linux-kernel - Re: [RFC PATCH v2 10/23] KVM: TDX: Enable huge page splitting under write kvm->mmu

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Message-ID: <aRrqUXlHfCoPHqsg@yzhao56-desk.sh.intel.com>
Date: Mon, 17 Nov 2025 17:26:41 +0800
From: Yan Zhao <yan.y.zhao@...el.com>
To: Binbin Wu <binbin.wu@...ux.intel.com>
CC: "Huang, Kai" <kai.huang@...el.com>, "pbonzini@...hat.com"
	<pbonzini@...hat.com>, "seanjc@...gle.com" <seanjc@...gle.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>, "Li, Xiaoyao"
	<xiaoyao.li@...el.com>, "Du, Fan" <fan.du@...el.com>, "Hansen, Dave"
	<dave.hansen@...el.com>, "david@...hat.com" <david@...hat.com>,
	"thomas.lendacky@....com" <thomas.lendacky@....com>, "vbabka@...e.cz"
	<vbabka@...e.cz>, "tabba@...gle.com" <tabba@...gle.com>, "kas@...nel.org"
	<kas@...nel.org>, "michael.roth@....com" <michael.roth@....com>, "Weiny, Ira"
	<ira.weiny@...el.com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "ackerleytng@...gle.com"
	<ackerleytng@...gle.com>, "Yamahata, Isaku" <isaku.yamahata@...el.com>,
	"Peng, Chao P" <chao.p.peng@...el.com>, "Annapurve, Vishal"
	<vannapurve@...gle.com>, "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>,
	"Miao, Jun" <jun.miao@...el.com>, "x86@...nel.org" <x86@...nel.org>,
	"pgonda@...gle.com" <pgonda@...gle.com>
Subject: Re: [RFC PATCH v2 10/23] KVM: TDX: Enable huge page splitting under
 write kvm->mmu_lock

On Mon, Nov 17, 2025 at 05:17:27PM +0800, Binbin Wu wrote:
> 
> 
> On 11/13/2025 1:53 PM, Yan Zhao wrote:
> > On Tue, Nov 11, 2025 at 06:20:40PM +0800, Huang, Kai wrote:
> > > On Thu, 2025-08-07 at 17:43 +0800, Yan Zhao wrote:
> > > > Implement the split_external_spt hook to enable huge page splitting for
> 
> Nit:
> split_external_spt(), similar as Kai mentioned in patch 9.
Ok. I'll refer it to kvm_x86_ops.split_external_spt().