linux-kernel - Re: [PATCH v2] add cpu frequency to cpuinfo in arm64

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Message-ID: <c73a9fb20b42f2086a0fb9c068ecc272@kernel.org>
Date:   Wed, 26 Jan 2022 12:29:00 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     Robin Murphy <robin.murphy@....com>
Cc:     Chao Liu <liuchao173@...wei.com>, catalin.marinas@....com,
        will@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, hewenliang4@...wei.com,
        zhoukang7@...wei.com
Subject: Re: [PATCH v2] add cpu frequency to cpuinfo in arm64

On 2022-01-26 12:05, Robin Murphy wrote:
> On 2022-01-26 09:23, Chao Liu wrote:
>> There is cpu frequency in /proc/cpuinfo in x86 but not in arm64
> 
> arm64 cpuinfo also doesn't show the APIC ID or microcode version.
> Different architectures are different.
> 
> Besides, x86 cpuinfo only shows MHz if the CPU has X86_FEATURE_TSC, so
> for compatibility we should only do this on AArch64 CPUs which have
> X86_FEATURE_TSC.

/me prepares a patch to be sent in just over 2 months...

         M.
-- 
Jazz is not dead. It just smells funny...