linux-kernel - Re: [PATCH 0/7] KVM: TDX SEPT SEAMCALL retry

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Message-ID: <603be51644f179d0f9ece1cd35e8a744ffe21b6f.camel@intel.com>
Date: Tue, 14 Jan 2025 22:27:59 +0000
From: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To: "kvm@...r.kernel.org" <kvm@...r.kernel.org>, "pbonzini@...hat.com"
	<pbonzini@...hat.com>, "seanjc@...gle.com" <seanjc@...gle.com>, "Zhao, Yan Y"
	<yan.y.zhao@...el.com>
CC: "Huang, Kai" <kai.huang@...el.com>, "binbin.wu@...ux.intel.com"
	<binbin.wu@...ux.intel.com>, "Li, Xiaoyao" <xiaoyao.li@...el.com>, "Lindgren,
 Tony" <tony.lindgren@...el.com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "Chatre, Reinette"
	<reinette.chatre@...el.com>, "dmatlack@...gle.com" <dmatlack@...gle.com>,
	"Hunter, Adrian" <adrian.hunter@...el.com>, "Yamahata, Isaku"
	<isaku.yamahata@...el.com>, "isaku.yamahata@...il.com"
	<isaku.yamahata@...il.com>
Subject: Re: [PATCH 0/7] KVM: TDX SEPT SEAMCALL retry

We should probably...

On Mon, 2025-01-13 at 10:09 +0800, Yan Zhao wrote:
>   KVM: TDX: Return -EBUSY when tdh_mem_page_add() encounters
>     TDX_OPERAND_BUSY

Squash this in "KVM: TDX: Add an ioctl to create initial guest
memory" in kvm-coco-queue.

>   KVM: x86/mmu: Return RET_PF* instead of 1 in kvm_mmu_page_fault()

Recommend this to go through kvm/x86 tree separately?

>   KVM: TDX: Retry locally in TDX EPT violation handler on RET_PF_RETRY
>   KVM: TDX: Kick off vCPUs when SEAMCALL is busy during TD page removal

Include these in kvm-coco-queue and drop "x86/virt/tdx: Retry seamcall when
TDX_OPERAND_BUSY with operand SEPT"

>   fixup! KVM: TDX: Implement hooks to propagate changes of TDP MMU
>     mirror page table
>   fixup! KVM: TDX: Implement hooks to propagate changes of TDP MMU
>     mirror page table

Squash these into kvm-coco-queue.

>   fixup! KVM: TDX: Implement TDX vcpu enter/exit path

Add this in the next version of "TDX vcpu enter/exit path".

How does that sound?