The CAT non-contiguous selftests have to read the file responsible for reporting support of non-contiguous CBMs in Intel CAT. Then the test compares if that information matches what is reported by CPUID output.
Add a generic helper function to read a chosen functionality support information.
Signed-off-by: Maciej Wieczor-Retman maciej.wieczor-retman@intel.com --- Changelog v2: - Added this patch.
tools/testing/selftests/resctrl/resctrl.h | 1 + tools/testing/selftests/resctrl/resctrlfs.c | 25 +++++++++++++++++++++ 2 files changed, 26 insertions(+)
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h index 739e16d08a7b..8f72d94b9cbe 100644 --- a/tools/testing/selftests/resctrl/resctrl.h +++ b/tools/testing/selftests/resctrl/resctrl.h @@ -161,6 +161,7 @@ unsigned int count_contiguous_bits(unsigned long val, unsigned int *start); int get_full_cbm(const char *cache_type, unsigned long *mask); int get_mask_no_shareable(const char *cache_type, unsigned long *mask); int get_cache_size(int cpu_no, const char *cache_type, unsigned long *cache_size); +int read_info_res_file(const char *resource, const char *filename); void ctrlc_handler(int signum, siginfo_t *info, void *ptr); int signal_handler_register(void); void signal_handler_unregister(void); diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c index 0e97036a64b8..70333440ff2f 100644 --- a/tools/testing/selftests/resctrl/resctrlfs.c +++ b/tools/testing/selftests/resctrl/resctrlfs.c @@ -249,6 +249,31 @@ static int get_bit_mask(const char *filename, unsigned long *mask) return 0; }
+int read_info_res_file(const char *resource, const char *filename) +{ + char file_path[PATH_MAX]; + FILE *fp; + int ret; + + snprintf(file_path, sizeof(file_path), "%s/%s/%s", INFO_PATH, resource, + filename); + + fp = fopen(file_path, "r"); + if (!fp) { + perror("Error in opening sparse_masks file\n"); + return -1; + } + + if (fscanf(fp, "%u", &ret) <= 0) { + perror("Could not get sparse_masks contents\n"); + fclose(fp); + return -1; + } + + fclose(fp); + return ret; +} + /* * create_bit_mask- Create bit mask from start, len pair * @start: LSB of the mask