linux-kernel - Re: [PATCH v6 08/16] KVM: TDX: Pin pages via get

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Message-ID: <20231121100418.GF1109547@ls.amr.corp.intel.com>
Date:   Tue, 21 Nov 2023 02:04:18 -0800
From:   Isaku Yamahata <isaku.yamahata@...ux.intel.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>,
        David Matlack <dmatlack@...gle.com>,
        Kai Huang <kai.huang@...el.com>,
        Zhi Wang <zhi.wang.linux@...il.com>, chen.bo@...el.com,
        hang.yuan@...el.com, tina.zhang@...el.com,
        Xiaoyao Li <xiaoyao.li@...el.com>,
        isaku.yamahata@...ux.intel.com
Subject: Re: [PATCH v6 08/16] KVM: TDX: Pin pages via get_page() right before
 ADD/AUG'ed to TDs

On Mon, Nov 20, 2023 at 07:05:39PM +0800,
Binbin Wu <binbin.wu@...ux.intel.com> wrote:

> 
> 
> On 11/7/2023 11:00 PM, isaku.yamahata@...el.com wrote:
> > From: Xiaoyao Li <xiaoyao.li@...el.com>
> > 
> > When kvm_faultin_pfn(), it doesn't have the info regarding which page level
> > will the gfn be mapped at. Hence it doesn't know to pin a 4K page or a
> > 2M page.
> > 
> > Move the guest private pages pinning logic right before
> > TDH_MEM_PAGE_ADD/AUG() since at that time it knows the page level info.
> This patch looks strange, the code has nothing to do with the shortlog.
> It seems that the change of this patch has already been covered by 06/16.
> 
> Something went wrong when formatting the patch?

Oh, right. This patch doesn't make sense any more. I''ll drop this patch.
-- 
Isaku Yamahata <isaku.yamahata@...ux.intel.com>