linux-kernel - Re: [PATCH] tools headers: Sync x86 cpufeatures and arm64 cputype headers

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Message-ID: <2797b8f2-fc56-41a6-8ab3-dd298fd3ea36@amd.com>
Date: Mon, 29 Sep 2025 14:47:24 +0530
From: "Garg, Shivank" <shivankg@....com>
To: Leo Yan <leo.yan@....com>, linux-perf-users@...r.kernel.org,
 James Clark <james.clark@...aro.org>
Cc: linux-kernel@...r.kernel.org, acme@...hat.com, namhyung@...nel.org,
 yangyicong@...ilicon.com, bp@...en8.de, mingo@...nel.org, xin@...or.com,
 yosry.ahmed@...ux.dev
Subject: Re: [PATCH] tools headers: Sync x86 cpufeatures and arm64 cputype
 headers



On 9/29/2025 1:57 PM, Leo Yan wrote:
> Hi Shivank,
> 
> [ + James, perf-user ML ]
> 
> On Mon, Sep 29, 2025 at 06:16:45AM +0000, Shivank Garg wrote:
>> To pick up the changes in this cset:
>>
>> commit 2f8f173413f1 ("x86/vmscape: Add conditional IBPB mitigation")
>> commit a508cec6e521 ("x86/vmscape: Enumerate VMSCAPE bug")
>> commit c8c2647e69be ("arm64: Make  _midr_in_range_list() an exported function")
>> commit e3121298c7fc ("arm64: Modify _midr_range() functions to read MIDR/REVIDR internally")
>>
>> This addresses these perf build warnings:
>> tools/perf$ ./check-headers.sh
>> Warning: Kernel ABI header differences:
>>   diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures
>>   diff -u tools/arch/arm64/include/asm/cputype.h arch/arm64/include/asm/cputype.h
> 
> Please drop arm64 related syncing, otherwise, it will break perf
> building.

Sure, I'll send V2 without arm64 sync.

Thanks,
Shivank
> 
> At the meantime, James is working on refactoring cpu type definitions
> for Arm64, we expect to avoid syncing cputype.h.
> 
> Thanks,
> Leo