linux-kernel - Re: [PATCH v19 067/130] KVM: TDX: Add load_mmu

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Message-ID: <20240403173344.GF2444378@ls.amr.corp.intel.com>
Date: Wed, 3 Apr 2024 10:33:44 -0700
From: Isaku Yamahata <isaku.yamahata@...el.com>
To: Binbin Wu <binbin.wu@...ux.intel.com>
Cc: isaku.yamahata@...el.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, isaku.yamahata@...il.com,
	Paolo Bonzini <pbonzini@...hat.com>, erdemaktas@...gle.com,
	Sean Christopherson <seanjc@...gle.com>,
	Sagi Shahar <sagis@...gle.com>, Kai Huang <kai.huang@...el.com>,
	chen.bo@...el.com, hang.yuan@...el.com, tina.zhang@...el.com,
	Sean Christopherson <sean.j.christopherson@...el.com>,
	isaku.yamahata@...ux.intel.com
Subject: Re: [PATCH v19 067/130] KVM: TDX: Add load_mmu_pgd method for TDX

On Mon, Apr 01, 2024 at 11:49:43PM +0800,
Binbin Wu <binbin.wu@...ux.intel.com> wrote:

> 
> 
> On 2/26/2024 4:26 PM, isaku.yamahata@...el.com wrote:
> > From: Sean Christopherson <sean.j.christopherson@...el.com>
> > 
> > For virtual IO, the guest TD shares guest pages with VMM without
> > encryption.
> 
> Virtual IO is a use case of shared memory, it's better to use it
> as a example instead of putting it at the beginning of the sentence.
> 
> 
> >   Shared EPT is used to map guest pages in unprotected way.
> > 
> > Add the VMCS field encoding for the shared EPTP, which will be used by
> > TDX to have separate EPT walks for private GPAs (existing EPTP) versus
> > shared GPAs (new shared EPTP).
> > 
> > Set shared EPT pointer value for the TDX guest to initialize TDX MMU.
> May have a mention that the EPTP for priavet GPAs is set by TDX module.

Sure, let me update the commit message.
-- 
Isaku Yamahata <isaku.yamahata@...el.com>