log_setup "VM booted up" + +cnt_pass=0 +cnt_fail=0 +cnt_skip=0 +cnt_total=0 +exitcode=0 +for arg in "${ARGS[@]}"; do + run_test "${arg}" + rc=$? + if [[ ${rc} == $KSFT_PASS ]]; then + cnt_pass=$(( cnt_pass + 1 )) + echo "[PASS]" | tap_prefix + echo "ok ${cnt_total} ${arg}" | tap_output + elif [[ ${rc} == $KSFT_SKIP ]]; then + cnt_skip=$(( cnt_skip + 1 )) + echo "[SKIP]" | tap_prefix + echo "ok ${cnt_total} ${arg} # SKIP" | tap_output + exitcode=$KSFT_SKIP + elif [[ ${rc} == $KSFT_FAIL ]]; then + cnt_fail=$(( cnt_fail + 1 )) + echo "[FAIL]" | tap_prefix + echo "not ok ${cnt_total} ${arg} # exit=$rc" | tap_output + exitcode=$KSFT_FAIL + fi + cnt_total=$(( cnt_total + 1 )) +done + +echo "SUMMARY: PASS=${cnt_pass} SKIP=${cnt_skip} FAIL=${cnt_fail}" | tap_prefix +echo "Log: ${LOG}" | tap_prefix + +if [ $((cnt_pass + cnt_skip)) -eq "$KSFT_NUM_TESTS" ]; then + exit "$KSFT_PASS" +else + exit "$KSFT_FAIL" +fi --- base-commit: 8066e388be48f1ad62b0449dc1d31a25489fa12a change-id: 20250325-vsock-vmtest-b3a21d2102c2 Best regards, -- Bobby Eshleman <bobbyeshleman(a)gmail.com>

5 months, 2 weeks

1
0
0 0

LFX Mentorship: Kselftest Patch Submission - Message Clarity Improvement in futex_requeue

by Shivam Sharma

Hi maintainers, As part of the Kselftest task for the LFX Mentorship Program, I have reviewed the futex selftest and made minor improvements to the message clarity in `futex_requeue.c`. Attached is the patch with the changes. I’ve also uploaded it to the mentorship platform as instructed. Please let me know if any changes are needed. Thanks, Shivam Sharma 10sharmashivam(a)gmail.com

5 months, 2 weeks

1
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[PATCH] selftests: remove duplicated function definition

by Chen Linxuan

I failed to build this test on Ubuntu 24.04. Compiler complains that function sys_open_tree has already been defined in "../filesystems/overlayfs/wrappers.h". Signed-off-by: Chen Linxuan <chenlinxuan(a)uniontech.com> --- tools/testing/selftests/mount_setattr/mount_setattr_test.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c index 48a000cabc971..eaa4e912120ab 100644 --- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c +++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c @@ -173,11 +173,6 @@ static inline int sys_mount_setattr(int dfd, const char *path, unsigned int flag #define AT_RECURSIVE 0x8000 /* Apply to the entire subtree */ #endif -static inline int sys_open_tree(int dfd, const char *filename, unsigned int flags) -{ - return syscall(__NR_open_tree, dfd, filename, flags); -} - static ssize_t write_nointr(int fd, const void *buf, size_t count) { ssize_t ret; -- 2.43.0

5 months, 2 weeks

2
1
0 0

[PATCH] selftests/mm: Deduplicate default page size test results in thuge-gen

by Mark Brown

The thuge-gen test program runs mmap() and shmget() tests for both every available page size and the default page size, resulting in two tests for the default size. These tests are distinct since the flags in the default case do not specify an explicit size, add the flags to the test name that is logged to deduplicate. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/mm/thuge-gen.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c index cd5174d735be..a41bc1234b37 100644 --- a/tools/testing/selftests/mm/thuge-gen.c +++ b/tools/testing/selftests/mm/thuge-gen.c @@ -127,7 +127,7 @@ void test_mmap(unsigned long size, unsigned flags) show(size); ksft_test_result(size == getpagesize() || (before - after) == NUM_PAGES, - "%s mmap %lu\n", __func__, size); + "%s mmap %lu %x\n", __func__, size, flags); if (munmap(map, size * NUM_PAGES)) ksft_exit_fail_msg("%s: unmap %s\n", __func__, strerror(errno)); @@ -165,7 +165,7 @@ void test_shmget(unsigned long size, unsigned flags) show(size); ksft_test_result(size == getpagesize() || (before - after) == NUM_PAGES, - "%s: mmap %lu\n", __func__, size); + "%s: mmap %lu %x\n", __func__, size, flags); if (shmdt(map)) ksft_exit_fail_msg("%s: shmdt: %s\n", __func__, strerror(errno)); } --- base-commit: 82f2b0b97b36ee3fcddf0f0780a9a0825d52fec3 change-id: 20250514-selfests-mm-thuge-gen-dup-7e1c40716091 Best regards, -- Mark Brown <broonie(a)kernel.org>

5 months, 2 weeks

2
1
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[PATCH] selftests/mm: Deduplicate test logging in test_mlock_lock()

by Mark Brown

The mlock2-tests test_mlock_lock() test reports two test results with an identical string, one reporitng if it successfully locked a block of memory and another reporting if the lock is still present after doing an unlock (following a similar pattern to other tests in the same program). This confuses test automation since the test string is used to deduplicate tests, change the post unlock test to report "Unlocked" instead like the other tests to fix this. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/mm/mlock2-tests.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c index 7f0d50fa361d..3e90ff37e336 100644 --- a/tools/testing/selftests/mm/mlock2-tests.c +++ b/tools/testing/selftests/mm/mlock2-tests.c @@ -196,7 +196,7 @@ static void test_mlock_lock(void) ksft_exit_fail_msg("munlock(): %s\n", strerror(errno)); } - ksft_test_result(!unlock_lock_check(map), "%s: Locked\n", __func__); + ksft_test_result(!unlock_lock_check(map), "%s: Unlocked\n", __func__); munmap(map, 2 * page_size); } --- base-commit: 82f2b0b97b36ee3fcddf0f0780a9a0825d52fec3 change-id: 20250514-selftest-mm-mlock2-dup-277d586bb29d Best regards, -- Mark Brown <broonie(a)kernel.org>

5 months, 2 weeks

2
1
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[PATCH v15 net-next 0/5] DUALPI2 patch

by chia-yu.chang＠nokia-bell-labs.com

From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com> Hello, Please find the DualPI2 patch v14. v15 (09-May-2025) - Add enum of TCA_DUALPI2_ECN_MASK_CLA_ECT to remove potential leakeage in #1 (Simon Horman <horms(a)kernel.org>) - Fix one typo in comment of #2 - Update tc.yaml in #5 to aligh with the updated enum of pkt_sched.h v14 (05-May-2025) - Modify tc.yaml: (1) Replace flags with enum and remove enum-as-flags, (2) Remove credit-queue in xstats, and (3) Change attribute types (Donald Hunter <donald.hun - Add enum and fix the ordering of variables in pkt_sched.h to align with the modified tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>) - Add validators for DROP_OVERLOAD, DROP_EARLY, ECN_MASK, and SPLIT_GSO in sch_dualpi2.c (Donald Hunter <donald.hunter(a)gmail.com>) - Update dualpi2.json to align with the updated variable order in pkt_sched.h. - Reorder patches (Donald Hunter <donald.hunter(a)gmail.com>) v13 (26-Apr-2025) - Use dashes in member names to follow YNL conventions in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>) - Define enumerations separately for flags of drop-early, drop-overload, ecn-mask, credit-queue in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>) - Change the types of split-gso and step-packets into flag in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>) - Revert to u32/u8 types for tc-dualpi2-xstats members in tc.yaml (Donald Hunter <donald.hunter(a)gmail.com>) - Add new test cases in tc-tests/qdiscs/dualpi2.json to cover all dualpi2 paramters (Donald Hunter <donald.hunter(a)gmail.com>) - Change the type of TCA_DUALPI2_STEP_PACKETS into NLA_FLAG (Donald Hunter <donald.hunter(a)gmail.com>) v12 (22-Apr-2025) - Remove anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>) - Replace u32/u8 with uint and s32 with int in tc spec document (Paolo Abeni <pabeni(a)redhat.com>) - Introduce get_memory_limit function to handle potential overflow when multipling limit with MTU (Paolo Abeni <pabeni(a)redhat.com>) - Double the packet length to further include packet overhead in memory_limit (Paolo Abeni <pabeni(a)redhat.com>) - Remove the check of qdisc_qlen(sch) when calling qdisc_tree_reduce_backlog (Paolo Abeni <pabeni(a)redhat.com>) v11 (15-Apr-2025) - Replace hstimer_init with hstimer_setup in sch_dualpi2.c v10 (25-Mar-2025) - Remove leftover include in include/linux/netdevice.h and anonymous struct in sch_dualpi2.c (Paolo Abeni <pabeni(a)redhat.com>) - Use kfree_skb_reason() and add SKB_DROP_REASON_DUALPI2_STEP_DROP drop reason (Paolo Abeni <pabeni(a)redhat.com>) - Split sch_dualpi2.c into 3 patches (and overall 5 patches): Struct definition & parsing, Dump stats & configuration, Enqueue/Dequeue (Paolo Abeni <pabeni(a)redhat.com>) v9 (16-Mar-2025) - Fix mem_usage error in previous version - Add min_qlen_step to the dualpi2 attribute as the minimum queue length in number of packets in the L-queue to start step threshold marking. In previous versions, this value was fixed to 2, so the step threshold was applied to mark packets in the L queue only when the queue length of the L queue was greater than or equal to 2 packets. This will cause larger queuing delays for L4S traffic at low rates (<20Mbps). So we parameterize it and change the default value to 0. Comparison of tcp_1down run 'HTB 20Mbit + DUALPI2 + 10ms base delay' Old versions: avg median # data pts Ping (ms) ICMP : 11.55 11.70 ms 350 TCP upload avg : 18.96 N/A Mbits/s 350 TCP upload sum : 18.96 N/A Mbits/s 350 New version (v9): avg median # data pts Ping (ms) ICMP : 10.81 10.70 ms 350 TCP upload avg : 18.91 N/A Mbits/s 350 TCP upload sum : 18.91 N/A Mbits/s 350 Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay' Old versions: avg median # data pts Ping (ms) ICMP : 12.61 12.80 ms 350 TCP upload avg : 9.48 N/A Mbits/s 350 TCP upload sum : 9.48 N/A Mbits/s 350 New version (v9): avg median # data pts Ping (ms) ICMP : 11.06 10.80 ms 350 TCP upload avg : 9.43 N/A Mbits/s 350 TCP upload sum : 9.43 N/A Mbits/s 350 Comparison of tcp_1down run 'HTB 10Mbit + DUALPI2 + 10ms base delay' Old versions: avg median # data pts Ping (ms) ICMP : 40.86 37.45 ms 350 TCP upload avg : 0.88 N/A Mbits/s 350 TCP upload sum : 0.88 N/A Mbits/s 350 TCP upload::1 : 0.88 0.97 Mbits/s 350 New version (v9): avg median # data pts Ping (ms) ICMP : 11.07 10.40 ms 350 TCP upload avg : 0.55 N/A Mbits/s 350 TCP upload sum : 0.55 N/A Mbits/s 350 TCP upload::1 : 0.55 0.59 Mbits/s 350 v8 (11-Mar-2025) - Fix warning messages in v7 v7 (07-Mar-2025) - Separate into 3 patches to avoid mixing changes of documentation, selftest, and code. (Cong Wang <xiyou.wangcong(a)gmail.com>) v6 (04-Mar-2025) - Add modprobe for dulapi2 in tc-testing script tc-testing/tdc.sh (Jakub Kicinski <kuba(a)kernel.org>) - Update test cases in dualpi2.json - Update commit message v5 (22-Feb-2025) - A comparison was done between MQ + DUALPI2, MQ + FQ_PIE, MQ + FQ_CODEL: Unshaped 1gigE with 4 download streams test: - Summary of tcp_4down run 'MQ + FQ_CODEL': avg median # data pts Ping (ms) ICMP : 1.19 1.34 ms 349 TCP download avg : 235.42 N/A Mbits/s 349 TCP download sum : 941.68 N/A Mbits/s 349 TCP download::1 : 235.19 235.39 Mbits/s 349 TCP download::2 : 235.03 235.35 Mbits/s 349 TCP download::3 : 236.89 235.44 Mbits/s 349 TCP download::4 : 234.57 235.19 Mbits/s 349 - Summary of tcp_4down run 'MQ + FQ_PIE' avg median # data pts Ping (ms) ICMP : 1.21 1.37 ms 350 TCP download avg : 235.42 N/A Mbits/s 350 TCP download sum : 941.61 N/A Mbits/s 350 TCP download::1 : 232.54 233.13 Mbits/s 350 TCP download::2 : 232.52 232.80 Mbits/s 350 TCP download::3 : 233.14 233.78 Mbits/s 350 TCP download::4 : 243.41 241.48 Mbits/s 350 - Summary of tcp_4down run 'MQ + DUALPI2' avg median # data pts Ping (ms) ICMP : 1.19 1.34 ms 349 TCP download avg : 235.42 N/A Mbits/s 349 TCP download sum : 941.68 N/A Mbits/s 349 TCP download::1 : 235.19 235.39 Mbits/s 349 TCP download::2 : 235.03 235.35 Mbits/s 349 TCP download::3 : 236.89 235.44 Mbits/s 349 TCP download::4 : 234.57 235.19 Mbits/s 349 Unshaped 1gigE with 128 download streams test: - Summary of tcp_128down run 'MQ + FQ_CODEL': avg median # data pts Ping (ms) ICMP : 1.88 1.86 ms 350 TCP download avg : 7.39 N/A Mbits/s 350 TCP download sum : 946.47 N/A Mbits/s 350 - Summary of tcp_128down run 'MQ + FQ_PIE': avg median # data pts Ping (ms) ICMP : 1.88 1.86 ms 350 TCP download avg : 7.39 N/A Mbits/s 350 TCP download sum : 946.47 N/A Mbits/s 350 - Summary of tcp_128down run 'MQ + DUALPI2': avg median # data pts Ping (ms) ICMP : 1.88 1.86 ms 350 TCP download avg : 7.39 N/A Mbits/s 350 TCP download sum : 946.47 N/A Mbits/s 350 Unshaped 10gigE with 4 download streams test: - Summary of tcp_4down run 'MQ + FQ_CODEL': avg median # data pts Ping (ms) ICMP : 0.22 0.23 ms 350 TCP download avg : 2354.08 N/A Mbits/s 350 TCP download sum : 9416.31 N/A Mbits/s 350 TCP download::1 : 2353.65 2352.81 Mbits/s 350 TCP download::2 : 2354.54 2354.21 Mbits/s 350 TCP download::3 : 2353.56 2353.78 Mbits/s 350 TCP download::4 : 2354.56 2354.45 Mbits/s 350 - Summary of tcp_4down run 'MQ + FQ_PIE': avg median # data pts Ping (ms) ICMP : 0.20 0.19 ms 350 TCP download avg : 2354.76 N/A Mbits/s 350 TCP download sum : 9419.04 N/A Mbits/s 350 TCP download::1 : 2354.77 2353.89 Mbits/s 350 TCP download::2 : 2353.41 2354.29 Mbits/s 350 TCP download::3 : 2356.18 2354.19 Mbits/s 350 TCP download::4 : 2354.68 2353.15 Mbits/s 350 - Summary of tcp_4down run 'MQ + DUALPI2': avg median # data pts Ping (ms) ICMP : 0.24 0.24 ms 350 TCP download avg : 2354.11 N/A Mbits/s 350 TCP download sum : 9416.43 N/A Mbits/s 350 TCP download::1 : 2354.75 2353.93 Mbits/s 350 TCP download::2 : 2353.15 2353.75 Mbits/s 350 TCP download::3 : 2353.49 2353.72 Mbits/s 350 TCP download::4 : 2355.04 2353.73 Mbits/s 350 Unshaped 10gigE with 128 download streams test: - Summary of tcp_128down run 'MQ + FQ_CODEL': avg median # data pts Ping (ms) ICMP : 7.57 8.69 ms 350 TCP download avg : 73.97 N/A Mbits/s 350 TCP download sum : 9467.82 N/A Mbits/s 350 - Summary of tcp_128down run 'MQ + FQ_PIE': avg median # data pts Ping (ms) ICMP : 7.82 8.91 ms 350 TCP download avg : 73.97 N/A Mbits/s 350 TCP download sum : 9468.42 N/A Mbits/s 350 - Summary of tcp_128down run 'MQ + DUALPI2': avg median # data pts Ping (ms) ICMP : 6.87 7.93 ms 350 TCP download avg : 73.95 N/A Mbits/s 350 TCP download sum : 9465.87 N/A Mbits/s 350 From the results shown above, we see small differences between combinations. - Update commit message to include results of no_split_gso and split_gso (Dave Taht <dave.taht(a)gmail.com> and Paolo Abeni <pabeni(a)redhat.com>) - Add memlimit in the dualpi2 attribute, and add memory_used, max_memory_used, memory_limit in dualpi2 stats (Dave Taht <dave.taht(a)gmail.com>) - Update note in sch_dualpi2.c related to BBRv3 status (Dave Taht <dave.taht(a)gmail.com>) - Update license identifier (Dave Taht <dave.taht(a)gmail.com>) - Add selftest in tools/testing/selftests/tc-testing (Cong Wang <xiyou.wangcong(a)gmail.com>) - Use netlink policies for parameter checks (Jamal Hadi Salim <jhs(a)mojatatu.com>) - Modify texts & fix typos in Documentation/netlink/specs/tc.yaml (Dave Taht <dave.taht(a)gmail.com>) - Add descriptions of packet counter statistics and the reset function of sch_dualpi2.c - Fix step_thresh in packets - Update code comments in sch_dualpi2.c v4 (22-Oct-2024) - Update statement in Kconfig for DualPI2 (Stephen Hemminger <stephen(a)networkplumber.org>) - Put a blank line after #define in sch_dualpi2.c (Stephen Hemminger <stephen(a)networkplumber.org>) - Fix line length warning. v3 (19-Oct-2024) - Fix compilaiton error - Update Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>) v2 (18-Oct-2024) - Add Documentation/netlink/specs/tc.yaml (Jakub Kicinski <kuba(a)kernel.org>) - Use dualpi2 instead of skb prefix (Jamal Hadi Salim <jhs(a)mojatatu.com>) - Replace nla_parse_nested_deprecated with nla_parse_nested (Jamal Hadi Salim <jhs(a)mojatatu.com>) - Fix line length warning For more details of DualPI2, please refer IETF RFC9332 (https://datatracker.ietf.org/doc/html/rfc9332). Best regards, Chia-Yu Chia-Yu Chang (4): sched: Struct definition and parsing of dualpi2 qdisc sched: Dump configuration and statistics of dualpi2 qdisc selftests/tc-testing: Add selftests for qdisc DualPI2 Documentation: netlink: specs: tc: Add DualPI2 specification Koen De Schepper (1): sched: Add enqueue/dequeue of dualpi2 qdisc Documentation/netlink/specs/tc.yaml | 156 +++ include/net/dropreason-core.h | 6 + include/uapi/linux/pkt_sched.h | 68 + net/sched/Kconfig | 12 + net/sched/Makefile | 1 + net/sched/sch_dualpi2.c | 1106 +++++++++++++++++ tools/testing/selftests/tc-testing/config | 1 + .../tc-testing/tc-tests/qdiscs/dualpi2.json | 254 ++++ tools/testing/selftests/tc-testing/tdc.sh | 1 + 9 files changed, 1605 insertions(+) create mode 100644 net/sched/sch_dualpi2.c create mode 100644 tools/testing/selftests/tc-testing/tc-tests/qdiscs/dualpi2.json -- 2.34.1

5 months, 2 weeks

2
9
0 0

[PATCH] selftests/memfd: clean Makefile

by Chen Linxuan

When writing a test for fusectl, I referred to this Makefile as a reference for creating a FUSE daemon in the selftests. While doing so, I noticed that there is a minor issue in the Makefile. The fuse_mnt.c file is not actually compiled into fuse_mnt.o, and the code setting CFLAGS for it never takes effect. The reason fuse_mnt compiles successfully is because CFLAGS is set at the very beginning of the file. Signed-off-by: Chen Linxuan <chenlinxuan(a)uniontech.com> --- tools/testing/selftests/memfd/Makefile | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/tools/testing/selftests/memfd/Makefile b/tools/testing/selftests/memfd/Makefile index 163b6f68631c4..e9b886c65153d 100644 --- a/tools/testing/selftests/memfd/Makefile +++ b/tools/testing/selftests/memfd/Makefile @@ -1,5 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 -CFLAGS += -D_FILE_OFFSET_BITS=64 CFLAGS += $(KHDR_INCLUDES) TEST_GEN_PROGS := memfd_test @@ -16,10 +15,9 @@ ifeq ($(VAR_LDLIBS),) VAR_LDLIBS := -lfuse -pthread endif -fuse_mnt.o: CFLAGS += $(VAR_CFLAGS) - include ../lib.mk +$(OUTPUT)/fuse_mnt: CFLAGS += $(VAR_CFLAGS) $(OUTPUT)/fuse_mnt: LDLIBS += $(VAR_LDLIBS) $(OUTPUT)/memfd_test: memfd_test.c common.c -- 2.43.0

5 months, 2 weeks

1
0
0 0

[PATCH bpf-next v6 0/5] Replace CONFIG_DMABUF_SYSFS_STATS with BPF

by T.J. Mercier

Until CONFIG_DMABUF_SYSFS_STATS was added [1] it was only possible to perform per-buffer accounting with debugfs which is not suitable for production environments. Eventually we discovered the overhead with per-buffer sysfs file creation/removal was significantly impacting allocation and free times, and exacerbated kernfs lock contention. [2] dma_buf_stats_setup() is responsible for 39% of single-page buffer creation duration, or 74% of single-page dma_buf_export() duration when stressing dmabuf allocations and frees. I prototyped a change from per-buffer to per-exporter statistics with a RCU protected list of exporter allocations that accommodates most (but not all) of our use-cases and avoids almost all of the sysfs overhead. While that adds less overhead than per-buffer sysfs, and less even than the maintenance of the dmabuf debugfs_list, it's still *additional* overhead on top of the debugfs_list and doesn't give us per-buffer info. This series uses the existing dmabuf debugfs_list to implement a BPF dmabuf iterator, which adds no overhead to buffer allocation/free and provides per-buffer info. The list has been moved outside of CONFIG_DEBUG_FS scope so that it is always populated. The BPF program loaded by userspace that extracts per-buffer information gets to define its own interface which avoids the lack of ABI stability with debugfs. This will allow us to replace our use of CONFIG_DMABUF_SYSFS_STATS, and the plan is to remove it from the kernel after the next longterm stable release. [1] https://lore.kernel.org/linux-media/20201210044400.1080308-1-hridya@google.… [2] https://lore.kernel.org/all/20220516171315.2400578-1-tjmercier@google.com v1: https://lore.kernel.org/all/20250414225227.3642618-1-tjmercier@google.com v1 -> v2: Make the DMA buffer list independent of CONFIG_DEBUG_FS per Christian König Add CONFIG_DMA_SHARED_BUFFER check to kernel/bpf/Makefile per kernel test robot Use BTF_ID_LIST_SINGLE instead of BTF_ID_LIST_GLOBAL_SINGLE per Song Liu Fixup comment style, mixing code/declarations, and use ASSERT_OK_FD in selftest per Song Liu Add BPF_ITER_RESCHED feature to bpf_dmabuf_reg_info per Alexei Starovoitov Add open-coded iterator and selftest per Alexei Starovoitov Add a second test buffer from the system dmabuf heap to selftests Use the BPF program we'll use in production for selftest per Alexei Starovoitov https://r.android.com/c/platform/system/bpfprogs/+/3616123/2/dmabufIter.c https://r.android.com/c/platform/system/memory/libmeminfo/+/3614259/1/libdm… v2: https://lore.kernel.org/all/20250504224149.1033867-1-tjmercier@google.com v2 -> v3: Rebase onto bpf-next/master Move get_next_dmabuf() into drivers/dma-buf/dma-buf.c, along with the new get_first_dmabuf(). This avoids having to expose the dmabuf list and mutex to the rest of the kernel, and keeps the dmabuf mutex operations near each other in the same file. (Christian König) Add Christian's RB to dma-buf: Rename debugfs symbols Drop RFC: dma-buf: Remove DMA-BUF statistics v3: https://lore.kernel.org/all/20250507001036.2278781-1-tjmercier@google.com v3 -> v4: Fix selftest BPF program comment style (not kdoc) per Alexei Starovoitov Fix dma-buf.c kdoc comment style per Alexei Starovoitov Rename get_first_dmabuf / get_next_dmabuf to dma_buf_iter_begin / dma_buf_iter_next per Christian König Add Christian's RB to bpf: Add dmabuf iterator v4: https://lore.kernel.org/all/20250508182025.2961555-1-tjmercier@google.com v4 -> v5: Add Christian's Acks to all patches Add Song Liu's Acks Move BTF_ID_LIST_SINGLE and DEFINE_BPF_ITER_FUNC closer to usage per Song Liu Fix open-coded iterator comment style per Song Liu Move iterator termination check to its own subtest per Song Liu Rework selftest buffer creation per Song Liu Fix spacing in sanitize_string per BPF CI v5: https://lore.kernel.org/all/20250512174036.266796-1-tjmercier@google.com v5 -> v6: Song Liu: Init test buffer FDs to -1 Zero-init udmabuf_create for future proofing Bail early for iterator fd/FILE creation failure Dereference char ptr to check for NUL in sanitize_string() Move map insertion from create_test_buffers() to test_dmabuf_iter() Add ACK to selftests/bpf: Add test for open coded dmabuf_iter T.J. Mercier (5): dma-buf: Rename debugfs symbols bpf: Add dmabuf iterator bpf: Add open coded dmabuf iterator selftests/bpf: Add test for dmabuf_iter selftests/bpf: Add test for open coded dmabuf_iter drivers/dma-buf/dma-buf.c | 98 ++++-- include/linux/dma-buf.h | 4 +- kernel/bpf/Makefile | 3 + kernel/bpf/dmabuf_iter.c | 150 +++++++++ kernel/bpf/helpers.c | 5 + .../testing/selftests/bpf/bpf_experimental.h | 5 + tools/testing/selftests/bpf/config | 3 + .../selftests/bpf/prog_tests/dmabuf_iter.c | 285 ++++++++++++++++++ .../testing/selftests/bpf/progs/dmabuf_iter.c | 91 ++++++ 9 files changed, 622 insertions(+), 22 deletions(-) create mode 100644 kernel/bpf/dmabuf_iter.c create mode 100644 tools/testing/selftests/bpf/prog_tests/dmabuf_iter.c create mode 100644 tools/testing/selftests/bpf/progs/dmabuf_iter.c base-commit: 43745d11bfd9683abdf08ad7a5cc403d6a9ffd15 -- 2.49.0.1045.g170613ef41-goog

