linux-kernel - Re: [PATCH V4] arm64/cpuinfo: Define HWCAP name arrays per their actual bit definitions

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Date:   Fri, 11 Sep 2020 16:31:49 +0100
From:   Will Deacon <will@...nel.org>
To:     linux-arm-kernel@...ts.infradead.org, catalin.marinas@....com,
        Anshuman Khandual <anshuman.khandual@....com>
Cc:     kernel-team@...roid.com, Will Deacon <will@...nel.org>,
        Dave Martin <Dave.Martin@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mark Brown <broonie@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-kernel@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>
Subject: Re: [PATCH V4] arm64/cpuinfo: Define HWCAP name arrays per their actual bit definitions

On Wed, 9 Sep 2020 11:18:55 +0530, Anshuman Khandual wrote:
> HWCAP name arrays (hwcap_str, compat_hwcap_str, compat_hwcap2_str) that are
> scanned for /proc/cpuinfo are detached from their bit definitions making it
> vulnerable and difficult to correlate. It is also bit problematic because
> during /proc/cpuinfo dump these arrays get traversed sequentially assuming
> they reflect and match actual HWCAP bit sequence, to test various features
> for a given CPU. This redefines name arrays per their HWCAP bit definitions
> . It also warns after detecting any feature which is not expected on arm64.

Applied to arm64 (for-next/cpuinfo), thanks!

[1/1] arm64/cpuinfo: Define HWCAP name arrays per their actual bit definitions
      https://git.kernel.org/arm64/c/4e56de82d4ec

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev