linux-kernel - Re: [PATCH v2 4/4] selftests/resctrl: Enable MBA/MBA tests on AMD

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Message-ID: <911547f7-e952-f771-867a-57c1de738c39@linux.intel.com>
Date: Fri, 26 Apr 2024 10:06:38 +0300 (EEST)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Babu Moger <babu.moger@....com>
cc: fenghua.yu@...el.com, Reinette Chatre <reinette.chatre@...el.com>, 
    shuah@...nel.org, LKML <linux-kernel@...r.kernel.org>, 
    linux-kselftest@...r.kernel.org, 
    Maciej Wieczór-Retman <maciej.wieczor-retman@...el.com>, 
    peternewman@...gle.com, eranian@...gle.com
Subject: Re: [PATCH v2 4/4] selftests/resctrl: Enable MBA/MBA tests on AMD

On Thu, 25 Apr 2024, Babu Moger wrote:

> Enable MBA/MBM tests if UMC (Unified Memory Controller) support is
> available on the system. Tests will be skipped otherwise.
> 
> Update noncont_cat_run_test to check for vendor. AMD supports
> non contiguous CBM masks but does not report it via CPUID.
> 
> Signed-off-by: Babu Moger <babu.moger@....com>
> ---
>  tools/testing/selftests/resctrl/cat_test.c | 2 +-
>  tools/testing/selftests/resctrl/mba_test.c | 1 -
>  tools/testing/selftests/resctrl/mbm_test.c | 1 -
>  3 files changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c
> index 4cb991be8e31..b682eaf65bfd 100644
> --- a/tools/testing/selftests/resctrl/cat_test.c
> +++ b/tools/testing/selftests/resctrl/cat_test.c
> @@ -314,7 +314,7 @@ static int noncont_cat_run_test(const struct resctrl_test *test,
>  	else
>  		return -EINVAL;
>  
> -	if (sparse_masks != ((ecx >> 3) & 1)) {
> +	if ((get_vendor() == ARCH_INTEL) && sparse_masks != ((ecx >> 3) & 1)) {

This looks independent change to me which should be put into own patch.

-- 
 i.

>  		ksft_print_msg("CPUID output doesn't match 'sparse_masks' file content!\n");
>  		return 1;
>  	}
> diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
> index 7946e32e85c8..353054724fa7 100644
> --- a/tools/testing/selftests/resctrl/mba_test.c
> +++ b/tools/testing/selftests/resctrl/mba_test.c
> @@ -177,7 +177,6 @@ static bool mba_feature_check(const struct resctrl_test *test)
>  struct resctrl_test mba_test = {
>  	.name = "MBA",
>  	.resource = "MB",
> -	.vendor_specific = ARCH_INTEL,
>  	.feature_check = mba_feature_check,
>  	.run_test = mba_run_test,
>  };
> diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c
> index d67ffa3ec63a..f2223315b5b8 100644
> --- a/tools/testing/selftests/resctrl/mbm_test.c
> +++ b/tools/testing/selftests/resctrl/mbm_test.c
> @@ -147,7 +147,6 @@ static bool mbm_feature_check(const struct resctrl_test *test)
>  struct resctrl_test mbm_test = {
>  	.name = "MBM",
>  	.resource = "MB",
> -	.vendor_specific = ARCH_INTEL,
>  	.feature_check = mbm_feature_check,
>  	.run_test = mbm_run_test,
>  };
>