linux-kernel - Re: [RFC PATCH v2 01/69] KVM: TDX: introduce config for KVM TDX support

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Message-ID: <YO3TZWtkwHBMRpYy@google.com>
Date:   Tue, 13 Jul 2021 17:54:45 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     isaku.yamahata@...el.com
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, erdemaktas@...gle.com,
        Connor Kuehl <ckuehl@...hat.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        isaku.yamahata@...il.com
Subject: Re: [RFC PATCH v2 01/69] KVM: TDX: introduce config for KVM TDX
 support

On Fri, Jul 02, 2021, isaku.yamahata@...el.com wrote:
> From: Isaku Yamahata <isaku.yamahata@...el.com>
> 
> Add new config KVM_INTEL_TDX for KVM TDX support.  This patch introduce
> a config only.  Later patch will implement feature depends on it.
> 
> Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
> ---
>  arch/x86/kvm/Kconfig | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
> index f6b93a35ce14..66622901bf7d 100644
> --- a/arch/x86/kvm/Kconfig
> +++ b/arch/x86/kvm/Kconfig
> @@ -96,6 +96,17 @@ config X86_SGX_KVM
>  
>  	  If unsure, say N.
>  
> +config KVM_INTEL_TDX
> +	bool "Trusted Domain eXtensions(TDX) Host support"
> +	depends on KVM_INTEL && X86_64
> +	select FW_LOADER

Similar to patch 2, it's impossible to review this as is since the FW_LOADER
dependency is for the SEAMLDR side of things, which is not included in this
series.

> +
> +	help
> +	  Extends KVM on Intel processors to support Trusted Domain Extensions.
> +	  Intel Trust Domain eXtensions(TDX) is an architecture based on CPU
> +	  instructions and TDX module to deploy hardware-isolated virtual
> +	  machines(VMs) which is called Trust Domains(TDs).
> +
>  config KVM_AMD
>  	tristate "KVM for AMD processors support"
>  	depends on KVM
> -- 
> 2.25.1
>