linux-kernel - Re: [RFC Part2 PATCH v3 07/26] KVM: SVM: Add SEV feature definitions to KVM

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Date:   Tue, 12 Sep 2017 22:08:13 +0200
From:   Borislav Petkov <bp@...e.de>
To:     Brijesh Singh <brijesh.singh@....com>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org, kvm@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Joerg Roedel <joro@...tes.org>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        \"Radim Krčmář\" <rkrcmar@...hat.com>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: Re: [RFC Part2 PATCH v3 07/26] KVM: SVM: Add SEV feature definitions
 to KVM

On Mon, Jul 24, 2017 at 03:02:44PM -0500, Brijesh Singh wrote:
> From: Tom Lendacky <thomas.lendacky@....com>
> 
> Define the SEV enable bit for the VMCB control structure. The hypervisor
> will use this bit to enable SEV in the guest.
> 
> Signed-off-by: Tom Lendacky <thomas.lendacky@....com>
> Signed-off-by: Brijesh Singh <brijesh.singh@....com>
> ---
>  arch/x86/include/asm/svm.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
> index a3d9e0b..0be01f9 100644
> --- a/arch/x86/include/asm/svm.h
> +++ b/arch/x86/include/asm/svm.h
> @@ -140,6 +140,7 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
>  #define SVM_VM_CR_SVM_DIS_MASK  0x0010ULL
>  
>  #define SVM_NESTED_CTL_NP_ENABLE	BIT(0)
> +#define SVM_NESTED_CTL_SEV_ENABLE	BIT(1)
>  
>  struct __attribute__ ((__packed__)) vmcb_seg {
>  	u16 selector;
> -- 

Reviewed-by: Borislav Petkov <bp@...e.de>

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--