linux-kernel - Re: [PATCH v12 00/24] Enable CET Virtualization

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Message-ID: <175564447877.3064634.10238926163407823114.b4-ty@google.com>
Date: Tue, 19 Aug 2025 16:11:55 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Chao Gao <chao.gao@...el.com>
Cc: mlevitsk@...hat.com, rick.p.edgecombe@...el.com, weijiang.yang@...el.com, 
	xin@...or.com, Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, 
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>, Paolo Bonzini <pbonzini@...hat.com>, 
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org
Subject: Re: [PATCH v12 00/24] Enable CET Virtualization

On Mon, 11 Aug 2025 19:55:08 -0700, Chao Gao wrote:
> The FPU support for CET virtualization has already been merged into 6.17-rc1.
> Building on that, this series introduces Intel CET virtualization support for
> KVM.
> 
> Changes in v12:
> 1. collect Tested-by tags from John and Mathias.
> 2. use less verbose names for KVM rdmsr/wrmsr emulation APIs in patch 1/2
>    (Sean/Xin)
> 3. refer to s_cet, ssp, and ssp_table in a consistent order in patch 22
>    (Xin)
> 
> [...]

Applied patches 1-5 to kvm-x86 misc.  I still plan/hope to land CET support
this cycle, but I wanted to land the MSR refactorings in particular in case
other in-flight code is adding users.

[01/24] KVM: x86: Rename kvm_{g,s}et_msr()* to show that they emulate guest accesses
        https://github.com/kvm-x86/linux/commit/d2dcf25a4cf2
[02/24] KVM: x86: Use double-underscore read/write MSR helpers as appropriate
        https://github.com/kvm-x86/linux/commit/db07f3d0eb19
[03/24] KVM: x86: Add kvm_msr_{read,write}() helpers
        https://github.com/kvm-x86/linux/commit/c2aa58b226ab
[04/24] KVM: x86: Manually clear MPX state only on INIT
        https://github.com/kvm-x86/linux/commit/41f6710f99f4
[05/24] KVM: x86: Zero XSTATE components on INIT by iterating over supported features
        https://github.com/kvm-x86/linux/commit/c26675447faf

--
https://github.com/kvm-x86/linux/tree/next