linux-kernel - Re: [PATCH v4 5/8] x86/bugs: KVM: Move VM_CLEAR_CPU_BUFFERS into SVM as SVM_CLEAR_CPU

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Message-ID: <20251113150309.GCaRXzLS0X5lvy7Xlb@fat_crate.local>
Date: Thu, 13 Nov 2025 16:03:09 +0100
From: Borislav Petkov <bp@...en8.de>
To: Sean Christopherson <seanjc@...gle.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Josh Poimboeuf <jpoimboe@...nel.org>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
	Brendan Jackman <jackmanb@...gle.com>
Subject: Re: [PATCH v4 5/8] x86/bugs: KVM: Move VM_CLEAR_CPU_BUFFERS into SVM
 as SVM_CLEAR_CPU_BUFFERS

On Thu, Oct 30, 2025 at 05:30:37PM -0700, Sean Christopherson wrote:
> Now that VMX encodes its own sequency for clearing CPU buffers, move

Now that VMX encodes its own sequency for clearing CPU buffers, move
Unknown word [sequency] in commit message.
Suggestions: ['sequence',

Please introduce a spellchecker into your patch creation workflow. :)

> VM_CLEAR_CPU_BUFFERS into SVM to minimize the chances of KVM botching a
> mitigation in the future, e.g. using VM_CLEAR_CPU_BUFFERS instead of
> checking multiple mitigation flags.
> 
> No functional change intended.
> 
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> ---
>  arch/x86/include/asm/nospec-branch.h | 3 ---
>  arch/x86/kvm/svm/vmenter.S           | 6 ++++--

...

> +#define SVM_CLEAR_CPU_BUFFERS \

I need to remember to grep for "CLEAR_CPU_BUF" in the future in order to catch
them all...

Acked-by: Borislav Petkov (AMD) <bp@...en8.de>

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette