diff options
Diffstat (limited to 'tools/testing/selftests/kvm/lib/test_util.c')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/test_util.c | 150 |
1 files changed, 129 insertions, 21 deletions
diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c index 6d23878bbfe1..8a1848586a85 100644 --- a/tools/testing/selftests/kvm/lib/test_util.c +++ b/tools/testing/selftests/kvm/lib/test_util.c @@ -4,7 +4,8 @@ * * Copyright (C) 2020, Google LLC. */ - +#include <stdio.h> +#include <stdarg.h> #include <assert.h> #include <ctype.h> #include <limits.h> @@ -17,6 +18,30 @@ #include "test_util.h" +sigjmp_buf expect_sigbus_jmpbuf; + +void __attribute__((used)) expect_sigbus_handler(int signum) +{ + siglongjmp(expect_sigbus_jmpbuf, 1); +} + +/* + * Random number generator that is usable from guest code. This is the + * Park-Miller LCG using standard constants. + */ + +struct guest_random_state new_guest_random_state(uint32_t seed) +{ + struct guest_random_state s = {.seed = seed}; + return s; +} + +uint32_t guest_random_u32(struct guest_random_state *state) +{ + state->seed = (uint64_t)state->seed * 48271 % ((uint32_t)(1 << 31) - 1); + return state->seed; +} + /* * Parses "[0-9]+[kmgt]?". */ @@ -114,60 +139,87 @@ void print_skip(const char *fmt, ...) puts(", skipping test"); } -bool thp_configured(void) +static bool test_sysfs_path(const char *path) { - int ret; struct stat statbuf; + int ret; - ret = stat("/sys/kernel/mm/transparent_hugepage", &statbuf); + ret = stat(path, &statbuf); TEST_ASSERT(ret == 0 || (ret == -1 && errno == ENOENT), - "Error in stating /sys/kernel/mm/transparent_hugepage"); + "Error in stat()ing '%s'", path); return ret == 0; } -size_t get_trans_hugepagesz(void) +bool thp_configured(void) +{ + return test_sysfs_path("/sys/kernel/mm/transparent_hugepage"); +} + +static size_t get_sysfs_val(const char *path) { size_t size; FILE *f; int ret; - TEST_ASSERT(thp_configured(), "THP is not configured in host kernel"); - - f = fopen("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size", "r"); - TEST_ASSERT(f != NULL, "Error in opening transparent_hugepage/hpage_pmd_size"); + f = fopen(path, "r"); + TEST_ASSERT(f, "Error opening '%s'", path); ret = fscanf(f, "%ld", &size); + TEST_ASSERT(ret > 0, "Error reading '%s'", path); + + /* Re-scan the input stream to verify the entire file was read. */ ret = fscanf(f, "%ld", &size); - TEST_ASSERT(ret < 1, "Error reading transparent_hugepage/hpage_pmd_size"); - fclose(f); + TEST_ASSERT(ret < 1, "Error reading '%s'", path); + fclose(f); return size; } +size_t get_trans_hugepagesz(void) +{ + TEST_ASSERT(thp_configured(), "THP is not configured in host kernel"); + + return get_sysfs_val("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size"); +} + +bool is_numa_balancing_enabled(void) +{ + if (!test_sysfs_path("/proc/sys/kernel/numa_balancing")) + return false; + return get_sysfs_val("/proc/sys/kernel/numa_balancing") == 1; +} + size_t get_def_hugetlb_pagesz(void) { char buf[64]; - const char *tag = "Hugepagesize:"; + const char *hugepagesize = "Hugepagesize:"; + const char *hugepages_total = "HugePages_Total:"; FILE *f; f = fopen("/proc/meminfo", "r"); TEST_ASSERT(f != NULL, "Error in opening /proc/meminfo"); while (fgets(buf, sizeof(buf), f) != NULL) { - if (strstr(buf, tag) == buf) { + if (strstr(buf, hugepages_total) == buf) { + unsigned long long total = strtoull(buf + strlen(hugepages_total), NULL, 10); + if (!total) { + fprintf(stderr, "HUGETLB is not enabled in /proc/sys/vm/nr_hugepages\n"); + exit(KSFT_SKIP); + } + } + if (strstr(buf, hugepagesize) == buf) { fclose(f); - return strtoull(buf + strlen(tag), NULL, 10) << 10; + return strtoull(buf + strlen(hugepagesize), NULL, 10) << 10; } } - if (feof(f)) - TEST_FAIL("HUGETLB is not configured in host kernel"); - else - TEST_FAIL("Error in reading /proc/meminfo"); + if (feof(f)) { + fprintf(stderr, "HUGETLB is not configured in host kernel"); + exit(KSFT_SKIP); + } - fclose(f); - return 0; + TEST_FAIL("Error in reading /proc/meminfo"); } #define ANON_FLAGS (MAP_PRIVATE | MAP_ANONYMOUS) @@ -334,3 +386,59 @@ long get_run_delay(void) return val[1]; } + +int atoi_paranoid(const char *num_str) +{ + char *end_ptr; + long num; + + errno = 0; + num = strtol(num_str, &end_ptr, 0); + TEST_ASSERT(!errno, "strtol(\"%s\") failed", num_str); + TEST_ASSERT(num_str != end_ptr, + "strtol(\"%s\") didn't find a valid integer.", num_str); + TEST_ASSERT(*end_ptr == '\0', + "strtol(\"%s\") failed to parse trailing characters \"%s\".", + num_str, end_ptr); + TEST_ASSERT(num >= INT_MIN && num <= INT_MAX, + "%ld not in range of [%d, %d]", num, INT_MIN, INT_MAX); + + return num; +} + +char *strdup_printf(const char *fmt, ...) +{ + va_list ap; + char *str; + + va_start(ap, fmt); + TEST_ASSERT(vasprintf(&str, fmt, ap) >= 0, "vasprintf() failed"); + va_end(ap); + + return str; +} + +#define CLOCKSOURCE_PATH "/sys/devices/system/clocksource/clocksource0/current_clocksource" + +char *sys_get_cur_clocksource(void) +{ + char *clk_name; + struct stat st; + FILE *fp; + + fp = fopen(CLOCKSOURCE_PATH, "r"); + TEST_ASSERT(fp, "failed to open clocksource file, errno: %d", errno); + + TEST_ASSERT(!fstat(fileno(fp), &st), "failed to stat clocksource file, errno: %d", + errno); + + clk_name = malloc(st.st_size); + TEST_ASSERT(clk_name, "failed to allocate buffer to read file"); + + TEST_ASSERT(fgets(clk_name, st.st_size, fp), "failed to read clocksource file: %d", + ferror(fp)); + + fclose(fp); + + return clk_name; +} |