February 2025 - Linux-kselftest-mirror

selftest/vDSO: vdso_test_abi tests with gcc-13 and pass with clang-19

by Naresh Kamboju

The kselftest-vDSO/vdso_test_abi test encounters failures when built and executed using GCC-13 on armv7 architecture. The issue has been observed on both TI X15 devices and QEMU-armv7. Interestingly, the same test passes without any issues when built using Clang-19.This failure is specific to GCC-13. but test case should have been failed on clang toolchain but it did not. The Clang toolchain likely defaults to the traditional 32-bit time_t on 32-bit Debian Trixie (except x86), leading to an ABI issue similar to older compilers. This is affecting compatibility. This is not a new regression, this report generated on Linux next but also seen on Linux stable tree. Test name: kselftest-vDSO/vdso_test_abi Fails: gcc-13 pass: clang-19 Arnd Bergmann investigated and proposed a patch which fixes the problem. Test regression: selftest-vDSO/vdso_test_abi: Reported-by: Linux Kernel Functional Testing <lkft(a)linaro.org> # selftests: vDSO: vdso_test_abi # TAP version 13 # 1..16 # # [vDSO kselftest] VDSO_VERSION: LINUX_2.6 # # The time is 184285885525887.-5268386858514840748 # ok 1 __vdso_gettimeofday # # clock_id: CLOCK_REALTIME # # The time is 184287230099877759.-1225334784 # ok 2 __vdso_clock_gettime CLOCK_REALTIME # # The vdso resolution is 4294967296 -1225335584 # # The syscall resolution is 4294967296 -1225334784 # not ok 3 __vdso_clock_getres CLOCK_REALTIME # # clock_id: CLOCK_BOOTTIME # # The time is 3253049749439251215.-1225334784 # ok 4 __vdso_clock_gettime CLOCK_BOOTTIME # # The vdso resolution is 4294967296 -1225335584 # # The syscall resolution is 4294967296 -1225334784 # not ok 5 __vdso_clock_getres CLOCK_BOOTTIME # # clock_id: CLOCK_TAI # # The time is 184549377723756415.-1225334784 # ok 6 __vdso_clock_gettime CLOCK_TAI # # The vdso resolution is 4294967296 -1225335584 # # The syscall resolution is 4294967296 -1225334784 # not ok 7 __vdso_clock_getres CLOCK_TAI # # clock_id: CLOCK_REALTIME_COARSE # # The time is 128974845965660031.-1225334784 # ok 8 __vdso_clock_gettime CLOCK_REALTIME_COARSE # # The vdso resolution is 42949672960000000 -1225335584 # # The syscall resolution is 42949672960000000 -1225334784 # not ok 9 __vdso_clock_getres CLOCK_REALTIME_COARSE # # clock_id: CLOCK_MONOTONIC # # The time is 3253311892768162575.-1225334784 # ok 10 __vdso_clock_gettime CLOCK_MONOTONIC # # The vdso resolution is 4294967296 -1225335584 # # The syscall resolution is 4294967296 -1225334784 # not ok 11 __vdso_clock_getres CLOCK_MONOTONIC # # clock_id: CLOCK_MONOTONIC_RAW # # The time is 3253442966580101903.-1225334784 # ok 12 __vdso_clock_gettime CLOCK_MONOTONIC_RAW # # The vdso resolution is 4294967296 -1225335584 # # The syscall resolution is 4294967296 -1225334784 # not ok 13 __vdso_clock_getres CLOCK_MONOTONIC_RAW # # clock_id: CLOCK_MONOTONIC_COARSE # # The time is 3197606291493094159.-1225334784 # ok 14 __vdso_clock_gettime CLOCK_MONOTONIC_COARSE # # The vdso resolution is 42949672960000000 -1225335584 # # The syscall resolution is 42949672960000000 -1225334784 # not ok 15 __vdso_clock_getres CLOCK_MONOTONIC_COARSE # # Couldn't find __vdso_time # ok 16 # SKIP __vdso_time # # 1 skipped test(s) detected. Consider enabling relevant config options to improve coverage. # # Totals: pass:8 fail:7 xfail:0 xpass:0 skip:1 error:0 not ok 3 selftests: vDSO: vdso_test_abi # exit=1 ## Build * test log: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241126/te… * TI x15 test log: https://lkft.validation.linaro.org/scheduler/job/8117196#L7091 * build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2spp0E2mMNQq16RHsbzL… ## Source * git tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git * git sha: df5d6180169ae06a2eac57e33b077ad6f6252440 (this not new issue) * architectures: armv7 * toolchain: gcc-13 (13.3.0) - failed * toolchain: clang ( version: 19.1.7) - pass * devices: Armv7 TI beaglebone, qemu-armv7 -- Linaro LKFT https://lkft.linaro.org

