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

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Message-ID: <5b9c454946a5fb6782c1245001439620f04932b3.camel@intel.com>
Date: Tue, 9 Dec 2025 23:54:00 +0000
From: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To: "sagis@...gle.com" <sagis@...gle.com>, "Zhao, Yan Y"
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Subject: Re: [RFC PATCH v2 10/23] KVM: TDX: Enable huge page splitting under
 write kvm->mmu_lock

On Tue, 2025-12-09 at 17:49 -0600, Sagi Shahar wrote:
> I was trying to test this code locally (without the DPAMT patches and
> with DPAMT disabled) and saw that sometimes tdh_mem_page_demote
> returns TDX_INTERRUPTED_RESTARTABLE. Looking at the TDX module code
> (version 1.5.16 from [1]) I see that demote and promote are the only
> seamcalls that return TDX_INTERRUPTED_RESTARTABLE so it wasn't handled
> by KVM until now.

Did you see "Open 3" in the coverletter?