From: Ram Pai linuxram@us.ibm.com
This introduces some generic abstractions and provides the corresponding architecture-specfic implementations for these abstractions.
cc: Dave Hansen dave.hansen@intel.com cc: Florian Weimer fweimer@redhat.com Signed-off-by: Ram Pai linuxram@us.ibm.com Signed-off-by: Thiago Jung Bauermann bauerman@linux.ibm.com Signed-off-by: Sandipan Das sandipan@linux.ibm.com --- tools/testing/selftests/vm/pkey-helpers.h | 12 ++++++++++++ tools/testing/selftests/vm/pkey-x86.h | 15 +++++++++++++++ tools/testing/selftests/vm/protection_keys.c | 8 ++------ 3 files changed, 29 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/vm/pkey-helpers.h b/tools/testing/selftests/vm/pkey-helpers.h index 0e3da7c8d628..621fb2a0a5ef 100644 --- a/tools/testing/selftests/vm/pkey-helpers.h +++ b/tools/testing/selftests/vm/pkey-helpers.h @@ -74,6 +74,9 @@ extern void abort_hooks(void); } \ } while (0)
+__attribute__((noinline)) int read_ptr(int *ptr); +void expected_pkey_fault(int pkey); + #if defined(__i386__) || defined(__x86_64__) /* arch */ #include "pkey-x86.h" #else /* arch */ @@ -172,4 +175,13 @@ static inline void __pkey_write_allow(int pkey, int do_allow_write) #define __stringify_1(x...) #x #define __stringify(x...) __stringify_1(x)
+static inline u32 *siginfo_get_pkey_ptr(siginfo_t *si) +{ +#ifdef si_pkey + return &si->si_pkey; +#else + return (u32 *)(((u8 *)si) + si_pkey_offset); +#endif +} + #endif /* _PKEYS_HELPER_H */ diff --git a/tools/testing/selftests/vm/pkey-x86.h b/tools/testing/selftests/vm/pkey-x86.h index def2a1bcf6a5..a0c59d4f7af2 100644 --- a/tools/testing/selftests/vm/pkey-x86.h +++ b/tools/testing/selftests/vm/pkey-x86.h @@ -42,6 +42,7 @@ #endif
#define NR_PKEYS 16 +#define NR_RESERVED_PKEYS 2 /* pkey-0 and exec-only-pkey */ #define PKEY_BITS_PER_PKEY 2 #define HPAGE_SIZE (1UL<<21) #define PAGE_SIZE 4096 @@ -158,4 +159,18 @@ int pkey_reg_xstate_offset(void) return xstate_offset; }
+static inline int get_arch_reserved_keys(void) +{ + return NR_RESERVED_PKEYS; +} + +void expect_fault_on_read_execonly_key(void *p1, int pkey) +{ + int ptr_contents; + + ptr_contents = read_ptr(p1); + dprintf2("ptr (%p) contents@%d: %x\n", p1, __LINE__, ptr_contents); + expected_pkey_fault(pkey); +} + #endif /* _PKEYS_X86_H */ diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c index 535e464e27e9..57c71056c93d 100644 --- a/tools/testing/selftests/vm/protection_keys.c +++ b/tools/testing/selftests/vm/protection_keys.c @@ -1307,9 +1307,7 @@ void test_executing_on_unreadable_memory(int *ptr, u16 pkey) madvise(p1, PAGE_SIZE, MADV_DONTNEED); lots_o_noops_around_write(&scratch); do_not_expect_pkey_fault("executing on PROT_EXEC memory"); - ptr_contents = read_ptr(p1); - dprintf2("ptr (%p) contents@%d: %x\n", p1, __LINE__, ptr_contents); - expected_pkey_fault(pkey); + expect_fault_on_read_execonly_key(p1, pkey); }
void test_implicit_mprotect_exec_only_memory(int *ptr, u16 pkey) @@ -1336,9 +1334,7 @@ void test_implicit_mprotect_exec_only_memory(int *ptr, u16 pkey) madvise(p1, PAGE_SIZE, MADV_DONTNEED); lots_o_noops_around_write(&scratch); do_not_expect_pkey_fault("executing on PROT_EXEC memory"); - ptr_contents = read_ptr(p1); - dprintf2("ptr (%p) contents@%d: %x\n", p1, __LINE__, ptr_contents); - expected_pkey_fault(UNKNOWN_PKEY); + expect_fault_on_read_execonly_key(p1, UNKNOWN_PKEY);
/* * Put the memory back to non-PROT_EXEC. Should clear the