2 weeks, 5 days

2
1
0 0

[PATCH] ww_mutex: convert self-test to KUnit

by Tamir Duberstein

Convert this unit test to a KUnit test. Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- I tested this using: $ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 ww_mutex On success: ; [12:48:16] ================== ww_mutex (5 subtests) =================== ; [12:48:16] ======================= test_mutex ======================== ; [12:48:16] [PASSED] flags=0 ; [12:48:16] [PASSED] flags=1 ; [12:48:16] [PASSED] flags=2 ; [12:48:16] [PASSED] flags=3 ; [12:48:16] [PASSED] flags=4 ; [12:48:17] [PASSED] flags=5 ; [12:48:17] [PASSED] flags=6 ; [12:48:17] [PASSED] flags=7 ; [12:48:17] =================== [PASSED] test_mutex ==================== ; [12:48:17] ========================= test_aa ========================= ; [12:48:17] [PASSED] lock ; [12:48:17] [PASSED] trylock ; [12:48:17] ===================== [PASSED] test_aa ===================== ; [12:48:17] ======================== test_abba ======================== ; [12:48:17] [PASSED] trylock=0,resolve=0 ; [12:48:17] [PASSED] trylock=1,resolve=1 ; [12:48:17] [PASSED] trylock=0,resolve=0 ; [12:48:17] [PASSED] trylock=1,resolve=1 ; [12:48:17] ==================== [PASSED] test_abba ==================== ; [12:48:17] ======================= test_cycle ======================== ; [12:48:17] [PASSED] nthreads=2 ; [12:48:17] =================== [PASSED] test_cycle ==================== ; [12:48:21] ========================= stress ========================== ; [12:48:21] [PASSED] nlocks=16,nthreads_per_cpu=2,flags=1 ; [12:48:23] [PASSED] nlocks=16,nthreads_per_cpu=2,flags=2 ; [12:48:23] [PASSED] nlocks=2046,nthreads_per_cpu=3,flags=7 ; [12:48:23] ===================== [PASSED] stress ====================== ; [12:48:23] ==================== [PASSED] ww_mutex ===================== ; [12:48:23] ============================================================ ; [12:48:23] Testing complete. Ran 18 tests: passed: 18 On failure: --- kernel/locking/Makefile | 3 +- .../locking/{test-ww_mutex.c => ww_mutex_kunit.c} | 311 ++++++++++----------- lib/Kconfig.debug | 12 +- tools/testing/selftests/locking/ww_mutex.sh | 19 -- 4 files changed, 163 insertions(+), 182 deletions(-) diff --git a/kernel/locking/Makefile b/kernel/locking/Makefile index 0db4093d17b8..26af3e88fffa 100644 --- a/kernel/locking/Makefile +++ b/kernel/locking/Makefile @@ -30,5 +30,6 @@ obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o obj-$(CONFIG_QUEUED_RWLOCKS) += qrwlock.o obj-$(CONFIG_LOCK_TORTURE_TEST) += locktorture.o -obj-$(CONFIG_WW_MUTEX_SELFTEST) += test-ww_mutex.o obj-$(CONFIG_LOCK_EVENT_COUNTS) += lock_events.o + +obj-$(CONFIG_WW_MUTEX_KUNIT_TEST) += ww_mutex_kunit.o diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/ww_mutex_kunit.c similarity index 67% rename from kernel/locking/test-ww_mutex.c rename to kernel/locking/ww_mutex_kunit.c index bcb1b9fea588..ba89a4a702f9 100644 --- a/kernel/locking/test-ww_mutex.c +++ b/kernel/locking/ww_mutex_kunit.c @@ -3,10 +3,10 @@ * Module-based API test facility for ww_mutexes */ -#include <linux/kernel.h> - +#include <kunit/test.h> #include <linux/completion.h> #include <linux/delay.h> +#include <linux/kernel.h> #include <linux/kthread.h> #include <linux/module.h> #include <linux/prandom.h> @@ -54,12 +54,39 @@ static void test_mutex_work(struct work_struct *work) ww_mutex_unlock(&mtx->mutex); } -static int __test_mutex(unsigned int flags) +static const unsigned int *gen_range( + unsigned int *storage, + const unsigned int min, + const unsigned int max, + const int *prev) +{ + if (prev != NULL) { + if (*prev >= max) + return NULL; + *storage = *prev + 1; + } else { + *storage = min; + } + return storage; +} + +static const void *test_mutex_gen_params(const void *prev, char *desc) +{ + static unsigned int storage; + const unsigned int *next = gen_range(&storage, 0, __TEST_MTX_LAST - 1, prev); + + if (next != NULL) + snprintf(desc, KUNIT_PARAM_DESC_SIZE, "flags=%x", *next); + return next; +} + +static void test_mutex(struct kunit *test) { #define TIMEOUT (HZ / 16) + const unsigned int *param = test->param_value; + const unsigned int flags = *param; struct test_mutex mtx; struct ww_acquire_ctx ctx; - int ret; ww_mutex_init(&mtx.mutex, &ww_class); if (flags & TEST_MTX_CTX) @@ -79,53 +106,42 @@ static int __test_mutex(unsigned int flags) if (flags & TEST_MTX_SPIN) { unsigned long timeout = jiffies + TIMEOUT; - ret = 0; do { if (completion_done(&mtx.done)) { - ret = -EINVAL; + KUNIT_FAIL(test, "mutual exclusion failure"); break; } cond_resched(); } while (time_before(jiffies, timeout)); } else { - ret = wait_for_completion_timeout(&mtx.done, TIMEOUT); + KUNIT_EXPECT_EQ(test, wait_for_completion_timeout(&mtx.done, TIMEOUT), 0); } ww_mutex_unlock(&mtx.mutex); if (flags & TEST_MTX_CTX) ww_acquire_fini(&ctx); - if (ret) { - pr_err("%s(flags=%x): mutual exclusion failure\n", - __func__, flags); - ret = -EINVAL; - } - flush_work(&mtx.work); destroy_work_on_stack(&mtx.work); - return ret; #undef TIMEOUT } -static int test_mutex(void) +static const void *test_aa_gen_params(const void *prev, char *desc) { - int ret; - int i; + static unsigned int storage; + const unsigned int *next = gen_range(&storage, 0, 1, prev); - for (i = 0; i < __TEST_MTX_LAST; i++) { - ret = __test_mutex(i); - if (ret) - return ret; - } - - return 0; + if (next != NULL) + snprintf(desc, KUNIT_PARAM_DESC_SIZE, *next ? "trylock" : "lock"); + return next; } -static int test_aa(bool trylock) +static void test_aa(struct kunit *test) { + const unsigned int *param = test->param_value; + const bool trylock = *param; struct ww_mutex mutex; struct ww_acquire_ctx ctx; int ret; - const char *from = trylock ? "trylock" : "lock"; ww_mutex_init(&mutex, &ww_class); ww_acquire_init(&ctx, &ww_class); @@ -133,46 +149,42 @@ static int test_aa(bool trylock) if (!trylock) { ret = ww_mutex_lock(&mutex, &ctx); if (ret) { - pr_err("%s: initial lock failed!\n", __func__); + KUNIT_FAIL(test, "initial lock failed, ret=%d", ret); goto out; } } else { ret = !ww_mutex_trylock(&mutex, &ctx); if (ret) { - pr_err("%s: initial trylock failed!\n", __func__); + KUNIT_FAIL(test, "initial trylock failed, ret=%d", ret); goto out; } } - if (ww_mutex_trylock(&mutex, NULL)) { - pr_err("%s: trylocked itself without context from %s!\n", __func__, from); + ret = ww_mutex_trylock(&mutex, NULL); + if (ret) { + KUNIT_FAIL(test, "trylocked itself without context, ret=%d", ret); ww_mutex_unlock(&mutex); - ret = -EINVAL; goto out; } - if (ww_mutex_trylock(&mutex, &ctx)) { - pr_err("%s: trylocked itself with context from %s!\n", __func__, from); + ret = ww_mutex_trylock(&mutex, &ctx); + if (ret) { + KUNIT_FAIL(test, "trylocked itself with context, ret=%d", ret); ww_mutex_unlock(&mutex); - ret = -EINVAL; goto out; } ret = ww_mutex_lock(&mutex, &ctx); if (ret != -EALREADY) { - pr_err("%s: missed deadlock for recursing, ret=%d from %s\n", - __func__, ret, from); + KUNIT_FAIL(test, "missed deadlock for recursing, ret=%d", ret); if (!ret) ww_mutex_unlock(&mutex); - ret = -EINVAL; goto out; } ww_mutex_unlock(&mutex); - ret = 0; out: ww_acquire_fini(&ctx); - return ret; } struct test_abba { @@ -217,11 +229,28 @@ static void test_abba_work(struct work_struct *work) abba->result = err; } -static int test_abba(bool trylock, bool resolve) +static const void *test_abba_gen_params(const void *prev, char *desc) { + static unsigned int storage; + const unsigned int *next = gen_range(&storage, 0b00, 0b11, prev); + + if (next != NULL) { + const bool trylock = *next & 0b01 >> 0; + const bool resolve = *next & 0b10 >> 1; + + snprintf(desc, KUNIT_PARAM_DESC_SIZE, "trylock=%d,resolve=%d", trylock, resolve); + } + return next; +} + +static void test_abba(struct kunit *test) +{ + const unsigned int *param = test->param_value; + const bool trylock = *param & 0b01 >> 0; + const bool resolve = *param & 0b10 >> 1; struct test_abba abba; struct ww_acquire_ctx ctx; - int err, ret; + int err; ww_mutex_init(&abba.a_mutex, &ww_class); ww_mutex_init(&abba.b_mutex, &ww_class); @@ -259,21 +288,17 @@ static int test_abba(bool trylock, bool resolve) flush_work(&abba.work); destroy_work_on_stack(&abba.work); - ret = 0; if (resolve) { if (err || abba.result) { - pr_err("%s: failed to resolve ABBA deadlock, A err=%d, B err=%d\n", - __func__, err, abba.result); - ret = -EINVAL; + KUNIT_FAIL(test, "failed to resolve ABBA deadlock, A err=%d, B err=%d", + err, abba.result); } } else { if (err != -EDEADLK && abba.result != -EDEADLK) { - pr_err("%s: missed ABBA deadlock, A err=%d, B err=%d\n", - __func__, err, abba.result); - ret = -EINVAL; + KUNIT_FAIL(test, "missed ABBA deadlock, A err=%d, B err=%d", + err, abba.result); } } - return ret; } struct test_cycle { @@ -314,15 +339,25 @@ static void test_cycle_work(struct work_struct *work) cycle->result = err ?: erra; } -static int __test_cycle(unsigned int nthreads) +static const void *test_cycle_gen_params(const void *prev, char *desc) { + static unsigned int storage; + const unsigned int *next = gen_range(&storage, 2, num_online_cpus(), prev); + + if (next != NULL) + snprintf(desc, KUNIT_PARAM_DESC_SIZE, "nthreads=%d", *next); + return next; +} + +static void test_cycle(struct kunit *test) +{ + const unsigned int *param = test->param_value; + const unsigned int nthreads = *param; struct test_cycle *cycles; unsigned int n, last = nthreads - 1; - int ret; - cycles = kmalloc_array(nthreads, sizeof(*cycles), GFP_KERNEL); - if (!cycles) - return -ENOMEM; + cycles = kunit_kmalloc_array(test, nthreads, sizeof(*cycles), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, cycles); for (n = 0; n < nthreads; n++) { struct test_cycle *cycle = &cycles[n]; @@ -348,41 +383,24 @@ static int __test_cycle(unsigned int nthreads) flush_workqueue(wq); - ret = 0; for (n = 0; n < nthreads; n++) { struct test_cycle *cycle = &cycles[n]; if (!cycle->result) continue; - pr_err("cyclic deadlock not resolved, ret[%d/%d] = %d\n", - n, nthreads, cycle->result); - ret = -EINVAL; + KUNIT_FAIL(test, "cyclic deadlock not resolved, ret[%d/%d] = %d", + n, nthreads, cycle->result); break; } for (n = 0; n < nthreads; n++) ww_mutex_destroy(&cycles[n].a_mutex); - kfree(cycles); - return ret; -} - -static int test_cycle(unsigned int ncpus) -{ - unsigned int n; - int ret; - - for (n = 2; n <= ncpus + 1; n++) { - ret = __test_cycle(n); - if (ret) - return ret; - } - - return 0; } struct stress { struct work_struct work; + struct kunit *test; struct ww_mutex *locks; unsigned long timeout; int nlocks; @@ -401,12 +419,12 @@ static inline u32 prandom_u32_below(u32 ceil) return ret; } -static int *get_random_order(int count) +static int *get_random_order(struct kunit *test, int count) { int *order; int n, r; - order = kmalloc_array(count, sizeof(*order), GFP_KERNEL); + order = kunit_kmalloc_array(test, count, sizeof(*order), GFP_KERNEL); if (!order) return order; @@ -435,7 +453,7 @@ static void stress_inorder_work(struct work_struct *work) struct ww_acquire_ctx ctx; int *order; - order = get_random_order(nlocks); + order = get_random_order(stress->test, nlocks); if (!order) return; @@ -472,13 +490,10 @@ static void stress_inorder_work(struct work_struct *work) ww_acquire_fini(&ctx); if (err) { - pr_err_once("stress (%s) failed with %d\n", - __func__, err); + KUNIT_FAIL(stress->test, "lock[%d] failed, err=%d", n, err); break; } } while (!time_after(jiffies, stress->timeout)); - - kfree(order); } struct reorder_lock { @@ -495,19 +510,16 @@ static void stress_reorder_work(struct work_struct *work) int *order; int n, err; - order = get_random_order(stress->nlocks); - if (!order) - return; + order = get_random_order(stress->test, stress->nlocks); + KUNIT_ASSERT_NOT_NULL(stress->test, order); for (n = 0; n < stress->nlocks; n++) { - ll = kmalloc(sizeof(*ll), GFP_KERNEL); - if (!ll) - goto out; + ll = kunit_kmalloc(stress->test, sizeof(*ll), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(stress->test, ll); ll->lock = &stress->locks[order[n]]; list_add(&ll->link, &locks); } - kfree(order); order = NULL; do { @@ -523,8 +535,7 @@ static void stress_reorder_work(struct work_struct *work) ww_mutex_unlock(ln->lock); if (err != -EDEADLK) { - pr_err_once("stress (%s) failed with %d\n", - __func__, err); + KUNIT_FAIL(stress->test, "lock failed, err=%d", err); break; } @@ -538,11 +549,6 @@ static void stress_reorder_work(struct work_struct *work) ww_acquire_fini(&ctx); } while (!time_after(jiffies, stress->timeout)); - -out: - list_for_each_entry_safe(ll, ln, &locks, link) - kfree(ll); - kfree(order); } static void stress_one_work(struct work_struct *work) @@ -558,8 +564,7 @@ static void stress_one_work(struct work_struct *work) dummy_load(stress); ww_mutex_unlock(lock); } else { - pr_err_once("stress (%s) failed with %d\n", - __func__, err); + KUNIT_FAIL(stress->test, "lock failed, err=%d", err); break; } } while (!time_after(jiffies, stress->timeout)); @@ -570,22 +575,41 @@ static void stress_one_work(struct work_struct *work) #define STRESS_ONE BIT(2) #define STRESS_ALL (STRESS_INORDER | STRESS_REORDER | STRESS_ONE) -static int stress(int nlocks, int nthreads, unsigned int flags) +struct stress_case { + int nlocks; + int nthreads_per_cpu; + unsigned int flags; +}; + +static const struct stress_case stress_cases[] = { + { 16, 2, STRESS_INORDER }, + { 16, 2, STRESS_REORDER }, + { 2046, hweight32(STRESS_ALL), STRESS_ALL }, +}; + +static void stress_case_to_desc(const struct stress_case *param, char *desc) { + snprintf(desc, KUNIT_PARAM_DESC_SIZE, "nlocks=%d,nthreads_per_cpu=%d,flags=%x", + param->nlocks, param->nthreads_per_cpu, param->flags); +} + +KUNIT_ARRAY_PARAM(stress_cases, stress_cases, stress_case_to_desc); + +static void stress(struct kunit *test) +{ + const struct stress_case *param = test->param_value; + const int nlocks = param->nlocks; + int nthreads = param->nthreads_per_cpu * num_online_cpus(); + const unsigned int flags = param->flags; struct ww_mutex *locks; struct stress *stress_array; int n, count; - locks = kmalloc_array(nlocks, sizeof(*locks), GFP_KERNEL); - if (!locks) - return -ENOMEM; + locks = kunit_kmalloc_array(test, nlocks, sizeof(*locks), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, locks); - stress_array = kmalloc_array(nthreads, sizeof(*stress_array), - GFP_KERNEL); - if (!stress_array) { - kfree(locks); - return -ENOMEM; - } + stress_array = kunit_kmalloc_array(test, nthreads, sizeof(*stress_array), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, stress_array); for (n = 0; n < nlocks; n++) ww_mutex_init(&locks[n], &ww_class); @@ -617,6 +641,7 @@ static int stress(int nlocks, int nthreads, unsigned int flags) stress = &stress_array[count++]; INIT_WORK(&stress->work, fn); + stress->test = test; stress->locks = locks; stress->nlocks = nlocks; stress->timeout = jiffies + 2*HZ; @@ -629,70 +654,42 @@ static int stress(int nlocks, int nthreads, unsigned int flags) for (n = 0; n < nlocks; n++) ww_mutex_destroy(&locks[n]); - kfree(stress_array); - kfree(locks); - - return 0; } -static int __init test_ww_mutex_init(void) +static int ww_mutex_suite_init(struct kunit_suite *suite) { - int ncpus = num_online_cpus(); - int ret, i; - - printk(KERN_INFO "Beginning ww mutex selftests\n"); - - prandom_seed_state(&rng, get_random_u64()); - wq = alloc_workqueue("test-ww_mutex", WQ_UNBOUND, 0); if (!wq) return -ENOMEM; - ret = test_mutex(); - if (ret) - return ret; - - ret = test_aa(false); - if (ret) - return ret; - - ret = test_aa(true); - if (ret) - return ret; - - for (i = 0; i < 4; i++) { - ret = test_abba(i & 1, i & 2); - if (ret) - return ret; - } - - ret = test_cycle(ncpus); - if (ret) - return ret; - - ret = stress(16, 2*ncpus, STRESS_INORDER); - if (ret) - return ret; - - ret = stress(16, 2*ncpus, STRESS_REORDER); - if (ret) - return ret; - - ret = stress(2046, hweight32(STRESS_ALL)*ncpus, STRESS_ALL); - if (ret) - return ret; + prandom_seed_state(&rng, get_random_u64()); - printk(KERN_INFO "All ww mutex selftests passed\n"); return 0; } -static void __exit test_ww_mutex_exit(void) +static void ww_mutex_suite_exit(struct kunit_suite *suite) { - destroy_workqueue(wq); + if (wq) + destroy_workqueue(wq); } -module_init(test_ww_mutex_init); -module_exit(test_ww_mutex_exit); +static struct kunit_case ww_mutex_cases[] = { + KUNIT_CASE_PARAM(test_mutex, test_mutex_gen_params), + KUNIT_CASE_PARAM(test_aa, test_aa_gen_params), + KUNIT_CASE_PARAM(test_abba, test_abba_gen_params), + KUNIT_CASE_PARAM(test_cycle, test_cycle_gen_params), + KUNIT_CASE_PARAM_ATTR(stress, stress_cases_gen_params, {.speed = KUNIT_SPEED_SLOW}), + {}, +}; + +static struct kunit_suite ww_mutex_suite = { + .name = "ww_mutex", + .suite_init = ww_mutex_suite_init, + .suite_exit = ww_mutex_suite_exit, + .test_cases = ww_mutex_cases, +}; + +kunit_test_suite(ww_mutex_suite); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Intel Corporation"); diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 1af972a92d06..a7edcbdc1428 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1586,16 +1586,18 @@ config LOCK_TORTURE_TEST Say M if you want these torture tests to build as a module. Say N if you are unsure. -config WW_MUTEX_SELFTEST - tristate "Wait/wound mutex selftests" +config WW_MUTEX_KUNIT_TEST + tristate "KUnit test for wait/wound mutex" if !KUNIT_ALL_TESTS + depends on KUNIT + default KUNIT_ALL_TESTS help - This option provides a kernel module that runs tests on the - on the struct ww_mutex locking API. + This option provides a KUnit test that exercises the struct + ww_mutex locking API. It is recommended to enable DEBUG_WW_MUTEX_SLOWPATH in conjunction with this test harness. - Say M if you want these self tests to build as a module. + Say M if you want these tests to build as a module. Say N if you are unsure. config SCF_TORTURE_TEST diff --git a/tools/testing/selftests/locking/ww_mutex.sh b/tools/testing/selftests/locking/ww_mutex.sh deleted file mode 100755 index 91e4ac7566af..000000000000 --- a/tools/testing/selftests/locking/ww_mutex.sh +++ /dev/null @@ -1,19 +0,0 @@ -#!/bin/sh -# SPDX-License-Identifier: GPL-2.0 - -# Kselftest framework requirement - SKIP code is 4. -ksft_skip=4 - -# Runs API tests for struct ww_mutex (Wait/Wound mutexes) -if ! /sbin/modprobe -q -n test-ww_mutex; then - echo "ww_mutex: module test-ww_mutex is not found [SKIP]" - exit $ksft_skip -fi - -if /sbin/modprobe -q test-ww_mutex; then - /sbin/modprobe -q -r test-ww_mutex - echo "locking/ww_mutex: ok" -else - echo "locking/ww_mutex: [FAIL]" - exit 1 -fi --- base-commit: a64dcfb451e254085a7daee5fe51bf22959d52d3 change-id: 20250208-ww_mutex-kunit-convert-71842a7a6be2 Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

