linux-kernel - Re: [PATCH v7 032/102] KVM: x86/mmu: introduce config for PRIVATE KVM MMU

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Message-ID: <873d12c1ebe3a64e3f11133308df064f2b581d8e.camel@intel.com>
Date:   Fri, 08 Jul 2022 13:53:48 +1200
From:   Kai Huang <kai.huang@...el.com>
To:     isaku.yamahata@...el.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     isaku.yamahata@...il.com, Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [PATCH v7 032/102] KVM: x86/mmu: introduce config for PRIVATE
 KVM MMU

On Mon, 2022-06-27 at 14:53 -0700, isaku.yamahata@...el.com wrote:
> From: Isaku Yamahata <isaku.yamahata@...el.com>
> 
> To Keep the case of non TDX intact, introduce a new config option for
> private KVM MMU support.  At the moment, this is synonym for
> CONFIG_INTEL_TDX_HOST && CONFIG_KVM_INTEL.  The new flag make it clear
> that the config is only for x86 KVM MMU.

What is the "new flag"?

> 
> Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
> ---
>  arch/x86/kvm/Kconfig | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
> index e3cbd7706136..5a59abc83179 100644
> --- a/arch/x86/kvm/Kconfig
> +++ b/arch/x86/kvm/Kconfig
> @@ -129,4 +129,8 @@ config KVM_XEN
>  config KVM_EXTERNAL_WRITE_TRACKING
>  	bool
>  
> +config KVM_MMU_PRIVATE
> +	def_bool y
> +	depends on INTEL_TDX_HOST && KVM_INTEL
> +
>  endif # VIRTUALIZATION