linux-kernel - Re: [PATCH] x86/sev: Add AMD_SEV_ES_GUEST Kconfig for including SEV-ES support

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Date:   Mon, 18 Jan 2021 18:59:38 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     "H. Peter Anvin" <hpa@...or.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Tom Lendacky <thomas.lendacky@....com>,
        Brijesh Singh <brijesh.singh@....com>
Subject: Re: [PATCH] x86/sev: Add AMD_SEV_ES_GUEST Kconfig for including
 SEV-ES support

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