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Message-ID: <646effc4-c67d-4248-8e69-4279a3d7ec28@linuxfoundation.org> 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
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