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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id u17sm853904edt.67.2021.07.08.01.53.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 08 Jul 2021 01:53:32 -0700 (PDT) Subject: Re: [PATCH Part1 RFC v4 04/36] x86/mm: Add sev_feature_enabled() helper To: "Dr. David Alan Gilbert" , Brijesh Singh Cc: x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-efi@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-coco@lists.linux.dev, linux-mm@kvack.org, linux-crypto@vger.kernel.org, Thomas Gleixner , Ingo Molnar , Joerg Roedel , Tom Lendacky , "H. Peter Anvin" , Ard Biesheuvel , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Andy Lutomirski , Dave Hansen , Sergio Lopez , Peter Gonda , Peter Zijlstra , Srinivas Pandruvada , David Rientjes , Dov Murik , Tobin Feldman-Fitzthum , Borislav Petkov , Michael Roth , Vlastimil Babka , tony.luck@intel.com, npmccallum@redhat.com, brijesh.ksingh@gmail.com References: <20210707181506.30489-1-brijesh.singh@amd.com> <20210707181506.30489-5-brijesh.singh@amd.com> From: Paolo Bonzini Message-ID: Date: Thu, 8 Jul 2021 10:53:29 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/07/21 10:50, Dr. David Alan Gilbert wrote: >> +enum sev_feature_type { >> + SEV, >> + SEV_ES, >> + SEV_SNP >> +}; > Is this .... > >> diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h >> index a7c413432b33..37589da0282e 100644 >> --- a/arch/x86/include/asm/msr-index.h >> +++ b/arch/x86/include/asm/msr-index.h >> @@ -481,8 +481,10 @@ >> #define MSR_AMD64_SEV 0xc0010131 >> #define MSR_AMD64_SEV_ENABLED_BIT 0 >> #define MSR_AMD64_SEV_ES_ENABLED_BIT 1 >> +#define MSR_AMD64_SEV_SNP_ENABLED_BIT 2 > Just the same as this ? > No, it's just a coincidence. Paolo