The patch below does not apply to the 6.5-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.5.y git checkout FETCH_HEAD git cherry-pick -x 06035f019422ba17e85c11e70d6d8bdbe9fa1afd # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2023112348-tradition-grandma-cb3c@gregkh' --subject-prefix 'PATCH 6.5.y' HEAD^..

Possible dependencies:

06035f019422 ("selftests/resctrl: Fix feature checks") d56e5da0e0f5 ("selftests/resctrl: Refactor feature check to use resource and feature name") caddc0fbe495 ("selftests/resctrl: Move resctrl FS mount/umount to higher level")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 06035f019422ba17e85c11e70d6d8bdbe9fa1afd Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= ilpo.jarvinen@linux.intel.com Date: Mon, 2 Oct 2023 12:48:12 +0300 Subject: [PATCH] selftests/resctrl: Fix feature checks MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

The MBA and CMT tests expect support of other features to be able to run.

When platform only supports MBA but not MBM, MBA test will fail with: Failed to open total bw file: No such file or directory

When platform only supports CMT but not CAT, CMT test will fail with: Failed to open bit mask file '/sys/fs/resctrl/info/L3/cbm_mask': No such file or directory

It leads to the test reporting test fail (even if no test was run at all).

Extend feature checks to cover these two conditions to show these tests were skipped rather than failed.

Fixes: ee0415681eb6 ("selftests/resctrl: Use resctrl/info for feature detection") Signed-off-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Tested-by: Shaopeng Tan tan.shaopeng@jp.fujitsu.com Reviewed-by: Reinette Chatre reinette.chatre@intel.com Reviewed-by: Shaopeng Tan tan.shaopeng@jp.fujitsu.com Cc: stable@vger.kernel.org # selftests/resctrl: Refactor feature check to use resource and feature name Signed-off-by: Shuah Khan skhan@linuxfoundation.org

diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c index a19dcc3f8fb0..2bbe3045a018 100644 --- a/tools/testing/selftests/resctrl/resctrl_tests.c +++ b/tools/testing/selftests/resctrl/resctrl_tests.c @@ -130,7 +130,9 @@ static void run_mba_test(const char * const *benchmark_cmd, int cpu_no) return; }

- if (!validate_resctrl_feature_request("MB", NULL) || (get_vendor() != ARCH_INTEL)) { + if (!validate_resctrl_feature_request("MB", NULL) || + !validate_resctrl_feature_request("L3_MON", "mbm_local_bytes") || + (get_vendor() != ARCH_INTEL)) { ksft_test_result_skip("Hardware does not support MBA or MBA is disabled\n"); goto cleanup; } @@ -153,7 +155,8 @@ static void run_cmt_test(const char * const *benchmark_cmd, int cpu_no) return; }

- if (!validate_resctrl_feature_request("L3_MON", "llc_occupancy")) { + if (!validate_resctrl_feature_request("L3_MON", "llc_occupancy") || + !validate_resctrl_feature_request("L3", NULL)) { ksft_test_result_skip("Hardware does not support CMT or CMT is disabled\n"); goto cleanup; }