linux-kernel - Re: [PATCH v2] selftests: x86: skip the tests if prerequisites aren't fulfilled

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Date: Wed, 27 Mar 2024 10:18:36 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: "Chang S. Bae" <chang.seok.bae@...el.com>,
 Muhammad Usama Anjum <usama.anjum@...labora.com>,
 Shuah Khan <shuah@...nel.org>,
 "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
 Dave Hansen <dave.hansen@...ux.intel.com>,
 Binbin Wu <binbin.wu@...ux.intel.com>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>,
 Weihong Zhang <weihong.zhang@...el.com>, angquan yu <angquan21@...il.com>
Cc: kernel@...labora.com, linux-kselftest@...r.kernel.org,
 linux-kernel@...r.kernel.org, Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v2] selftests: x86: skip the tests if prerequisites aren't
 fulfilled

On 3/26/24 15:20, Chang S. Bae wrote:
> On 3/26/2024 1:51 PM, Shuah Khan wrote:
>>
>> show that there are bo backwards compatibility issues
> In older kernels lacking AMX support [1], arch_prctl() returns EINVAL. With AMX support, the kernel will properly set 'features'.
> 
> It is also worth noting that this simplification was previously acknowledged [2], albeit some time ago.
> 
> Thanks,
> Chang
> 
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=db8268df0983adc2bb1fb48c9e5f7bfbb5f617f3
> [2] https://lore.kernel.org/lkml/de61ffdb-638a-ca84-31b5-55f6a8616597@linuxfoundation.org/
> 
> 

Thanks. This can be included in the change log so it is
clear.

thanks,
-- Shuah