5 months, 2 weeks

2
9
0 0

[PATCH v6 net-next 00/15] AccECN protocol patch series

by chia-yu.chang＠nokia-bell-labs.com

From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com> Hello, Please find the v6: v5 (09-May-2025) - Add #3 to utilize exisintg holes of tcp_sock_write_txrx group for later patches (#4, #9, #10) with new u8 members (Paolo Abeni <pabeni(a)redhat.com>) - Add pahole outcomes before and after commit in #4, #5, #6, #9, #10, #15 (Paolo Abeni <pabeni(a)redhat.com>) - Define new helper function tcp_send_ack_reflect_ect() for sending ACK with reflected ECT in #5 (Paolo Abeni <pabeni(a)redhat.com>) - Add comments for function tcp_ecn_rcv_synack() in #5 (Paolo Abeni <pabeni(a)redhat.com>) - Add enum/define to be used by sysctl_tcp_ecn in #5, sysctl_tcp_ecn_option in #9, and sysctl_tcp_ecn_option_beacon in #10 (Paolo Abeni <pabeni(a)redhat.com>) - Move accecn_fail_mode and saw_accecn_opt in #5 and #11 to use exisintg holes of tcp_sock (Paolo Abeni <pabeni(a)redhat.com>) - Change data type of new members of tcp_request_sock and move them to the end of struct in #5 and #11 (Paolo Abeni <pabeni(a)redhat.com>) - Move new members of tcp_info to the end of struct in #6 (Paolo Abeni <pabeni(a)redhat.com>) - Merge previous #7 into #9 (Paolo Abeni <pabeni(a)redhat.com>) - Mask ecnfield with INET_ECN_MASK to remove WARN_ONCE in #9 (Paolo Abeni <pabeni(a)redhat.com>) - Reduce the indentation levels for reabability in #9 and #10 (Paolo Abeni <pabeni(a)redhat.com>) - Move delivered_ecn_bytes to the RX group in #9, accecn_opt_tstamp to the TX group in #10, pkts_acked_ewma to the RX group in #15 (Paolo Abeni <pabeni(a)redhat.com>) - Add changes in Documentation/networking/net_cachelines/tcp_sock.rst for new tcp_sock members in #3, #5, #6, #9, #10, #15 v5 (22-Apr-2025) - Further fix for 32-bit ARM alignment in tcp.c (Simon Horman <horms(a)kernel.org>) v4 (18-Apr-2025) - Fix 32-bit ARM assertion for alignment requirement (Simon Horman <horms(a)kernel.org>) v3 (14-Apr-2025) - Fix patch apply issue in v2 (Jakub Kicinski <kuba(a)kernel.org>) v2 (18-Mar-2025) - Add one missing patch from the previous AccECN protocol preparation patch series to this patch series. The full patch series can be found in https://github.com/L4STeam/linux-net-next/commits/upstream_l4steam/ The Accurate ECN draft can be found in https://datatracker.ietf.org/doc/html/draft-ietf-tcpm-accurate-ecn-28 Best regards, Chia-Yu Chia-Yu Chang (2): tcp: reorganize tcp_sock_write_txrx group for variables later tcp: accecn: AccECN option failure handling Ilpo Järvinen (13): tcp: reorganize SYN ECN code tcp: fast path functions later tcp: AccECN core tcp: accecn: AccECN negotiation tcp: accecn: add AccECN rx byte counters tcp: accecn: AccECN needs to know delivered bytes tcp: sack option handling improvements tcp: accecn: AccECN option tcp: accecn: AccECN option send control tcp: accecn: AccECN option ceb/cep heuristic tcp: accecn: AccECN ACE field multi-wrap heuristic tcp: accecn: try to fit AccECN option with SACK tcp: try to avoid safer when ACKs are thinned .../networking/net_cachelines/tcp_sock.rst | 14 + include/linux/tcp.h | 34 +- include/net/netns/ipv4.h | 2 + include/net/tcp.h | 221 ++++++- include/uapi/linux/tcp.h | 7 + net/ipv4/syncookies.c | 3 + net/ipv4/sysctl_net_ipv4.c | 19 + net/ipv4/tcp.c | 30 +- net/ipv4/tcp_input.c | 608 +++++++++++++++++- net/ipv4/tcp_ipv4.c | 7 +- net/ipv4/tcp_minisocks.c | 92 ++- net/ipv4/tcp_output.c | 297 ++++++++- net/ipv6/syncookies.c | 1 + net/ipv6/tcp_ipv6.c | 1 + 14 files changed, 1237 insertions(+), 99 deletions(-) -- 2.34.1

5 months, 2 weeks

3
17
0 0

[PATCH v2] selftests: riscv: add misaligned access testing

by Clément Léger

This selftest tests all the currently emulated instructions (except for the RV32 compressed ones which are left as a future exercise for a RV32 user). For the FPU instructions, all the FPU registers are tested. Signed-off-by: Clément Léger <cleger(a)rivosinc.com> --- Note: This test can be executed with the FWFT series [1] or using an SBI firmware that delegates misaligned traps by default. If using QEMU, you will need the patches mentionned at [2] so that misaligned accesses will generate a trap. Note: This commit was part of a series [3] that was partially merged. Link: https://lore.kernel.org/all/20250424173204.1948385-1-cleger@rivosinc.com/ [1] Link: https://lore.kernel.org/all/20241211211933.198792-1-fkonrad@amd.com/ [2] Link: https://lore.kernel.org/linux-riscv/20250422162324.956065-1-cleger@rivosinc… [3] V2: - Fix commit description - FIx a few errors reported by checkpatch.pl --- tools/testing/selftests/riscv/Makefile | 2 +- .../selftests/riscv/misaligned/.gitignore | 1 + .../selftests/riscv/misaligned/Makefile | 12 + .../selftests/riscv/misaligned/common.S | 33 +++ .../testing/selftests/riscv/misaligned/fpu.S | 180 +++++++++++++ tools/testing/selftests/riscv/misaligned/gp.S | 103 +++++++ .../selftests/riscv/misaligned/misaligned.c | 254 ++++++++++++++++++ 7 files changed, 584 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/riscv/misaligned/.gitignore create mode 100644 tools/testing/selftests/riscv/misaligned/Makefile create mode 100644 tools/testing/selftests/riscv/misaligned/common.S create mode 100644 tools/testing/selftests/riscv/misaligned/fpu.S create mode 100644 tools/testing/selftests/riscv/misaligned/gp.S create mode 100644 tools/testing/selftests/riscv/misaligned/misaligned.c diff --git a/tools/testing/selftests/riscv/Makefile b/tools/testing/selftests/riscv/Makefile index 099b8c1f46f8..95a98ceeb3b3 100644 --- a/tools/testing/selftests/riscv/Makefile +++ b/tools/testing/selftests/riscv/Makefile @@ -5,7 +5,7 @@ ARCH ?= $(shell uname -m 2>/dev/null || echo not) ifneq (,$(filter $(ARCH),riscv)) -RISCV_SUBTARGETS ?= abi hwprobe mm sigreturn vector +RISCV_SUBTARGETS ?= abi hwprobe mm sigreturn vector misaligned else RISCV_SUBTARGETS := endif diff --git a/tools/testing/selftests/riscv/misaligned/.gitignore b/tools/testing/selftests/riscv/misaligned/.gitignore new file mode 100644 index 000000000000..5eff15a1f981 --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/.gitignore @@ -0,0 +1 @@ +misaligned diff --git a/tools/testing/selftests/riscv/misaligned/Makefile b/tools/testing/selftests/riscv/misaligned/Makefile new file mode 100644 index 000000000000..1aa40110c50d --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/Makefile @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2021 ARM Limited +# Originally tools/testing/arm64/abi/Makefile + +CFLAGS += -I$(top_srcdir)/tools/include + +TEST_GEN_PROGS := misaligned + +include ../../lib.mk + +$(OUTPUT)/misaligned: misaligned.c fpu.S gp.S + $(CC) -g3 -static -o$@ -march=rv64imafdc $(CFLAGS) $(LDFLAGS) $^ diff --git a/tools/testing/selftests/riscv/misaligned/common.S b/tools/testing/selftests/riscv/misaligned/common.S new file mode 100644 index 000000000000..8fa00035bd5d --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/common.S @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2025 Rivos Inc. + * + * Authors: + * Clément Léger <cleger(a)rivosinc.com> + */ + +.macro lb_sb temp, offset, src, dst + lb \temp, \offset(\src) + sb \temp, \offset(\dst) +.endm + +.macro copy_long_to temp, src, dst + lb_sb \temp, 0, \src, \dst, + lb_sb \temp, 1, \src, \dst, + lb_sb \temp, 2, \src, \dst, + lb_sb \temp, 3, \src, \dst, + lb_sb \temp, 4, \src, \dst, + lb_sb \temp, 5, \src, \dst, + lb_sb \temp, 6, \src, \dst, + lb_sb \temp, 7, \src, \dst, +.endm + +.macro sp_stack_prologue offset + addi sp, sp, -8 + sub sp, sp, \offset +.endm + +.macro sp_stack_epilogue offset + add sp, sp, \offset + addi sp, sp, 8 +.endm diff --git a/tools/testing/selftests/riscv/misaligned/fpu.S b/tools/testing/selftests/riscv/misaligned/fpu.S new file mode 100644 index 000000000000..d008bff58310 --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/fpu.S @@ -0,0 +1,180 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2025 Rivos Inc. + * + * Authors: + * Clément Léger <cleger(a)rivosinc.com> + */ + +#include "common.S" + +#define CASE_ALIGN 4 + +.macro fpu_load_inst fpreg, inst, precision, load_reg +.align CASE_ALIGN + \inst \fpreg, 0(\load_reg) + fmv.\precision fa0, \fpreg + j 2f +.endm + +#define flw(__fpreg) fpu_load_inst __fpreg, flw, s, s1 +#define fld(__fpreg) fpu_load_inst __fpreg, fld, d, s1 +#define c_flw(__fpreg) fpu_load_inst __fpreg, c.flw, s, s1 +#define c_fld(__fpreg) fpu_load_inst __fpreg, c.fld, d, s1 +#define c_fldsp(__fpreg) fpu_load_inst __fpreg, c.fldsp, d, sp + +.macro fpu_store_inst fpreg, inst, precision, store_reg +.align CASE_ALIGN + fmv.\precision \fpreg, fa0 + \inst \fpreg, 0(\store_reg) + j 2f +.endm + +#define fsw(__fpreg) fpu_store_inst __fpreg, fsw, s, s1 +#define fsd(__fpreg) fpu_store_inst __fpreg, fsd, d, s1 +#define c_fsw(__fpreg) fpu_store_inst __fpreg, c.fsw, s, s1 +#define c_fsd(__fpreg) fpu_store_inst __fpreg, c.fsd, d, s1 +#define c_fsdsp(__fpreg) fpu_store_inst __fpreg, c.fsdsp, d, sp + +.macro fp_test_prologue + move s1, a1 + /* + * Compute jump offset to store the correct FP register since we don't + * have indirect FP register access (or at least we don't use this + * extension so that works on all archs) + */ + sll t0, a0, CASE_ALIGN + la t2, 1f + add t0, t0, t2 + jr t0 +.align CASE_ALIGN +1: +.endm + +.macro fp_test_prologue_compressed + /* FP registers for compressed instructions starts from 8 to 16 */ + addi a0, a0, -8 + fp_test_prologue +.endm + +#define fp_test_body_compressed(__inst_func) \ + __inst_func(f8); \ + __inst_func(f9); \ + __inst_func(f10); \ + __inst_func(f11); \ + __inst_func(f12); \ + __inst_func(f13); \ + __inst_func(f14); \ + __inst_func(f15); \ +2: + +#define fp_test_body(__inst_func) \ + __inst_func(f0); \ + __inst_func(f1); \ + __inst_func(f2); \ + __inst_func(f3); \ + __inst_func(f4); \ + __inst_func(f5); \ + __inst_func(f6); \ + __inst_func(f7); \ + __inst_func(f8); \ + __inst_func(f9); \ + __inst_func(f10); \ + __inst_func(f11); \ + __inst_func(f12); \ + __inst_func(f13); \ + __inst_func(f14); \ + __inst_func(f15); \ + __inst_func(f16); \ + __inst_func(f17); \ + __inst_func(f18); \ + __inst_func(f19); \ + __inst_func(f20); \ + __inst_func(f21); \ + __inst_func(f22); \ + __inst_func(f23); \ + __inst_func(f24); \ + __inst_func(f25); \ + __inst_func(f26); \ + __inst_func(f27); \ + __inst_func(f28); \ + __inst_func(f29); \ + __inst_func(f30); \ + __inst_func(f31); \ +2: +.text + +#define __gen_test_inst(__inst, __suffix) \ +.global test_ ## __inst; \ +test_ ## __inst:; \ + fp_test_prologue ## __suffix; \ + fp_test_body ## __suffix(__inst); \ + ret + +#define gen_test_inst_compressed(__inst) \ + .option arch,+c; \ + __gen_test_inst(c_ ## __inst, _compressed) + +#define gen_test_inst(__inst) \ + .balign 16; \ + .option push; \ + .option arch,-c; \ + __gen_test_inst(__inst, ); \ + .option pop + +.macro fp_test_prologue_load_compressed_sp + copy_long_to t0, a1, sp +.endm + +.macro fp_test_epilogue_load_compressed_sp +.endm + +.macro fp_test_prologue_store_compressed_sp +.endm + +.macro fp_test_epilogue_store_compressed_sp + copy_long_to t0, sp, a1 +.endm + +#define gen_inst_compressed_sp(__inst, __type) \ + .global test_c_ ## __inst ## sp; \ + test_c_ ## __inst ## sp:; \ + sp_stack_prologue a2; \ + fp_test_prologue_## __type ## _compressed_sp; \ + fp_test_prologue_compressed; \ + fp_test_body_compressed(c_ ## __inst ## sp); \ + fp_test_epilogue_## __type ## _compressed_sp; \ + sp_stack_epilogue a2; \ + ret + +#define gen_test_load_compressed_sp(__inst) gen_inst_compressed_sp(__inst, load) +#define gen_test_store_compressed_sp(__inst) gen_inst_compressed_sp(__inst, store) + +/* + * float_fsw_reg - Set a FP register from a register containing the value + * a0 = FP register index to be set + * a1 = addr where to store register value + * a2 = address offset + * a3 = value to be store + */ +gen_test_inst(fsw) + +/* + * float_flw_reg - Get a FP register value and return it + * a0 = FP register index to be retrieved + * a1 = addr to load register from + * a2 = address offset + */ +gen_test_inst(flw) + +gen_test_inst(fsd) +#ifdef __riscv_compressed +gen_test_inst_compressed(fsd) +gen_test_store_compressed_sp(fsd) +#endif + +gen_test_inst(fld) +#ifdef __riscv_compressed +gen_test_inst_compressed(fld) +gen_test_load_compressed_sp(fld) +#endif diff --git a/tools/testing/selftests/riscv/misaligned/gp.S b/tools/testing/selftests/riscv/misaligned/gp.S new file mode 100644 index 000000000000..f53f4c6d81dd --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/gp.S @@ -0,0 +1,103 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2025 Rivos Inc. + * + * Authors: + * Clément Léger <cleger(a)rivosinc.com> + */ + +#include "common.S" + +.text + +.macro __gen_test_inst inst, src_reg + \inst a2, 0(\src_reg) + move a0, a2 +.endm + +.macro gen_func_header func_name, rvc + .option arch,\rvc + .global test_\func_name + test_\func_name: +.endm + +.macro gen_test_inst inst + .option push + gen_func_header \inst, -c + __gen_test_inst \inst, a0 + .option pop + ret +.endm + +.macro __gen_test_inst_c name, src_reg + .option push + gen_func_header c_\name, +c + __gen_test_inst c.\name, \src_reg + .option pop + ret +.endm + +.macro gen_test_inst_c name + __gen_test_inst_c \name, a0 +.endm + + +.macro gen_test_inst_load_c_sp name + .option push + gen_func_header c_\name\()sp, +c + sp_stack_prologue a1 + copy_long_to t0, a0, sp + c.ldsp a0, 0(sp) + sp_stack_epilogue a1 + .option pop + ret +.endm + +.macro lb_sp_sb_a0 reg, offset + lb_sb \reg, \offset, sp, a0 +.endm + +.macro gen_test_inst_store_c_sp inst_name + .option push + gen_func_header c_\inst_name\()sp, +c + /* Misalign stack pointer */ + sp_stack_prologue a1 + /* Misalign access */ + c.sdsp a2, 0(sp) + copy_long_to t0, sp, a0 + sp_stack_epilogue a1 + .option pop + ret +.endm + + + /* + * a0 = addr to load from + * a1 = address offset + * a2 = value to be loaded + */ +gen_test_inst lh +gen_test_inst lhu +gen_test_inst lw +gen_test_inst lwu +gen_test_inst ld +#ifdef __riscv_compressed +gen_test_inst_c lw +gen_test_inst_c ld +gen_test_inst_load_c_sp ld +#endif + +/* + * a0 = addr where to store value + * a1 = address offset + * a2 = value to be stored + */ +gen_test_inst sh +gen_test_inst sw +gen_test_inst sd +#ifdef __riscv_compressed +gen_test_inst_c sw +gen_test_inst_c sd +gen_test_inst_store_c_sp sd +#endif + diff --git a/tools/testing/selftests/riscv/misaligned/misaligned.c b/tools/testing/selftests/riscv/misaligned/misaligned.c new file mode 100644 index 000000000000..11def5f67dd9 --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/misaligned.c @@ -0,0 +1,254 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2025 Rivos Inc. + * + * Authors: + * Clément Léger <cleger(a)rivosinc.com> + */ +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <linux/ptrace.h> +#include "../../kselftest_harness.h" + +#include <stdlib.h> +#include <stdio.h> +#include <stdint.h> +#include <float.h> +#include <errno.h> +#include <math.h> +#include <string.h> +#include <signal.h> +#include <stdbool.h> +#include <unistd.h> +#include <inttypes.h> +#include <ucontext.h> + +#include <sys/prctl.h> + +#define stringify(s) __stringify(s) +#define __stringify(s) #s + +#define VAL16 0x1234 +#define VAL32 0xDEADBEEF +#define VAL64 0x45674321D00DF789 + +#define VAL_float 78951.234375 +#define VAL_double 567890.512396965789589290 + +static bool float_equal(float a, float b) +{ + float scaled_epsilon; + float difference = fabsf(a - b); + + // Scale to the largest value. + a = fabsf(a); + b = fabsf(b); + if (a > b) + scaled_epsilon = FLT_EPSILON * a; + else + scaled_epsilon = FLT_EPSILON * b; + + return difference <= scaled_epsilon; +} + +static bool double_equal(double a, double b) +{ + double scaled_epsilon; + double difference = fabsf(a - b); + + // Scale to the largest value. + a = fabs(a); + b = fabs(b); + if (a > b) + scaled_epsilon = DBL_EPSILON * a; + else + scaled_epsilon = DBL_EPSILON * b; + + return difference <= scaled_epsilon; +} + +#define fpu_load_proto(__inst, __type) \ +extern __type test_ ## __inst(unsigned long fp_reg, void *addr, unsigned long offset, __type value) + +fpu_load_proto(flw, float); +fpu_load_proto(fld, double); +fpu_load_proto(c_flw, float); +fpu_load_proto(c_fld, double); +fpu_load_proto(c_fldsp, double); + +#define fpu_store_proto(__inst, __type) \ +extern void test_ ## __inst(unsigned long fp_reg, void *addr, unsigned long offset, __type value) + +fpu_store_proto(fsw, float); +fpu_store_proto(fsd, double); +fpu_store_proto(c_fsw, float); +fpu_store_proto(c_fsd, double); +fpu_store_proto(c_fsdsp, double); + +#define gp_load_proto(__inst, __type) \ +extern __type test_ ## __inst(void *addr, unsigned long offset, __type value) + +gp_load_proto(lh, uint16_t); +gp_load_proto(lhu, uint16_t); +gp_load_proto(lw, uint32_t); +gp_load_proto(lwu, uint32_t); +gp_load_proto(ld, uint64_t); +gp_load_proto(c_lw, uint32_t); +gp_load_proto(c_ld, uint64_t); +gp_load_proto(c_ldsp, uint64_t); + +#define gp_store_proto(__inst, __type) \ +extern void test_ ## __inst(void *addr, unsigned long offset, __type value) + +gp_store_proto(sh, uint16_t); +gp_store_proto(sw, uint32_t); +gp_store_proto(sd, uint64_t); +gp_store_proto(c_sw, uint32_t); +gp_store_proto(c_sd, uint64_t); +gp_store_proto(c_sdsp, uint64_t); + +#define TEST_GP_LOAD(__inst, __type_size) \ +TEST(gp_load_ ## __inst) \ +{ \ + int offset, ret; \ + uint8_t buf[16] __attribute__((aligned(16))); \ + \ + ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \ + ASSERT_EQ(ret, 0); \ + \ + for (offset = 1; offset < (__type_size) / 8; offset++) { \ + uint ## __type_size ## _t val = VAL ## __type_size; \ + uint ## __type_size ## _t *ptr = (uint ## __type_size ## _t *)(buf + offset); \ + memcpy(ptr, &val, sizeof(val)); \ + val = test_ ## __inst(ptr, offset, val); \ + EXPECT_EQ(VAL ## __type_size, val); \ + } \ +} + +TEST_GP_LOAD(lh, 16); +TEST_GP_LOAD(lhu, 16); +TEST_GP_LOAD(lw, 32); +TEST_GP_LOAD(lwu, 32); +TEST_GP_LOAD(ld, 64); +#ifdef __riscv_compressed +TEST_GP_LOAD(c_lw, 32); +TEST_GP_LOAD(c_ld, 64); +TEST_GP_LOAD(c_ldsp, 64); +#endif + +#define TEST_GP_STORE(__inst, __type_size) \ +TEST(gp_load_ ## __inst) \ +{ \ + int offset, ret; \ + uint8_t buf[16] __attribute__((aligned(16))); \ + \ + ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \ + ASSERT_EQ(ret, 0); \ + \ + for (offset = 1; offset < (__type_size) / 8; offset++) { \ + uint ## __type_size ## _t val = VAL ## __type_size; \ + uint ## __type_size ## _t *ptr = (uint ## __type_size ## _t *)(buf + offset); \ + memset(ptr, 0, sizeof(val)); \ + test_ ## __inst(ptr, offset, val); \ + memcpy(&val, ptr, sizeof(val)); \ + EXPECT_EQ(VAL ## __type_size, val); \ + } \ +} +TEST_GP_STORE(sh, 16); +TEST_GP_STORE(sw, 32); +TEST_GP_STORE(sd, 64); +#ifdef __riscv_compressed +TEST_GP_STORE(c_sw, 32); +TEST_GP_STORE(c_sd, 64); +TEST_GP_STORE(c_sdsp, 64); +#endif + +#define __TEST_FPU_LOAD(__type, __inst, __reg_start, __reg_end) \ +TEST(fpu_load_ ## __inst) \ +{ \ + int ret, offset, fp_reg; \ + uint8_t buf[16] __attribute__((aligned(16))); \ + \ + ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \ + ASSERT_EQ(ret, 0); \ + \ + for (fp_reg = __reg_start; fp_reg < __reg_end; fp_reg++) { \ + for (offset = 1; offset < 4; offset++) { \ + void *load_addr = (buf + offset); \ + __type val = VAL_ ## __type ; \ + \ + memcpy(load_addr, &val, sizeof(val)); \ + val = test_ ## __inst(fp_reg, load_addr, offset, val); \ + EXPECT_TRUE(__type ##_equal(val, VAL_## __type)); \ + } \ + } \ +} +#define TEST_FPU_LOAD(__type, __inst) \ + __TEST_FPU_LOAD(__type, __inst, 0, 32) +#define TEST_FPU_LOAD_COMPRESSED(__type, __inst) \ + __TEST_FPU_LOAD(__type, __inst, 8, 16) + +TEST_FPU_LOAD(float, flw) +TEST_FPU_LOAD(double, fld) +#ifdef __riscv_compressed +TEST_FPU_LOAD_COMPRESSED(double, c_fld) +TEST_FPU_LOAD_COMPRESSED(double, c_fldsp) +#endif + +#define __TEST_FPU_STORE(__type, __inst, __reg_start, __reg_end) \ +TEST(fpu_store_ ## __inst) \ +{ \ + int ret, offset, fp_reg; \ + uint8_t buf[16] __attribute__((aligned(16))); \ + \ + ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \ + ASSERT_EQ(ret, 0); \ + \ + for (fp_reg = __reg_start; fp_reg < __reg_end; fp_reg++) { \ + for (offset = 1; offset < 4; offset++) { \ + \ + void *store_addr = (buf + offset); \ + __type val = VAL_ ## __type ; \ + \ + test_ ## __inst(fp_reg, store_addr, offset, val); \ + memcpy(&val, store_addr, sizeof(val)); \ + EXPECT_TRUE(__type ## _equal(val, VAL_## __type)); \ + } \ + } \ +} +#define TEST_FPU_STORE(__type, __inst) \ + __TEST_FPU_STORE(__type, __inst, 0, 32) +#define TEST_FPU_STORE_COMPRESSED(__type, __inst) \ + __TEST_FPU_STORE(__type, __inst, 8, 16) + +TEST_FPU_STORE(float, fsw) +TEST_FPU_STORE(double, fsd) +#ifdef __riscv_compressed +TEST_FPU_STORE_COMPRESSED(double, c_fsd) +TEST_FPU_STORE_COMPRESSED(double, c_fsdsp) +#endif + +TEST_SIGNAL(gen_sigbus, SIGBUS) +{ + uint32_t *ptr; + uint8_t buf[16] __attribute__((aligned(16))); + int ret; + + ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_SIGBUS); + ASSERT_EQ(ret, 0); + + ptr = (uint32_t *)(buf + 1); + *ptr = 0xDEADBEEFULL; +} + +int main(int argc, char **argv) +{ + int ret, val; + + ret = prctl(PR_GET_UNALIGN, &val); + if (ret == -1 && errno == EINVAL) + ksft_exit_skip("SKIP GET_UNALIGN_CTL not supported\n"); + + exit(test_harness_run(argc, argv)); +} -- 2.49.0

