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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id s7sm5884278ejd.88.2021.07.06.05.33.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 06 Jul 2021 05:33:45 -0700 (PDT) Subject: Re: [RFC PATCH v2 03/69] KVM: X86: move out the definition vmcs_hdr/vmcs from kvm to x86 To: isaku.yamahata@intel.com, Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , erdemaktas@google.com, Connor Kuehl , Sean Christopherson , x86@kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: isaku.yamahata@gmail.com References: <62b61eb968f867518aedd98a0753b7fd29958efb.1625186503.git.isaku.yamahata@intel.com> From: Paolo Bonzini Message-ID: Date: Tue, 6 Jul 2021 14:33:43 +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: <62b61eb968f867518aedd98a0753b7fd29958efb.1625186503.git.isaku.yamahata@intel.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 03/07/21 00:04, isaku.yamahata@intel.com wrote: > From: Isaku Yamahata > > This is preparation for TDX support. > > Because SEAMCALL instruction requires VMX enabled, it needs to initialize > struct vmcs and load it before SEAMCALL instruction.[1] [2] Move out the > definition of vmcs into a common x86 header, arch/x86/include/asm/vmx.h, so > that seamloader code can share the same definition. > > [1] Intel Trust Domain CPU Architectural Extensions > https://software.intel.com/content/dam/develop/external/us/en/documents/intel-tdx-cpu-architectural-specification.pdf > > [2] TDX Module spec > https://software.intel.com/content/dam/develop/external/us/en/documents/tdx-module-1eas-v0.85.039.pdf > > Signed-off-by: Isaku Yamahata > --- > arch/x86/include/asm/vmx.h | 11 +++++++++++ > arch/x86/kvm/vmx/vmcs.h | 11 ----------- > 2 files changed, 11 insertions(+), 11 deletions(-) > > diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h > index 0ffaa3156a4e..035dfdafa2c1 100644 > --- a/arch/x86/include/asm/vmx.h > +++ b/arch/x86/include/asm/vmx.h > @@ -17,6 +17,17 @@ > #include > #include > > +struct vmcs_hdr { > + u32 revision_id:31; > + u32 shadow_vmcs:1; > +}; > + > +struct vmcs { > + struct vmcs_hdr hdr; > + u32 abort; > + char data[]; > +}; > + > #define VMCS_CONTROL_BIT(x) BIT(VMX_FEATURE_##x & 0x1f) > > /* > diff --git a/arch/x86/kvm/vmx/vmcs.h b/arch/x86/kvm/vmx/vmcs.h > index 1472c6c376f7..ac09bc4996a5 100644 > --- a/arch/x86/kvm/vmx/vmcs.h > +++ b/arch/x86/kvm/vmx/vmcs.h > @@ -11,17 +11,6 @@ > > #include "capabilities.h" > > -struct vmcs_hdr { > - u32 revision_id:31; > - u32 shadow_vmcs:1; > -}; > - > -struct vmcs { > - struct vmcs_hdr hdr; > - u32 abort; > - char data[]; > -}; > - > DECLARE_PER_CPU(struct vmcs *, current_vmcs); > > /* > Reviewed-by: Paolo Bonzini