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Message-ID: <85dd3df3-9c0e-45e2-af8d-50dbc0cf40c8@intel.com>
Date: Wed, 31 Jan 2024 07:33:36 -0800
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Subject: Re: [PATCH v2 1/3] crypto: padlock-sha: Matches CPU with Family with
 6 explicitly
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To: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>, herbert@gondor.apana.org.au,
 davem@davemloft.net, linux-crypto@vger.kernel.org,
 linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com,
 bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
 seanjc@google.com, kim.phillips@amd.com, kirill.shutemov@linux.intel.com,
 jmattson@google.com, babu.moger@amd.com, kai.huang@intel.com,
 acme@redhat.com, aik@amd.com, namhyung@kernel.org
Cc: CobeChen@zhaoxin.com, TimGuo@zhaoxin.com, LeoLiu-oc@zhaoxin.com,
 GeorgeXue@zhaoxin.com
References: <20240123022852.2475-1-TonyWWang-oc@zhaoxin.com>
 <20240123022852.2475-2-TonyWWang-oc@zhaoxin.com>
 <54d4fe7f-2e36-4bb3-8b51-4a68510010d5@intel.com>
 <40e74749-fa9d-4089-ae23-e9aefdd3549f@zhaoxin.com>
From: Dave Hansen <dave.hansen@intel.com>
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In-Reply-To: <40e74749-fa9d-4089-ae23-e9aefdd3549f@zhaoxin.com>
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On 1/31/24 01:45, Tony W Wang-oc wrote:
>>>   static const struct x86_cpu_id padlock_sha_ids[] = {
>>> -     X86_MATCH_FEATURE(X86_FEATURE_PHE, NULL),
>>> +     X86_MATCH_VENDOR_FAM_FEATURE(CENTAUR, 6, X86_FEATURE_PHE, NULL),
>>>        {}
>>>   };
>> Logically, this is saying that there are non-CENTAUR or non-family-6
>> CPUs that set X86_FEATURE_PHE, but don't support X86_FEATURE_PHE.  Is
>> that the case?
> 
> Not exactly.
> 
> Zhaoxin CPU supports X86_FEATURE_PHE and X86_FEATURE_PHE2.
> 
> We expect the Zhaoxin CPU to use the zhaoxin_sha driver introduced in
> the third patch of this patch set.
> 
> Without this patch Zhaoxin CPU will also match the padlock-sha driver too.

I honestly have no idea what this is saying.

Could you try again, please?