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Date:   Mon, 23 Oct 2023 14:17:25 -0700
From:   Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
To:     Josh Poimboeuf <jpoimboe@kernel.org>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org,
        "H. Peter Anvin" <hpa@zytor.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Andy Lutomirski <luto@kernel.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Sean Christopherson <seanjc@google.com>,
        Paolo Bonzini <pbonzini@redhat.com>, tony.luck@intel.com,
        ak@linux.intel.com, tim.c.chen@linux.intel.com,
        linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
        kvm@vger.kernel.org,
        Alyssa Milburn <alyssa.milburn@linux.intel.com>,
        Daniel Sneddon <daniel.sneddon@linux.intel.com>,
        antonio.gomez.iglesias@linux.intel.com
Subject: Re: [PATCH  6/6] KVM: VMX: Move VERW closer to VMentry for MDS
 mitigation
Message-ID: <20231023211647.lgebgvt622zemg6y@desk>
References: <20231020-delay-verw-v1-0-cff54096326d@linux.intel.com>
 <20231020-delay-verw-v1-6-cff54096326d@linux.intel.com>
 <20231023185643.oyd4irw43ztdqtps@treble>
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On Mon, Oct 23, 2023 at 11:56:43AM -0700, Josh Poimboeuf wrote:
> 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.

Using USER_CLEAR_CPU_BUFFERS in the VMentry path didn't feel right. But,
after "USER_" is gone as per your comment on 2/6 patch,
GUEST_CLEAR_CPU_BUFFERS can also go away.