5 months, 2 weeks

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[PATCH] selftests: riscv: add misaligned access testing

by Clément Léger

This selftest tests all the currently emulated instruction (except for the RV32 compressed ones which are left as a future exercise for a RV32 user). For the FPU instructions, all the FPU registers are tested. This commit can be tested using Signed-off-by: Clément Léger <cleger(a)rivosinc.com> --- Note: this test can be executed with the FWFT series [1] or using an SBI firmware that delegates misaligned traps by default. If using QEMU, you will need the patches mentionned at [2] so that misaligned accesses will generate a trap. Link: https://lore.kernel.org/all/20250424173204.1948385-1-cleger@rivosinc.com/ [1] Link: https://lore.kernel.org/all/20241211211933.198792-1-fkonrad@amd.com/ [2] tools/testing/selftests/riscv/Makefile | 2 +- .../selftests/riscv/misaligned/.gitignore | 1 + .../selftests/riscv/misaligned/Makefile | 12 + .../selftests/riscv/misaligned/common.S | 33 +++ .../testing/selftests/riscv/misaligned/fpu.S | 180 +++++++++++++ tools/testing/selftests/riscv/misaligned/gp.S | 103 +++++++ .../selftests/riscv/misaligned/misaligned.c | 254 ++++++++++++++++++ 7 files changed, 584 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/riscv/misaligned/.gitignore create mode 100644 tools/testing/selftests/riscv/misaligned/Makefile create mode 100644 tools/testing/selftests/riscv/misaligned/common.S create mode 100644 tools/testing/selftests/riscv/misaligned/fpu.S create mode 100644 tools/testing/selftests/riscv/misaligned/gp.S create mode 100644 tools/testing/selftests/riscv/misaligned/misaligned.c diff --git a/tools/testing/selftests/riscv/Makefile b/tools/testing/selftests/riscv/Makefile index 099b8c1f46f8..95a98ceeb3b3 100644 --- a/tools/testing/selftests/riscv/Makefile +++ b/tools/testing/selftests/riscv/Makefile @@ -5,7 +5,7 @@ ARCH ?= $(shell uname -m 2>/dev/null || echo not) ifneq (,$(filter $(ARCH),riscv)) -RISCV_SUBTARGETS ?= abi hwprobe mm sigreturn vector +RISCV_SUBTARGETS ?= abi hwprobe mm sigreturn vector misaligned else RISCV_SUBTARGETS := endif diff --git a/tools/testing/selftests/riscv/misaligned/.gitignore b/tools/testing/selftests/riscv/misaligned/.gitignore new file mode 100644 index 000000000000..5eff15a1f981 --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/.gitignore @@ -0,0 +1 @@ +misaligned diff --git a/tools/testing/selftests/riscv/misaligned/Makefile b/tools/testing/selftests/riscv/misaligned/Makefile new file mode 100644 index 000000000000..1aa40110c50d --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/Makefile @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2021 ARM Limited +# Originally tools/testing/arm64/abi/Makefile + +CFLAGS += -I$(top_srcdir)/tools/include + +TEST_GEN_PROGS := misaligned + +include ../../lib.mk + +$(OUTPUT)/misaligned: misaligned.c fpu.S gp.S + $(CC) -g3 -static -o$@ -march=rv64imafdc $(CFLAGS) $(LDFLAGS) $^ diff --git a/tools/testing/selftests/riscv/misaligned/common.S b/tools/testing/selftests/riscv/misaligned/common.S new file mode 100644 index 000000000000..8fa00035bd5d --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/common.S @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2025 Rivos Inc. + * + * Authors: + * Clément Léger <cleger(a)rivosinc.com> + */ + +.macro lb_sb temp, offset, src, dst + lb \temp, \offset(\src) + sb \temp, \offset(\dst) +.endm + +.macro copy_long_to temp, src, dst + lb_sb \temp, 0, \src, \dst, + lb_sb \temp, 1, \src, \dst, + lb_sb \temp, 2, \src, \dst, + lb_sb \temp, 3, \src, \dst, + lb_sb \temp, 4, \src, \dst, + lb_sb \temp, 5, \src, \dst, + lb_sb \temp, 6, \src, \dst, + lb_sb \temp, 7, \src, \dst, +.endm + +.macro sp_stack_prologue offset + addi sp, sp, -8 + sub sp, sp, \offset +.endm + +.macro sp_stack_epilogue offset + add sp, sp, \offset + addi sp, sp, 8 +.endm diff --git a/tools/testing/selftests/riscv/misaligned/fpu.S b/tools/testing/selftests/riscv/misaligned/fpu.S new file mode 100644 index 000000000000..d008bff58310 --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/fpu.S @@ -0,0 +1,180 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2025 Rivos Inc. + * + * Authors: + * Clément Léger <cleger(a)rivosinc.com> + */ + +#include "common.S" + +#define CASE_ALIGN 4 + +.macro fpu_load_inst fpreg, inst, precision, load_reg +.align CASE_ALIGN + \inst \fpreg, 0(\load_reg) + fmv.\precision fa0, \fpreg + j 2f +.endm + +#define flw(__fpreg) fpu_load_inst __fpreg, flw, s, s1 +#define fld(__fpreg) fpu_load_inst __fpreg, fld, d, s1 +#define c_flw(__fpreg) fpu_load_inst __fpreg, c.flw, s, s1 +#define c_fld(__fpreg) fpu_load_inst __fpreg, c.fld, d, s1 +#define c_fldsp(__fpreg) fpu_load_inst __fpreg, c.fldsp, d, sp + +.macro fpu_store_inst fpreg, inst, precision, store_reg +.align CASE_ALIGN + fmv.\precision \fpreg, fa0 + \inst \fpreg, 0(\store_reg) + j 2f +.endm + +#define fsw(__fpreg) fpu_store_inst __fpreg, fsw, s, s1 +#define fsd(__fpreg) fpu_store_inst __fpreg, fsd, d, s1 +#define c_fsw(__fpreg) fpu_store_inst __fpreg, c.fsw, s, s1 +#define c_fsd(__fpreg) fpu_store_inst __fpreg, c.fsd, d, s1 +#define c_fsdsp(__fpreg) fpu_store_inst __fpreg, c.fsdsp, d, sp + +.macro fp_test_prologue + move s1, a1 + /* + * Compute jump offset to store the correct FP register since we don't + * have indirect FP register access (or at least we don't use this + * extension so that works on all archs) + */ + sll t0, a0, CASE_ALIGN + la t2, 1f + add t0, t0, t2 + jr t0 +.align CASE_ALIGN +1: +.endm + +.macro fp_test_prologue_compressed + /* FP registers for compressed instructions starts from 8 to 16 */ + addi a0, a0, -8 + fp_test_prologue +.endm + +#define fp_test_body_compressed(__inst_func) \ + __inst_func(f8); \ + __inst_func(f9); \ + __inst_func(f10); \ + __inst_func(f11); \ + __inst_func(f12); \ + __inst_func(f13); \ + __inst_func(f14); \ + __inst_func(f15); \ +2: + +#define fp_test_body(__inst_func) \ + __inst_func(f0); \ + __inst_func(f1); \ + __inst_func(f2); \ + __inst_func(f3); \ + __inst_func(f4); \ + __inst_func(f5); \ + __inst_func(f6); \ + __inst_func(f7); \ + __inst_func(f8); \ + __inst_func(f9); \ + __inst_func(f10); \ + __inst_func(f11); \ + __inst_func(f12); \ + __inst_func(f13); \ + __inst_func(f14); \ + __inst_func(f15); \ + __inst_func(f16); \ + __inst_func(f17); \ + __inst_func(f18); \ + __inst_func(f19); \ + __inst_func(f20); \ + __inst_func(f21); \ + __inst_func(f22); \ + __inst_func(f23); \ + __inst_func(f24); \ + __inst_func(f25); \ + __inst_func(f26); \ + __inst_func(f27); \ + __inst_func(f28); \ + __inst_func(f29); \ + __inst_func(f30); \ + __inst_func(f31); \ +2: +.text + +#define __gen_test_inst(__inst, __suffix) \ +.global test_ ## __inst; \ +test_ ## __inst:; \ + fp_test_prologue ## __suffix; \ + fp_test_body ## __suffix(__inst); \ + ret + +#define gen_test_inst_compressed(__inst) \ + .option arch,+c; \ + __gen_test_inst(c_ ## __inst, _compressed) + +#define gen_test_inst(__inst) \ + .balign 16; \ + .option push; \ + .option arch,-c; \ + __gen_test_inst(__inst, ); \ + .option pop + +.macro fp_test_prologue_load_compressed_sp + copy_long_to t0, a1, sp +.endm + +.macro fp_test_epilogue_load_compressed_sp +.endm + +.macro fp_test_prologue_store_compressed_sp +.endm + +.macro fp_test_epilogue_store_compressed_sp + copy_long_to t0, sp, a1 +.endm + +#define gen_inst_compressed_sp(__inst, __type) \ + .global test_c_ ## __inst ## sp; \ + test_c_ ## __inst ## sp:; \ + sp_stack_prologue a2; \ + fp_test_prologue_## __type ## _compressed_sp; \ + fp_test_prologue_compressed; \ + fp_test_body_compressed(c_ ## __inst ## sp); \ + fp_test_epilogue_## __type ## _compressed_sp; \ + sp_stack_epilogue a2; \ + ret + +#define gen_test_load_compressed_sp(__inst) gen_inst_compressed_sp(__inst, load) +#define gen_test_store_compressed_sp(__inst) gen_inst_compressed_sp(__inst, store) + +/* + * float_fsw_reg - Set a FP register from a register containing the value + * a0 = FP register index to be set + * a1 = addr where to store register value + * a2 = address offset + * a3 = value to be store + */ +gen_test_inst(fsw) + +/* + * float_flw_reg - Get a FP register value and return it + * a0 = FP register index to be retrieved + * a1 = addr to load register from + * a2 = address offset + */ +gen_test_inst(flw) + +gen_test_inst(fsd) +#ifdef __riscv_compressed +gen_test_inst_compressed(fsd) +gen_test_store_compressed_sp(fsd) +#endif + +gen_test_inst(fld) +#ifdef __riscv_compressed +gen_test_inst_compressed(fld) +gen_test_load_compressed_sp(fld) +#endif diff --git a/tools/testing/selftests/riscv/misaligned/gp.S b/tools/testing/selftests/riscv/misaligned/gp.S new file mode 100644 index 000000000000..f53f4c6d81dd --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/gp.S @@ -0,0 +1,103 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2025 Rivos Inc. + * + * Authors: + * Clément Léger <cleger(a)rivosinc.com> + */ + +#include "common.S" + +.text + +.macro __gen_test_inst inst, src_reg + \inst a2, 0(\src_reg) + move a0, a2 +.endm + +.macro gen_func_header func_name, rvc + .option arch,\rvc + .global test_\func_name + test_\func_name: +.endm + +.macro gen_test_inst inst + .option push + gen_func_header \inst, -c + __gen_test_inst \inst, a0 + .option pop + ret +.endm + +.macro __gen_test_inst_c name, src_reg + .option push + gen_func_header c_\name, +c + __gen_test_inst c.\name, \src_reg + .option pop + ret +.endm + +.macro gen_test_inst_c name + __gen_test_inst_c \name, a0 +.endm + + +.macro gen_test_inst_load_c_sp name + .option push + gen_func_header c_\name\()sp, +c + sp_stack_prologue a1 + copy_long_to t0, a0, sp + c.ldsp a0, 0(sp) + sp_stack_epilogue a1 + .option pop + ret +.endm + +.macro lb_sp_sb_a0 reg, offset + lb_sb \reg, \offset, sp, a0 +.endm + +.macro gen_test_inst_store_c_sp inst_name + .option push + gen_func_header c_\inst_name\()sp, +c + /* Misalign stack pointer */ + sp_stack_prologue a1 + /* Misalign access */ + c.sdsp a2, 0(sp) + copy_long_to t0, sp, a0 + sp_stack_epilogue a1 + .option pop + ret +.endm + + + /* + * a0 = addr to load from + * a1 = address offset + * a2 = value to be loaded + */ +gen_test_inst lh +gen_test_inst lhu +gen_test_inst lw +gen_test_inst lwu +gen_test_inst ld +#ifdef __riscv_compressed +gen_test_inst_c lw +gen_test_inst_c ld +gen_test_inst_load_c_sp ld +#endif + +/* + * a0 = addr where to store value + * a1 = address offset + * a2 = value to be stored + */ +gen_test_inst sh +gen_test_inst sw +gen_test_inst sd +#ifdef __riscv_compressed +gen_test_inst_c sw +gen_test_inst_c sd +gen_test_inst_store_c_sp sd +#endif + diff --git a/tools/testing/selftests/riscv/misaligned/misaligned.c b/tools/testing/selftests/riscv/misaligned/misaligned.c new file mode 100644 index 000000000000..8fa5ad1a93d1 --- /dev/null +++ b/tools/testing/selftests/riscv/misaligned/misaligned.c @@ -0,0 +1,254 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2025 Rivos Inc. + * + * Authors: + * Clément Léger <cleger(a)rivosinc.com> + */ +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <linux/ptrace.h> +#include "../../kselftest_harness.h" + +#include <stdlib.h> +#include <stdio.h> +#include <stdint.h> +#include <float.h> +#include <errno.h> +#include <math.h> +#include <string.h> +#include <signal.h> +#include <stdbool.h> +#include <unistd.h> +#include <inttypes.h> +#include <ucontext.h> + +#include <sys/prctl.h> + +#define stringify(s) __stringify(s) +#define __stringify(s) #s + +#define VAL16 0x1234 +#define VAL32 0xDEADBEEF +#define VAL64 0x45674321D00DF789 + +#define VAL_float 78951.234375 +#define VAL_double 567890.512396965789589290 + +static bool float_equal(float a, float b) +{ + float scaled_epsilon; + float difference = fabsf(a - b); + + // Scale to the largest value. + a = fabsf(a); + b = fabsf(b); + if (a > b) + scaled_epsilon = FLT_EPSILON * a; + else + scaled_epsilon = FLT_EPSILON * b; + + return difference <= scaled_epsilon; +} + +static bool double_equal(double a, double b) +{ + double scaled_epsilon; + double difference = fabsf(a - b); + + // Scale to the largest value. + a = fabs(a); + b = fabs(b); + if (a > b) + scaled_epsilon = DBL_EPSILON * a; + else + scaled_epsilon = DBL_EPSILON * b; + + return difference <= scaled_epsilon; +} + +#define fpu_load_proto(__inst, __type) \ +extern __type test_ ## __inst(unsigned long fp_reg, void *addr, unsigned long offset, __type value) + +fpu_load_proto(flw, float); +fpu_load_proto(fld, double); +fpu_load_proto(c_flw, float); +fpu_load_proto(c_fld, double); +fpu_load_proto(c_fldsp, double); + +#define fpu_store_proto(__inst, __type) \ +extern void test_ ## __inst(unsigned long fp_reg, void *addr, unsigned long offset, __type value) + +fpu_store_proto(fsw, float); +fpu_store_proto(fsd, double); +fpu_store_proto(c_fsw, float); +fpu_store_proto(c_fsd, double); +fpu_store_proto(c_fsdsp, double); + +#define gp_load_proto(__inst, __type) \ +extern __type test_ ## __inst(void *addr, unsigned long offset, __type value) + +gp_load_proto(lh, uint16_t); +gp_load_proto(lhu, uint16_t); +gp_load_proto(lw, uint32_t); +gp_load_proto(lwu, uint32_t); +gp_load_proto(ld, uint64_t); +gp_load_proto(c_lw, uint32_t); +gp_load_proto(c_ld, uint64_t); +gp_load_proto(c_ldsp, uint64_t); + +#define gp_store_proto(__inst, __type) \ +extern void test_ ## __inst(void *addr, unsigned long offset, __type value) + +gp_store_proto(sh, uint16_t); +gp_store_proto(sw, uint32_t); +gp_store_proto(sd, uint64_t); +gp_store_proto(c_sw, uint32_t); +gp_store_proto(c_sd, uint64_t); +gp_store_proto(c_sdsp, uint64_t); + +#define TEST_GP_LOAD(__inst, __type_size) \ +TEST(gp_load_ ## __inst) \ +{ \ + int offset, ret; \ + uint8_t buf[16] __attribute__((aligned(16))); \ + \ + ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \ + ASSERT_EQ(ret, 0); \ + \ + for (offset = 1; offset < __type_size / 8; offset++) { \ + uint ## __type_size ## _t val = VAL ## __type_size; \ + uint ## __type_size ## _t *ptr = (uint ## __type_size ## _t *) (buf + offset); \ + memcpy(ptr, &val, sizeof(val)); \ + val = test_ ## __inst(ptr, offset, val); \ + EXPECT_EQ(VAL ## __type_size, val); \ + } \ +} + +TEST_GP_LOAD(lh, 16); +TEST_GP_LOAD(lhu, 16); +TEST_GP_LOAD(lw, 32); +TEST_GP_LOAD(lwu, 32); +TEST_GP_LOAD(ld, 64); +#ifdef __riscv_compressed +TEST_GP_LOAD(c_lw, 32); +TEST_GP_LOAD(c_ld, 64); +TEST_GP_LOAD(c_ldsp, 64); +#endif + +#define TEST_GP_STORE(__inst, __type_size) \ +TEST(gp_load_ ## __inst) \ +{ \ + int offset, ret; \ + uint8_t buf[16] __attribute__((aligned(16))); \ + \ + ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \ + ASSERT_EQ(ret, 0); \ + \ + for (offset = 1; offset < __type_size / 8; offset++) { \ + uint ## __type_size ## _t val = VAL ## __type_size; \ + uint ## __type_size ## _t *ptr = (uint ## __type_size ## _t *) (buf + offset); \ + memset(ptr, 0, sizeof(val)); \ + test_ ## __inst(ptr, offset, val); \ + memcpy(&val, ptr, sizeof(val)); \ + EXPECT_EQ(VAL ## __type_size, val); \ + } \ +} +TEST_GP_STORE(sh, 16); +TEST_GP_STORE(sw, 32); +TEST_GP_STORE(sd, 64); +#ifdef __riscv_compressed +TEST_GP_STORE(c_sw, 32); +TEST_GP_STORE(c_sd, 64); +TEST_GP_STORE(c_sdsp, 64); +#endif + +#define __TEST_FPU_LOAD(__type, __inst, __reg_start, __reg_end) \ +TEST(fpu_load_ ## __inst) \ +{ \ + int ret, offset, fp_reg; \ + uint8_t buf[16] __attribute__((aligned(16))); \ + \ + ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \ + ASSERT_EQ(ret, 0); \ + \ + for (fp_reg = __reg_start; fp_reg < __reg_end; fp_reg++) { \ + for (offset = 1; offset < 4; offset++) { \ + void *load_addr = (buf + offset); \ + __type val = VAL_ ## __type ; \ + \ + memcpy(load_addr, &val, sizeof(val)); \ + val = test_ ## __inst(fp_reg, load_addr, offset, val); \ + EXPECT_TRUE(__type ##_equal(val, VAL_## __type)); \ + } \ + } \ +} +#define TEST_FPU_LOAD(__type, __inst) \ + __TEST_FPU_LOAD(__type, __inst, 0, 32) +#define TEST_FPU_LOAD_COMPRESSED(__type, __inst) \ + __TEST_FPU_LOAD(__type, __inst, 8, 16) + +TEST_FPU_LOAD(float, flw) +TEST_FPU_LOAD(double, fld) +#ifdef __riscv_compressed +TEST_FPU_LOAD_COMPRESSED(double, c_fld) +TEST_FPU_LOAD_COMPRESSED(double, c_fldsp) +#endif + +#define __TEST_FPU_STORE(__type, __inst, __reg_start, __reg_end) \ +TEST(fpu_store_ ## __inst) \ +{ \ + int ret, offset, fp_reg; \ + uint8_t buf[16] __attribute__((aligned(16))); \ + \ + ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_NOPRINT); \ + ASSERT_EQ(ret, 0); \ + \ + for (fp_reg = __reg_start; fp_reg < __reg_end; fp_reg++) { \ + for (offset = 1; offset < 4; offset++) { \ + \ + void *store_addr = (buf + offset); \ + __type val = VAL_ ## __type ; \ + \ + test_ ## __inst(fp_reg, store_addr, offset, val); \ + memcpy(&val, store_addr, sizeof(val)); \ + EXPECT_TRUE(__type ## _equal(val, VAL_## __type)); \ + } \ + } \ +} +#define TEST_FPU_STORE(__type, __inst) \ + __TEST_FPU_STORE(__type, __inst, 0, 32) +#define TEST_FPU_STORE_COMPRESSED(__type, __inst) \ + __TEST_FPU_STORE(__type, __inst, 8, 16) + +TEST_FPU_STORE(float, fsw) +TEST_FPU_STORE(double, fsd) +#ifdef __riscv_compressed +TEST_FPU_STORE_COMPRESSED(double, c_fsd) +TEST_FPU_STORE_COMPRESSED(double, c_fsdsp) +#endif + +TEST_SIGNAL(gen_sigbus, SIGBUS) +{ + uint32_t *ptr; + uint8_t buf[16] __attribute__((aligned(16))); + int ret; + + ret = prctl(PR_SET_UNALIGN, PR_UNALIGN_SIGBUS); + ASSERT_EQ(ret, 0); + + ptr = (uint32_t *)(buf + 1); + *ptr = 0xDEADBEEFULL; +} + +int main(int argc, char **argv) +{ + int ret, val; + + ret = prctl(PR_GET_UNALIGN, &val); + if (ret == -1 && errno == EINVAL) + ksft_exit_skip("SKIP GET_UNALIGN_CTL not supported\n"); + + exit(test_harness_run(argc, argv)); +} -- 2.49.0

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[PATCH net-next v4] selftests/vsock: add initial vmtest.sh for vsock

