[PATCH v5 5/5] selftests/resctrl: Enable MBM and MBA tests on AMD

[Swapnil Sapkal <swapnil.sapkal@amd.com>]

From: Babu Moger <babu.moger@amd.com>

Now that the UMC (Unified Memory Controller) perf events can be used to
validate the resctrl memory bandwidth numbers on AMD, extend the
vendor_specific gate of the MBM and MBA tests to also cover AMD so that
they run on AMD in addition to Intel.

The tests stay restricted to Intel and AMD: enumerate_mcs()
only knows about the iMC and UMC counters, so keeping the gate (rather
than making the tests universal) leaves other vendors skipped instead of
failing.

Assisted-by: Claude:claude-opus-4.8
Signed-off-by: Babu Moger <babu.moger@amd.com>
Co-developed-by: Swapnil Sapkal <swapnil.sapkal@amd.com>
Signed-off-by: Swapnil Sapkal <swapnil.sapkal@amd.com>
---

    v4->v5:
    - Rebased onto kselftest/next; updated the changelog reference from
      num_of_mem_controllers() to enumerate_mcs().

    v3->v4:
    - Rebased onto v7.2-rc7.
    - Extend the vendor_specific gate to ARCH_INTEL | ARCH_AMD instead of
      removing it, so unsupported vendors are skipped rather than reported
      as a failure.

 tools/testing/selftests/resctrl/mba_test.c | 2 +-
 tools/testing/selftests/resctrl/mbm_test.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
index 947735e26099..95250cfa5cd8 100644
--- a/tools/testing/selftests/resctrl/mba_test.c
+++ b/tools/testing/selftests/resctrl/mba_test.c
@@ -272,7 +272,7 @@ static bool mba_feature_check(const struct resctrl_test *test)
 struct resctrl_test mba_test = {
 	.name = "MBA",
 	.resource = "MB",
-	.vendor_specific = ARCH_INTEL,
+	.vendor_specific = ARCH_INTEL | ARCH_AMD,
 	.feature_check = mba_feature_check,
 	.run_test = mba_run_test,
 	.cleanup = mba_test_cleanup,
diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c
index e24c6237a22f..b2c5fd0ab8e3 100644
--- a/tools/testing/selftests/resctrl/mbm_test.c
+++ b/tools/testing/selftests/resctrl/mbm_test.c
@@ -178,7 +178,7 @@ static bool mbm_feature_check(const struct resctrl_test *test)
 struct resctrl_test mbm_test = {
 	.name = "MBM",
 	.resource = "MB",
-	.vendor_specific = ARCH_INTEL,
+	.vendor_specific = ARCH_INTEL | ARCH_AMD,
 	.feature_check = mbm_feature_check,
 	.run_test = mbm_run_test,
 	.cleanup = mbm_test_cleanup,
-- 
2.43.0