2 weeks, 5 days

4
6
0 0

[PATCH net-next v7 3/3] selftests: drv-net: Test queue xsk attribute

by Joe Damato

Test that queues which are used for AF_XDP have the xsk nest attribute. The attribute is currently empty, but its existence means the AF_XDP is being used for the queue. Enable CONFIG_XDP_SOCKETS for selftests/drivers/net tests, as well. Signed-off-by: Joe Damato <jdamato(a)fastly.com> Suggested-by: Jakub Kicinski <kuba(a)kernel.org> --- v7: - Added CONFIG_XDP_SOCKETS=y to selftests/drivers/net/config. - Updated xdp_helper to return -1 on AF_XDP non-existence, 1 for other failures. - Updated queues.py to skip if AF_XDP does not not exist, fail otherwise. v3: - Change comment style of helper C program to avoid kdoc warnings as suggested by Jakub. No other changes. v2: - Updated the Python test after changes to patch 1 which expose an empty nest - Updated Python test with general Python coding feedback .../testing/selftests/drivers/net/.gitignore | 2 + tools/testing/selftests/drivers/net/Makefile | 3 + tools/testing/selftests/drivers/net/config | 1 + tools/testing/selftests/drivers/net/queues.py | 42 +++++++- .../selftests/drivers/net/xdp_helper.c | 98 +++++++++++++++++++ 5 files changed, 143 insertions(+), 3 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/.gitignore create mode 100644 tools/testing/selftests/drivers/net/xdp_helper.c diff --git a/tools/testing/selftests/drivers/net/.gitignore b/tools/testing/selftests/drivers/net/.gitignore new file mode 100644 index 000000000000..ec746f374e85 --- /dev/null +++ b/tools/testing/selftests/drivers/net/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +xdp_helper diff --git a/tools/testing/selftests/drivers/net/Makefile b/tools/testing/selftests/drivers/net/Makefile index 28b6d47f812d..68127c449c24 100644 --- a/tools/testing/selftests/drivers/net/Makefile +++ b/tools/testing/selftests/drivers/net/Makefile @@ -1,10 +1,13 @@ # SPDX-License-Identifier: GPL-2.0 +CFLAGS += $(KHDR_INCLUDES) TEST_INCLUDES := $(wildcard lib/py/*.py) \ $(wildcard lib/sh/*.sh) \ ../../net/net_helper.sh \ ../../net/lib.sh \ +TEST_GEN_PROGS := xdp_helper + TEST_PROGS := \ netcons_basic.sh \ netcons_fragmented_msg.sh \ diff --git a/tools/testing/selftests/drivers/net/config b/tools/testing/selftests/drivers/net/config index a2d8af60876d..f27172ddee0a 100644 --- a/tools/testing/selftests/drivers/net/config +++ b/tools/testing/selftests/drivers/net/config @@ -4,3 +4,4 @@ CONFIG_CONFIGFS_FS=y CONFIG_NETCONSOLE=m CONFIG_NETCONSOLE_DYNAMIC=y CONFIG_NETCONSOLE_EXTENDED_LOG=y +CONFIG_XDP_SOCKETS=y diff --git a/tools/testing/selftests/drivers/net/queues.py b/tools/testing/selftests/drivers/net/queues.py index 38303da957ee..5fdfebc6415f 100755 --- a/tools/testing/selftests/drivers/net/queues.py +++ b/tools/testing/selftests/drivers/net/queues.py @@ -2,13 +2,16 @@ # SPDX-License-Identifier: GPL-2.0 from lib.py import ksft_disruptive, ksft_exit, ksft_run -from lib.py import ksft_eq, ksft_raises, KsftSkipEx +from lib.py import ksft_eq, ksft_raises, KsftSkipEx, KsftFailEx from lib.py import EthtoolFamily, NetdevFamily, NlError from lib.py import NetDrvEnv from lib.py import cmd, defer, ip import errno import glob - +import os +import socket +import struct +import subprocess def sys_get_queues(ifname, qtype='rx') -> int: folders = glob.glob(f'/sys/class/net/{ifname}/queues/{qtype}-*') @@ -21,6 +24,39 @@ def nl_get_queues(cfg, nl, qtype='rx'): return len([q for q in queues if q['type'] == qtype]) return None +def check_xdp(cfg, nl, xdp_queue_id=0) -> None: + test_dir = os.path.dirname(os.path.realpath(__file__)) + xdp = subprocess.Popen([f"{test_dir}/xdp_helper", f"{cfg.ifindex}", f"{xdp_queue_id}"], + stdin=subprocess.PIPE, stdout=subprocess.PIPE, bufsize=1, + text=True) + defer(xdp.kill) + + stdout, stderr = xdp.communicate(timeout=10) + rx = tx = False + + if xdp.returncode == 255: + raise KsftSkipEx('AF_XDP unsupported') + elif xdp.returncode > 0: + raise KsftFailEx('unable to create AF_XDP socket') + + queues = nl.queue_get({'ifindex': cfg.ifindex}, dump=True) + if not queues: + raise KsftSkipEx("Netlink reports no queues") + + for q in queues: + if q['id'] == 0: + if q['type'] == 'rx': + rx = True + if q['type'] == 'tx': + tx = True + + ksft_eq(q['xsk'], {}) + else: + if 'xsk' in q: + _fail("Check failed: xsk attribute set.") + + ksft_eq(rx, True) + ksft_eq(tx, True) def get_queues(cfg, nl) -> None: snl = NetdevFamily(recv_size=4096) @@ -81,7 +117,7 @@ def check_down(cfg, nl) -> None: def main() -> None: with NetDrvEnv(__file__, queue_count=100) as cfg: - ksft_run([get_queues, addremove_queues, check_down], args=(cfg, NetdevFamily())) + ksft_run([get_queues, addremove_queues, check_down, check_xdp], args=(cfg, NetdevFamily())) ksft_exit() diff --git a/tools/testing/selftests/drivers/net/xdp_helper.c b/tools/testing/selftests/drivers/net/xdp_helper.c new file mode 100644 index 000000000000..2a40cc35d800 --- /dev/null +++ b/tools/testing/selftests/drivers/net/xdp_helper.c @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/mman.h> +#include <sys/socket.h> +#include <linux/if_xdp.h> +#include <linux/if_link.h> +#include <net/if.h> +#include <inttypes.h> + +#define UMEM_SZ (1U << 16) +#define NUM_DESC (UMEM_SZ / 2048) + +/* this is a simple helper program that creates an XDP socket and does the + * minimum necessary to get bind() to succeed. + * + * this test program is not intended to actually process packets, but could be + * extended in the future if that is actually needed. + * + * it is used by queues.py to ensure the xsk netlinux attribute is set + * correctly. + */ +int main(int argc, char **argv) +{ + struct xdp_umem_reg umem_reg = { 0 }; + struct sockaddr_xdp sxdp = { 0 }; + int num_desc = NUM_DESC; + void *umem_area; + int ifindex; + int sock_fd; + int queue; + char byte; + + if (argc != 3) { + fprintf(stderr, "Usage: %s ifindex queue_id", argv[0]); + return 1; + } + + sock_fd = socket(AF_XDP, SOCK_RAW, 0); + if (sock_fd < 0) { + perror("socket creation failed"); + /* if the kernel doesnt support AF_XDP, let the test program + * know with -1. All other error paths return 1. + */ + if (errno == EAFNOSUPPORT) + return -1; + return 1; + } + + ifindex = atoi(argv[1]); + queue = atoi(argv[2]); + + umem_area = mmap(NULL, UMEM_SZ, PROT_READ | PROT_WRITE, MAP_PRIVATE | + MAP_ANONYMOUS, -1, 0); + if (umem_area == MAP_FAILED) { + perror("mmap failed"); + return 1; + } + + umem_reg.addr = (uintptr_t)umem_area; + umem_reg.len = UMEM_SZ; + umem_reg.chunk_size = 2048; + umem_reg.headroom = 0; + + setsockopt(sock_fd, SOL_XDP, XDP_UMEM_REG, &umem_reg, + sizeof(umem_reg)); + setsockopt(sock_fd, SOL_XDP, XDP_UMEM_FILL_RING, &num_desc, + sizeof(num_desc)); + setsockopt(sock_fd, SOL_XDP, XDP_UMEM_COMPLETION_RING, &num_desc, + sizeof(num_desc)); + setsockopt(sock_fd, SOL_XDP, XDP_RX_RING, &num_desc, sizeof(num_desc)); + + sxdp.sxdp_family = AF_XDP; + sxdp.sxdp_ifindex = ifindex; + sxdp.sxdp_queue_id = queue; + sxdp.sxdp_flags = 0; + + if (bind(sock_fd, (struct sockaddr *)&sxdp, sizeof(sxdp)) != 0) { + munmap(umem_area, UMEM_SZ); + perror("bind failed"); + close(sock_fd); + return 1; + } + + /* give the parent program some data when the socket is ready*/ + fprintf(stdout, "%d\n", sock_fd); + + /* parent program will write a byte to stdin when its ready for this + * helper to exit + */ + read(STDIN_FILENO, &byte, 1); + + close(sock_fd); + return 0; +} -- 2.43.0