by Bobby Eshleman

This commit introduces a new vmtest.sh runner for vsock. It uses virtme-ng/qemu to run tests in a VM. The tests validate G2H, H2G, and loopback. The testing tools from tools/testing/vsock/ are reused. Currently, only vsock_test is used. VMCI and hyperv support is automatically built, though not used. Only tested on x86. To run: $ tools/testing/selftests/vsock/vmtest.sh or $ make -C tools/testing/selftests TARGETS=vsock run_tests Output (vmtest.sh): TAP version 13 1..3 not ok 1 vm_server_host_client # exit=1 ok 1 vm_client_host_server ok 2 vm_loopback SUMMARY: PASS=2 SKIP=0 FAIL=1 1..3 Future work can include vsock_diag_test. The tap output style copies mm's run_vmtests.sh. Because vsock requires a VM to test anything other than loopback, this patch adds vmtest.sh as a kselftest itself. This is different than other systems that have a "vmtest.sh", where it is used as a utility script to spin up a VM to run the selftests as a guest (but isn't hooked into kselftest). I've began testing this in one of the NIPA environments Jakub as graciously provided. I would expect at least one more revision to have that setup ironed out and fully tested. Signed-off-by: Bobby Eshleman <bobbyeshleman(a)gmail.com> --- Changes in v4: - do not use special tab delimiter for help string parsing (Stefano + Paolo) - fix paths for when installing kselftest and running out-of-tree (Paolo) - change vng to using running kernel instead of compiled kernel (Paolo) - use multi-line string for QEMU_OPTS (Stefano) - change timeout to 300s (Paolo) - skip if tools are not found and use kselftests status codes (Paolo) - remove build from vmtest.sh (Paolo) - change 2222 -> SSH_HOST_PORT (Stefano) - add tap-format output - add vmtest.log to gitignore - check for vsock_test binary and remind user to build it if missing - create a proper build in makefile - style fixes - add ssh, timeout, and pkill to dependency check, just in case - fix numerical comparison in conditionals - check qemu pidfile exists before proceeding (avoid wasting time waiting for ssh) - fix tracking of pass/fail bug - fix stderr redirection bug - Link to v3: https://lore.kernel.org/r/20250428-vsock-vmtest-v3-1-181af6163f3e@gmail.com Changes in v3: - use common conditional syntax for checking variables - use return value instead of global rc - fix typo TEST_HOST_LISTENER_PORT -> TEST_HOST_PORT_LISTENER - use SIGTERM instead of SIGKILL on cleanup - use peer-cid=1 for loopback - change sleep delay times into globals - fix test_vm_loopback logging - add test selection in arguments - make QEMU an argument - check that vng binary is on path - use QEMU variable - change <tab><backslash> to <space><backslash> - fix hardcoded file paths - add comment in commit msg about script that vmtest.sh was based off of - Add tools/testing/selftest/vsock/Makefile for kselftest - Link to v2: https://lore.kernel.org/r/20250417-vsock-vmtest-v2-1-3901a27331e8@gmail.com Changes in v2: - add kernel oops and warnings checker - change testname variable to use FUNCNAME - fix spacing in test_vm_server_host_client - add -s skip build option to vmtest.sh - add test_vm_loopback - pass port to vm_wait_for_listener - fix indentation in vmtest.sh - add vmci and hyperv to config - changed whitespace from tabs to spaces in help string - Link to v1: https://lore.kernel.org/r/20250410-vsock-vmtest-v1-1-f35a81dab98c@gmail.com --- MAINTAINERS | 1 + tools/testing/selftests/vsock/.gitignore | 2 + tools/testing/selftests/vsock/Makefile | 17 ++ tools/testing/selftests/vsock/config | 114 +++++++++ tools/testing/selftests/vsock/settings | 1 + tools/testing/selftests/vsock/vmtest.sh | 423 +++++++++++++++++++++++++++++++ 6 files changed, 558 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 657a67f9031e..3fbdd7bbfce7 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -25751,6 +25751,7 @@ F: include/uapi/linux/vm_sockets.h F: include/uapi/linux/vm_sockets_diag.h F: include/uapi/linux/vsockmon.h F: net/vmw_vsock/ +F: tools/testing/selftests/vsock/ F: tools/testing/vsock/ VMALLOC diff --git a/tools/testing/selftests/vsock/.gitignore b/tools/testing/selftests/vsock/.gitignore new file mode 100644 index 000000000000..9c5bf379480f --- /dev/null +++ b/tools/testing/selftests/vsock/.gitignore @@ -0,0 +1,2 @@ +vmtest.log +vsock_test diff --git a/tools/testing/selftests/vsock/Makefile b/tools/testing/selftests/vsock/Makefile new file mode 100644 index 000000000000..71fca0a2b8da --- /dev/null +++ b/tools/testing/selftests/vsock/Makefile @@ -0,0 +1,17 @@ +# SPDX-License-Identifier: GPL-2.0 + +CURDIR := $(abspath .) +TOOLSDIR := $(abspath ../../..) + +$(OUTPUT)/vsock_test: $(TOOLSDIR)/testing/vsock/vsock_test + install -m 755 $< $@ + +$(TOOLSDIR)/testing/vsock/vsock_test: + $(MAKE) -C $(TOOLSDIR)/testing/vsock vsock_test + +TEST_PROGS += vmtest.sh +EXTRA_CLEAN += vmtest.log +TEST_GEN_FILES := vsock_test + +include ../lib.mk + diff --git a/tools/testing/selftests/vsock/config b/tools/testing/selftests/vsock/config new file mode 100644 index 000000000000..3bffaaf98fff --- /dev/null +++ b/tools/testing/selftests/vsock/config @@ -0,0 +1,114 @@ +CONFIG_BLK_DEV_INITRD=y +CONFIG_BPF=y +CONFIG_BPF_SYSCALL=y +CONFIG_BPF_JIT=y +CONFIG_HAVE_EBPF_JIT=y +CONFIG_BPF_EVENTS=y +CONFIG_FTRACE_SYSCALLS=y +CONFIG_FUNCTION_TRACER=y +CONFIG_HAVE_DYNAMIC_FTRACE=y +CONFIG_DYNAMIC_FTRACE=y +CONFIG_HAVE_KPROBES=y +CONFIG_KPROBES=y +CONFIG_KPROBE_EVENTS=y +CONFIG_ARCH_SUPPORTS_UPROBES=y +CONFIG_UPROBES=y +CONFIG_UPROBE_EVENTS=y +CONFIG_DEBUG_FS=y +CONFIG_FW_CFG_SYSFS=y +CONFIG_FW_CFG_SYSFS_CMDLINE=y +CONFIG_DRM=y +CONFIG_DRM_VIRTIO_GPU=y +CONFIG_DRM_VIRTIO_GPU_KMS=y +CONFIG_DRM_BOCHS=y +CONFIG_VIRTIO_IOMMU=y +CONFIG_SOUND=y +CONFIG_SND=y +CONFIG_SND_SEQUENCER=y +CONFIG_SND_PCI=y +CONFIG_SND_INTEL8X0=y +CONFIG_SND_HDA_CODEC_REALTEK=y +CONFIG_SECURITYFS=y +CONFIG_CGROUP_BPF=y +CONFIG_SQUASHFS=y +CONFIG_SQUASHFS_XZ=y +CONFIG_SQUASHFS_ZSTD=y +CONFIG_FUSE_FS=y +CONFIG_SERIO=y +CONFIG_PCI=y +CONFIG_INPUT=y +CONFIG_INPUT_KEYBOARD=y +CONFIG_KEYBOARD_ATKBD=y +CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y +CONFIG_X86_VERBOSE_BOOTUP=y +CONFIG_VGA_CONSOLE=y +CONFIG_FB=y +CONFIG_FB_VESA=y +CONFIG_FRAMEBUFFER_CONSOLE=y +CONFIG_RTC_CLASS=y +CONFIG_RTC_HCTOSYS=y +CONFIG_RTC_DRV_CMOS=y +CONFIG_HYPERVISOR_GUEST=y +CONFIG_PARAVIRT=y +CONFIG_KVM_GUEST=y +CONFIG_KVM=y +CONFIG_KVM_INTEL=y +CONFIG_KVM_AMD=y +CONFIG_VSOCKETS=y +CONFIG_VSOCKETS_DIAG=y +CONFIG_VSOCKETS_LOOPBACK=y +CONFIG_VMWARE_VMCI_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS_COMMON=y +CONFIG_HYPERV_VSOCKETS=y +CONFIG_VMWARE_VMCI=y +CONFIG_VHOST_VSOCK=y +CONFIG_HYPERV=y +CONFIG_UEVENT_HELPER=n +CONFIG_VIRTIO=y +CONFIG_VIRTIO_PCI=y +CONFIG_VIRTIO_MMIO=y +CONFIG_VIRTIO_BALLOON=y +CONFIG_NET=y +CONFIG_NET_CORE=y +CONFIG_NETDEVICES=y +CONFIG_NETWORK_FILESYSTEMS=y +CONFIG_INET=y +CONFIG_NET_9P=y +CONFIG_NET_9P_VIRTIO=y +CONFIG_9P_FS=y +CONFIG_VIRTIO_NET=y +CONFIG_CMDLINE_OVERRIDE=n +CONFIG_BINFMT_SCRIPT=y +CONFIG_SHMEM=y +CONFIG_TMPFS=y +CONFIG_UNIX=y +CONFIG_MODULE_SIG_FORCE=n +CONFIG_DEVTMPFS=y +CONFIG_TTY=y +CONFIG_VT=y +CONFIG_UNIX98_PTYS=y +CONFIG_EARLY_PRINTK=y +CONFIG_INOTIFY_USER=y +CONFIG_BLOCK=y +CONFIG_SCSI_LOWLEVEL=y +CONFIG_SCSI=y +CONFIG_SCSI_VIRTIO=y +CONFIG_BLK_DEV_SD=y +CONFIG_VIRTIO_CONSOLE=y +CONFIG_WATCHDOG=y +CONFIG_WATCHDOG_CORE=y +CONFIG_I6300ESB_WDT=y +CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y +CONFIG_OVERLAY_FS=y +CONFIG_DAX=y +CONFIG_DAX_DRIVER=y +CONFIG_FS_DAX=y +CONFIG_MEMORY_HOTPLUG=y +CONFIG_MEMORY_HOTREMOVE=y +CONFIG_ZONE_DEVICE=y +CONFIG_FUSE_FS=y +CONFIG_VIRTIO_FS=y +CONFIG_VSOCKETS=y +CONFIG_VIRTIO_VSOCKETS=y diff --git a/tools/testing/selftests/vsock/settings b/tools/testing/selftests/vsock/settings new file mode 100644 index 000000000000..694d70710ff0 --- /dev/null +++ b/tools/testing/selftests/vsock/settings @@ -0,0 +1 @@ +timeout=300 diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh new file mode 100755 index 000000000000..d7e727306175 --- /dev/null +++ b/tools/testing/selftests/vsock/vmtest.sh @@ -0,0 +1,423 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (c) 2025 Meta Platforms, Inc. and affiliates +# +# Dependencies: +# * virtme-ng +# * busybox-static (used by virtme-ng) +# * qemu (used by virtme-ng) + +TAP_PREFIX="# " +VERBOSE=0 +KSFT_PASS=0 +KSFT_FAIL=1 +KSFT_SKIP=4 +SCRIPT_DIR="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)" +VSOCK_TEST=${SCRIPT_DIR}/vsock_test + +TEST_GUEST_PORT=51000 +TEST_HOST_PORT=50000 +TEST_HOST_PORT_LISTENER=50001 +SSH_GUEST_PORT=22 +SSH_HOST_PORT=2222 +VSOCK_CID=1234 +WAIT_PERIOD=3 +WAIT_PERIOD_MAX=20 +WAIT_TOTAL=$(( WAIT_PERIOD * WAIT_PERIOD_MAX )) + +QEMU_PIDFILE=/tmp/qemu.pid + +# virtme-ng offers a netdev for ssh when using "--ssh", but we also need a +# control port forwarded for vsock_test. Because virtme-ng doesn't support +# adding an additional port to forward to the device created from "--ssh" and +# virtme-init mistakenly sets identical IPs to the ssh device and additional +# devices, we instead opt out of using --ssh, add the device manually, and also +# add the kernel cmdline options that virtme-init uses to setup the interface. +QEMU_TEST_PORT_FWD="hostfwd=tcp::${TEST_HOST_PORT}-:${TEST_GUEST_PORT}" +QEMU_SSH_PORT_FWD="hostfwd=tcp::${SSH_HOST_PORT}-:${SSH_GUEST_PORT}" +QEMU_OPTS="\ + -netdev user,id=n0,${QEMU_TEST_PORT_FWD},${QEMU_SSH_PORT_FWD} \ + -device virtio-net-pci,netdev=n0 \ + -device vhost-vsock-pci,guest-cid=${VSOCK_CID} \ + --pidfile ${QEMU_PIDFILE} \ +" +KERNEL_CMDLINE="virtme.dhcp net.ifnames=0 biosdevname=0 virtme.ssh virtme_ssh_user=$USER" + +LOG=${SCRIPT_DIR}/vmtest.log + +TEST_NAMES=(vm_server_host_client vm_client_host_server vm_loopback) +TEST_DESCS=( + "Run vsock_test in server mode on the VM and in client mode on the host." + "Run vsock_test in client mode on the VM and in server mode on the host." + "Run vsock_test using the loopback transport in the VM." +) + +usage() { + local name + local desc + local i + echo + echo "$0 [OPTIONS] [TEST]..." + echo "If no TEST argument is given, all tests will be run." + echo + echo "Options" + echo " -v: verbose output" + echo + echo "Available tests" + + for ((i = 0; i < ${#TEST_NAMES[@]}; i++)); do + name=${TEST_NAMES[${i}]} + desc=${TEST_DESCS[${i}]} + printf "\t%-35s%-35s\n" "${name}" "${desc}" + done + echo + + exit 1 +} + +die() { + echo "$*" >&2 + exit ${KSFT_FAIL} +} + +vm_ssh() { + ssh -q -o UserKnownHostsFile=/dev/null -p ${SSH_HOST_PORT} localhost $* + return $? +} + +cleanup() { + if [[ -f "${QEMU_PIDFILE}" ]]; then + pkill -SIGTERM -F ${QEMU_PIDFILE} 2>&1 > /dev/null + fi +} + +check_args() { + local found + + for arg in "$@"; do + found=0 + for name in "${TEST_NAMES[@]}"; do + if [[ "${name}" = "${arg}" ]]; then + found=1 + break + fi + done + + if [[ "${found}" -eq 0 ]]; then + echo "${arg} is not an available test" >&2 + usage + fi + done + + for arg in "$@"; do + if ! command -v > /dev/null "test_${arg}"; then + echo "Test ${arg} not found" >&2 + usage + fi + done +} + +check_deps() { + for dep in vng ${QEMU} busybox timeout pkill ssh; do + if [[ ! -x "$(command -v ${dep})" ]]; then + echo -e "skip: dependency ${dep} not found!\n" + exit ${KSFT_SKIP} + fi + done + + if [[ ! -x $(command -v ${VSOCK_TEST}) ]]; then + printf "skip: ${VSOCK_TEST} not found!" + printf " Please build the kselftest vsock target.\n" + exit ${KSFT_SKIP} + fi +} + +vm_setup() { + local VNG_OPTS="" + local logfile=/dev/null + + if [[ "${VERBOSE}" = 1 ]]; then + VNG_OPTS="--verbose" + logfile=/dev/stdout + fi + vng \ + $VNG_OPTS \ + --run \ + --qemu-opts="${QEMU_OPTS}" \ + --qemu="${QEMU}" \ + --user root \ + --append "${KERNEL_CMDLINE}" \ + --rw &> ${logfile} & + + timeout ${WAIT_TOTAL} \ + bash -c 'while [[ ! -e '"${QEMU_PIDFILE}"' ]]; do sleep 1; done; exit 0' + if [[ ! $? -eq 0 ]]; then + die "failed to boot VM" + fi +} + +vm_wait_for_ssh() { + i=0 + while [[ true ]]; do + if [[ ${i} -gt ${WAIT_PERIOD_MAX} ]]; then + die "Timed out waiting for guest ssh" + fi + vm_ssh -- true + if [[ $? -eq 0 ]]; then + break + fi + i=$(( i + 1 )) + sleep ${WAIT_PERIOD} + done +} + +wait_for_listener() { + local port=$1 + local interval=$2 + local max_intervals=$3 + local i=0 + while ! ss -ltn | grep -q ":${port}"; do + if [[ ${i} -gt ${max_intervals} ]]; then + die "Timed out waiting for listener on port ${port}" + fi + i=$(( i + 1 )) + sleep ${interval} + done +} + +vm_wait_for_listener() { + local port=$1 + vm_ssh <<EOF +$(declare -f wait_for_listener) +wait_for_listener ${port} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX} +EOF +} + +host_wait_for_listener() { + wait_for_listener ${TEST_HOST_PORT_LISTENER} ${WAIT_PERIOD} ${WAIT_PERIOD_MAX} +} + +__log_stdin() { + cat | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }' +} + +__log_args() { + echo "$*" | awk '{ printf "%s:\t%s\n","'"${prefix}"'", $0 }' +} + +log() { + local prefix="$1" + shift + + local redirect= + if [[ ${VERBOSE} -eq 0 ]]; then + redirect=/dev/null + else + redirect=/dev/stdout + fi + + if [[ "$#" -eq 0 ]]; then + __log_stdin | tee -a ${LOG} > ${redirect} + else + __log_args | tee -a ${LOG} > ${redirect} + fi +} + +log_setup() { + log "setup" "$@" +} + +log_host() { + testname=$1 + shift + log "test:${testname}:host" "$@" +} + +log_guest() { + testname=$1 + shift + log "test:${testname}:guest" "$@" +} + +tap_prefix() { + sed -e "s/^/${TAP_PREFIX}/" +} + +tap_output() { + if [[ ! -z "$TAP_PREFIX" ]]; then + read str + echo $str + fi +} + +test_vm_server_host_client() { + local testname="${FUNCNAME[0]#test_}" + + vm_ssh -- "${VSOCK_TEST}" \ + --mode=server \ + --control-port="${TEST_GUEST_PORT}" \ + --peer-cid=2 \ + 2>&1 | log_guest "${testname}" & + + vm_wait_for_listener ${TEST_GUEST_PORT} + + ${VSOCK_TEST} \ + --mode=client \ + --control-host=127.0.0.1 \ + --peer-cid="${VSOCK_CID}" \ + --control-port="${TEST_HOST_PORT}" 2>&1 | log_host "${testname}" + + return $? +} + +test_vm_client_host_server() { + local testname="${FUNCNAME[0]#test_}" + + ${VSOCK_TEST} \ + --mode "server" \ + --control-port "${TEST_HOST_PORT_LISTENER}" \ + --peer-cid "${VSOCK_CID}" 2>&1 | log_host "${testname}" & + + host_wait_for_listener + + vm_ssh -- "${VSOCK_TEST}" \ + --mode=client \ + --control-host=10.0.2.2 \ + --peer-cid=2 \ + --control-port="${TEST_HOST_PORT_LISTENER}" 2>&1 | log_guest "${testname}" + + return $? +} + +test_vm_loopback() { + local testname="${FUNCNAME[0]#test_}" + local port=60000 # non-forwarded local port + + vm_ssh -- ${VSOCK_TEST} \ + --mode=server \ + --control-port="${port}" \ + --peer-cid=1 2>&1 | log_guest "${testname}" & + + vm_wait_for_listener ${port} + + vm_ssh -- ${VSOCK_TEST} \ + --mode=client \ + --control-host="127.0.0.1" \ + --control-port="${port}" \ + --peer-cid=1 2>&1 | log_guest "${testname}" + + return $? +} + +run_test() { + unset IFS + local host_oops_cnt_before + local host_warn_cnt_before + local vm_oops_cnt_before + local vm_warn_cnt_before + local host_oops_cnt_after + local host_warn_cnt_after + local vm_oops_cnt_after + local vm_warn_cnt_after + local name + local rc + + host_oops_cnt_before=$(dmesg | grep -c -i 'Oops') + host_warn_cnt_before=$(dmesg --level=warn | wc -l) + vm_oops_cnt_before=$(vm_ssh -- dmesg | grep -c -i 'Oops') + vm_warn_cnt_before=$(vm_ssh -- dmesg --level=warn | wc -l) + + name=$(echo "${1}" | awk '{ print $1 }') + eval test_"${name}" + rc=$? + + host_oops_cnt_after=$(dmesg | grep -i 'Oops' | wc -l) + if [[ ${host_oops_cnt_after} -gt ${host_oops_cnt_before} ]]; then + echo "${name}: kernel oops detected on host" | log_host ${name} + rc=$KSFT_FAIL + fi + + host_warn_cnt_after=$(dmesg --level=warn | wc -l) + if [[ ${host_warn_cnt_after} -gt ${host_warn_cnt_before} ]]; then + echo "${name}: kernel warning detected on host" | log_host ${name} + rc=$KSFT_FAIL + fi + + vm_oops_cnt_after=$(vm_ssh -- dmesg | grep -i 'Oops' | wc -l) + if [[ ${vm_oops_cnt_after} -gt ${vm_oops_cnt_before} ]]; then + echo "${name}: kernel oops detected on vm" | log_host ${name} + rc=$KSFT_FAIL + fi + + vm_warn_cnt_after=$(vm_ssh -- dmesg --level=warn | wc -l) + if [[ ${vm_warn_cnt_after} -gt ${vm_warn_cnt_before} ]]; then + echo "${name}: kernel warning detected on vm" | log_host ${name} + rc=$KSFT_FAIL + fi + + return ${rc} +} + +while getopts :hvsq: o +do + case $o in + v) VERBOSE=1;; + q) QEMU=$OPTARG;; + h|*) usage;; + esac +done +shift $((OPTIND-1)) + +trap cleanup EXIT + +if [[ ${#} -eq 0 ]]; then + ARGS=(${TEST_NAMES[@]}) +else + ARGS=($@) +fi + +check_args "${ARGS[@]}" +check_deps + +QEMU=$(command -v ${QEMU:-qemu-system-$(uname -m)}) + +echo "TAP version 13" | tap_output +echo "1..${#ARGS[@]}" | tap_output + +rm -f "${LOG}" +log_setup "Booting up VM" +vm_setup +vm_wait_for_ssh +log_setup "VM booted up" + +cnt_pass=0 +cnt_fail=0 +cnt_skip=0 +cnt_total=0 +exitcode=0 +for arg in "${ARGS[@]}"; do + run_test "${arg}" + rc=$? + if [[ ${rc} == $KSFT_PASS ]]; then + cnt_pass=$(( cnt_pass + 1 )) + echo "[PASS]" | tap_prefix + echo "ok ${cnt_total} ${arg}" | tap_output + elif [[ ${rc} == $KSFT_SKIP ]]; then + cnt_skip=$(( cnt_skip + 1 )) + echo "[SKIP]" | tap_prefix + echo "ok ${cnt_total} ${arg} # SKIP" | tap_output + exitcode=$KSFT_SKIP + elif [[ ${rc} == $KSFT_FAIL ]]; then + cnt_fail=$(( cnt_fail + 1 )) + echo "[FAIL]" | tap_prefix + echo "not ok ${cnt_fail} ${arg} # exit=$rc" | tap_output + exitcode=$KSFT_FAIL + fi + cnt_total=$(( cnt_total + 1 )) +done + +echo "SUMMARY: PASS=${cnt_pass} SKIP=${cnt_skip} FAIL=${cnt_fail}" | tap_prefix +echo "1..${cnt_total}" | tap_output + +exit ${rc} --- base-commit: 8066e388be48f1ad62b0449dc1d31a25489fa12a change-id: 20250325-vsock-vmtest-b3a21d2102c2 Best regards, -- Bobby Eshleman <bobbyeshleman(a)gmail.com>

5 months, 2 weeks

2
2
0 0

[PATCH] selftests: add missing include

by Chen Linxuan

I failed to build this test on Ubuntu 24.04. Compiler complained about undefined functions mount, umount and some mount related flags. Signed-off-by: Chen Linxuan <chenlinxuan(a)uniontech.com> --- tools/testing/selftests/pid_namespace/pid_max.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/pid_namespace/pid_max.c b/tools/testing/selftests/pid_namespace/pid_max.c index 51c414faabb0f..972bedc475f12 100644 --- a/tools/testing/selftests/pid_namespace/pid_max.c +++ b/tools/testing/selftests/pid_namespace/pid_max.c @@ -11,6 +11,7 @@ #include <string.h> #include <syscall.h> #include <sys/wait.h> +#include <sys/mount.h> #include "../kselftest_harness.h" #include "../pidfd/pidfd.h" -- 2.43.0

5 months, 2 weeks

1
0
0 0

[PATCH] selftests: size: fix grammar and align output formatting

by Abdelrahman Fekry

Improve the grammar in the test name by changing "get runtime memory use" to "get runtime memory usage". Also adjust spacing in output lines ("Total:", "Free:", etc.) to ensure consistent alignment and readability. Signed-off-by: Abdelrahman Fekry <AbdelrahmanFekry375(a)gmail.com> --- tools/testing/selftests/size/get_size.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/size/get_size.c b/tools/testing/selftests/size/get_size.c index 2980b1a63366..d5b67c073d8e 100644 --- a/tools/testing/selftests/size/get_size.c +++ b/tools/testing/selftests/size/get_size.c @@ -86,7 +86,7 @@ void _start(void) int ccode; struct sysinfo info; unsigned long used; - static const char *test_name = " get runtime memory use\n"; + static const char *test_name = " get runtime memory usage\n"; print("TAP version 13\n"); print("# Testing system size.\n"); @@ -105,8 +105,8 @@ void _start(void) used = info.totalram - info.freeram - info.bufferram; print("# System runtime memory report (units in Kilobytes):\n"); print(" ---\n"); - print_k_value(" Total: ", info.totalram, info.mem_unit); - print_k_value(" Free: ", info.freeram, info.mem_unit); + print_k_value(" Total : ", info.totalram, info.mem_unit); + print_k_value(" Free : ", info.freeram, info.mem_unit); print_k_value(" Buffer: ", info.bufferram, info.mem_unit); print_k_value(" In use: ", used, info.mem_unit); print(" ...\n"); -- 2.25.1

5 months, 2 weeks

1
0
0 0

[PATCH] Fix typo in 'limit' for bpf test

by Thomas Thelen

Signed-off-by: Thomas Thelen <tommythelen(a)gmail.com> --- tools/testing/selftests/bpf/bench.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/bench.c b/tools/testing/selftests/bpf/bench.c index 1bd403a5ef7b..b25db4142126 100644 --- a/tools/testing/selftests/bpf/bench.c +++ b/tools/testing/selftests/bpf/bench.c @@ -497,7 +497,7 @@ extern const struct bench bench_rename_rawtp; extern const struct bench bench_rename_fentry; extern const struct bench bench_rename_fexit; -/* pure counting benchmarks to establish theoretical lmits */ +/* pure counting benchmarks to establish theoretical limits */ extern const struct bench bench_trig_usermode_count; extern const struct bench bench_trig_syscall_count; extern const struct bench bench_trig_kernel_count; -- 2.48.1

5 months, 2 weeks

1
0
0 0

[RFC PATCH 00/39] 1G page support for guest_memfd

by Ackerley Tng

Hello, This patchset is our exploration of how to support 1G pages in guest_memfd, and how the pages will be used in Confidential VMs. The patchset covers: + How to get 1G pages + Allowing mmap() of guest_memfd to userspace so that both private and shared memory can use the same physical pages + Splitting and reconstructing pages to support conversions and mmap() + How the VM, userspace and guest_memfd interact to support conversions + Selftests to test all the above + Selftests also demonstrate the conversion flow between VM, userspace and guest_memfd. Why 1G pages in guest memfd? Bring guest_memfd to performance and memory savings parity with VMs that are backed by HugeTLBfs. + Performance is improved with 1G pages by more TLB hits and faster page walks on TLB misses. + Memory savings from 1G pages comes from HugeTLB Vmemmap Optimization (HVO). Options for 1G page support: 1. HugeTLB 2. Contiguous Memory Allocator (CMA) 3. Other suggestions are welcome! Comparison between options: 1. HugeTLB + Refactor HugeTLB to separate allocator from the rest of HugeTLB + Pro: Graceful transition for VMs backed with HugeTLB to guest_memfd + Near term: Allows co-tenancy of HugeTLB and guest_memfd backed VMs + Pro: Can provide iterative steps toward new future allocator + Unexplored: Managing userspace-visible changes + e.g. HugeTLB's free_hugepages will decrease if HugeTLB is used, but not when future allocator is used 2. CMA + Port some HugeTLB features to be applied on CMA + Pro: Clean slate What would refactoring HugeTLB involve? (Some refactoring was done in this RFC, more can be done.) 1. Broadly involves separating the HugeTLB allocator from the rest of HugeTLB + Brings more modularity to HugeTLB + No functionality change intended + Likely step towards HugeTLB's integration into core-mm 2. guest_memfd will use just the allocator component of HugeTLB, not including the complex parts of HugeTLB like + Userspace reservations (resv_map) + Shared PMD mappings + Special page walkers What features would need to be ported to CMA? + Improved allocation guarantees + Per NUMA node pool of huge pages + Subpools per guest_memfd + Memory savings + Something like HugeTLB Vmemmap Optimization + Configuration/reporting features + Configuration of number of pages available (and per NUMA node) at and after host boot + Reporting of memory usage/availability statistics at runtime HugeTLB was picked as the source of 1G pages for this RFC because it allows a graceful transition, and retains memory savings from HVO. To illustrate this, if a host machine uses HugeTLBfs to back VMs, and a confidential VM were to be scheduled on that host, some HugeTLBfs pages would have to be given up and returned to CMA for guest_memfd pages to be rebuilt from that memory. This requires memory to be reserved for HVO to be removed and reapplied on the new guest_memfd memory. This not only slows down memory allocation but also trims the benefits of HVO. Memory would have to be reserved on the host to facilitate these transitions. Improving how guest_memfd uses the allocator in a future revision of this RFC: To provide an easier transition away from HugeTLB, guest_memfd's use of HugeTLB should be limited to these allocator functions: + reserve(node, page_size, num_pages) => opaque handle + Used when a guest_memfd inode is created to reserve memory from backend allocator + allocate(handle, mempolicy, page_size) => folio + To allocate a folio from guest_memfd's reservation + split(handle, folio, target_page_size) => void + To take a huge folio, and split it to smaller folios, restore to filemap + reconstruct(handle, first_folio, nr_pages) => void + To take a folio, and reconstruct a huge folio out of nr_pages from the first_folio + free(handle, folio) => void + To return folio to guest_memfd's reservation + error(handle, folio) => void + To handle memory errors + unreserve(handle) => void + To return guest_memfd's reservation to allocator backend Userspace should only provide a page size when creating a guest_memfd and should not have to specify HugeTLB. Overview of patches: + Patches 01-12 + Many small changes to HugeTLB, mostly to separate HugeTLBfs concepts from HugeTLB, and to expose HugeTLB functions. + Patches 13-16 + Letting guest_memfd use HugeTLB + Creation of each guest_memfd reserves pages from HugeTLB's global hstate and puts it into the guest_memfd inode's subpool + Each folio allocation takes a page from the guest_memfd inode's subpool + Patches 17-21 + Selftests for new HugeTLB features in guest_memfd + Patches 22-24 + More small changes on the HugeTLB side to expose functions needed by guest_memfd + Patch 25: + Uses the newly available functions from patches 22-24 to split HugeTLB pages. In this patch, HugeTLB folios are always split to 4K before any usage, private or shared. + Patches 26-28 + Allow mmap() in guest_memfd and faulting in shared pages + Patch 29 + Enables conversion between private/shared pages + Patch 30 + Required to zero folios after conversions to avoid leaking initialized kernel memory + Patch 31-38 + Add selftests to test mapping pages to userspace, guest/host memory sharing and update conversions tests + Patch 33 illustrates the conversion flow between VM/userspace/guest_memfd + Patch 39 + Dynamically split and reconstruct HugeTLB pages instead of always splitting before use. All earlier selftests are expected to still pass. TODOs: + Add logic to wait for safe_refcount [1] + Look into lazy splitting/reconstruction of pages + Currently, when the KVM_SET_MEMORY_ATTRIBUTES is invoked, not only is the mem_attr_array and faultability updated, the pages in the requested range are also split/reconstructed as necessary. We want to look into delaying splitting/reconstruction to fault time. + Solve race between folios being faulted in and being truncated + When running private_mem_conversions_test with more than 1 vCPU, a folio getting truncated may get faulted in by another process, causing elevated mapcounts when the folio is freed (VM_BUG_ON_FOLIO). + Add intermediate splits (1G should first split to 2M and not split directly to 4K) + Use guest's lock instead of hugetlb_lock + Use multi-index xarray/replace xarray with some other data struct for faultability flag + Refactor HugeTLB better, present generic allocator interface Please let us know your thoughts on: + HugeTLB as the choice of transitional allocator backend + Refactoring HugeTLB to provide generic allocator interface + Shared/private conversion flow + Requiring user to request kernel to unmap pages from userspace using madvise(MADV_DONTNEED) + Failing conversion on elevated mapcounts/pincounts/refcounts + Process of splitting/reconstructing page + Anything else! [1] https://lore.kernel.org/all/20240829-guest-memfd-lib-v2-0-b9afc1ff3656@quic… Ackerley Tng (37): mm: hugetlb: Simplify logic in dequeue_hugetlb_folio_vma() mm: hugetlb: Refactor vma_has_reserves() to should_use_hstate_resv() mm: hugetlb: Remove unnecessary check for avoid_reserve mm: mempolicy: Refactor out policy_node_nodemask() mm: hugetlb: Refactor alloc_buddy_hugetlb_folio_with_mpol() to interpret mempolicy instead of vma mm: hugetlb: Refactor dequeue_hugetlb_folio_vma() to use mpol mm: hugetlb: Refactor out hugetlb_alloc_folio mm: truncate: Expose preparation steps for truncate_inode_pages_final mm: hugetlb: Expose hugetlb_subpool_{get,put}_pages() mm: hugetlb: Add option to create new subpool without using surplus mm: hugetlb: Expose hugetlb_acct_memory() mm: hugetlb: Move and expose hugetlb_zero_partial_page() KVM: guest_memfd: Make guest mem use guest mem inodes instead of anonymous inodes KVM: guest_memfd: hugetlb: initialization and cleanup KVM: guest_memfd: hugetlb: allocate and truncate from hugetlb KVM: guest_memfd: Add page alignment check for hugetlb guest_memfd KVM: selftests: Add basic selftests for hugetlb-backed guest_memfd KVM: selftests: Support various types of backing sources for private memory KVM: selftests: Update test for various private memory backing source types KVM: selftests: Add private_mem_conversions_test.sh KVM: selftests: Test that guest_memfd usage is reported via hugetlb mm: hugetlb: Expose vmemmap optimization functions mm: hugetlb: Expose HugeTLB functions for promoting/demoting pages mm: hugetlb: Add functions to add/move/remove from hugetlb lists KVM: guest_memfd: Track faultability within a struct kvm_gmem_private KVM: guest_memfd: Allow mmapping guest_memfd files KVM: guest_memfd: Use vm_type to determine default faultability KVM: Handle conversions in the SET_MEMORY_ATTRIBUTES ioctl KVM: guest_memfd: Handle folio preparation for guest_memfd mmap KVM: selftests: Allow vm_set_memory_attributes to be used without asserting return value of 0 KVM: selftests: Test using guest_memfd memory from userspace KVM: selftests: Test guest_memfd memory sharing between guest and host KVM: selftests: Add notes in private_mem_kvm_exits_test for mmap-able guest_memfd KVM: selftests: Test that pinned pages block KVM from setting memory attributes to PRIVATE KVM: selftests: Refactor vm_mem_add to be more flexible KVM: selftests: Add helper to perform madvise by memslots KVM: selftests: Update private_mem_conversions_test for mmap()able guest_memfd Vishal Annapurve (2): KVM: guest_memfd: Split HugeTLB pages for guest_memfd use KVM: guest_memfd: Dynamically split/reconstruct HugeTLB page fs/hugetlbfs/inode.c | 35 +- include/linux/hugetlb.h | 54 +- include/linux/kvm_host.h | 1 + include/linux/mempolicy.h | 2 + include/linux/mm.h | 1 + include/uapi/linux/kvm.h | 26 + include/uapi/linux/magic.h | 1 + mm/hugetlb.c | 346 ++-- mm/hugetlb_vmemmap.h | 11 - mm/mempolicy.c | 36 +- mm/truncate.c | 26 +- tools/include/linux/kernel.h | 4 +- tools/testing/selftests/kvm/Makefile | 3 + .../kvm/guest_memfd_hugetlb_reporting_test.c | 222 +++ .../selftests/kvm/guest_memfd_pin_test.c | 104 ++ .../selftests/kvm/guest_memfd_sharing_test.c | 160 ++ .../testing/selftests/kvm/guest_memfd_test.c | 238 ++- .../testing/selftests/kvm/include/kvm_util.h | 45 +- .../testing/selftests/kvm/include/test_util.h | 18 + tools/testing/selftests/kvm/lib/kvm_util.c | 443 +++-- tools/testing/selftests/kvm/lib/test_util.c | 99 ++ .../kvm/x86_64/private_mem_conversions_test.c | 158 +- .../x86_64/private_mem_conversions_test.sh | 91 + .../kvm/x86_64/private_mem_kvm_exits_test.c | 11 +- virt/kvm/guest_memfd.c | 1563 ++++++++++++++++- virt/kvm/kvm_main.c | 17 + virt/kvm/kvm_mm.h | 16 + 27 files changed, 3288 insertions(+), 443 deletions(-) create mode 100644 tools/testing/selftests/kvm/guest_memfd_hugetlb_reporting_test.c create mode 100644 tools/testing/selftests/kvm/guest_memfd_pin_test.c create mode 100644 tools/testing/selftests/kvm/guest_memfd_sharing_test.c create mode 100755 tools/testing/selftests/kvm/x86_64/private_mem_conversions_test.sh -- 2.46.0.598.g6f2099f65c-goog

