linux-kernel - Re: [PATCH v1 1/3] x86/cpufeatures: Add low performance CRC32C instruction CPU feature

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Message-ID: <de54159e-0d0e-5e9e-db6c-5e908c86389f@zhaoxin.com>
Date:   Fri, 15 Jan 2021 09:43:14 +0800
From:   Tony W Wang-oc <TonyWWang-oc@...oxin.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     <herbert@...dor.apana.org.au>, <davem@...emloft.net>,
        <tglx@...utronix.de>, <mingo@...hat.com>, <x86@...nel.org>,
        <hpa@...or.com>, <tony.luck@...el.com>, <dave.hansen@...el.com>,
        <seanjc@...gle.com>, <fenghua.yu@...el.com>,
        <thomas.lendacky@....com>, <kyung.min.park@...el.com>,
        <kim.phillips@....com>, <mgross@...ux.intel.com>,
        <peterz@...radead.org>, <krish.sadhukhan@...cle.com>,
        <liam.merwick@...cle.com>, <mlevitsk@...hat.com>,
        <reinette.chatre@...el.com>, <babu.moger@....com>,
        <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <TimGuo-oc@...oxin.com>, <CooperYan@...oxin.com>,
        <QiyuanWang@...oxin.com>, <HerryYang@...oxin.com>,
        <CobeChen@...oxin.com>, <SilviaZhao@...oxin.com>
Subject: Re: [PATCH v1 1/3] x86/cpufeatures: Add low performance CRC32C
 instruction CPU feature

On 11/01/2021 19:03, Borislav Petkov wrote:
> On Mon, Jan 11, 2021 at 06:51:59PM +0800, Tony W Wang-oc wrote:
>> This issue will be enhanced by hardware and patch submit will be pending.
> 
> I have no clue what that has to do with your current patch... you might
> need to explain more verbosely.
> 

After internal research, decided to fix the low performance crc32c
instruction issue on these Zhaoxin CPUs by microcode. So, do not need
this patch anymore.

Sincerely
Tonyw