linux-kernel - Re: [RFC PATCH 05/12] KVM: TDX: Drop superfluous page pinning in S-EPT management

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Message-ID: <7f01e35bab5334782e392b4ea3ecf0349a452797.camel@intel.com>
Date: Thu, 28 Aug 2025 02:45:18 +0000
From: "Huang, Kai" <kai.huang@...el.com>
To: "pbonzini@...hat.com" <pbonzini@...hat.com>, "seanjc@...gle.com"
	<seanjc@...gle.com>
CC: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>, "kvm@...r.kernel.org"
	<kvm@...r.kernel.org>, "Annapurve, Vishal" <vannapurve@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Zhao, Yan Y"
	<yan.y.zhao@...el.com>, "michael.roth@....com" <michael.roth@....com>,
	"Weiny, Ira" <ira.weiny@...el.com>
Subject: Re: [RFC PATCH 05/12] KVM: TDX: Drop superfluous page pinning in
 S-EPT management

On Tue, 2025-08-26 at 17:05 -0700, Sean Christopherson wrote:
> Don't explicitly pin pages when mapping pages into the S-EPT, guest_memfd
> doesn't support page migration in any capacity, i.e. there are no migrate
> callbacks because guest_memfd pages *can't* be migrated.  See the WARN in
> kvm_gmem_migrate_folio().
> 
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> 

Reviewed-by: Kai Huang <kai.huang@...el.com>