5 months, 2 weeks

17
129
0 0

[PATCH] selftests: Suppress unused variable warning

by Chen Linxuan

When running `make kselftest`, the following compilation warning was encountered: mount-notify_test.c: In function ‘fanotify_rmdir’: mount-notify_test.c:490:17: warning: ignoring return value of ‘chdir’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 490 | chdir("/"); | ^~~~~~~~~~ This patch addresses the warning by explicitly suppressing the unused result of the `chdir` function. Signed-off-by: Chen Linxuan <chenlinxuan(a)uniontech.com> --- .../selftests/filesystems/mount-notify/mount-notify_test.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c index 59a71f22fb118..de847e2b12017 100644 --- a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c +++ b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c @@ -487,7 +487,9 @@ TEST_F(fanotify, rmdir) ASSERT_GE(ret, 0); if (ret == 0) { - chdir("/"); + // Suppress -Wunused-result + // Ref: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425#c34 + (void) !chdir("/"); unshare(CLONE_NEWNS); mount("", "/", NULL, MS_REC|MS_PRIVATE, NULL); umount2("/a", MNT_DETACH); -- 2.43.0

5 months, 2 weeks

1
0
0 0

[PATCH net-next v14 0/9] Device memory TCP TX

by Mina Almasry

v14: https://lore.kernel.org/netdev/20250429032645.363766-1-almasrymina@google.c… === Picked up acks from Paolo, and addressed feedback from Paolo and Jakub. Changelog: - Fix issue in patch 4 where sockc_valid == false but err is overwritten. - Addressed nits. v13: https://lore.kernel.org/netdev/20250425204743.617260-1-almasrymina@google.c… === Changelog: - Fix unneeded error label pointed out by Christoph, and addressed nitpick. v12: https://lore.kernel.org/netdev/20250423031117.907681-1-almasrymina@google.c… ==== No changes in v12, just restored the selftests patch I accidentally dropped in v11 v11: https://lore.kernel.org/netdev/20250423031117.907681-1-almasrymina@google.c… ==== Addressed a couple of nits and collected Acked-by from Harshitha (thanks!) v10: https://lore.kernel.org/netdev/20250417231540.2780723-1-almasrymina@google.… ==== Addressed comments following conversations with Pavel, Stan, and Harshitha. Thank you guys for the reviews again. Overall minor changes: Changelog: - Check for !niov->pp in io_zcrx_recv_frag, just in case we end up with a TX niov in that path (Pavel). - Fix locking case in !netif_device_present (Jakub/Stan). v9: https://lore.kernel.org/netdev/20250415224756.152002-1-almasrymina@google.c… === Changelog: - Use priv->bindings list instead of sock_bindings_list. This was missed during the rebase as the bindings have been updated to use priv->bindings recently (thanks Stan!) v8: https://lore.kernel.org/netdev/20250308214045.1160445-1-almasrymina@google.… === Only address minor comments on V7 Changelog: - Use netdev locking instead of rtnl_locking to match rx path. - Now that iouring zcrx is in net-next, use NET_IOV_IOURING instead of NET_IOV_UNSPECIFIED. - Post send binding to net_devmem_dmabuf_bindings after it's been fully initialized (Stan). v7: https://lore.kernel.org/netdev/20250227041209.2031104-1-almasrymina@google.… === Changelog: - Check the dmabuf net_iov binding belongs to the device the TX is going out on. (Jakub) - Provide detailed inspection of callsites of __skb_frag_ref/skb_page_unref in patch 2's changelog (Jakub) v6: https://lore.kernel.org/netdev/20250222191517.743530-1-almasrymina@google.c… === v6 has no major changes. Addressed a few issues from Paolo and David, and collected Acks from Stan. Thank you everyone for the review! Changes: - retain behavior to process MSG_FASTOPEN even if the provided cmsg is invalid (Paolo). - Rework the freeing of tx_vec slightly (it now has its own err label). (Paolo). - Squash the commit that makes dmabuf unbinding scheduled work into the same one which implements the TX path so we don't run into future errors on bisecting (Paolo). - Fix/add comments to explain how dmabuf binding refcounting works (David). v5: https://lore.kernel.org/netdev/20250220020914.895431-1-almasrymina@google.c… === v5 has no major changes; it clears up the relatively minor issues pointed out to in v4, and rebases the series on top of net-next to resolve the conflict with a patch that raced to the tree. It also collects the review tags from v4. Changes: - Rebase to net-next - Fix issues in selftest (Stan). - Address comments in the devmem and netmem driver docs (Stan and Bagas) - Fix zerocopy_fill_skb_from_devmem return error code (Stan). v4: https://lore.kernel.org/netdev/20250203223916.1064540-1-almasrymina@google.… === v4 mainly addresses the critical driver support issue surfaced in v3 by Paolo and Stan. Drivers aiming to support netmem_tx should make sure not to pass the netmem dma-addrs to the dma-mapping APIs, as these dma-addrs may come from dma-bufs. Additionally other feedback from v3 is addressed. Major changes: - Add helpers to handle netmem dma-addrs. Add GVE support for netmem_tx. - Fix binding->tx_vec not being freed on error paths during the tx binding. - Add a minimal devmem_tx test to devmem.py. - Clean up everything obsolete from the cover letter (Paolo). v3: https://patchwork.kernel.org/project/netdevbpf/list/?series=929401&state=* === Address minor comments from RFCv2 and fix a few build warnings and ynl-regen issues. No major changes. RFC v2: https://patchwork.kernel.org/project/netdevbpf/list/?series=920056&state=* ======= RFC v2 addresses much of the feedback from RFC v1. I plan on sending something close to this as net-next reopens, sending it slightly early to get feedback if any. Major changes: -------------- - much improved UAPI as suggested by Stan. We now interpret the iov_base of the passed in iov from userspace as the offset into the dmabuf to send from. This removes the need to set iov.iov_base = NULL which may be confusing to users, and enables us to send multiple iovs in the same sendmsg() call. ncdevmem and the docs show a sample use of that. - Removed the duplicate dmabuf iov_iter in binding->iov_iter. I think this is good improvment as it was confusing to keep track of 2 iterators for the same sendmsg, and mistracking both iterators caused a couple of bugs reported in the last iteration that are now resolved with this streamlining. - Improved test coverage in ncdevmem. Now multiple sendmsg() are tested, and sending multiple iovs in the same sendmsg() is tested. - Fixed issue where dmabuf unmapping was happening in invalid context (Stan). ==================================================================== The TX path had been dropped from the Device Memory TCP patch series post RFCv1 [1], to make that series slightly easier to review. This series rebases the implementation of the TX path on top of the net_iov/netmem framework agreed upon and merged. The motivation for the feature is thoroughly described in the docs & cover letter of the original proposal, so I don't repeat the lengthy descriptions here, but they are available in [1]. Full outline on usage of the TX path is detailed in the documentation included with this series. Test example is available via the kselftest included in the series as well. The series is relatively small, as the TX path for this feature largely piggybacks on the existing MSG_ZEROCOPY implementation. Patch Overview: --------------- 1. Documentation & tests to give high level overview of the feature being added. 1. Add netmem refcounting needed for the TX path. 2. Devmem TX netlink API. 3. Devmem TX net stack implementation. 4. Make dma-buf unbinding scheduled work to handle TX cases where it gets freed from contexts where we can't sleep. 5. Add devmem TX documentation. 6. Add scaffolding enabling driver support for netmem_tx. Add helpers, driver feature flag, and docs to enable drivers to declare netmem_tx support. 7. Guard netmem_tx against being enabled against drivers that don't support it. 8. Add devmem_tx selftests. Add TX path to ncdevmem and add a test to devmem.py. Testing: -------- Testing is very similar to devmem TCP RX path. The ncdevmem test used for the RX path is now augemented with client functionality to test TX path. * Test Setup: Kernel: net-next with this RFC and memory provider API cherry-picked locally. Hardware: Google Cloud A3 VMs. NIC: GVE with header split & RSS & flow steering support. Performance results are not included with this version, unfortunately. I'm having issues running the dma-buf exporter driver against the upstream kernel on my test setup. The issues are specific to that dma-buf exporter and do not affect this patch series. I plan to follow up this series with perf fixes if the tests point to issues once they're up and running. Special thanks to Stan who took a stab at rebasing the TX implementation on top of the netmem/net_iov framework merged. Parts of his proposal [2] that are reused as-is are forked off into their own patches to give full credit. [1] https://lore.kernel.org/netdev/20240909054318.1809580-1-almasrymina@google.… [2] https://lore.kernel.org/netdev/20240913150913.1280238-2-sdf@fomichev.me/T/#… Cc: sdf(a)fomichev.me Cc: asml.silence(a)gmail.com Cc: dw(a)davidwei.uk Cc: Jamal Hadi Salim <jhs(a)mojatatu.com> Cc: Victor Nogueira <victor(a)mojatatu.com> Cc: Pedro Tammela <pctammela(a)mojatatu.com> Cc: Samiullah Khawaja <skhawaja(a)google.com> Cc: Kuniyuki Iwashima <kuniyu(a)amazon.com> Mina Almasry (8): netmem: add niov->type attribute to distinguish different net_iov types net: add get_netmem/put_netmem support net: devmem: Implement TX path net: add devmem TCP TX documentation net: enable driver support for netmem TX gve: add netmem TX support to GVE DQO-RDA mode net: check for driver support in netmem TX selftests: ncdevmem: Implement devmem TCP TX Stanislav Fomichev (1): net: devmem: TCP tx netlink api Documentation/netlink/specs/netdev.yaml | 12 + Documentation/networking/devmem.rst | 150 ++++++++- .../networking/net_cachelines/net_device.rst | 1 + Documentation/networking/netdev-features.rst | 5 + Documentation/networking/netmem.rst | 23 +- drivers/net/ethernet/google/gve/gve_main.c | 3 + drivers/net/ethernet/google/gve/gve_tx_dqo.c | 8 +- include/linux/netdevice.h | 2 + include/linux/skbuff.h | 17 +- include/linux/skbuff_ref.h | 4 +- include/net/netmem.h | 34 +- include/net/sock.h | 1 + include/uapi/linux/netdev.h | 1 + io_uring/zcrx.c | 3 +- net/core/datagram.c | 48 ++- net/core/dev.c | 34 +- net/core/devmem.c | 131 ++++++-- net/core/devmem.h | 83 ++++- net/core/netdev-genl-gen.c | 13 + net/core/netdev-genl-gen.h | 1 + net/core/netdev-genl.c | 80 ++++- net/core/skbuff.c | 48 ++- net/core/sock.c | 5 + net/ipv4/ip_output.c | 3 +- net/ipv4/tcp.c | 48 ++- net/ipv6/ip6_output.c | 3 +- net/vmw_vsock/virtio_transport_common.c | 5 +- tools/include/uapi/linux/netdev.h | 1 + .../selftests/drivers/net/hw/devmem.py | 26 +- .../selftests/drivers/net/hw/ncdevmem.c | 300 +++++++++++++++++- 30 files changed, 1007 insertions(+), 86 deletions(-) base-commit: 3e52667a9c328b3d1a1ddbbb6b8fbf63a217bda3 -- 2.49.0.987.g0cc8ee98dc-goog

5 months, 2 weeks

3
11
0 0

[PATCH v2] kunit: fix longest symbol length test

by Sergio González Collado

The kunit test that checks the longests symbol length [1], has triggered warnings in some pilelines when symbol prefixes are used [2]. The test is adjunsted to depend on !PREFIX_SYMBOLS and !CFI_CLANG as sujested in [3] [1] https://lore.kernel.org/rust-for-linux/CABVgOSm=5Q0fM6neBhxSbOUHBgNzmwf2V22… [2] https://lore.kernel.org/all/20250328112156.2614513-1-arnd@kernel.org/T/#u [3] https://lore.kernel.org/linux-kselftest/20250427200916.GA1661412@ax162/T/#t Signed-off-by: Sergio González Collado <sergio.collado(a)gmail.com> --- V1 -> V2: added dependency on !CFI_CLANG as suggested in [3], removed CONFIG_ prefix --- lib/Kconfig.debug | 2 +- lib/tests/longest_symbol_kunit.c | 3 +-- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index f9051ab610d5..5b33673d82da 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2885,7 +2885,7 @@ config FORTIFY_KUNIT_TEST config LONGEST_SYM_KUNIT_TEST tristate "Test the longest symbol possible" if !KUNIT_ALL_TESTS - depends on KUNIT && KPROBES + depends on KUNIT && KPROBES && !PREFIX_SYMBOLS && !CFI_CLANG default KUNIT_ALL_TESTS help Tests the longest symbol possible diff --git a/lib/tests/longest_symbol_kunit.c b/lib/tests/longest_symbol_kunit.c index e3c28ff1807f..b183fb92d1b2 100644 --- a/lib/tests/longest_symbol_kunit.c +++ b/lib/tests/longest_symbol_kunit.c @@ -3,8 +3,7 @@ * Test the longest symbol length. Execute with: * ./tools/testing/kunit/kunit.py run longest-symbol * --arch=x86_64 --kconfig_add CONFIG_KPROBES=y --kconfig_add CONFIG_MODULES=y - * --kconfig_add CONFIG_RETPOLINE=n --kconfig_add CONFIG_CFI_CLANG=n - * --kconfig_add CONFIG_MITIGATION_RETPOLINE=n + * --kconfig_add CONFIG_CPU_MITIGATIONS=n */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt base-commit: ebd297a2affadb6f6f4d2e5d975c1eda18ac762d -- 2.39.2

5 months, 2 weeks

3
2
0 0

[PATCH net-next] selftests: drv-net: ping: make sure the ping test restores checksum offload

by Jakub Kicinski

The ping test flips checksum offload on and off. Make sure the original value is restored if test fails. Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- CC: shuah(a)kernel.org CC: linux-kselftest(a)vger.kernel.org --- tools/testing/selftests/drivers/net/ping.py | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/tools/testing/selftests/drivers/net/ping.py b/tools/testing/selftests/drivers/net/ping.py index af8df2313a3b..e0f114612c1a 100755 --- a/tools/testing/selftests/drivers/net/ping.py +++ b/tools/testing/selftests/drivers/net/ping.py @@ -50,6 +50,16 @@ no_sleep=False cmd(f"echo {test_string} | socat -t 2 -u STDIN TCP:{cfg.remote_baddr}:{port}", shell=True) ksft_eq(nc.stdout.strip(), test_string) +def _schedule_checksum_reset(cfg, netnl) -> None: + features = ethtool(f"-k {cfg.ifname}", json=True) + setting = "" + for side in ["tx", "rx"]: + f = features[0][side + "-checksumming"] + if not f["fixed"]: + setting += " " + side + setting += " " + ("on" if f["requested"] or f["active"] else "off") + defer(ethtool, f" -K {cfg.ifname} " + setting) + def _set_offload_checksum(cfg, netnl, on) -> None: try: ethtool(f" -K {cfg.ifname} rx {on} tx {on} ") @@ -139,6 +149,7 @@ no_sleep=False def test_default_v4(cfg, netnl) -> None: cfg.require_ipver("4") + _schedule_checksum_reset(cfg, netnl) _set_offload_checksum(cfg, netnl, "off") _test_v4(cfg) _test_tcp(cfg) @@ -149,6 +160,7 @@ no_sleep=False def test_default_v6(cfg, netnl) -> None: cfg.require_ipver("6") + _schedule_checksum_reset(cfg, netnl) _set_offload_checksum(cfg, netnl, "off") _test_v6(cfg) _test_tcp(cfg) @@ -157,6 +169,7 @@ no_sleep=False _test_tcp(cfg) def test_xdp_generic_sb(cfg, netnl) -> None: + _schedule_checksum_reset(cfg, netnl) _set_xdp_generic_sb_on(cfg) _set_offload_checksum(cfg, netnl, "off") _test_v4(cfg) @@ -168,6 +181,7 @@ no_sleep=False _test_tcp(cfg) def test_xdp_generic_mb(cfg, netnl) -> None: + _schedule_checksum_reset(cfg, netnl) _set_xdp_generic_mb_on(cfg) _set_offload_checksum(cfg, netnl, "off") _test_v4(cfg) @@ -179,6 +193,7 @@ no_sleep=False _test_tcp(cfg) def test_xdp_native_sb(cfg, netnl) -> None: + _schedule_checksum_reset(cfg, netnl) _set_xdp_native_sb_on(cfg) _set_offload_checksum(cfg, netnl, "off") _test_v4(cfg) @@ -190,6 +205,7 @@ no_sleep=False _test_tcp(cfg) def test_xdp_native_mb(cfg, netnl) -> None: + _schedule_checksum_reset(cfg, netnl) _set_xdp_native_mb_on(cfg) _set_offload_checksum(cfg, netnl, "off") _test_v4(cfg) -- 2.49.0

5 months, 2 weeks

3
4
0 0

[PATCHv2 net-next 0/6] selftests: net: configure rp_filter in setup_ns

by Hangbin Liu

Some distributions enable rp_filter globally by default, which can interfere with various test cases. To address this, many tests explicitly disable rp_filter within their scripts. To avoid duplication and ensure consistent behavior across tests, this patch moves the rp_filter configuration into setup_ns, applied immediately after a new namespace is created. This change ensures that all namespace-based tests inherit the appropriate rp_filter settings, simplifying individual test scripts and improving maintainability. v2: fix srv6_hl2encap_red_l2vpn_test.sh test failure (Jakub Kicinski) Hangbin Liu (6): selftests: net: disable rp_filter after namespace initialization selftests: net: remove redundant rp_filter configuration selftests: net: use setup_ns for bareudp testing selftests: net: use setup_ns for SRv6 tests and remove rp_filter configuration selftests: netfilter: remove rp_filter configuration selftests: mptcp: remove rp_filter configuration tools/testing/selftests/net/bareudp.sh | 49 ++--------- tools/testing/selftests/net/fib_rule_tests.sh | 3 - tools/testing/selftests/net/fib_tests.sh | 3 - tools/testing/selftests/net/icmp_redirect.sh | 2 - tools/testing/selftests/net/lib.sh | 2 + .../testing/selftests/net/mptcp/mptcp_lib.sh | 2 - .../selftests/net/netfilter/br_netfilter.sh | 3 - .../selftests/net/netfilter/bridge_brouter.sh | 2 - .../selftests/net/netfilter/conntrack_vrf.sh | 3 - tools/testing/selftests/net/netfilter/ipvs.sh | 6 -- .../selftests/net/netfilter/nft_fib.sh | 2 - .../selftests/net/netfilter/nft_nat_zones.sh | 2 - .../testing/selftests/net/netfilter/rpath.sh | 18 ++-- .../selftests/net/srv6_end_dt46_l3vpn_test.sh | 5 -- .../selftests/net/srv6_end_dt4_l3vpn_test.sh | 5 -- .../net/srv6_end_next_csid_l3vpn_test.sh | 77 ++++------------- .../net/srv6_end_x_next_csid_l3vpn_test.sh | 83 +++++-------------- .../net/srv6_hencap_red_l3vpn_test.sh | 74 ++++------------- .../net/srv6_hl2encap_red_l2vpn_test.sh | 83 +++++-------------- 19 files changed, 90 insertions(+), 334 deletions(-) -- 2.46.0

5 months, 2 weeks

4
11
0 0

[PATCH 0/6] mm/damon: minor fixups and improvements for code, tests, and documents

by SeongJae Park

Yet another batch of miscellaneous DAMON changes. Fix and improve minor problems in code, tests and documents. SeongJae Park (6): mm/damon/core: warn and fix nr_accesses[_bp] corruption mm/damon/sysfs-schemes: fix wrong comment on damons_sysfs_quota_goal_metric_strs mm/damon/paddr: remove unused variable, folio_list, in damon_pa_stat() mm/damon/tests/core-kunit: add a test for damos_set_filters_default_reject() selftests/damon/_damon_sysfs: read tried regions directories in order Docs/damon: update titles and brief introductions to explain DAMOS Documentation/admin-guide/mm/damon/index.rst | 11 ++- Documentation/mm/damon/index.rst | 6 +- mm/damon/core.c | 14 ++++ mm/damon/paddr.c | 1 - mm/damon/sysfs-schemes.c | 2 +- mm/damon/tests/core-kunit.h | 70 +++++++++++++++++++ tools/testing/selftests/damon/_damon_sysfs.py | 5 ++ 7 files changed, 98 insertions(+), 11 deletions(-) base-commit: fb227aa50d133236ef02a71dd9e3d510f4fad42f -- 2.39.5

5 months, 2 weeks

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[RESEND PATCH] selftests/bpf: Fix bpf selftest build warning

by Saket Kumar Bhaskar

On linux-next, build for bpf selftest displays a warning: Warning: Kernel ABI header at 'tools/include/uapi/linux/if_xdp.h' differs from latest version at 'include/uapi/linux/if_xdp.h'. Commit 8066e388be48 ("net: add UAPI to the header guard in various network headers") changed the header guard from _LINUX_IF_XDP_H to _UAPI_LINUX_IF_XDP_H in include/uapi/linux/if_xdp.h. To resolve the warning, update tools/include/uapi/linux/if_xdp.h to align with the changes in include/uapi/linux/if_xdp.h Fixes: 8066e388be48 ("net: add UAPI to the header guard in various network headers") Reported-by: Venkat Rao Bagalkote <venkat88(a)linux.ibm.com> Closes: https://lore.kernel.org/all/c2bc466d-dff2-4d0d-a797-9af7f676c065@linux.ibm.… Tested-by: Venkat Rao Bagalkote <venkat88(a)linux.ibm.com> Signed-off-by: Saket Kumar Bhaskar <skb99(a)linux.ibm.com> --- [RESEND]: - Added Fixes and Tested-by tag. - Added Greg as receipent for driver-core tree. Original patch: https://lore.kernel.org/all/20250509123802.695574-1-skb99@linux.ibm.com/ tools/include/uapi/linux/if_xdp.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/include/uapi/linux/if_xdp.h b/tools/include/uapi/linux/if_xdp.h index 42869770776e..44f2bb93e7e6 100644 --- a/tools/include/uapi/linux/if_xdp.h +++ b/tools/include/uapi/linux/if_xdp.h @@ -7,8 +7,8 @@ * Magnus Karlsson <magnus.karlsson(a)intel.com> */ -#ifndef _LINUX_IF_XDP_H -#define _LINUX_IF_XDP_H +#ifndef _UAPI_LINUX_IF_XDP_H +#define _UAPI_LINUX_IF_XDP_H #include <linux/types.h> @@ -180,4 +180,4 @@ struct xdp_desc { /* TX packet carries valid metadata. */ #define XDP_TX_METADATA (1 << 1) -#endif /* _LINUX_IF_XDP_H */ +#endif /* _UAPI_LINUX_IF_XDP_H */ -- 2.43.5

5 months, 2 weeks

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[PATCH v2] KVM: SEV: Disable SEV-SNP support on initialization failure

by Ashish Kalra

From: Ashish Kalra <ashish.kalra(a)amd.com> During platform init, SNP initialization may fail for several reasons, such as firmware command failures and incompatible versions. However, the KVM capability may continue to advertise support for it. The platform may have SNP enabled but if SNP_INIT fails then SNP is not supported by KVM. During KVM module initialization query the SNP platform status to obtain the SNP initialization state and use it as an additional condition to determine support for SEV-SNP. Co-developed-by: Sean Christopherson <seanjc(a)google.com> Signed-off-by: Sean Christopherson <seanjc(a)google.com> Co-developed-by: Pratik R. Sampat <prsampat(a)amd.com> Signed-off-by: Pratik R. Sampat <prsampat(a)amd.com> Signed-off-by: Ashish Kalra <ashish.kalra(a)amd.com> --- arch/x86/kvm/svm/sev.c | 44 +++++++++++++++++++++++++++++++++--------- 1 file changed, 35 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index dea9480b9ff6..f7d343ab9acd 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2935,6 +2935,33 @@ void __init sev_set_cpu_caps(void) } } +static bool is_sev_snp_initialized(void) +{ + struct sev_user_data_snp_status *status; + struct sev_data_snp_addr buf; + bool initialized = false; + int error, ret; + + status = snp_alloc_firmware_page(GFP_KERNEL | __GFP_ZERO); + if (!status) + return false; + + buf.address = __psp_pa(status); + ret = sev_do_cmd(SEV_CMD_SNP_PLATFORM_STATUS, &buf, &error); + if (ret) { + pr_err("SEV: SNP_PLATFORM_STATUS failed ret=%d, fw_error=%d (%#x)\n", + ret, error, error); + goto out; + } + + initialized = !!status->state; + +out: + snp_free_firmware_page(status); + + return initialized; +} + void __init sev_hardware_setup(void) { unsigned int eax, ebx, ecx, edx, sev_asid_count, sev_es_asid_count; @@ -3039,6 +3066,14 @@ void __init sev_hardware_setup(void) sev_snp_supported = sev_snp_enabled && cc_platform_has(CC_ATTR_HOST_SEV_SNP); out: + if (sev_enabled) { + init_args.probe = true; + if (sev_platform_init(&init_args)) + sev_supported = sev_es_supported = sev_snp_supported = false; + else if (sev_snp_supported) + sev_snp_supported = is_sev_snp_initialized(); + } + if (boot_cpu_has(X86_FEATURE_SEV)) pr_info("SEV %s (ASIDs %u - %u)\n", sev_supported ? min_sev_asid <= max_sev_asid ? "enabled" : @@ -3065,15 +3100,6 @@ void __init sev_hardware_setup(void) sev_supported_vmsa_features = 0; if (sev_es_debug_swap_enabled) sev_supported_vmsa_features |= SVM_SEV_FEAT_DEBUG_SWAP; - - if (!sev_enabled) - return; - - /* - * Do both SNP and SEV initialization at KVM module load. - */ - init_args.probe = true; - sev_platform_init(&init_args); } void sev_hardware_unsetup(void) -- 2.34.1

5 months, 2 weeks

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[PATCH] selftests/mincore: Added comment for minicore test

by Suresh

Signed-off-by: Suresh <suresh.k.chandrappa(a)gmail.com> --- tools/testing/selftests/mincore/mincore_selftest.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/mincore/mincore_selftest.c b/tools/testing/selftests/mincore/mincore_selftest.c index 17ed3e9917ca..c4f0d21f7678 100644 --- a/tools/testing/selftests/mincore/mincore_selftest.c +++ b/tools/testing/selftests/mincore/mincore_selftest.c @@ -146,6 +146,11 @@ TEST(check_huge_pages) page_size = sysconf(_SC_PAGESIZE); errno = 0; + /* + * Attempt to map a huge page + * MAP_HUGETLB flag requests a huge page allocation + * Size is normal page_size, but kernel uses huge page backing + */ addr = mmap(NULL, page_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0); -- 2.45.2

5 months, 2 weeks

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[PATCH bpf-next v5 0/5] Replace CONFIG_DMABUF_SYSFS_STATS with BPF

by T.J. Mercier

Until CONFIG_DMABUF_SYSFS_STATS was added [1] it was only possible to perform per-buffer accounting with debugfs which is not suitable for production environments. Eventually we discovered the overhead with per-buffer sysfs file creation/removal was significantly impacting allocation and free times, and exacerbated kernfs lock contention. [2] dma_buf_stats_setup() is responsible for 39% of single-page buffer creation duration, or 74% of single-page dma_buf_export() duration when stressing dmabuf allocations and frees. I prototyped a change from per-buffer to per-exporter statistics with a RCU protected list of exporter allocations that accommodates most (but not all) of our use-cases and avoids almost all of the sysfs overhead. While that adds less overhead than per-buffer sysfs, and less even than the maintenance of the dmabuf debugfs_list, it's still *additional* overhead on top of the debugfs_list and doesn't give us per-buffer info. This series uses the existing dmabuf debugfs_list to implement a BPF dmabuf iterator, which adds no overhead to buffer allocation/free and provides per-buffer info. The list has been moved outside of CONFIG_DEBUG_FS scope so that it is always populated. The BPF program loaded by userspace that extracts per-buffer information gets to define its own interface which avoids the lack of ABI stability with debugfs. This will allow us to replace our use of CONFIG_DMABUF_SYSFS_STATS, and the plan is to remove it from the kernel after the next longterm stable release. [1] https://lore.kernel.org/linux-media/20201210044400.1080308-1-hridya@google.… [2] https://lore.kernel.org/all/20220516171315.2400578-1-tjmercier@google.com v1: https://lore.kernel.org/all/20250414225227.3642618-1-tjmercier@google.com v1 -> v2: Make the DMA buffer list independent of CONFIG_DEBUG_FS per Christian König Add CONFIG_DMA_SHARED_BUFFER check to kernel/bpf/Makefile per kernel test robot Use BTF_ID_LIST_SINGLE instead of BTF_ID_LIST_GLOBAL_SINGLE per Song Liu Fixup comment style, mixing code/declarations, and use ASSERT_OK_FD in selftest per Song Liu Add BPF_ITER_RESCHED feature to bpf_dmabuf_reg_info per Alexei Starovoitov Add open-coded iterator and selftest per Alexei Starovoitov Add a second test buffer from the system dmabuf heap to selftests Use the BPF program we'll use in production for selftest per Alexei Starovoitov https://r.android.com/c/platform/system/bpfprogs/+/3616123/2/dmabufIter.c https://r.android.com/c/platform/system/memory/libmeminfo/+/3614259/1/libdm… v2: https://lore.kernel.org/all/20250504224149.1033867-1-tjmercier@google.com v2 -> v3: Rebase onto bpf-next/master Move get_next_dmabuf() into drivers/dma-buf/dma-buf.c, along with the new get_first_dmabuf(). This avoids having to expose the dmabuf list and mutex to the rest of the kernel, and keeps the dmabuf mutex operations near each other in the same file. (Christian König) Add Christian's RB to dma-buf: Rename debugfs symbols Drop RFC: dma-buf: Remove DMA-BUF statistics v3: https://lore.kernel.org/all/20250507001036.2278781-1-tjmercier@google.com v3 -> v4: Fix selftest BPF program comment style (not kdoc) per Alexei Starovoitov Fix dma-buf.c kdoc comment style per Alexei Starovoitov Rename get_first_dmabuf / get_next_dmabuf to dma_buf_iter_begin / dma_buf_iter_next per Christian König Add Christian's RB to bpf: Add dmabuf iterator v4: https://lore.kernel.org/all/20250508182025.2961555-1-tjmercier@google.com v4 -> v5: Add Christian's Acks to all patches Add Song Liu's Acks Move BTF_ID_LIST_SINGLE and DEFINE_BPF_ITER_FUNC closer to usage per Song Liu Fix open-coded iterator comment style per Song Liu Move iterator termination check to its own subtest per Song Liu Rework selftest buffer creation per Song Liu Fix spacing in sanitize_string per BPF CI T.J. Mercier (5): dma-buf: Rename debugfs symbols bpf: Add dmabuf iterator bpf: Add open coded dmabuf iterator selftests/bpf: Add test for dmabuf_iter selftests/bpf: Add test for open coded dmabuf_iter drivers/dma-buf/dma-buf.c | 98 +++++-- include/linux/dma-buf.h | 4 +- kernel/bpf/Makefile | 3 + kernel/bpf/dmabuf_iter.c | 150 ++++++++++ kernel/bpf/helpers.c | 5 + .../testing/selftests/bpf/bpf_experimental.h | 5 + tools/testing/selftests/bpf/config | 3 + .../selftests/bpf/prog_tests/dmabuf_iter.c | 276 ++++++++++++++++++ .../testing/selftests/bpf/progs/dmabuf_iter.c | 91 ++++++ 9 files changed, 613 insertions(+), 22 deletions(-) create mode 100644 kernel/bpf/dmabuf_iter.c create mode 100644 tools/testing/selftests/bpf/prog_tests/dmabuf_iter.c create mode 100644 tools/testing/selftests/bpf/progs/dmabuf_iter.c base-commit: 43745d11bfd9683abdf08ad7a5cc403d6a9ffd15 -- 2.49.0.1045.g170613ef41-goog

5 months, 2 weeks

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[PATCH v6 00/14] riscv: add SBI FWFT misaligned exception delegation support

by Clément Léger

The SBI Firmware Feature extension allows the S-mode to request some specific features (either hardware or software) to be enabled. This series uses this extension to request misaligned access exception delegation to S-mode in order to let the kernel handle it. It also adds support for the KVM FWFT SBI extension based on the misaligned access handling infrastructure. FWFT SBI extension is part of the SBI V3.0 specifications [1]. It can be tested using the qemu provided at [2] which contains the series from [3]. Upstream kvm-unit-tests can be used inside kvm to tests the correct delegation of misaligned exceptions. Upstream OpenSBI can be used. Note: Since SBI V3.0 is not yet ratified, FWFT extension API is split between interface only and implementation, allowing to pick only the interface which do not have hard dependencies on SBI. The tests can be run using the kselftest from series [4]. $ qemu-system-riscv64 \ -cpu rv64,trap-misaligned-access=true,v=true \ -M virt \ -m 1024M \ -bios fw_dynamic.bin \ -kernel Image ... # ./misaligned TAP version 13 1..23 # Starting 23 tests from 1 test cases. # RUN global.gp_load_lh ... # OK global.gp_load_lh ok 1 global.gp_load_lh # RUN global.gp_load_lhu ... # OK global.gp_load_lhu ok 2 global.gp_load_lhu # RUN global.gp_load_lw ... # OK global.gp_load_lw ok 3 global.gp_load_lw # RUN global.gp_load_lwu ... # OK global.gp_load_lwu ok 4 global.gp_load_lwu # RUN global.gp_load_ld ... # OK global.gp_load_ld ok 5 global.gp_load_ld # RUN global.gp_load_c_lw ... # OK global.gp_load_c_lw ok 6 global.gp_load_c_lw # RUN global.gp_load_c_ld ... # OK global.gp_load_c_ld ok 7 global.gp_load_c_ld # RUN global.gp_load_c_ldsp ... # OK global.gp_load_c_ldsp ok 8 global.gp_load_c_ldsp # RUN global.gp_load_sh ... # OK global.gp_load_sh ok 9 global.gp_load_sh # RUN global.gp_load_sw ... # OK global.gp_load_sw ok 10 global.gp_load_sw # RUN global.gp_load_sd ... # OK global.gp_load_sd ok 11 global.gp_load_sd # RUN global.gp_load_c_sw ... # OK global.gp_load_c_sw ok 12 global.gp_load_c_sw # RUN global.gp_load_c_sd ... # OK global.gp_load_c_sd ok 13 global.gp_load_c_sd # RUN global.gp_load_c_sdsp ... # OK global.gp_load_c_sdsp ok 14 global.gp_load_c_sdsp # RUN global.fpu_load_flw ... # OK global.fpu_load_flw ok 15 global.fpu_load_flw # RUN global.fpu_load_fld ... # OK global.fpu_load_fld ok 16 global.fpu_load_fld # RUN global.fpu_load_c_fld ... # OK global.fpu_load_c_fld ok 17 global.fpu_load_c_fld # RUN global.fpu_load_c_fldsp ... # OK global.fpu_load_c_fldsp ok 18 global.fpu_load_c_fldsp # RUN global.fpu_store_fsw ... # OK global.fpu_store_fsw ok 19 global.fpu_store_fsw # RUN global.fpu_store_fsd ... # OK global.fpu_store_fsd ok 20 global.fpu_store_fsd # RUN global.fpu_store_c_fsd ... # OK global.fpu_store_c_fsd ok 21 global.fpu_store_c_fsd # RUN global.fpu_store_c_fsdsp ... # OK global.fpu_store_c_fsdsp ok 22 global.fpu_store_c_fsdsp # RUN global.gen_sigbus ... [12797.988647] misaligned[618]: unhandled signal 7 code 0x1 at 0x0000000000014dc0 in misaligned[4dc0,10000+76000] [12797.988990] CPU: 0 UID: 0 PID: 618 Comm: misaligned Not tainted 6.13.0-rc6-00008-g4ec4468967c9-dirty #51 [12797.989169] Hardware name: riscv-virtio,qemu (DT) [12797.989264] epc : 0000000000014dc0 ra : 0000000000014d00 sp : 00007fffe165d100 [12797.989407] gp : 000000000008f6e8 tp : 0000000000095760 t0 : 0000000000000008 [12797.989544] t1 : 00000000000965d8 t2 : 000000000008e830 s0 : 00007fffe165d160 [12797.989692] s1 : 000000000000001a a0 : 0000000000000000 a1 : 0000000000000002 [12797.989831] a2 : 0000000000000000 a3 : 0000000000000000 a4 : ffffffffdeadbeef [12797.989964] a5 : 000000000008ef61 a6 : 626769735f6e0000 a7 : fffffffffffff000 [12797.990094] s2 : 0000000000000001 s3 : 00007fffe165d838 s4 : 00007fffe165d848 [12797.990238] s5 : 000000000000001a s6 : 0000000000010442 s7 : 0000000000010200 [12797.990391] s8 : 000000000000003a s9 : 0000000000094508 s10: 0000000000000000 [12797.990526] s11: 0000555567460668 t3 : 00007fffe165d070 t4 : 00000000000965d0 [12797.990656] t5 : fefefefefefefeff t6 : 0000000000000073 [12797.990756] status: 0000000200004020 badaddr: 000000000008ef61 cause: 0000000000000006 [12797.990911] Code: 8793 8791 3423 fcf4 3783 fc84 c737 dead 0713 eef7 (c398) 0001 # OK global.gen_sigbus ok 23 global.gen_sigbus # PASSED: 23 / 23 tests passed. # Totals: pass:23 fail:0 xfail:0 xpass:0 skip:0 error:0 With kvm-tools: # lkvm run -k sbi.flat -m 128 Info: # lkvm run -k sbi.flat -m 128 -c 1 --name guest-97 Info: Removed ghost socket file "/root/.lkvm//guest-97.sock". ########################################################################## # kvm-unit-tests ########################################################################## ... [test messages elided] PASS: sbi: fwft: FWFT extension probing no error PASS: sbi: fwft: get/set reserved feature 0x6 error == SBI_ERR_DENIED PASS: sbi: fwft: get/set reserved feature 0x3fffffff error == SBI_ERR_DENIED PASS: sbi: fwft: get/set reserved feature 0x80000000 error == SBI_ERR_DENIED PASS: sbi: fwft: get/set reserved feature 0xbfffffff error == SBI_ERR_DENIED PASS: sbi: fwft: misaligned_deleg: Get misaligned deleg feature no error PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature invalid value error PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature invalid value error PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value no error PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value 0 PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value no error PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value 1 PASS: sbi: fwft: misaligned_deleg: Verify misaligned load exception trap in supervisor SUMMARY: 50 tests, 2 unexpected failures, 12 skipped This series is available at [5]. Link: https://github.com/riscv-non-isa/riscv-sbi-doc/releases/download/vv3.0-rc2/… [1] Link: https://github.com/rivosinc/qemu/tree/dev/cleger/misaligned [2] Link: https://lore.kernel.org/all/20241211211933.198792-3-fkonrad@amd.com/T/ [3] Link: https://lore.kernel.org/linux-riscv/20250414123543.1615478-1-cleger@rivosin… [4] Link: https://github.com/rivosinc/linux/tree/dev/cleger/fwft [5] --- V6: - Rename FWFT interface to remove "_local" - Fix test for MEDELEG values in KVM FWFT support - Add __init for unaligned_access_init() - Rebased on master V5: - Return ERANGE as mapping for SBI_ERR_BAD_RANGE - Removed unused sbi_fwft_get() - Fix kernel for sbi_fwft_local_set_cpumask() - Fix indentation for sbi_fwft_local_set() - Remove spurious space in kvm_sbi_fwft_ops. - Rebased on origin/master - Remove fixes commits and sent them as a separate series [4] V4: - Check SBI version 3.0 instead of 2.0 for FWFT presence - Use long for kvm_sbi_fwft operation return value - Init KVM sbi extension even if default_disabled - Remove revert_on_fail parameter for sbi_fwft_feature_set(). - Fix comments for sbi_fwft_set/get() - Only handle local features (there are no globals yet in the spec) - Add new SBI errors to sbi_err_map_linux_errno() V3: - Added comment about kvm sbi fwft supported/set/get callback requirements - Move struct kvm_sbi_fwft_feature in kvm_sbi_fwft.c - Add a FWFT interface V2: - Added Kselftest for misaligned testing - Added get_user() usage instead of __get_user() - Reenable interrupt when possible in misaligned access handling - Document that riscv supports unaligned-traps - Fix KVM extension state when an init function is present - Rework SBI misaligned accesses trap delegation code - Added support for CPU hotplugging - Added KVM SBI reset callback - Added reset for KVM SBI FWFT lock - Return SBI_ERR_DENIED_LOCKED when LOCK flag is set Clément Léger (14): riscv: sbi: add Firmware Feature (FWFT) SBI extensions definitions riscv: sbi: remove useless parenthesis riscv: sbi: add new SBI error mappings riscv: sbi: add FWFT extension interface riscv: sbi: add SBI FWFT extension calls riscv: misaligned: request misaligned exception from SBI riscv: misaligned: use on_each_cpu() for scalar misaligned access probing riscv: misaligned: use correct CONFIG_ ifdef for misaligned_access_speed riscv: misaligned: move emulated access uniformity check in a function riscv: misaligned: add a function to check misalign trap delegability RISC-V: KVM: add SBI extension init()/deinit() functions RISC-V: KVM: add SBI extension reset callback RISC-V: KVM: add support for FWFT SBI extension RISC-V: KVM: add support for SBI_FWFT_MISALIGNED_DELEG arch/riscv/include/asm/cpufeature.h | 8 +- arch/riscv/include/asm/kvm_host.h | 5 +- arch/riscv/include/asm/kvm_vcpu_sbi.h | 12 + arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h | 29 +++ arch/riscv/include/asm/sbi.h | 60 +++++ arch/riscv/include/uapi/asm/kvm.h | 1 + arch/riscv/kernel/sbi.c | 81 ++++++- arch/riscv/kernel/traps_misaligned.c | 110 ++++++++- arch/riscv/kernel/unaligned_access_speed.c | 8 +- arch/riscv/kvm/Makefile | 1 + arch/riscv/kvm/vcpu.c | 7 +- arch/riscv/kvm/vcpu_sbi.c | 54 +++++ arch/riscv/kvm/vcpu_sbi_fwft.c | 252 +++++++++++++++++++++ arch/riscv/kvm/vcpu_sbi_sta.c | 3 +- 14 files changed, 613 insertions(+), 18 deletions(-) create mode 100644 arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h create mode 100644 arch/riscv/kvm/vcpu_sbi_fwft.c -- 2.49.0

5 months, 2 weeks

6
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[PATCH bpf-next 0/4] bpf: Allow get_func_[arg|arg_cnt] helpers in raw tracepoint programs

by KaFai Wan

hi, We can use get_func_[arg|arg_cnt] helpers in fentry/fexit/fmod_ret programs currently[1]. But they can't be used in raw_tp/tp_btf programs. Adding support to use get_func_[arg|arg_cnt] helpers in raw_tp/tp_btf programs. Adding BPF_PROG_TEST_RUN for tp_btf. Add selftests to check them. Thanks, KaFai [1] https://lore.kernel.org/bpf/20211208193245.172141-1-jolsa@kernel.org/ --- KaFai Wan (4): bpf: Allow get_func_[arg|arg_cnt] helpers in raw tracepoint programs bpf: Enable BPF_PROG_TEST_RUN for tp_btf selftests/bpf: Add raw_tp_test_run for tp_btf selftests/bpf: Add tests for get_func_[arg|arg_cnt] helpers in raw tracepoint programs kernel/trace/bpf_trace.c | 17 +++++-- net/bpf/test_run.c | 16 +++---- .../bpf/prog_tests/raw_tp_get_func_args.c | 48 +++++++++++++++++++ .../bpf/prog_tests/raw_tp_test_run.c | 18 ++++++- .../bpf/progs/test_raw_tp_get_func_args.c | 47 ++++++++++++++++++ .../bpf/progs/test_raw_tp_test_run.c | 16 +++++-- 6 files changed, 146 insertions(+), 16 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/raw_tp_get_func_args.c create mode 100644 tools/testing/selftests/bpf/progs/test_raw_tp_get_func_args.c -- 2.43.0

5 months, 2 weeks

5
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[PATCH v2 00/19] iommufd: Add VIOMMU infrastructure (Part-1)

by Nicolin Chen

This series introduces a new VIOMMU infrastructure and related ioctls. IOMMUFD has been using the HWPT infrastructure for all cases, including a nested IO page table support. Yet, there're limitations for an HWPT-based structure to support some advanced HW-accelerated features, such as CMDQV on NVIDIA Grace, and HW-accelerated vIOMMU on AMD. Even for a multi-IOMMU environment, it is not straightforward for nested HWPTs to share the same parent HWPT (stage-2 IO pagetable), with the HWPT infrastructure alone. The new VIOMMU object is an additional layer, between the nested HWPT and its parent HWPT, to give to both the IOMMUFD core and an IOMMU driver an additional structure to support HW-accelerated feature: ---------------------------- ---------------- | | paging_hwpt0 | | hwpt_nested0 |--->| viommu0 ------------------ ---------------- | | HW-accel feats | ---------------------------- On a multi-IOMMU system, the VIOMMU object can be instanced to the number of vIOMMUs in a guest VM, while holding the same parent HWPT to share the stage-2 IO pagetable. Each VIOMMU then just need to only allocate its own VMID to attach the shared stage-2 IO pagetable to the physical IOMMU: ---------------------------- ---------------- | | paging_hwpt0 | | hwpt_nested0 |--->| viommu0 ------------------ ---------------- | | VMID0 | ---------------------------- ---------------------------- ---------------- | | paging_hwpt0 | | hwpt_nested1 |--->| viommu1 ------------------ ---------------- | | VMID1 | ---------------------------- As an initial part-1, add ioctls to support a VIOMMU-based invalidation: IOMMUFD_CMD_VIOMMU_ALLOC to allocate a VIOMMU object IOMMUFD_CMD_VIOMMU_SET/UNSET_VDEV_ID to set/clear device's virtual ID (Resue IOMMUFD_CMD_HWPT_INVALIDATE for a VIOMMU object to flush cache by a given driver data) Worth noting that the VDEV_ID is for a per-VIOMMU device list for drivers to look up the device's physical instance from its virtual ID in a VM. It is essential for a VIOMMU-based invalidation where the request contains a device's virtual ID for its device cache flush, e.g. ATC invalidation. As for the implementation of the series, add an IOMMU_VIOMMU_TYPE_DEFAULT type for a core-allocated-core-managed VIOMMU object, allowing drivers to simply hook a default viommu ops for viommu-based invalidation alone. And provide some viommu helpers to drivers for VDEV_ID translation and parent domain lookup. Add VIOMMU invalidation support to ARM SMMUv3 driver for a real world use case. This adds supports of arm-smmuv-v3's CMDQ_OP_ATC_INV and CMDQ_OP_CFGI_CD/ALL commands, supplementing HWPT-based invalidations. In the future, drivers will also be able to choose a driver-managed type to hold its own structure by adding a new type to enum iommu_viommu_type. More VIOMMU-based structures and ioctls will be introduced in part-2/3 to support a driver-managed VIOMMU, e.g. VQUEUE object for a HW accelerated queue, VIRQ (or VEVENT) object for IRQ injections. Although we repurposed the VIOMMU object from an earlier RFC discussion, for a referece: https://lore.kernel.org/all/cover.1712978212.git.nicolinc@nvidia.com/ This series is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_viommu_p1-v2 Paring QEMU branch for testing: https://github.com/nicolinc/qemu/commits/wip/for_iommufd_viommu_p1-v2 Changelog v2 * Limited vdev_id to one per idev * Added a rw_sem to protect the vdev_id list * Reworked driver-level APIs with proper lockings * Added a new viommu_api file for IOMMUFD_DRIVER config * Dropped useless iommu_dev point from the viommu structure * Added missing index numnbers to new types in the uAPI header * Dropped IOMMU_VIOMMU_INVALIDATE uAPI; Instead, reuse the HWPT one * Reworked mock_viommu_cache_invalidate() using the new iommu helper * Reordered details of set/unset_vdev_id handlers for proper lockings * Added arm_smmu_cache_invalidate_user patch from Jason's nesting series v1 https://lore.kernel.org/all/cover.1723061377.git.nicolinc@nvidia.com/ Thanks! Nicolin Jason Gunthorpe (3): iommu: Add iommu_copy_struct_from_full_user_array helper iommu/arm-smmu-v3: Allow ATS for IOMMU_DOMAIN_NESTED iommu/arm-smmu-v3: Update comments about ATS and bypass Nicolin Chen (16): iommufd: Reorder struct forward declarations iommufd/viommu: Add IOMMUFD_OBJ_VIOMMU and IOMMU_VIOMMU_ALLOC ioctl iommu: Pass in a viommu pointer to domain_alloc_user op iommufd: Allow pt_id to carry viommu_id for IOMMU_HWPT_ALLOC iommufd/selftest: Add IOMMU_VIOMMU_ALLOC test coverage iommufd/viommu: Add IOMMU_VIOMMU_SET/UNSET_VDEV_ID ioctl iommufd/selftest: Add IOMMU_VIOMMU_SET/UNSET_VDEV_ID test coverage iommufd/viommu: Add cache_invalidate for IOMMU_VIOMMU_TYPE_DEFAULT iommufd: Allow hwpt_id to carry viommu_id for IOMMU_HWPT_INVALIDATE iommufd/viommu: Add vdev_id helpers for IOMMU drivers iommufd/selftest: Add mock_viommu_invalidate_user op iommufd/selftest: Add IOMMU_TEST_OP_DEV_CHECK_CACHE test command iommufd/selftest: Add VIOMMU coverage for IOMMU_HWPT_INVALIDATE ioctl iommufd/viommu: Add iommufd_viommu_to_parent_domain helper iommu/arm-smmu-v3: Add arm_smmu_cache_invalidate_user iommu/arm-smmu-v3: Add arm_smmu_viommu_cache_invalidate drivers/iommu/amd/iommu.c | 1 + drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 218 ++++++++++++++- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 3 + drivers/iommu/intel/iommu.c | 1 + drivers/iommu/iommufd/Makefile | 5 +- drivers/iommu/iommufd/device.c | 12 + drivers/iommu/iommufd/hw_pagetable.c | 59 +++- drivers/iommu/iommufd/iommufd_private.h | 37 +++ drivers/iommu/iommufd/iommufd_test.h | 30 ++ drivers/iommu/iommufd/main.c | 12 + drivers/iommu/iommufd/selftest.c | 101 ++++++- drivers/iommu/iommufd/viommu.c | 196 +++++++++++++ drivers/iommu/iommufd/viommu_api.c | 53 ++++ include/linux/iommu.h | 56 +++- include/linux/iommufd.h | 51 +++- include/uapi/linux/iommufd.h | 117 +++++++- tools/testing/selftests/iommu/iommufd.c | 259 +++++++++++++++++- tools/testing/selftests/iommu/iommufd_utils.h | 126 +++++++++ 18 files changed, 1299 insertions(+), 38 deletions(-) create mode 100644 drivers/iommu/iommufd/viommu.c create mode 100644 drivers/iommu/iommufd/viommu_api.c -- 2.43.0

