linux-kernel - Re: [PATCH v2 0/6] Delay VERW

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Date:   Tue, 24 Oct 2023 10:01:33 -0700
From:   Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>
To:     Matthew Wilcox <willy@...radead.org>
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>,
        Josh Poimboeuf <jpoimboe@...nel.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,
        Alyssa Milburn <alyssa.milburn@...el.com>,
        Dave Hansen <dave.hansen@...el.com>
Subject: Re: [PATCH v2 0/6] Delay VERW

On Tue, Oct 24, 2023 at 01:26:00PM +0100, Matthew Wilcox wrote:
> On Tue, Oct 24, 2023 at 01:08:14AM -0700, Pawan Gupta wrote:
> > Legacy instruction VERW was overloaded by some processors to clear
> 
> Can you raise a bug against the SDM?  The VERR/VERW instruction is
> out-of-order alphabetically; my copy of Volume 2 from June 2023 has it
> placed between VEXPANDPS and VEXTRACTF128.

:)

Thanks for reporting, I have notified the relevant people. Hopefully,
this should be fixed in the next SDM release.