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[0/3] selftests: Fix cpuid / vendor checking build issues

Message ID 20240813104515.19152-1-ilpo.jarvinen@linux.intel.com
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Series selftests: Fix cpuid / vendor checking build issues | expand

Message

Ilpo Järvinen Aug. 13, 2024, 10:45 a.m. UTC
First, generalize resctrl selftest non-contiguous CAT check to not
assume non-AMD vendor implies Intel. Second, improve kselftest common
parts and resctrl selftest such that the use of __cpuid_count() does
not lead into a build failure (happens at least on ARM).

The last patch might still require some work on which symbol the
conditional in kselftest.h is implemented. I could not find any
pre-existing one that could be used. Perhaps somebody who's more
familiar with the kselftest build system has a better suggestion on
which symbol the logic should be based at?

Ilpo Järvinen (3):
  selftests/resctrl: Generalize non-contiguous CAT check
  selftests/resctrl: Always initialize ecx to avoid build warnings
  [RFC] kselftest: Provide __cpuid_count() stub on non-x86 archs

 tools/testing/selftests/kselftest.h        |  6 +++++
 tools/testing/selftests/lib.mk             |  4 ++++
 tools/testing/selftests/resctrl/cat_test.c | 28 +++++++++++++---------
 3 files changed, 27 insertions(+), 11 deletions(-)

Comments

Shuah Khan Aug. 21, 2024, 6:30 a.m. UTC | #1
On 8/13/24 04:45, Ilpo Järvinen wrote:
> First, generalize resctrl selftest non-contiguous CAT check to not
> assume non-AMD vendor implies Intel. Second, improve kselftest common
> parts and resctrl selftest such that the use of __cpuid_count() does
> not lead into a build failure (happens at least on ARM).
> 
> The last patch might still require some work on which symbol the
> conditional in kselftest.h is implemented. I could not find any
> pre-existing one that could be used. Perhaps somebody who's more
> familiar with the kselftest build system has a better suggestion on
> which symbol the logic should be based at?
> 
> Ilpo Järvinen (3):
>    selftests/resctrl: Generalize non-contiguous CAT check
>    selftests/resctrl: Always initialize ecx to avoid build warnings
>    [RFC] kselftest: Provide __cpuid_count() stub on non-x86 archs
> 
>   tools/testing/selftests/kselftest.h        |  6 +++++
>   tools/testing/selftests/lib.mk             |  4 ++++
>   tools/testing/selftests/resctrl/cat_test.c | 28 +++++++++++++---------
>   3 files changed, 27 insertions(+), 11 deletions(-)
> 

These changes look good to me. Can you send the RFC patch without the RFC tag
for me to pull in? I don't apply RFC patches.

Usama, does this fix the problem you are seeing?

Hi Reinette - do these look okay to you? Can you give me an ack if they do?

thanks,
-- Shuah
Muhammad Usama Anjum Aug. 22, 2024, 4:51 a.m. UTC | #2
On 8/21/24 11:30 AM, Shuah Khan wrote:
> On 8/13/24 04:45, Ilpo Järvinen wrote:
>> First, generalize resctrl selftest non-contiguous CAT check to not
>> assume non-AMD vendor implies Intel. Second, improve kselftest common
>> parts and resctrl selftest such that the use of __cpuid_count() does
>> not lead into a build failure (happens at least on ARM).
>>
>> The last patch might still require some work on which symbol the
>> conditional in kselftest.h is implemented. I could not find any
>> pre-existing one that could be used. Perhaps somebody who's more
>> familiar with the kselftest build system has a better suggestion on
>> which symbol the logic should be based at?
>>
>> Ilpo Järvinen (3):
>>    selftests/resctrl: Generalize non-contiguous CAT check
>>    selftests/resctrl: Always initialize ecx to avoid build warnings
>>    [RFC] kselftest: Provide __cpuid_count() stub on non-x86 archs
>>
>>   tools/testing/selftests/kselftest.h        |  6 +++++
>>   tools/testing/selftests/lib.mk             |  4 ++++
>>   tools/testing/selftests/resctrl/cat_test.c | 28 +++++++++++++---------
>>   3 files changed, 27 insertions(+), 11 deletions(-)
>>
> 
> These changes look good to me. Can you send the RFC patch without the
> RFC tag
> for me to pull in? I don't apply RFC patches.
> 
> Usama, does this fix the problem you are seeing?
Yeah, build errors are resolved.

> 
> Hi Reinette - do these look okay to you? Can you give me an ack if they do?
> 
> thanks,
> -- Shuah
>
Ilpo Järvinen Aug. 22, 2024, 7:41 a.m. UTC | #3
On Thu, 22 Aug 2024, Muhammad Usama Anjum wrote:

> On 8/21/24 11:30 AM, Shuah Khan wrote:
> > On 8/13/24 04:45, Ilpo Järvinen wrote:
> >> First, generalize resctrl selftest non-contiguous CAT check to not
> >> assume non-AMD vendor implies Intel. Second, improve kselftest common
> >> parts and resctrl selftest such that the use of __cpuid_count() does
> >> not lead into a build failure (happens at least on ARM).
> >>
> >> The last patch might still require some work on which symbol the
> >> conditional in kselftest.h is implemented. I could not find any
> >> pre-existing one that could be used. Perhaps somebody who's more
> >> familiar with the kselftest build system has a better suggestion on
> >> which symbol the logic should be based at?
> >>
> >> Ilpo Järvinen (3):
> >>    selftests/resctrl: Generalize non-contiguous CAT check
> >>    selftests/resctrl: Always initialize ecx to avoid build warnings
> >>    [RFC] kselftest: Provide __cpuid_count() stub on non-x86 archs
> >>
> >>   tools/testing/selftests/kselftest.h        |  6 +++++
> >>   tools/testing/selftests/lib.mk             |  4 ++++
> >>   tools/testing/selftests/resctrl/cat_test.c | 28 +++++++++++++---------
> >>   3 files changed, 27 insertions(+), 11 deletions(-)
> >>
> > 
> > These changes look good to me. Can you send the RFC patch without the
> > RFC tag
> > for me to pull in? I don't apply RFC patches.
> > 
> > Usama, does this fix the problem you are seeing?
>
> Yeah, build errors are resolved.

Great, thanks for testing!

I'll send v2 with RFC removed soon.

> > Hi Reinette - do these look okay to you? Can you give me an ack if they do?
> > 
> > thanks,
> > -- Shuah
> > 
>