5 months, 2 weeks

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[PATCH v2 0/5] riscv: misaligned: fix interruptible context and add tests

by Clément Léger

This series fixes misaligned access handling when in non interruptible context by reenabling interrupts when possible. A previous commit changed raw_copy_from_user() with copy_from_user() which enables page faulting and thus can sleep. While correct, a warning is now triggered due to being called in an invalid context (sleeping in non-interruptible). This series fixes that problem by factorizing misaligned load/store entry in a single function than reenables interrupt if the interrupted context had interrupts enabled. In order for misaligned handling problems to be caught sooner, add a kselftest for all the currently supported instructions . Note: these commits were actually part of another larger series for misaligned request delegation but was split since it isn't directly required. V2: - Use an array of struct to simplify misaligned load/store selection - Revert use of irqentry_enter()/exit() to irqentry_nmi_enter() for kernel space. Clément Léger (5): riscv: misaligned: factorize trap handling riscv: misaligned: enable IRQs while handling misaligned accesses riscv: misaligned: use get_user() instead of __get_user() Documentation/sysctl: add riscv to unaligned-trap supported archs selftests: riscv: add misaligned access testing Documentation/admin-guide/sysctl/kernel.rst | 4 +- arch/riscv/kernel/traps.c | 64 +++-- arch/riscv/kernel/traps_misaligned.c | 2 +- .../selftests/riscv/misaligned/.gitignore | 1 + .../selftests/riscv/misaligned/Makefile | 12 + .../selftests/riscv/misaligned/common.S | 33 +++ .../testing/selftests/riscv/misaligned/fpu.S | 180 +++++++++++++ tools/testing/selftests/riscv/misaligned/gp.S | 103 +++++++ .../selftests/riscv/misaligned/misaligned.c | 254 ++++++++++++++++++ 9 files changed, 623 insertions(+), 30 deletions(-) create mode 100644 tools/testing/selftests/riscv/misaligned/.gitignore create mode 100644 tools/testing/selftests/riscv/misaligned/Makefile create mode 100644 tools/testing/selftests/riscv/misaligned/common.S create mode 100644 tools/testing/selftests/riscv/misaligned/fpu.S create mode 100644 tools/testing/selftests/riscv/misaligned/gp.S create mode 100644 tools/testing/selftests/riscv/misaligned/misaligned.c -- 2.49.0

5 months, 2 weeks

3
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[PATCH] selftests/bpf: Fix bpf selftest build error

by Saket Kumar Bhaskar

On linux-next, build for bpf selftest displays an error due to mismatch in the expected function signature of bpf_testmod_test_read and bpf_testmod_test_write. Commit 97d06802d10a ("sysfs: constify bin_attribute argument of bin_attribute::read/write()") changed the required type for struct bin_attribute to const struct bin_attribute. To resolve the error, update corresponding signature for the callback. Reported-by: Venkat Rao Bagalkote <venkat88(a)linux.ibm.com> Closes: https://lore.kernel.org/all/e915da49-2b9a-4c4c-a34f-877f378129f6@linux.ibm.… Signed-off-by: Saket Kumar Bhaskar <skb99(a)linux.ibm.com> --- tools/testing/selftests/bpf/test_kmods/bpf_testmod.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c b/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c index 2e54b95ad898..194c442580ee 100644 --- a/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c +++ b/tools/testing/selftests/bpf/test_kmods/bpf_testmod.c @@ -385,7 +385,7 @@ int bpf_testmod_fentry_ok; noinline ssize_t bpf_testmod_test_read(struct file *file, struct kobject *kobj, - struct bin_attribute *bin_attr, + const struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len) { struct bpf_testmod_test_read_ctx ctx = { @@ -465,7 +465,7 @@ ALLOW_ERROR_INJECTION(bpf_testmod_test_read, ERRNO); noinline ssize_t bpf_testmod_test_write(struct file *file, struct kobject *kobj, - struct bin_attribute *bin_attr, + const struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len) { struct bpf_testmod_test_write_ctx ctx = { -- 2.43.5

5 months, 2 weeks

4
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[PATCH v18 00/15] PCI: EP: Add RC-to-EP doorbell with platform MSI controller

by Frank Li

┌────────────┐ ┌───────────────────────────────────┐ ┌────────────────┐ │ │ │ │ │ │ │ │ │ PCI Endpoint │ │ PCI Host │ │ │ │ │ │ │ │ │◄──┤ 1.platform_msi_domain_alloc_irqs()│ │ │ │ │ │ │ │ │ │ MSI ├──►│ 2.write_msi_msg() ├──►├─BAR<n> │ │ Controller │ │ update doorbell register address│ │ │ │ │ │ for BAR │ │ │ │ │ │ │ │ 3. Write BAR<n>│ │ │◄──┼───────────────────────────────────┼───┤ │ │ │ │ │ │ │ │ ├──►│ 4.Irq Handle │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ └────────────┘ └───────────────────────────────────┘ └────────────────┘ This patches based on old https://lore.kernel.org/imx/20221124055036.1630573-1-Frank.Li@nxp.com/ Original patch only target to vntb driver. But actually it is common method. This patches add new API to pci-epf-core, so any EP driver can use it. Previous v2 discussion here. https://lore.kernel.org/imx/20230911220920.1817033-1-Frank.Li@nxp.com/ Changes in v18: - pci-ep.yaml: sort property order, fix maxvalue to 0x7ffff for msi-map-mask and iommu-map-mask - Link to v17: https://lore.kernel.org/r/20250407-ep-msi-v17-0-633ab45a31d0@nxp.com Changes in v17: - move document part to pci-ep.yaml - Link to v16: https://lore.kernel.org/r/20250404-ep-msi-v16-0-d4919d68c0d0@nxp.com Changes in v16: - remove arm64: dts: imx95-19x19-evk: Add PCIe1 endpoint function overlay file because there are better patches, which under review. - Add document for pcie-ep msi-map usage - other change to see each patch's change log About IMMUTABLE (No change for this part, tglx provide feedback) > - This IMMUTABLE thing serves no purpose, because you don't randomly > plug this end-point block on any MSI controller. They come as part > of an SoC. "Yes and no. The problem is that the EP implementation is meant to be a generic library and while GIC-ITS guarantees immutability of the address/data pair after setup, there are architectures (x86, loongson, riscv) where the base MSI controller does not and immutability is only achieved when interrupt remapping is enabled. The latter can be disabled at boot-time and then the EP implementation becomes a lottery across affinity changes. That was my concern about this library implementation and that's why I asked for a mechanism to ensure that the underlying irqdomain provides a immutable address/data pair. So it does not matter for GIC-ITS, but in the larger picture it matters. Thanks, tglx " So it does not matter for GIC-ITS, but in the larger picture it matters. - Link to v15: https://lore.kernel.org/r/20250211-ep-msi-v15-0-bcacc1f2b1a9@nxp.com Changes in v15: - rebase to v6.14-rc1 - fix build issue find by kernel test robot - Link to v14: https://lore.kernel.org/r/20250207-ep-msi-v14-0-9671b136f2b8@nxp.com Changes in v14: Marc Zyngier raised concerns about adding DOMAIN_BUS_DEVICE_PCI_EP_MSI. As a result, the approach has been reverted to the v9 method. However, there are several improvements: MSI now supports msi-map in addition to msi-parent. - The struct device: id is used as the endpoint function (EPF) device identity to map to the stream ID (sideband information). - The EPC device tree source (DTS) utilizes msi-map to provide such information. - The EPF device's of_node is set to the EPC controller’s node. This approach is commonly used for multi-function device (MFD) platform child devices, allowing them to inherit properties from the MFD device’s DTS, such as reset-cells and gpio-cells. This method is well-suited for the current case, as the EPF is inherently created/binded to the EPC and should inherit the EPC’s DTS node properties. Additionally: Since the basic IMX95 LUT support has already been merged into the mainline, a DTS and driver increment patch is added to complete the solution. The patch is rebased onto the latest linux-next tree and aligned with the new pcitest framework. - Link to v13: https://lore.kernel.org/r/20241218-ep-msi-v13-0-646e2192dc24@nxp.com Changes in v13: - Change to use DOMAIN_BUS_PCI_DEVICE_EP_MSI - Change request id as func | vfunc << 3 - Remove IRQ_DOMAIN_MSI_IMMUTABLE Thomas Gleixner: I hope capture all your points in review comments. If missed, let me know. - Link to v12: https://lore.kernel.org/r/20241211-ep-msi-v12-0-33d4532fa520@nxp.com Changes in v12: - Change to use IRQ_DOMAIN_MSI_IMMUTABLE and add help function irq_domain_msi_is_immuatble(). - split PCI: endpoint: pci-ep-msi: Add MSI address/data pair mutable check to 3 patches - Link to v11: https://lore.kernel.org/r/20241209-ep-msi-v11-0-7434fa8397bd@nxp.com Changes in v11: - Change to use MSI_FLAG_MSG_IMMUTABLE - Link to v10: https://lore.kernel.org/r/20241204-ep-msi-v10-0-87c378dbcd6d@nxp.com Changes in v10: Thomas Gleixner: There are big change in pci-ep-msi.c. I am sure if go on the corrent path. The key improvement is remove only 1 function devices's limitation. I use new patch for imutable check, which relative additional feature compared to base enablement patch. - Remove patch Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all() - Add new patch irqchip/gic-v3-its: Avoid overwriting msi_prepare callback if provided by msi_domain_info - Remove only support 1 endpoint function limiation. - Create one MSI domain for each endpoint function devices. - Use "msi-map" in pci ep controler node, instead of of msi-parent. first argument is (func_no << 8 | vfunc_no) - Link to v9: https://lore.kernel.org/r/20241203-ep-msi-v9-0-a60dbc3f15dd@nxp.com Changes in v9 - Add patch platform-msi: Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all() - Remove patch PCI: endpoint: Add pci_epc_get_fn() API for customizable filtering - Remove API pci_epf_align_inbound_addr_lo_hi - Move doorbell_alloc in to doorbell_enable function. - Link to v8: https://lore.kernel.org/r/20241116-ep-msi-v8-0-6f1f68ffd1bb@nxp.com Changes in v8: - update helper function name to pci_epf_align_inbound_addr() - Link to v7: https://lore.kernel.org/r/20241114-ep-msi-v7-0-d4ac7aafbd2c@nxp.com Changes in v7: - Add helper function pci_epf_align_addr(); - Link to v6: https://lore.kernel.org/r/20241112-ep-msi-v6-0-45f9722e3c2a@nxp.com Changes in v6: - change doorbell_addr to doorbell_offset - use round_down() - add Niklas's test by tag - rebase to pci/endpoint - Link to v5: https://lore.kernel.org/r/20241108-ep-msi-v5-0-a14951c0d007@nxp.com Changes in v5: - Move request_irq to epf test function driver for more flexiable user case - Add fixed size bar handler - Some minor improvememtn to see each patches's changelog. - Link to v4: https://lore.kernel.org/r/20241031-ep-msi-v4-0-717da2d99b28@nxp.com Changes in v4: - Remove patch genirq/msi: Add cleanup guard define for msi_lock_descs()/msi_unlock_descs() - Use new method to avoid compatible problem. Add new command DOORBELL_ENABLE and DOORBELL_DISABLE. pcitest -B send DOORBELL_ENABLE first, EP test function driver try to remap one of BAR_N (except test register bar) to ITS MSI MMIO space. Old driver don't support new command, so failure return, not side effect. After test, DOORBELL_DISABLE command send out to recover original map, so pcitest bar test can pass as normal. - Other detail change see each patches's change log - Link to v3: https://lore.kernel.org/r/20241015-ep-msi-v3-0-cedc89a16c1a@nxp.com Change from v2 to v3 - Fixed manivannan's comments - Move common part to pci-ep-msi.c and pci-ep-msi.h - rebase to 6.12-rc1 - use RevID to distingiush old version mkdir /sys/kernel/config/pci_ep/functions/pci_epf_test/func1 echo 16 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/msi_interrupts echo 0x080c > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/deviceid echo 0x1957 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/vendorid echo 1 > /sys/kernel/config/pci_ep/functions/pci_epf_test/func1/revid ^^^^^^ to enable platform msi support. ln -s /sys/kernel/config/pci_ep/functions/pci_epf_test/func1 /sys/kernel/config/pci_ep/controllers/4c380000.pcie-ep - use new device ID, which identify support doorbell to avoid broken compatility. Enable doorbell support only for PCI_DEVICE_ID_IMX8_DB, while other devices keep the same behavior as before. EP side RC with old driver RC with new driver PCI_DEVICE_ID_IMX8_DB no probe doorbell enabled Other device ID doorbell disabled* doorbell disabled* * Behavior remains unchanged. Change from v1 to v2 - Add missed patch for endpont/pci-epf-test.c - Move alloc and free to epc driver from epf. - Provide general help function for EPC driver to alloc platform msi irq. - Fixed manivannan's comments. Signed-off-by: Frank Li <Frank.Li(a)nxp.com> --- Frank Li (15): platform-msi: Add msi_remove_device_irq_domain() in platform_device_msi_free_irqs_all() irqdomain: Add IRQ_DOMAIN_FLAG_MSI_IMMUTABLE and irq_domain_is_msi_immutable() irqchip/gic-v3-its: Set IRQ_DOMAIN_FLAG_MSI_IMMUTABLE for ITS dt-bindings: PCI: pci-ep: Add support for iommu-map and msi-map irqchip/gic-v3-its: Add support for device tree msi-map and msi-mask PCI: endpoint: Set ID and of_node for function driver PCI: endpoint: Add RC-to-EP doorbell support using platform MSI controller PCI: endpoint: pci-ep-msi: Add MSI address/data pair mutable check PCI: endpoint: Add pci_epf_align_inbound_addr() helper for address alignment PCI: endpoint: pci-epf-test: Add doorbell test support misc: pci_endpoint_test: Add doorbell test case selftests: pci_endpoint: Add doorbell test case pci: imx6: Add helper function imx_pcie_add_lut_by_rid() pci: imx6: Add LUT setting for MSI/IOMMU in Endpoint mode arm64: dts: imx95: Add msi-map for pci-ep device Documentation/devicetree/bindings/pci/pci-ep.yaml | 68 ++++++++++ arch/arm64/boot/dts/freescale/imx95.dtsi | 1 + drivers/base/platform-msi.c | 1 + drivers/irqchip/irq-gic-v3-its-msi-parent.c | 8 ++ drivers/irqchip/irq-gic-v3-its.c | 2 +- drivers/misc/pci_endpoint_test.c | 82 ++++++++++++ drivers/pci/controller/dwc/pci-imx6.c | 25 ++-- drivers/pci/endpoint/Makefile | 1 + drivers/pci/endpoint/functions/pci-epf-test.c | 142 +++++++++++++++++++++ drivers/pci/endpoint/pci-ep-msi.c | 90 +++++++++++++ drivers/pci/endpoint/pci-epf-core.c | 48 +++++++ include/linux/irqdomain.h | 7 + include/linux/pci-ep-msi.h | 28 ++++ include/linux/pci-epf.h | 21 +++ include/uapi/linux/pcitest.h | 1 + .../selftests/pci_endpoint/pci_endpoint_test.c | 28 ++++ 16 files changed, 544 insertions(+), 9 deletions(-) --- base-commit: a4949bd40778aa9beac77c89e4c6a1da52875c8b change-id: 20241010-ep-msi-8b4cab33b1be Best regards, --- Frank Li <Frank.Li(a)nxp.com>

5 months, 2 weeks

5
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[PATCH v6 0/8] ublk: decouple server threads from hctxs

by Uday Shankar

This patch set aims to allow ublk server threads to better balance load amongst themselves by decoupling server threads from ublk queues/hctxs, so that multiple threads can service I/Os from a single hctx. The first patch is the functional change in the driver which switches from per-queue daemons to per-io daemons and allows for ublk servers to balance load that is imbalanced among queues. The second patch fixes a bug in tag allocation (in the sbitmap layer) that was observed while developing a test for this feature. The next five patches add support in the selftests ublk server (kublk) for this feature, and add a test which shows the new feature working as intended. The last patch documents the new feature. Signed-off-by: Uday Shankar <ushankar(a)purestorage.com> --- Changes in v6: - Add a feature flag for this feature, called UBLK_F_RR_TAGS (Ming Lei) - Add test for this feature (Ming Lei) - Add documentation for this feature (Ming Lei) - Link to v5: https://lore.kernel.org/r/20250416-ublk_task_per_io-v5-0-9261ad7bff20@pures… Changes in v5: - Set io->task before ublk_mark_io_ready (Caleb Sander Mateos) - Set io->task atomically, read it atomically when needed - Return 0 on success from command-specific helpers in __ublk_ch_uring_cmd (Caleb Sander Mateos) - Rename ublk_handle_need_get_data to ublk_get_data (Caleb Sander Mateos) - Link to v4: https://lore.kernel.org/r/20250415-ublk_task_per_io-v4-0-54210b91a46f@pures… Changes in v4: - Drop "ublk: properly serialize all FETCH_REQs" since Ming is taking it in another set - Prevent data races by marking data structures which should be read-only in the I/O path as const (Ming Lei) - Link to v3: https://lore.kernel.org/r/20250410-ublk_task_per_io-v3-0-b811e8f4554a@pures… Changes in v3: - Check for UBLK_IO_FLAG_ACTIVE on I/O again after taking lock to ensure that two concurrent FETCH_REQs on the same I/O can't succeed (Caleb Sander Mateos) - Link to v2: https://lore.kernel.org/r/20250408-ublk_task_per_io-v2-0-b97877e6fd50@pures… Changes in v2: - Remove changes split into other patches - To ease error handling/synchronization, associate each I/O (instead of each queue) to the last task that issues a FETCH_REQ against it. Only that task is allowed to operate on the I/O. - Link to v1: https://lore.kernel.org/r/20241002224437.3088981-1-ushankar@purestorage.com --- Uday Shankar (8): ublk: have a per-io daemon instead of a per-queue daemon sbitmap: fix off-by-one when wrapping hint selftests: ublk: kublk: plumb q_id in io_uring user_data selftests: ublk: kublk: tie sqe allocation to io instead of queue selftests: ublk: kublk: lift queue initialization out of thread selftests: ublk: kublk: move per-thread data out of ublk_queue selftests: ublk: kublk: decouple ublk_queues from ublk server threads Documentation: ublk: document UBLK_F_RR_TAGS Documentation/block/ublk.rst | 83 +++++- drivers/block/ublk_drv.c | 82 ++--- include/uapi/linux/ublk_cmd.h | 8 + lib/sbitmap.c | 4 +- tools/testing/selftests/ublk/Makefile | 1 + tools/testing/selftests/ublk/fault_inject.c | 4 +- tools/testing/selftests/ublk/file_backed.c | 20 +- tools/testing/selftests/ublk/kublk.c | 329 ++++++++++++++------- tools/testing/selftests/ublk/kublk.h | 73 +++-- tools/testing/selftests/ublk/null.c | 12 +- tools/testing/selftests/ublk/stripe.c | 17 +- tools/testing/selftests/ublk/test_generic_08.sh | 61 ++++ .../selftests/ublk/trace/count_ios_per_tid.bt | 9 + 13 files changed, 488 insertions(+), 215 deletions(-) --- base-commit: 037af793557ed192b2c10cf2379ac97abacedf55 change-id: 20250408-ublk_task_per_io-c693cf608d7a Best regards, -- Uday Shankar <ushankar(a)purestorage.com>

5 months, 2 weeks

5
21
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Inquiry

by Philip Burchett

Greetings, Supplier. Please give us your most recent catalog; we would want to order from you. I look forward to your feedback. Philip Burchett

5 months, 2 weeks

1
0
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[PATCH 0/3] KVM: arm64: selftests: arch_timer_edge_cases fixes

by Sebastian Ott

Some small fixes for arch_timer_edge_cases that I stumbled upon while debugging failures for this selftest on ampere-one. Sebastian Ott (3): KVM: arm64: selftests: fix help text for arch_timer_edge_cases KVM: arm64: selftests: fix thread migration in arch_timer_edge_cases KVM: arm64: selftests: arch_timer_edge_cases - workaround for AC03_CPU_14 .../selftests/kvm/arm64/arch_timer_edge_cases.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) base-commit: 9c69f88849045499e8ad114e5e13dbb3c85f4443 -- 2.49.0

5 months, 3 weeks

2
4
0 0

[PATCH net v2] tests/ncdevmem: Fix double-free of queue array

by Cosmin Ratiu

netdev_bind_rx takes ownership of the queue array passed as parameter and frees it, so a queue array buffer cannot be reused across multiple netdev_bind_rx calls. This commit fixes that by always passing in a newly created queue array to all netdev_bind_rx calls in ncdevmem. Fixes: 85585b4bc8d8 ("selftests: add ncdevmem, netcat for devmem TCP") Signed-off-by: Cosmin Ratiu <cratiu(a)nvidia.com> --- .../selftests/drivers/net/hw/ncdevmem.c | 55 ++++++++----------- 1 file changed, 22 insertions(+), 33 deletions(-) diff --git a/tools/testing/selftests/drivers/net/hw/ncdevmem.c b/tools/testing/selftests/drivers/net/hw/ncdevmem.c index 2bf14ac2b8c6..9d48004ff1a1 100644 --- a/tools/testing/selftests/drivers/net/hw/ncdevmem.c +++ b/tools/testing/selftests/drivers/net/hw/ncdevmem.c @@ -431,6 +431,22 @@ static int parse_address(const char *str, int port, struct sockaddr_in6 *sin6) return 0; } +static struct netdev_queue_id *create_queues(void) +{ + struct netdev_queue_id *queues; + size_t i = 0; + + queues = calloc(num_queues, sizeof(*queues)); + for (i = 0; i < num_queues; i++) { + queues[i]._present.type = 1; + queues[i]._present.id = 1; + queues[i].type = NETDEV_QUEUE_TYPE_RX; + queues[i].id = start_queue + i; + } + + return queues; +} + int do_server(struct memory_buffer *mem) { char ctrl_data[sizeof(int) * 20000]; @@ -448,7 +464,6 @@ int do_server(struct memory_buffer *mem) char buffer[256]; int socket_fd; int client_fd; - size_t i = 0; int ret; ret = parse_address(server_ip, atoi(port), &server_sin); @@ -471,16 +486,7 @@ int do_server(struct memory_buffer *mem) sleep(1); - queues = malloc(sizeof(*queues) * num_queues); - - for (i = 0; i < num_queues; i++) { - queues[i]._present.type = 1; - queues[i]._present.id = 1; - queues[i].type = NETDEV_QUEUE_TYPE_RX; - queues[i].id = start_queue + i; - } - - if (bind_rx_queue(ifindex, mem->fd, queues, num_queues, &ys)) + if (bind_rx_queue(ifindex, mem->fd, create_queues(), num_queues, &ys)) error(1, 0, "Failed to bind\n"); tmp_mem = malloc(mem->size); @@ -545,7 +551,6 @@ int do_server(struct memory_buffer *mem) goto cleanup; } - i++; for (cm = CMSG_FIRSTHDR(&msg); cm; cm = CMSG_NXTHDR(&msg, cm)) { if (cm->cmsg_level != SOL_SOCKET || (cm->cmsg_type != SCM_DEVMEM_DMABUF && @@ -630,10 +635,8 @@ int do_server(struct memory_buffer *mem) void run_devmem_tests(void) { - struct netdev_queue_id *queues; struct memory_buffer *mem; struct ynl_sock *ys; - size_t i = 0; mem = provider->alloc(getpagesize() * NUM_PAGES); @@ -641,38 +644,24 @@ void run_devmem_tests(void) if (configure_rss()) error(1, 0, "rss error\n"); - queues = calloc(num_queues, sizeof(*queues)); - if (configure_headersplit(1)) error(1, 0, "Failed to configure header split\n"); - if (!bind_rx_queue(ifindex, mem->fd, queues, num_queues, &ys)) + if (!bind_rx_queue(ifindex, mem->fd, + calloc(num_queues, sizeof(struct netdev_queue_id)), + num_queues, &ys)) error(1, 0, "Binding empty queues array should have failed\n"); - for (i = 0; i < num_queues; i++) { - queues[i]._present.type = 1; - queues[i]._present.id = 1; - queues[i].type = NETDEV_QUEUE_TYPE_RX; - queues[i].id = start_queue + i; - } - if (configure_headersplit(0)) error(1, 0, "Failed to configure header split\n"); - if (!bind_rx_queue(ifindex, mem->fd, queues, num_queues, &ys)) + if (!bind_rx_queue(ifindex, mem->fd, create_queues(), num_queues, &ys)) error(1, 0, "Configure dmabuf with header split off should have failed\n"); if (configure_headersplit(1)) error(1, 0, "Failed to configure header split\n"); - for (i = 0; i < num_queues; i++) { - queues[i]._present.type = 1; - queues[i]._present.id = 1; - queues[i].type = NETDEV_QUEUE_TYPE_RX; - queues[i].id = start_queue + i; - } - - if (bind_rx_queue(ifindex, mem->fd, queues, num_queues, &ys)) + if (bind_rx_queue(ifindex, mem->fd, create_queues(), num_queues, &ys)) error(1, 0, "Failed to bind\n"); /* Deactivating a bound queue should not be legal */ -- 2.45.0

