linux-kernel - Re: [PATCH kernel 3/3] x86/sev: Do not handle #VC for DR7 read/write

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Message-ID: <Y5Dke3WOpd8bJK9q@google.com>
Date:   Wed, 7 Dec 2022 19:07:39 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Alexey Kardashevskiy <aik@....com>, kvm@...r.kernel.org,
        x86@...nel.org, linux-kernel@...r.kernel.org,
        Venu Busireddy <venu.busireddy@...cle.com>,
        Tony Luck <tony.luck@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Michael Sterritt <sterritt@...gle.com>,
        Michael Roth <michael.roth@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH kernel 3/3] x86/sev: Do not handle #VC for DR7 read/write

On Wed, Dec 07, 2022, Borislav Petkov wrote:
> On Thu, Dec 01, 2022 at 05:38:33PM +0000, Sean Christopherson wrote:
> > Probably high time to add a helper/macro to convert the SEV_STATUS to
> > the SEV_FEATURES field.
> 
> Nah, there's a couple of
> 
> MSR_AMD64_SEV*
> 
> defines in arch/x86/include/asm/msr-index.h.
> 
> Bit 5 should simply be added there.

Ah, yeah, that's much better.