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Subject[PATCH v9 10/13] selftests/resctrl: Add vendor detection mechanism
Date
From: Babu Moger <babu.moger@amd.com>

RESCTRL feature is supported both on Intel and AMD now. Some features
are implemented differently. Add vendor detection mechanism. Use the vendor
check where there are differences.

Signed-off-by: Babu Moger <babu.moger@amd.com>
Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
---
tools/testing/selftests/resctrl/resctrl.h | 1 +
.../testing/selftests/resctrl/resctrl_tests.c | 24 +++++++++++++++++++
2 files changed, 25 insertions(+)

diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 99659639e580..cd2ea1d2cad9 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -66,6 +66,7 @@ pid_t bm_pid, ppid;
int tests_run;

char llc_occup_path[1024];
+bool is_amd;

bool check_resctrlfs_support(void);
int filter_dmesg(void);
diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
index 7f75b0b01bb5..884e918b1e97 100644
--- a/tools/testing/selftests/resctrl/resctrl_tests.c
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -13,6 +13,27 @@
#define BENCHMARK_ARGS 64
#define BENCHMARK_ARG_SIZE 64

+bool is_amd;
+
+void detect_amd(void)
+{
+ FILE *inf = fopen("/proc/cpuinfo", "r");
+ char *res;
+
+ if (!inf)
+ return;
+
+ res = fgrep(inf, "vendor_id");
+
+ if (res) {
+ char *s = strchr(res, ':');
+
+ is_amd = s && !strcmp(s, ": AuthenticAMD\n");
+ free(res);
+ }
+ fclose(inf);
+}
+
static void cmd_help(void)
{
printf("usage: resctrl_tests [-h] [-b \"benchmark_cmd [options]\"] [-t test list] [-n no_of_bits]\n");
@@ -107,6 +128,9 @@ int main(int argc, char **argv)
if (geteuid() != 0)
printf("# WARNING: not running as root, tests may fail.\n");

+ /* Detect AMD vendor */
+ detect_amd();
+
if (has_ben) {
/* Extract benchmark command from command line. */
for (i = ben_ind; i < argc; i++) {
--
2.19.1
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