5 months, 3 weeks

5
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[PATCH bpf-next v4 0/5] Replace CONFIG_DMABUF_SYSFS_STATS with BPF

by T.J. Mercier

Until CONFIG_DMABUF_SYSFS_STATS was added [1] it was only possible to perform per-buffer accounting with debugfs which is not suitable for production environments. Eventually we discovered the overhead with per-buffer sysfs file creation/removal was significantly impacting allocation and free times, and exacerbated kernfs lock contention. [2] dma_buf_stats_setup() is responsible for 39% of single-page buffer creation duration, or 74% of single-page dma_buf_export() duration when stressing dmabuf allocations and frees. I prototyped a change from per-buffer to per-exporter statistics with a RCU protected list of exporter allocations that accommodates most (but not all) of our use-cases and avoids almost all of the sysfs overhead. While that adds less overhead than per-buffer sysfs, and less even than the maintenance of the dmabuf debugfs_list, it's still *additional* overhead on top of the debugfs_list and doesn't give us per-buffer info. This series uses the existing dmabuf debugfs_list to implement a BPF dmabuf iterator, which adds no overhead to buffer allocation/free and provides per-buffer info. The list has been moved outside of CONFIG_DEBUG_FS scope so that it is always populated. The BPF program loaded by userspace that extracts per-buffer information gets to define its own interface which avoids the lack of ABI stability with debugfs. This will allow us to replace our use of CONFIG_DMABUF_SYSFS_STATS, and the plan is to remove it from the kernel after the next longterm stable release. [1] https://lore.kernel.org/linux-media/20201210044400.1080308-1-hridya@google.… [2] https://lore.kernel.org/all/20220516171315.2400578-1-tjmercier@google.com v1: https://lore.kernel.org/all/20250414225227.3642618-1-tjmercier@google.com v1 -> v2: Make the DMA buffer list independent of CONFIG_DEBUG_FS per Christian König Add CONFIG_DMA_SHARED_BUFFER check to kernel/bpf/Makefile per kernel test robot Use BTF_ID_LIST_SINGLE instead of BTF_ID_LIST_GLOBAL_SINGLE per Song Liu Fixup comment style, mixing code/declarations, and use ASSERT_OK_FD in selftest per Song Liu Add BPF_ITER_RESCHED feature to bpf_dmabuf_reg_info per Alexei Starovoitov Add open-coded iterator and selftest per Alexei Starovoitov Add a second test buffer from the system dmabuf heap to selftests Use the BPF program we'll use in production for selftest per Alexei Starovoitov https://r.android.com/c/platform/system/bpfprogs/+/3616123/2/dmabufIter.c https://r.android.com/c/platform/system/memory/libmeminfo/+/3614259/1/libdm… v2: https://lore.kernel.org/all/20250504224149.1033867-1-tjmercier@google.com v2 -> v3: Rebase onto bpf-next/master Move get_next_dmabuf() into drivers/dma-buf/dma-buf.c, along with the new get_first_dmabuf(). This avoids having to expose the dmabuf list and mutex to the rest of the kernel, and keeps the dmabuf mutex operations near each other in the same file. (Christian König) Add Christian's RB to dma-buf: Rename debugfs symbols Drop RFC: dma-buf: Remove DMA-BUF statistics v3: https://lore.kernel.org/all/20250507001036.2278781-1-tjmercier@google.com v3 -> v4: Fix selftest BPF program comment style (not kdoc) per Alexei Starovoitov Fix dma-buf.c kdoc comment style per Alexei Starovoitov Rename get_first_dmabuf / get_next_dmabuf to dma_buf_iter_begin / dma_buf_iter_next per Christian König Add Christian's RB to bpf: Add dmabuf iterator T.J. Mercier (5): dma-buf: Rename debugfs symbols bpf: Add dmabuf iterator bpf: Add open coded dmabuf iterator selftests/bpf: Add test for dmabuf_iter selftests/bpf: Add test for open coded dmabuf_iter drivers/dma-buf/dma-buf.c | 98 +++++-- include/linux/dma-buf.h | 4 +- kernel/bpf/Makefile | 3 + kernel/bpf/dmabuf_iter.c | 149 ++++++++++ kernel/bpf/helpers.c | 5 + .../testing/selftests/bpf/bpf_experimental.h | 5 + tools/testing/selftests/bpf/config | 3 + .../selftests/bpf/prog_tests/dmabuf_iter.c | 258 ++++++++++++++++++ .../testing/selftests/bpf/progs/dmabuf_iter.c | 91 ++++++ 9 files changed, 594 insertions(+), 22 deletions(-) create mode 100644 kernel/bpf/dmabuf_iter.c create mode 100644 tools/testing/selftests/bpf/prog_tests/dmabuf_iter.c create mode 100644 tools/testing/selftests/bpf/progs/dmabuf_iter.c base-commit: 43745d11bfd9683abdf08ad7a5cc403d6a9ffd15 -- 2.49.0.1015.ga840276032-goog

5 months, 3 weeks

3
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[PATCH v8 iproute2-next 0/1] DUALPI2 iproute2 patch

by chia-yu.chang＠nokia-bell-labs.com

From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com> Hello, Please find DUALPI2 iproute2 patch v8. v8 (09-May-25) - Update pkt_sched.h with the one in nex-next - Fix one typo of comment in pkt_sched.h (ALOK TIWARI <alok.a.tiwari(a)oracle.com>) - Update manual content in man/man8/tc-dualpi2.8 (ALOK TIWARI <alok.a.tiwari(a)oracle.com>) - Update tc/q_dualpi2.c to fix missing blank lines and add missing case (ALOK TIWARI <alok.a.tiwari(a)oracle.com>) v7 (05-May-25) - Align pkt_sched.h with the v14 version of net-next due to spec modificiaotn in tc.yaml - Reorganize dualpi2_print_opt() to match the order in tc.yaml - Remove credit-queue in PRINT_JSON v6 (26-Apr-25) - Update JSON file output due to spec modifiocation in tc.yaml of net-next v5 (25-Mar-25) - Use matches() to replace current strcmp() (Stephen Hemminger <stephen(a)networkplumber.org>) - Use general parse_percent() for handling scaled percentage values (Stephen Hemminger <stephen(a)networkplumber.org>) - Add print function for JSON of dualpi2 stats (Stephen Hemminger <stephen(a)networkplumber.org>) v4 (16-Mar-25) - Add min_qlen_step to dualpi2 attribute as the minimum queue length in number of packets in the L-queue to start step amrking. v3 (21-Feb-25) - Add memlimit to dualpi2 attribute, and add memory_used, max_memory_used, memory_limit in dualpi2 stats (Dave Taht <dave.taht(a)gmail.com>) - Update manual to align latest implementation and clarify the queue naming and default unit - Use common "get_scaled_alpha_beta" and clean print_opt for Dualpi2 v2 (23-Oct-24) - Rename get_float in dualpi2 to get_float_min_max in utils.c - Move get_float from iplink_can.c in utils.c (Stephen Hemminger <stephen(a)networkplumber.org>) - Add print function for JSON of dualpi2 (Stephen Hemminger <stephen(a)networkplumber.org>) For more details of DualPI2, plesae refer IETF RFC9332 (https://datatracker.ietf.org/doc/html/rfc9332). Best Regards, Chia-Yu Chia-Yu Chang (1): tc: add dualpi2 scheduler module bash-completion/tc | 11 +- include/uapi/linux/pkt_sched.h | 68 +++++ include/utils.h | 2 + ip/iplink_can.c | 14 - lib/utils.c | 30 ++ man/man8/tc-dualpi2.8 | 249 +++++++++++++++ tc/Makefile | 1 + tc/q_dualpi2.c | 534 +++++++++++++++++++++++++++++++++ 8 files changed, 894 insertions(+), 15 deletions(-) create mode 100644 man/man8/tc-dualpi2.8 create mode 100644 tc/q_dualpi2.c -- 2.34.1

5 months, 3 weeks

1
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[PATCH] kunit: configs: Enable coverage of the bitfield packing library

by Mark Brown

There are KUnit tests for the bitfield packing library but these depend on CONFIG_PACKING which is not enabled by anything in either the existing KUnit all_tests.config or the base UML config it runs on as standard. Enable that in all_tests.config to improve coverage. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/kunit/configs/all_tests.config | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/kunit/configs/all_tests.config b/tools/testing/kunit/configs/all_tests.config index cdd9782f9646..b0223b7aebde 100644 --- a/tools/testing/kunit/configs/all_tests.config +++ b/tools/testing/kunit/configs/all_tests.config @@ -51,3 +51,5 @@ CONFIG_SOUND=y CONFIG_SND=y CONFIG_SND_SOC=y CONFIG_SND_SOC_TOPOLOGY_BUILD=y + +CONFIG_PACKING=y --- base-commit: 8ffd015db85fea3e15a77027fda6c02ced4d2444 change-id: 20250422-kunit-enable-missing-tests-9189ee930cae Best regards, -- Mark Brown <broonie(a)kernel.org>

5 months, 3 weeks

2
1
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[PATCH] selftests/seccomp: fix negative_ENOSYS tracer tests on arm32

by Terry Tritton

TRACE_syscall.ptrace.negative_ENOSYS and TRACE_syscall.seccomp.negative_ENOSYS on arm32 are being reported as failures instead of skipping. The teardown_trace_fixture function sets the test to KSFT_FAIL in case of a non 0 return value from the tracer process. Due to _metadata now being shared between the forked processes the tracer is returning the KSFT_SKIP value set by the tracee which is non 0. Remove the setting of the _metadata.exit_code in teardown_trace_fixture. Fixes: 24cf65a62266 ("selftests/harness: Share _metadata between forked processes") Signed-off-by: Terry Tritton <terry.tritton(a)linaro.org> --- tools/testing/selftests/seccomp/seccomp_bpf.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c index b2f76a52215a..c43a6f8f8cd5 100644 --- a/tools/testing/selftests/seccomp/seccomp_bpf.c +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c @@ -1629,14 +1629,8 @@ void teardown_trace_fixture(struct __test_metadata *_metadata, { if (tracer) { int status; - /* - * Extract the exit code from the other process and - * adopt it for ourselves in case its asserts failed. - */ ASSERT_EQ(0, kill(tracer, SIGUSR1)); ASSERT_EQ(tracer, waitpid(tracer, &status, 0)); - if (WEXITSTATUS(status)) - _metadata->exit_code = KSFT_FAIL; } } -- 2.39.5

5 months, 3 weeks

2
1
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[PATCH 0/3] selftests/timens: Various small fixes

by Thomas Weißschuh

Fixes for various issues in the timens selftests. Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- Thomas Weißschuh (3): selftests/timens: Print TAP headers selftests/timens: Make run_tests() functions static selftests/timens: timerfd: Use correct clockid type in tclock_gettime() tools/testing/selftests/timens/clock_nanosleep.c | 4 +++- tools/testing/selftests/timens/exec.c | 2 ++ tools/testing/selftests/timens/futex.c | 2 ++ tools/testing/selftests/timens/gettime_perf.c | 2 ++ tools/testing/selftests/timens/procfs.c | 2 ++ tools/testing/selftests/timens/timens.c | 2 ++ tools/testing/selftests/timens/timer.c | 4 +++- tools/testing/selftests/timens/timerfd.c | 6 ++++-- tools/testing/selftests/timens/vfork_exec.c | 2 ++ 9 files changed, 22 insertions(+), 4 deletions(-) --- base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8 change-id: 20250326-selftests-timens-fixes-97662bdb18b6 Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

5 months, 3 weeks

4
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[PATCH] KVM: SEV: Disable SEV-SNP support on initialization failure

by Ashish Kalra

From: Ashish Kalra <ashish.kalra(a)amd.com> During platform init, SNP initialization may fail for several reasons, such as firmware command failures and incompatible versions. However, the KVM capability may continue to advertise support for it. The platform may have SNP enabled but if SNP_INIT fails then SNP is not supported by KVM. During KVM module initialization query the SNP platform status to obtain the SNP initialization state and use it as an additional condition to determine support for SEV-SNP. Co-developed-by: Sean Christopherson <seanjc(a)google.com> Signed-off-by: Sean Christopherson <seanjc(a)google.com> Co-developed-by: Pratik R. Sampat <prsampat(a)amd.com> Signed-off-by: Pratik R. Sampat <prsampat(a)amd.com> Signed-off-by: Ashish Kalra <ashish.kalra(a)amd.com> --- arch/x86/kvm/svm/sev.c | 43 +++++++++++++++++++++++++++++++++--------- 1 file changed, 34 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index ada53f04158c..a6abdb26f877 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2934,6 +2934,32 @@ void __init sev_set_cpu_caps(void) } } +static bool sev_is_snp_initialized(void) +{ + struct sev_user_data_snp_status *status; + struct sev_data_snp_addr buf; + bool initialized = false; + void *data; + int error; + + data = snp_alloc_firmware_page(GFP_KERNEL_ACCOUNT | __GFP_ZERO); + if (!data) + return initialized; + + buf.address = __psp_pa(data); + if (sev_do_cmd(SEV_CMD_SNP_PLATFORM_STATUS, &buf, &error)) + goto out; + + status = (struct sev_user_data_snp_status *)data; + if (status->state) + initialized = true; + +out: + snp_free_firmware_page(data); + + return initialized; +} + void __init sev_hardware_setup(void) { unsigned int eax, ebx, ecx, edx, sev_asid_count, sev_es_asid_count; @@ -3038,6 +3064,14 @@ void __init sev_hardware_setup(void) sev_snp_supported = sev_snp_enabled && cc_platform_has(CC_ATTR_HOST_SEV_SNP); out: + if (sev_enabled) { + init_args.probe = true; + if (sev_platform_init(&init_args)) + sev_supported = sev_es_supported = sev_snp_supported = false; + else + sev_snp_supported &= sev_is_snp_initialized(); + } + if (boot_cpu_has(X86_FEATURE_SEV)) pr_info("SEV %s (ASIDs %u - %u)\n", sev_supported ? min_sev_asid <= max_sev_asid ? "enabled" : @@ -3064,15 +3098,6 @@ void __init sev_hardware_setup(void) sev_supported_vmsa_features = 0; if (sev_es_debug_swap_enabled) sev_supported_vmsa_features |= SVM_SEV_FEAT_DEBUG_SWAP; - - if (!sev_enabled) - return; - - /* - * Do both SNP and SEV initialization at KVM module load. - */ - init_args.probe = true; - sev_platform_init(&init_args); } void sev_hardware_unsetup(void) -- 2.34.1

5 months, 3 weeks

4
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[PATCH v2] selftests/ftrace: Convert poll to a gen_file

by Ayush Jain

Poll program is a helper to ftracetest, thus make it a generic file and remove it from being run as a test. Currently when executing tests using $ make run_tests CC poll TAP version 13 1..2 # timeout set to 0 # selftests: ftrace: poll # Error: Polling file is not specified not ok 1 selftests: ftrace: poll # exit=255 Fix this by using TEST_GEN_FILES to build the 'poll' binary as a helper rather than as a test. Fixes: 80c3e28528ff ("selftests/tracing: Add hist poll() support test") Signed-off-by: Ayush Jain <Ayush.jain3(a)amd.com> --- tools/testing/selftests/ftrace/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/ftrace/Makefile b/tools/testing/selftests/ftrace/Makefile index 49d96bb16355..7c12263f8260 100644 --- a/tools/testing/selftests/ftrace/Makefile +++ b/tools/testing/selftests/ftrace/Makefile @@ -6,6 +6,6 @@ TEST_PROGS := ftracetest-ktap TEST_FILES := test.d settings EXTRA_CLEAN := $(OUTPUT)/logs/* -TEST_GEN_PROGS = poll +TEST_GEN_FILES := poll include ../lib.mk -- 2.34.1

5 months, 3 weeks

3
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[PATCH] selftests/bpf: Fix bpf selftest build warning

by Saket Kumar Bhaskar

On linux-next, build for bpf selftest displays a warning: Warning: Kernel ABI header at 'tools/include/uapi/linux/if_xdp.h' differs from latest version at 'include/uapi/linux/if_xdp.h'. Commit 8066e388be48 ("net: add UAPI to the header guard in various network headers") changed the header guard from _LINUX_IF_XDP_H to _UAPI_LINUX_IF_XDP_H in include/uapi/linux/if_xdp.h. To resolve the warning, update tools/include/uapi/linux/if_xdp.h to align with the changes in include/uapi/linux/if_xdp.h Reported-by: Venkat Rao Bagalkote <venkat88(a)linux.ibm.com> Closes: https://lore.kernel.org/all/c2bc466d-dff2-4d0d-a797-9af7f676c065@linux.ibm.… Signed-off-by: Saket Kumar Bhaskar <skb99(a)linux.ibm.com> --- tools/include/uapi/linux/if_xdp.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/include/uapi/linux/if_xdp.h b/tools/include/uapi/linux/if_xdp.h index 42869770776e..44f2bb93e7e6 100644 --- a/tools/include/uapi/linux/if_xdp.h +++ b/tools/include/uapi/linux/if_xdp.h @@ -7,8 +7,8 @@ * Magnus Karlsson <magnus.karlsson(a)intel.com> */ -#ifndef _LINUX_IF_XDP_H -#define _LINUX_IF_XDP_H +#ifndef _UAPI_LINUX_IF_XDP_H +#define _UAPI_LINUX_IF_XDP_H #include <linux/types.h> @@ -180,4 +180,4 @@ struct xdp_desc { /* TX packet carries valid metadata. */ #define XDP_TX_METADATA (1 << 1) -#endif /* _LINUX_IF_XDP_H */ +#endif /* _UAPI_LINUX_IF_XDP_H */ -- 2.43.5

5 months, 3 weeks

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[PATCH v3 00/23] iommufd: Add vIOMMU infrastructure (Part-4 vQUEUE)

by Nicolin Chen

The vIOMMU object is designed to represent a slice of an IOMMU HW for its virtualization features shared with or passed to user space (a VM mostly) in a way of HW acceleration. This extended the HWPT-based design for more advanced virtualization feature. A vQUEUE introduced by this series as a part of the vIOMMU infrastructure represents a HW accelerated queue/buffer for VM to use exclusively, e.g. - NVIDIA's Virtual Command Queue - AMD vIOMMU's Command Buffer, Event Log Buffer, and PPR Log Buffer each of which is an IOMMU HW feature to directly access the virtual queue in the guest address space, to avoid VM Exits to improve the performance. As an initial use case, it adds support for guest-owned HW virtual queues that VMM can allocate per request from a guest OS writing the VM register. Introduce IOMMUFD_OBJ_VQUEUE and its allocator IOMMUFD_CMD_VQUEUE_ALLOC, allowing VMM to forward the IOMMU-specific queue info, such as queue base address, size, and etc. Meanwhile, a guest-owned virtual queue needs the kernel (a virtual queue driver) to control the queue by reading/writing its consumer and producer indexes, which means the virtual queue HW allows the guest kernel to get a direct R/W access to those registers. Introduce an mmap infrastructure to the iommufd core so as to support pass through a piece of MMIO region from the host physical address space to the guest physical address space. The VMA info (vm_pgoff/size) used by an mmap must be pre-allocated during the IOMMUFD_CMD_VQUEUE_ALLOC and returned to the user space as an output driver-data carried via the IOMMUFD_CMD_VQUEUE_ALLOC. So, this requires a driver-specific user data support in the vIOMMU allocation flow. As a real-world use case, this series implements a vQUEUE support to the tegra241-cmdqv driver for VCMDQs on NVIDIA Grace CPU. In another word, it is also the Tegra CMDQV series Part-2 (user-space support), reworked from Previous RFCv1: https://lore.kernel.org/all/cover.1712978212.git.nicolinc@nvidia.com/ This enables the HW accelerated feature for NVIDIA Grace CPU. Compared to the standard SMMUv3 operating in the nested translation mode trapping CMDQ for TLBI and ATC_INV commands, this gives a huge performance improvement: 70% to 90% reductions of invalidation time were measured by various DMA unmap tests running in a guest OS. // Unmap latencies from "dma_map_benchmark -g @granule -t @threads", // by toggling "/sys/kernel/debug/iommu/tegra241_cmdqv/bypass_vcmdq" @granule | @threads | bypass_vcmdq=1 | bypass_vcmdq=0 4KB 1 35.7 us 5.3 us 16KB 1 41.8 us 6.8 us 64KB 1 68.9 us 9.9 us 128KB 1 109.0 us 12.6 us 256KB 1 187.1 us 18.0 us 4KB 2 96.9 us 6.8 us 16KB 2 97.8 us 7.5 us 64KB 2 151.5 us 10.7 us 128KB 2 257.8 us 12.7 us 256KB 2 443.0 us 17.9 us This is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_vqueue-v3 Paring QEMU branch for testing: https://github.com/nicolinc/qemu/commits/wip/for_iommufd_vqueue-v3 Changelog v3 * Add Reviewed-by from Baolu, Pranjal, and Alok * Revise kdocs, uAPI docs, and commit logs * Rename "vCMDQ" back to "vQUEUE" for AMD cases * [tegra] Add tegra241_vcmdq_hw_flush_timeout() * [tegra] Rename vsmmu_alloc to alloc_vintf_user * [tegra] Use writel for SID replacement registers * [tegra] Move mmap removal call to vsmmu_destroy op * [tegra] Fix revert in tegra241_vintf_alloc_lvcmdq_user() * [iommufd] Replace "& ~PAGE_MASK" with PAGE_ALIGNED() * [iommufd] Add an object-type "owner" to immap structure * [iommufd] Drop the ictx input in the new for-driver APIs * [iommufd] Add iommufd_vma_ops to keep track of mmap lifecycle * [iommufd] Add viommu-based iommufd_viommu_alloc/destroy_mmap helpers * [iommufd] Rename iommufd_ctx_alloc/free_mmap to _iommufd_alloc/destroy_mmap v2 https://lore.kernel.org/all/cover.1745646960.git.nicolinc@nvidia.com/ * Add Reviewed-by from Jason * [smmu] Fix vsmmu initial value * [smmu] Support impl for hw_info * [tegra] Rename "slot" to "vsid" * [tegra] Update kdocs and commit logs * [tegra] Map/unmap LVCMDQ dynamically * [tegra] Refcount the previous LVCMDQ * [tegra] Return -EEXIST if LVCMDQ exists * [tegra] Simplify VINTF cleanup routine * [tegra] Use vmid and s2_domain in vsmmu * [tegra] Rename "mmap_pgoff" to "immap_id" * [tegra] Add more addr and length validation * [iommufd] Add more narrative to mmap's kdoc * [iommufd] Add iommufd_struct_depend/undepend() * [iommufd] Rename vcmdq_free op to vcmdq_destroy * [iommufd] Fix bug in iommu_copy_struct_to_user() * [iommufd] Drop is_io from iommufd_ctx_alloc_mmap() * [iommufd] Test the queue memory for its contiguity * [iommufd] Return -ENXIO if address or length fails * [iommufd] Do not change @min_last in mock_viommu_alloc() * [iommufd] Generalize TEGRA241_VCMDQ data in core structure * [iommufd] Add selftest coverage for IOMMUFD_CMD_VCMDQ_ALLOC * [iommufd] Add iopt_pin_pages() to prevent queue memory from unmapping v1 https://lore.kernel.org/all/cover.1744353300.git.nicolinc@nvidia.com/ Thanks Nicolin Nicolin Chen (23): iommufd/viommu: Add driver-allocated vDEVICE support iommu: Pass in a driver-level user data structure to viommu_alloc op iommufd/viommu: Allow driver-specific user data for a vIOMMU object iommu: Add iommu_copy_struct_to_user helper iommufd/driver: Let iommufd_viommu_alloc helper save ictx to viommu->ictx iommufd/driver: Add iommufd_struct_destroy to revert iommufd_viommu_alloc iommufd/selftest: Support user_data in mock_viommu_alloc iommufd/selftest: Add covearge for viommu data iommufd: Abstract iopt_pin_pages and iopt_unpin_pages helpers iommufd/viommu: Introduce IOMMUFD_OBJ_VQUEUE and its related struct iommufd/viommu: Add IOMMUFD_CMD_VQUEUE_ALLOC ioctl iommufd/driver: Add iommufd_vqueue_depend/undepend() helpers iommufd/selftest: Add coverage for IOMMUFD_CMD_VQUEUE_ALLOC iommufd: Add mmap interface iommufd/selftest: Add coverage for the new mmap interface Documentation: userspace-api: iommufd: Update vQUEUE iommu/arm-smmu-v3-iommufd: Add vsmmu_alloc impl op iommu/arm-smmu-v3-iommufd: Support implementation-defined hw_info iommu/tegra241-cmdqv: Use request_threaded_irq iommu/tegra241-cmdqv: Simplify deinit flow in tegra241_cmdqv_remove_vintf() iommu/tegra241-cmdqv: Do not statically map LVCMDQs iommu/tegra241-cmdqv: Add user-space use support iommu/tegra241-cmdqv: Add IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV support drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 25 +- drivers/iommu/iommufd/io_pagetable.h | 8 + drivers/iommu/iommufd/iommufd_private.h | 28 +- drivers/iommu/iommufd/iommufd_test.h | 20 + include/linux/iommu.h | 43 +- include/linux/iommufd.h | 184 ++++++- include/uapi/linux/iommufd.h | 117 ++++- tools/testing/selftests/iommu/iommufd_utils.h | 52 +- .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 42 +- .../iommu/arm/arm-smmu-v3/tegra241-cmdqv.c | 481 +++++++++++++++++- drivers/iommu/iommufd/device.c | 117 +---- drivers/iommu/iommufd/driver.c | 88 ++++ drivers/iommu/iommufd/io_pagetable.c | 95 ++++ drivers/iommu/iommufd/main.c | 84 ++- drivers/iommu/iommufd/selftest.c | 126 ++++- drivers/iommu/iommufd/viommu.c | 116 ++++- tools/testing/selftests/iommu/iommufd.c | 96 +++- .../selftests/iommu/iommufd_fail_nth.c | 11 +- Documentation/userspace-api/iommufd.rst | 15 + 19 files changed, 1555 insertions(+), 193 deletions(-) -- 2.43.0

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