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

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Date: Fri, 26 Apr 2024 09:56:31 -0500
From: "Moger, Babu" <bmoger@....com>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 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

Hi Ilpo,

On 4/26/2024 2:06 AM, Ilpo Järvinen wrote:
> 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.

Sure. Will do.

Thanks

Babu