#define _GNU_SOURCE #include #include #include #include #include #include "../kselftest.h" enum test_membarrier_status { TEST_MEMBARRIER_PASS = 0, TEST_MEMBARRIER_FAIL, TEST_MEMBARRIER_SKIP, }; static int sys_membarrier(int cmd, int flags) { return syscall(__NR_membarrier, cmd, flags); } static enum test_membarrier_status test_membarrier_cmd_fail(void) { int cmd = -1, flags = 0; if (sys_membarrier(cmd, flags) != -1) { printf("membarrier: Wrong command should fail but passed.\n"); return TEST_MEMBARRIER_FAIL; } return TEST_MEMBARRIER_PASS; } static enum test_membarrier_status test_membarrier_flags_fail(void) { int cmd = MEMBARRIER_CMD_QUERY, flags = 1; if (sys_membarrier(cmd, flags) != -1) { printf("membarrier: Wrong flags should fail but passed.\n"); return TEST_MEMBARRIER_FAIL; } return TEST_MEMBARRIER_PASS; } static enum test_membarrier_status test_membarrier_success(void) { int cmd = MEMBARRIER_CMD_SHARED, flags = 0; if (sys_membarrier(cmd, flags) != 0) { printf("membarrier: Executing MEMBARRIER_CMD_SHARED failed. %s.\n", strerror(errno)); return TEST_MEMBARRIER_FAIL; } printf("membarrier: MEMBARRIER_CMD_SHARED success.\n"); return TEST_MEMBARRIER_PASS; } static enum test_membarrier_status test_membarrier(void) { enum test_membarrier_status status; status = test_membarrier_cmd_fail(); if (status) return status; status = test_membarrier_flags_fail(); if (status) return status; status = test_membarrier_success(); if (status) return status; return TEST_MEMBARRIER_PASS; } static enum test_membarrier_status test_membarrier_query(void) { int flags = 0, ret; printf("membarrier MEMBARRIER_CMD_QUERY "); ret = sys_membarrier(MEMBARRIER_CMD_QUERY, flags); if (ret < 0) { printf("failed. %s.\n", strerror(errno)); switch (errno) { case ENOSYS: /* * It is valid to build a kernel with * CONFIG_MEMBARRIER=n. However, this skips the tests. */ return TEST_MEMBARRIER_SKIP; case EINVAL: default: return TEST_MEMBARRIER_FAIL; } } if (!(ret & MEMBARRIER_CMD_SHARED)) { printf("command MEMBARRIER_CMD_SHARED is not supported.\n"); return TEST_MEMBARRIER_FAIL; } printf("syscall available.\n"); return TEST_MEMBARRIER_PASS; } int main(int argc, char **argv) { switch (test_membarrier_query()) { case TEST_MEMBARRIER_FAIL: return ksft_exit_fail(); case TEST_MEMBARRIER_SKIP: return ksft_exit_skip(); } switch (test_membarrier()) { case TEST_MEMBARRIER_FAIL: return ksft_exit_fail(); case TEST_MEMBARRIER_SKIP: return ksft_exit_skip(); } printf("membarrier: tests done!\n"); return ksft_exit_pass(); } t>

path: root/tools/perf/pmu-events/arch/x86/nehalemep/floating-point.json

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