From 8ac9b9d61f0eceba6ce571e7527798465ae9a7c5 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Wed, 22 Jul 2020 15:53:15 +1000 Subject: selftests/powerpc: Add test of memcmp at end of page Update our memcmp selftest, to test the case where we're comparing up to the end of a page and the subsequent page is not mapped. We have to make sure we don't read off the end of the page and cause a fault. We had a bug there in the past, fixed in commit d9470757398a ("powerpc/64: Fix memcmp reading past the end of src/dest"). Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200722055315.962391-1-mpe@ellerman.id.au --- .../testing/selftests/powerpc/stringloops/memcmp.c | 40 ++++++++++++---------- 1 file changed, 22 insertions(+), 18 deletions(-) (limited to 'tools/testing/selftests/powerpc/stringloops/memcmp.c') diff --git a/tools/testing/selftests/powerpc/stringloops/memcmp.c b/tools/testing/selftests/powerpc/stringloops/memcmp.c index b1fa7546957f..e4605ca850dc 100644 --- a/tools/testing/selftests/powerpc/stringloops/memcmp.c +++ b/tools/testing/selftests/powerpc/stringloops/memcmp.c @@ -2,6 +2,7 @@ #include #include #include +#include #include #include "utils.h" @@ -13,6 +14,9 @@ #define LARGE_MAX_OFFSET 32 #define LARGE_SIZE_START 4096 +/* This is big enough to fit LARGE_SIZE and works on 4K & 64K kernels */ +#define MAP_SIZE (64 * 1024) + #define MAX_OFFSET_DIFF_S1_S2 48 int vmx_count; @@ -68,25 +72,25 @@ static void test_one(char *s1, char *s2, unsigned long max_offset, static int testcase(bool islarge) { - char *s1; - char *s2; - unsigned long i; - - unsigned long comp_size = (islarge ? LARGE_SIZE : SIZE); - unsigned long alloc_size = comp_size + MAX_OFFSET_DIFF_S1_S2; - int iterations = islarge ? LARGE_ITERATIONS : ITERATIONS; - - s1 = memalign(128, alloc_size); - if (!s1) { - perror("memalign"); - exit(1); - } + unsigned long i, comp_size, alloc_size; + char *p, *s1, *s2; + int iterations; - s2 = memalign(128, alloc_size); - if (!s2) { - perror("memalign"); - exit(1); - } + comp_size = (islarge ? LARGE_SIZE : SIZE); + alloc_size = comp_size + MAX_OFFSET_DIFF_S1_S2; + iterations = islarge ? LARGE_ITERATIONS : ITERATIONS; + + p = mmap(NULL, 4 * MAP_SIZE, PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); + FAIL_IF(p == MAP_FAILED); + + /* Put s1/s2 at the end of a page */ + s1 = p + MAP_SIZE - alloc_size; + s2 = p + 3 * MAP_SIZE - alloc_size; + + /* And unmap the subsequent page to force a fault if we overread */ + munmap(p + MAP_SIZE, MAP_SIZE); + munmap(p + 3 * MAP_SIZE, MAP_SIZE); srandom(time(0)); -- cgit v1.2.3 From 872d11bca9c29ed19595c993b9f552ffe9b63dcb Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Mon, 3 Aug 2020 12:07:19 +1000 Subject: selftests/powerpc: Skip vmx/vsx/tar/etc tests on older CPUs Some of our tests use VSX or newer VMX instructions, so need to be skipped on older CPUs to avoid SIGILL'ing. Similarly TAR was added in v2.07, and the PMU event used in the stcx fail test only works on Power8 or later. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200803020719.96114-1-mpe@ellerman.id.au --- tools/testing/selftests/powerpc/math/Makefile | 8 ++++---- tools/testing/selftests/powerpc/math/vmx_preempt.c | 3 +++ tools/testing/selftests/powerpc/math/vmx_signal.c | 3 +++ tools/testing/selftests/powerpc/math/vmx_syscall.c | 7 ++++++- tools/testing/selftests/powerpc/math/vsx_preempt.c | 2 ++ tools/testing/selftests/powerpc/pmu/count_stcx_fail.c | 4 ++++ tools/testing/selftests/powerpc/ptrace/ptrace-tar.c | 3 +++ tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c | 2 ++ tools/testing/selftests/powerpc/stringloops/Makefile | 2 +- tools/testing/selftests/powerpc/stringloops/memcmp.c | 6 ++++++ 10 files changed, 34 insertions(+), 6 deletions(-) (limited to 'tools/testing/selftests/powerpc/stringloops/memcmp.c') diff --git a/tools/testing/selftests/powerpc/math/Makefile b/tools/testing/selftests/powerpc/math/Makefile index 4e2049d2fd8d..fcc91c205984 100644 --- a/tools/testing/selftests/powerpc/math/Makefile +++ b/tools/testing/selftests/powerpc/math/Makefile @@ -11,9 +11,9 @@ $(OUTPUT)/fpu_syscall: fpu_asm.S $(OUTPUT)/fpu_preempt: fpu_asm.S $(OUTPUT)/fpu_signal: fpu_asm.S -$(OUTPUT)/vmx_syscall: vmx_asm.S -$(OUTPUT)/vmx_preempt: vmx_asm.S -$(OUTPUT)/vmx_signal: vmx_asm.S +$(OUTPUT)/vmx_syscall: vmx_asm.S ../utils.c +$(OUTPUT)/vmx_preempt: vmx_asm.S ../utils.c +$(OUTPUT)/vmx_signal: vmx_asm.S ../utils.c $(OUTPUT)/vsx_preempt: CFLAGS += -mvsx -$(OUTPUT)/vsx_preempt: vsx_asm.S +$(OUTPUT)/vsx_preempt: vsx_asm.S ../utils.c diff --git a/tools/testing/selftests/powerpc/math/vmx_preempt.c b/tools/testing/selftests/powerpc/math/vmx_preempt.c index 2e059f154e77..6761d6ce30ec 100644 --- a/tools/testing/selftests/powerpc/math/vmx_preempt.c +++ b/tools/testing/selftests/powerpc/math/vmx_preempt.c @@ -57,6 +57,9 @@ int test_preempt_vmx(void) int i, rc, threads; pthread_t *tids; + // vcmpequd used in vmx_asm.S is v2.07 + SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07)); + threads = sysconf(_SC_NPROCESSORS_ONLN) * THREAD_FACTOR; tids = malloc(threads * sizeof(pthread_t)); FAIL_IF(!tids); diff --git a/tools/testing/selftests/powerpc/math/vmx_signal.c b/tools/testing/selftests/powerpc/math/vmx_signal.c index 785a48e0976f..b340a5c4e79d 100644 --- a/tools/testing/selftests/powerpc/math/vmx_signal.c +++ b/tools/testing/selftests/powerpc/math/vmx_signal.c @@ -96,6 +96,9 @@ int test_signal_vmx(void) void *rc_p; pthread_t *tids; + // vcmpequd used in vmx_asm.S is v2.07 + SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07)); + threads = sysconf(_SC_NPROCESSORS_ONLN) * THREAD_FACTOR; tids = malloc(threads * sizeof(pthread_t)); FAIL_IF(!tids); diff --git a/tools/testing/selftests/powerpc/math/vmx_syscall.c b/tools/testing/selftests/powerpc/math/vmx_syscall.c index 9ee293cc868e..03c78dfe3444 100644 --- a/tools/testing/selftests/powerpc/math/vmx_syscall.c +++ b/tools/testing/selftests/powerpc/math/vmx_syscall.c @@ -49,9 +49,14 @@ int test_vmx_syscall(void) * Setup an environment with much context switching */ pid_t pid2; - pid_t pid = fork(); + pid_t pid; int ret; int child_ret; + + // vcmpequd used in vmx_asm.S is v2.07 + SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07)); + + pid = fork(); FAIL_IF(pid == -1); pid2 = fork(); diff --git a/tools/testing/selftests/powerpc/math/vsx_preempt.c b/tools/testing/selftests/powerpc/math/vsx_preempt.c index 63de9c6e2cd3..d1601bb889d4 100644 --- a/tools/testing/selftests/powerpc/math/vsx_preempt.c +++ b/tools/testing/selftests/powerpc/math/vsx_preempt.c @@ -92,6 +92,8 @@ int test_preempt_vsx(void) int i, rc, threads; pthread_t *tids; + SKIP_IF(!have_hwcap(PPC_FEATURE_HAS_VSX)); + threads = sysconf(_SC_NPROCESSORS_ONLN) * THREAD_FACTOR; tids = malloc(threads * sizeof(pthread_t)); FAIL_IF(!tids); diff --git a/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c b/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c index 7b4ac4537702..2980abca31e0 100644 --- a/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c +++ b/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c @@ -9,6 +9,7 @@ #include #include #include +#include #include "event.h" #include "utils.h" @@ -104,6 +105,9 @@ static int test_body(void) struct event events[3]; u64 overhead; + // The STCX_FAIL event we use works on Power8 or later + SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07)); + setup_event(&events[0], PERF_COUNT_HW_INSTRUCTIONS, PERF_TYPE_HARDWARE, "instructions"); setup_event(&events[1], PERF_COUNT_HW_CPU_CYCLES, PERF_TYPE_HARDWARE, "cycles"); setup_event(&events[2], PM_STCX_FAIL, PERF_TYPE_RAW, "stcx_fail"); diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tar.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tar.c index 58cb1a860cc9..4436ca9d3caf 100644 --- a/tools/testing/selftests/powerpc/ptrace/ptrace-tar.c +++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tar.c @@ -78,6 +78,9 @@ int ptrace_tar(void) pid_t pid; int ret, status; + // TAR was added in v2.07 + SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07)); + shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT); pid = fork(); if (pid < 0) { diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c b/tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c index c4fe0e893306..cb9875f764ca 100644 --- a/tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c +++ b/tools/testing/selftests/powerpc/ptrace/ptrace-vsx.c @@ -61,6 +61,8 @@ int ptrace_vsx(void) pid_t pid; int ret, status, i; + SKIP_IF(!have_hwcap(PPC_FEATURE_HAS_VSX)); + shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT); for (i = 0; i < VEC_MAX; i++) diff --git a/tools/testing/selftests/powerpc/stringloops/Makefile b/tools/testing/selftests/powerpc/stringloops/Makefile index 7fc0623d85c3..9c39f55a58ff 100644 --- a/tools/testing/selftests/powerpc/stringloops/Makefile +++ b/tools/testing/selftests/powerpc/stringloops/Makefile @@ -8,7 +8,7 @@ build_32bit = $(shell if ($(CC) $(CFLAGS) -m32 -o /dev/null memcmp.c >/dev/null TEST_GEN_PROGS := memcmp_64 strlen -$(OUTPUT)/memcmp_64: memcmp.c +$(OUTPUT)/memcmp_64: memcmp.c ../utils.c $(OUTPUT)/memcmp_64: CFLAGS += -m64 -maltivec ifeq ($(build_32bit),1) diff --git a/tools/testing/selftests/powerpc/stringloops/memcmp.c b/tools/testing/selftests/powerpc/stringloops/memcmp.c index e4605ca850dc..979df3d98368 100644 --- a/tools/testing/selftests/powerpc/stringloops/memcmp.c +++ b/tools/testing/selftests/powerpc/stringloops/memcmp.c @@ -4,6 +4,7 @@ #include #include #include +#include #include "utils.h" #define SIZE 256 @@ -151,6 +152,11 @@ static int testcase(bool islarge) static int testcases(void) { +#ifdef __powerpc64__ + // vcmpequd used in memcmp_64.S is v2.07 + SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_2_07)); +#endif + testcase(0); testcase(1); return 0; -- cgit v1.2.3