2 weeks, 6 days

1
0
0 0

[PATCH net-next v7 0/3] netdev-genl: Add an xsk attribute to queues

by Joe Damato

Greetings: Welcome to v7. Added CONFIG_XDP_SOCKETS to the selftests/driver/net kernel config in patch 3. Updated the xdp_helper.c to return -1 on AF_XDP non-existence, and updated queues.py to skip the test if AF_XDP does not exist (but fail in other failure cases). Tested on kernels with and without CONFIG_XDP_SOCKETS enabled. This is an attempt to followup on something Jakub asked me about [1], adding an xsk attribute to queues and more clearly documenting which queues are linked to NAPIs... After the RFC [2], Jakub suggested creating an empty nest for queues which have a pool, so I've adjusted this version to work that way. The nest can be extended in the future to express attributes about XSK as needed. Queues which are not used for AF_XDP do not have the xsk attribute present. I've run the included test on: - my mlx5 machine (via NETIF=) - without setting NETIF And the test seems to pass in both cases. Thanks, Joe [1]: https://lore.kernel.org/netdev/20250113143109.60afa59a@kernel.org/ [2]: https://lore.kernel.org/netdev/20250129172431.65773-1-jdamato@fastly.com/ v7: - Added CONFIG_XDP_SOCKETS to selftests/driver/net/config as suggested by Stanislav. - Updated xdp_helper.c to return -1 for AF_XDP non-existence, but 1 for other failures. - Updated queues.py to mark test as skipped if AF_XDP does not exist. v6: https://lore.kernel.org/bpf/20250210193903.16235-1-jdamato@fastly.com/ - Added ifdefs for CONFIG_XDP_SOCKETS in patch 2 as Stanislav suggested. v5: https://lore.kernel.org/bpf/20250208041248.111118-1-jdamato@fastly.com/ - Removed unused ret variable from patch 2 as Simon suggested. v4: https://lore.kernel.org/lkml/20250207030916.32751-1-jdamato@fastly.com/ - Add patch 1, as suggested by Jakub, which adds an empty nest helper. - Use the helper in patch 2, which makes the code cleaner and prevents a possible bug. v3: https://lore.kernel.org/netdev/20250204191108.161046-1-jdamato@fastly.com/ - Change comment format in patch 2 to avoid kdoc warnings. No other changes. v2: https://lore.kernel.org/all/20250203185828.19334-1-jdamato@fastly.com/ - Switched from RFC to actual submission now that net-next is open - Adjusted patch 1 to include an empty nest as suggested by Jakub - Adjusted patch 2 to update the test based on changes to patch 1, and to incorporate some Python feedback from Jakub :) rfc: https://lore.kernel.org/netdev/20250129172431.65773-1-jdamato@fastly.com/ Joe Damato (3): netlink: Add nla_put_empty_nest helper netdev-genl: Add an XSK attribute to queues selftests: drv-net: Test queue xsk attribute Documentation/netlink/specs/netdev.yaml | 13 ++- include/net/netlink.h | 15 +++ include/uapi/linux/netdev.h | 6 ++ net/core/netdev-genl.c | 12 +++ tools/include/uapi/linux/netdev.h | 6 ++ .../testing/selftests/drivers/net/.gitignore | 2 + tools/testing/selftests/drivers/net/Makefile | 3 + tools/testing/selftests/drivers/net/config | 1 + tools/testing/selftests/drivers/net/queues.py | 42 +++++++- .../selftests/drivers/net/xdp_helper.c | 98 +++++++++++++++++++ 10 files changed, 194 insertions(+), 4 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/.gitignore create mode 100644 tools/testing/selftests/drivers/net/xdp_helper.c base-commit: 4e41231249f4083a095085ff86e317e29313c2c3 -- 2.43.0

2 weeks, 6 days

1
0
0 0

[PATCH net-next v6 0/3] netdev-genl: Add an xsk attribute to queues

by Joe Damato

Greetings Welcome to v6. Added ifdefs to patch 2 and built with CONFIG_XDP_SOCKETS both enabled and disabled to confirm it builds cleanly. No other changes. This is an attempt to followup on something Jakub asked me about [1], adding an xsk attribute to queues and more clearly documenting which queues are linked to NAPIs... After the RFC [2], Jakub suggested creating an empty nest for queues which have a pool, so I've adjusted this version to work that way. The nest can be extended in the future to express attributes about XSK as needed. Queues which are not used for AF_XDP do not have the xsk attribute present. I've run the included test on: - my mlx5 machine (via NETIF=) - without setting NETIF And the test seems to pass in both cases. Thanks, Joe [1]: https://lore.kernel.org/netdev/20250113143109.60afa59a@kernel.org/ [2]: https://lore.kernel.org/netdev/20250129172431.65773-1-jdamato@fastly.com/ v6: - Added ifdefs for CONFIG_XDP_SOCKETS in patch 2 as Stanislav suggested. v5: https://lore.kernel.org/bpf/20250208041248.111118-1-jdamato@fastly.com/ - Removed unused ret variable from patch 2 as Simon suggested. v4: https://lore.kernel.org/lkml/20250207030916.32751-1-jdamato@fastly.com/ - Add patch 1, as suggested by Jakub, which adds an empty nest helper. - Use the helper in patch 2, which makes the code cleaner and prevents a possible bug. v3: https://lore.kernel.org/netdev/20250204191108.161046-1-jdamato@fastly.com/ - Change comment format in patch 2 to avoid kdoc warnings. No other changes. v2: https://lore.kernel.org/all/20250203185828.19334-1-jdamato@fastly.com/ - Switched from RFC to actual submission now that net-next is open - Adjusted patch 1 to include an empty nest as suggested by Jakub - Adjusted patch 2 to update the test based on changes to patch 1, and to incorporate some Python feedback from Jakub :) rfc: https://lore.kernel.org/netdev/20250129172431.65773-1-jdamato@fastly.com/ Joe Damato (3): netlink: Add nla_put_empty_nest helper netdev-genl: Add an XSK attribute to queues selftests: drv-net: Test queue xsk attribute Documentation/netlink/specs/netdev.yaml | 13 ++- include/net/netlink.h | 15 ++++ include/uapi/linux/netdev.h | 6 ++ net/core/netdev-genl.c | 12 +++ tools/include/uapi/linux/netdev.h | 6 ++ .../testing/selftests/drivers/net/.gitignore | 2 + tools/testing/selftests/drivers/net/Makefile | 3 + tools/testing/selftests/drivers/net/queues.py | 35 +++++++- .../selftests/drivers/net/xdp_helper.c | 89 +++++++++++++++++++ 9 files changed, 178 insertions(+), 3 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/.gitignore create mode 100644 tools/testing/selftests/drivers/net/xdp_helper.c base-commit: 39f54262ba499d862420a97719d2f0eea0cbd394 -- 2.43.0

2 weeks, 6 days

4
9
0 0

[PATCH v5 1/2] selftests/futex: Add ASSERT_ macros

by André Almeida

Create ASSERT_{EQ, NE, TRUE, FALSE} macros to make test creation easier. Signed-off-by: André Almeida <andrealmeid(a)igalia.com> --- .../testing/selftests/futex/include/logging.h | 38 +++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/tools/testing/selftests/futex/include/logging.h b/tools/testing/selftests/futex/include/logging.h index 874c69ce5cce..a19755622a87 100644 --- a/tools/testing/selftests/futex/include/logging.h +++ b/tools/testing/selftests/futex/include/logging.h @@ -23,6 +23,44 @@ #include <linux/futex.h> #include "kselftest.h" +#define ASSERT_EQ(var, value) \ +do { \ + if (var != value) { \ + ksft_test_result_fail("%s: expected %ld, but %s has %ld\n", \ + __func__, (long) value, #var, \ + (long) var); \ + return; \ + } \ +} while (0) + +#define ASSERT_NE(var, value) \ +do { \ + if (var == value) { \ + ksft_test_result_fail("%s: expected not %ld, but %s has %ld\n", \ + __func__, (long) value, #var, \ + (long) var); \ + return; \ + } \ +} while (0) + +#define ASSERT_TRUE(var) \ +do { \ + if ((var) == 0) { \ + ksft_test_result_fail("%s: expected %s to be true\n", \ + __func__, #var); \ + return; \ + } \ +} while (0) + +#define ASSERT_FALSE(var) \ +do { \ + if (var) { \ + ksft_test_result_fail("%s: expected %s to be false\n", \ + __func__, #var); \ + return; \ + } \ +} while (0) + /* * Define PASS, ERROR, and FAIL strings with and without color escape * sequences, default to no color. -- 2.48.1

