linux-kernel - Re: [PATCH 6/6] KVM: VMX: Move VERW closer to VMentry for MDS mitigation

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Message-ID: <20231023185643.oyd4irw43ztdqtps@treble>
Date:   Mon, 23 Oct 2023 11:56:43 -0700
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>, tony.luck@...el.com,
        ak@...ux.intel.com, tim.c.chen@...ux.intel.com,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        kvm@...r.kernel.org,
        Alyssa Milburn <alyssa.milburn@...ux.intel.com>,
        Daniel Sneddon <daniel.sneddon@...ux.intel.com>,
        antonio.gomez.iglesias@...ux.intel.com
Subject: Re: [PATCH  6/6] KVM: VMX: Move VERW closer to VMentry for MDS
 mitigation

On Fri, Oct 20, 2023 at 01:45:29PM -0700, Pawan Gupta wrote:
> @@ -31,6 +32,8 @@
>  #define VCPU_R15	__VCPU_REGS_R15 * WORD_SIZE
>  #endif
>  
> +#define GUEST_CLEAR_CPU_BUFFERS		USER_CLEAR_CPU_BUFFERS

I don't think the extra macro buys anything here.

-- 
Josh