linux-kernel - Re: [PATCH v8 7/7] KVM: x86: virtualize cpuid faulting

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Date:   Tue, 1 Nov 2016 12:33:56 -0600 (MDT)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Paolo Bonzini <pbonzini@...hat.com>
cc:     Kyle Huey <me@...ehuey.com>,
        Robert O'Callahan <robert@...llahan.org>,
        Andy Lutomirski <luto@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Radim Krčmář <rkrcmar@...hat.com>,
        Jeff Dike <jdike@...toit.com>,
        Richard Weinberger <richard@....at>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Shuah Khan <shuah@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Borislav Petkov <bp@...e.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Len Brown <len.brown@...el.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Dmitry Safonov <dsafonov@...tuozzo.com>,
        linux-kernel@...r.kernel.org,
        user-mode-linux-devel@...ts.sourceforge.net,
        user-mode-linux-user@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        kvm@...r.kernel.org
Subject: Re: [PATCH v8 7/7] KVM: x86: virtualize cpuid faulting

On Tue, 1 Nov 2016, Paolo Bonzini wrote:

> 
> > +	vcpu->arch.cpuid_fault = false;
> 
> This should be conditional on "if (!init_event)".  Most MSRs are untouched
> on an INIT IPI.
> 
> Otherwise looks good.  The patch is independent of the rest, so I would
> prefer to take it through the KVM tree.
> 

It depends on the FEATURE_ENABLES MSR define, which is part of that series.

Thanks

	tglx