2 weeks, 6 days

1
1
0 0

[PATCH 0/2] kunit: qemu_configs: Add MIPS configurations

by Thomas Weißschuh

Add basic support to run various MIPS variants via kunit_tool using the virtualized malta platform. Various kunit tests from drivers/firmware/cirrus/ are failing on MIPS. They are fixed in [0]. [0] https://lore.kernel.org/lkml/20250211-cs_dsp-kunit-strings-v1-1-d9bc2035d15… Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- Thomas Weißschuh (2): MIPS: mm: Avoid blocking DMA zone with memory map memblock allocation kunit: qemu_configs: Add MIPS configurations arch/mips/mm/init.c | 2 ++ tools/testing/kunit/qemu_configs/mips.py | 18 ++++++++++++++++++ tools/testing/kunit/qemu_configs/mips64.py | 19 +++++++++++++++++++ tools/testing/kunit/qemu_configs/mips64el.py | 19 +++++++++++++++++++ tools/testing/kunit/qemu_configs/mipsel.py | 18 ++++++++++++++++++ 5 files changed, 76 insertions(+) --- base-commit: 6e24361511062dba8c5f7e59d51b29cdfa859523 change-id: 20241014-kunit-mips-e4fe1c265ed7 Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

2 weeks, 6 days

1
2
0 0

[PATCH 0/2] printf: convert self-test to KUnit

by Tamir Duberstein

This is one of just 3 remaining "Test Module" kselftests (the others being bitmap and scanf), the rest having been converted to KUnit. I tested this using: $ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 printf I have also sent out a series converting scanf[0]. Link: https://lore.kernel.org/all/20250204-scanf-kunit-convert-v3-0-386d7c3ee714@… [0] Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Tamir Duberstein (2): printf: convert self-test to KUnit printf: break kunit into test cases Documentation/core-api/printk-formats.rst | 2 +- MAINTAINERS | 2 +- arch/m68k/configs/amiga_defconfig | 1 - arch/m68k/configs/apollo_defconfig | 1 - arch/m68k/configs/atari_defconfig | 1 - arch/m68k/configs/bvme6000_defconfig | 1 - arch/m68k/configs/hp300_defconfig | 1 - arch/m68k/configs/mac_defconfig | 1 - arch/m68k/configs/multi_defconfig | 1 - arch/m68k/configs/mvme147_defconfig | 1 - arch/m68k/configs/mvme16x_defconfig | 1 - arch/m68k/configs/q40_defconfig | 1 - arch/m68k/configs/sun3_defconfig | 1 - arch/m68k/configs/sun3x_defconfig | 1 - arch/powerpc/configs/ppc64_defconfig | 1 - lib/Kconfig.debug | 20 +- lib/Makefile | 2 +- lib/printf_kunit.c | 757 ++++++++++++++++++++++++++ lib/test_printf.c | 863 ------------------------------ tools/testing/selftests/lib/config | 1 - tools/testing/selftests/lib/printf.sh | 4 - 21 files changed, 777 insertions(+), 887 deletions(-) --- base-commit: a86bf2283d2c9769205407e2b54777c03d012939 change-id: 20250131-printf-kunit-convert-fd4012aa2ec6 Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

2 weeks, 6 days

4
14
0 0

[PATCH] selftests: timers: Improve clarity in time difference message

by Rohit Yadav

Signed-off-by: Rohit Yadav <rohityadavconnect(a)gmail.com> --- tools/testing/selftests/timers/posix_timers.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/timers/posix_timers.c b/tools/testing/selftests/timers/posix_timers.c index 9814b3a1c77d..f6e3730c63b5 100644 --- a/tools/testing/selftests/timers/posix_timers.c +++ b/tools/testing/selftests/timers/posix_timers.c @@ -88,7 +88,7 @@ static int check_diff(struct timeval start, struct timeval end) diff += (end.tv_sec - start.tv_sec) * USEC_PER_SEC; if (llabs(diff - DELAY * USEC_PER_SEC) > USEC_PER_SEC / 2) { - printf("Diff too high: %lld..", diff); + printf("Time difference too high: %lld\n", diff); return -1; } -- 2.43.0

2 weeks, 6 days

1
0
0 0

[PATCH v2 1/2] selftests/bpf: Define SYS_PREFIX for powerpc

by Saket Kumar Bhaskar

Since commit 7e92e01b7245 ("powerpc: Provide syscall wrapper") landed in v6.1, syscall wrapper is enabled on powerpc. Commit 94746890202c ("powerpc: Don't add __powerpc_ prefix to syscall entry points") , that drops the prefix to syscall entry points, also landed in the same release. So, add the missing empty SYS_PREFIX prefix definition for powerpc, to fix some fentry and kprobe selftests. Signed-off-by: Saket Kumar Bhaskar <skb99(a)linux.ibm.com> --- tools/testing/selftests/bpf/progs/bpf_misc.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/bpf/progs/bpf_misc.h b/tools/testing/selftests/bpf/progs/bpf_misc.h index f45f4352f..02c9f7964 100644 --- a/tools/testing/selftests/bpf/progs/bpf_misc.h +++ b/tools/testing/selftests/bpf/progs/bpf_misc.h @@ -172,6 +172,9 @@ #elif defined(__TARGET_ARCH_riscv) #define SYSCALL_WRAPPER 1 #define SYS_PREFIX "__riscv_" +#elif defined(__TARGET_ARCH_powerpc) +#define SYSCALL_WRAPPER 1 +#define SYS_PREFIX "" #else #define SYSCALL_WRAPPER 0 #define SYS_PREFIX "__se_" -- 2.43.5

2 weeks, 6 days

3
4
0 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

Linux-kselftest-mirror February 2025