linux-kernel - Re: [PATCH] selftests/resctrl: Fix noncont_cat_run

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Message-ID: <475f7146-85ab-4992-5307-5dd4ab0184ee@linux.intel.com>
Date: Fri, 7 Jun 2024 13:21:54 +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] selftests/resctrl: Fix noncont_cat_run_test for AMD

On Wed, 5 Jun 2024, Babu Moger wrote:

> The selftest noncont_cat_run_test fails on AMD with the warnings. Reason
> is, AMD supports non contiguous CBM masks but does not report it via CPUID.
> 
> Update noncont_cat_run_test to check for the vendor when verifying CPUID.
> 
> Fixes: ae638551ab64 ("selftests/resctrl: Add non-contiguous CBMs CAT test")
> Signed-off-by: Babu Moger <babu.moger@....com>
> ---
> This was part of the series
> https://lore.kernel.org/lkml/cover.1708637563.git.babu.moger@amd.com/
> Sending this as a separate fix per review comments.
> ---
>  tools/testing/selftests/resctrl/cat_test.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c
> index d4dffc934bc3..b2988888786e 100644
> --- a/tools/testing/selftests/resctrl/cat_test.c
> +++ b/tools/testing/selftests/resctrl/cat_test.c
> @@ -308,7 +308,7 @@ 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)) {
>  		ksft_print_msg("CPUID output doesn't match 'sparse_masks' file content!\n");
>  		return 1;
>  	}
> 

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>


-- 
 i.