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23 Jan 2024 08:33:51 -0800 Message-ID: <54d4fe7f-2e36-4bb3-8b51-4a68510010d5@intel.com> Date: Tue, 23 Jan 2024 08:33:51 -0800 Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/3] crypto: padlock-sha: Matches CPU with Family with 6 explicitly Content-Language: en-US To: Tony W Wang-oc , 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> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 1/22/24 18:28, Tony W Wang-oc wrote: > Updates the supporting qualification for packlock-sha driver, making > it support CPUs whose vendor ID is Centaur and Famliy is 6. This changelog isn't telling us very much. *Why* is this a good change? > diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c > index 6865c7f1fc1a..2e82c5e77f7a 100644 > --- a/drivers/crypto/padlock-sha.c > +++ b/drivers/crypto/padlock-sha.c > @@ -491,7 +491,7 @@ static struct shash_alg sha256_alg_nano = { > }; > > 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? The one Intel use of X86_MATCH_VENDOR_FAM_FEATURE() also looks a bit suspect, btw.