linux-kernel - Re: [PATCH v4 13/16] KVM: TDX: Handle PAMT allocation in fault path

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Message-ID: <54f8e13966729b9e10a573b112e254474c31bdf8.camel@intel.com>
Date: Wed, 26 Nov 2025 22:33:47 +0000
From: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To: "binbin.wu@...ux.intel.com" <binbin.wu@...ux.intel.com>
CC: "kvm@...r.kernel.org" <kvm@...r.kernel.org>, "linux-coco@...ts.linux.dev"
	<linux-coco@...ts.linux.dev>, "Huang, Kai" <kai.huang@...el.com>, "Li,
 Xiaoyao" <xiaoyao.li@...el.com>, "Hansen, Dave" <dave.hansen@...el.com>,
	"Zhao, Yan Y" <yan.y.zhao@...el.com>, "Wu, Binbin" <binbin.wu@...el.com>,
	"kas@...nel.org" <kas@...nel.org>, "seanjc@...gle.com" <seanjc@...gle.com>,
	"mingo@...hat.com" <mingo@...hat.com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "pbonzini@...hat.com" <pbonzini@...hat.com>,
	"Yamahata, Isaku" <isaku.yamahata@...el.com>, "tglx@...utronix.de"
	<tglx@...utronix.de>, "Annapurve, Vishal" <vannapurve@...gle.com>, "Gao,
 Chao" <chao.gao@...el.com>, "bp@...en8.de" <bp@...en8.de>, "x86@...nel.org"
	<x86@...nel.org>
Subject: Re: [PATCH v4 13/16] KVM: TDX: Handle PAMT allocation in fault path

On Wed, 2025-11-26 at 13:56 +0800, Binbin Wu wrote:
> > --- a/arch/x86/kvm/vmx/tdx.c
> > +++ b/arch/x86/kvm/vmx/tdx.c
> > @@ -683,6 +683,8 @@ int tdx_vcpu_create(struct kvm_vcpu *vcpu)
> >    	if (!irqchip_split(vcpu->kvm))
> >    		return -EINVAL;
> >    
> > +	INIT_LIST_HEAD(&tdx->prealloc.page_list);
> > +
> 
> Should this change be moved to patch 12?
> Because the pre-alloc page list has started to be used in patch 12 for
> external
> page tables even without enabling dynamic PAMT.

Oh, yes. thanks.