diff options
Diffstat (limited to 'tools/perf/tests/wp.c')
| -rw-r--r-- | tools/perf/tests/wp.c | 138 |
1 files changed, 53 insertions, 85 deletions
diff --git a/tools/perf/tests/wp.c b/tools/perf/tests/wp.c index d262d6639829..6c178985e37f 100644 --- a/tools/perf/tests/wp.c +++ b/tools/perf/tests/wp.c @@ -2,7 +2,9 @@ #include <stdlib.h> #include <string.h> #include <unistd.h> +#include <errno.h> #include <sys/ioctl.h> +#include <linux/compiler.h> #include <linux/hw_breakpoint.h> #include <linux/kernel.h> #include "tests.h" @@ -18,9 +20,15 @@ do { \ TEST_ASSERT_VAL(text, count == val); \ } while (0) +#ifdef __i386__ +/* Only breakpoint length less-than 8 has hardware support on i386. */ +volatile u32 data1; +#else volatile u64 data1; +#endif volatile u8 data2[3]; +#ifndef __s390x__ static int wp_read(int fd, long long *count, int size) { int ret = read(fd, count, size); @@ -56,20 +64,27 @@ static int __event(int wp_type, void *wp_addr, unsigned long wp_len) get__perf_event_attr(&attr, wp_type, wp_addr, wp_len); fd = sys_perf_event_open(&attr, 0, -1, -1, perf_event_open_cloexec_flag()); - if (fd < 0) + if (fd < 0) { + fd = -errno; pr_debug("failed opening event %x\n", attr.bp_type); + } return fd; } +#endif -static int wp_ro_test(void) +static int test__wp_ro(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) { +#if defined(__s390x__) || defined(__x86_64__) || defined(__i386__) + return TEST_SKIP; +#else int fd; unsigned long tmp, tmp1 = rand(); fd = __event(HW_BREAKPOINT_R, (void *)&data1, sizeof(data1)); if (fd < 0) - return -1; + return fd == -ENODEV ? TEST_SKIP : -1; tmp = data1; WP_TEST_ASSERT_VAL(fd, "RO watchpoint", 1); @@ -79,16 +94,21 @@ static int wp_ro_test(void) close(fd); return 0; +#endif } -static int wp_wo_test(void) +static int test__wp_wo(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) { +#if defined(__s390x__) + return TEST_SKIP; +#else int fd; unsigned long tmp, tmp1 = rand(); fd = __event(HW_BREAKPOINT_W, (void *)&data1, sizeof(data1)); if (fd < 0) - return -1; + return fd == -ENODEV ? TEST_SKIP : -1; tmp = data1; WP_TEST_ASSERT_VAL(fd, "WO watchpoint", 0); @@ -98,17 +118,22 @@ static int wp_wo_test(void) close(fd); return 0; +#endif } -static int wp_rw_test(void) +static int test__wp_rw(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) { +#if defined(__s390x__) + return TEST_SKIP; +#else int fd; unsigned long tmp, tmp1 = rand(); fd = __event(HW_BREAKPOINT_R | HW_BREAKPOINT_W, (void *)&data1, sizeof(data1)); if (fd < 0) - return -1; + return fd == -ENODEV ? TEST_SKIP : -1; tmp = data1; WP_TEST_ASSERT_VAL(fd, "RW watchpoint", 1); @@ -118,17 +143,21 @@ static int wp_rw_test(void) close(fd); return 0; +#endif } -static int wp_modify_test(void) +static int test__wp_modify(struct test_suite *test __maybe_unused, int subtest __maybe_unused) { +#if defined(__s390x__) + return TEST_SKIP; +#else int fd, ret; unsigned long tmp = rand(); struct perf_event_attr new_attr; fd = __event(HW_BREAKPOINT_W, (void *)&data1, sizeof(data1)); if (fd < 0) - return -1; + return fd == -ENODEV ? TEST_SKIP : -1; data1 = tmp; WP_TEST_ASSERT_VAL(fd, "Modify watchpoint", 1); @@ -139,6 +168,11 @@ static int wp_modify_test(void) new_attr.disabled = 1; ret = ioctl(fd, PERF_EVENT_IOC_MODIFY_ATTRIBUTES, &new_attr); if (ret < 0) { + if (errno == ENOTTY) { + test->test_cases[subtest].skip_reason = "missing kernel support"; + ret = TEST_SKIP; + } + pr_debug("ioctl(PERF_EVENT_IOC_MODIFY_ATTRIBUTES) failed\n"); close(fd); return ret; @@ -163,84 +197,18 @@ static int wp_modify_test(void) close(fd); return 0; -} - -static bool wp_ro_supported(void) -{ -#if defined (__x86_64__) || defined (__i386__) - return false; -#else - return true; -#endif -} - -static void wp_ro_skip_msg(void) -{ -#if defined (__x86_64__) || defined (__i386__) - pr_debug("Hardware does not support read only watchpoints.\n"); #endif } -static struct { - const char *desc; - int (*target_func)(void); - bool (*is_supported)(void); - void (*skip_msg)(void); -} wp_testcase_table[] = { - { - .desc = "Read Only Watchpoint", - .target_func = &wp_ro_test, - .is_supported = &wp_ro_supported, - .skip_msg = &wp_ro_skip_msg, - }, - { - .desc = "Write Only Watchpoint", - .target_func = &wp_wo_test, - }, - { - .desc = "Read / Write Watchpoint", - .target_func = &wp_rw_test, - }, - { - .desc = "Modify Watchpoint", - .target_func = &wp_modify_test, - }, +static struct test_case wp_tests[] = { + TEST_CASE_REASON("Read Only Watchpoint", wp_ro, "missing hardware support"), + TEST_CASE_REASON("Write Only Watchpoint", wp_wo, "missing hardware support"), + TEST_CASE_REASON("Read / Write Watchpoint", wp_rw, "missing hardware support"), + TEST_CASE_REASON("Modify Watchpoint", wp_modify, "missing hardware support"), + { .name = NULL, } }; -int test__wp_subtest_get_nr(void) -{ - return (int)ARRAY_SIZE(wp_testcase_table); -} - -const char *test__wp_subtest_get_desc(int i) -{ - if (i < 0 || i >= (int)ARRAY_SIZE(wp_testcase_table)) - return NULL; - return wp_testcase_table[i].desc; -} - -int test__wp(struct test *test __maybe_unused, int i) -{ - if (i < 0 || i >= (int)ARRAY_SIZE(wp_testcase_table)) - return TEST_FAIL; - - if (wp_testcase_table[i].is_supported && - !wp_testcase_table[i].is_supported()) { - wp_testcase_table[i].skip_msg(); - return TEST_SKIP; - } - - return !wp_testcase_table[i].target_func() ? TEST_OK : TEST_FAIL; -} - -/* The s390 so far does not have support for - * instruction breakpoint using the perf_event_open() system call. - */ -bool test__wp_is_supported(void) -{ -#if defined(__s390x__) - return false; -#else - return true; -#endif -} +struct test_suite suite__wp = { + .desc = "Watchpoint", + .test_cases = wp_tests, +}; |