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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id he38sm9395037ejc.96.2021.01.18.09.59.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 18 Jan 2021 09:59:45 -0800 (PST) Subject: Re: [PATCH] x86/sev: Add AMD_SEV_ES_GUEST Kconfig for including SEV-ES support To: Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, Andy Lutomirski , Dave Hansen , Peter Zijlstra Cc: "H. Peter Anvin" , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Tom Lendacky , Brijesh Singh References: <20210116002517.548769-1-seanjc@google.com> From: Paolo Bonzini Message-ID: Date: Mon, 18 Jan 2021 18:59:38 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: <20210116002517.548769-1-seanjc@google.com> 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 16/01/21 01:25, Sean Christopherson wrote: > > @@ -1527,12 +1527,14 @@ config AMD_MEM_ENCRYPT > select DYNAMIC_PHYSICAL_MASK > select ARCH_USE_MEMREMAP_PROT > select ARCH_HAS_FORCE_DMA_UNENCRYPTED > - select INSTRUCTION_DECODER > help > Say yes to enable support for the encryption of system memory. > This requires an AMD processor that supports Secure Memory > Encryption (SME). > > + This also enables support for running as a Secure Encrypted > + Virtualization (SEV) guest. > + > config AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT > bool "Activate AMD Secure Memory Encryption (SME) by default" > default y > @@ -1547,6 +1549,15 @@ config AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT > If set to N, then the encryption of system memory can be > activated with the mem_encrypt=on command line option. > > +config AMD_SEV_ES_GUEST > + bool "AMD Secure Encrypted Virtualization - Encrypted State (SEV-ES) Guest support" > + depends on AMD_MEM_ENCRYPT > + select INSTRUCTION_DECODER > + help > + Enable support for running as a Secure Encrypted Virtualization - > + Encrypted State (SEV-ES) Guest. This enables SEV-ES boot protocol > + changes, #VC handling, SEV-ES specific hypercalls, etc... > + Queued, thanks. Paolo