linux-kernel - Re: [PATCH v12 32/46] x86/compressed/64: Add support for SEV-SNP CPUID table in #VC handlers

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Message-ID: <23728EEA-37B8-478E-9576-DBFD6FE2A294@suse.de>
Date:   Thu, 17 Mar 2022 13:11:27 +0000
From:   Boris Petkov <bp@...e.de>
To:     Peter Gonda <pgonda@...gle.com>, Joerg Roedel <jroedel@...e.de>
CC:     Michael Roth <michael.roth@....com>,
        Brijesh Singh <brijesh.singh@....com>,
        the arch/x86 maintainers <x86@...nel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        kvm list <kvm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        platform-driver-x86@...r.kernel.org,
        Andy Lutomirski <luto@...nel.org>,
        Sergio Lopez <slp@...hat.com>, linux-efi@...r.kernel.org,
        linux-coco@...ts.linux.dev, Ingo Molnar <mingo@...hat.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tony Luck <tony.luck@...el.com>, linux-mm@...ck.org,
        Jim Mattson <jmattson@...gle.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        David Rientjes <rientjes@...gle.com>,
        Dov Murik <dovmurik@...ux.ibm.com>,
        Tobin Feldman-Fitzthum <tobin@....com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Borislav Petkov <bp@...en8.de>, brijesh.ksingh@...il.com,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Marc Orr <marcorr@...gle.com>,
        "Dr . David Alan Gilbert" <dgilbert@...hat.com>,
        Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
Subject: Re: [PATCH v12 32/46] x86/compressed/64: Add support for SEV-SNP CPUID table in #VC handlers

On March 14, 2022 5:34:42 PM UTC, Peter Gonda <pgonda@...gle.com> wrote:
>I was also thinking about adding a vcpu run exit reason for
>termination. It would be nice to get a more informative exit reason
>than -EINVAL in userspace. Thoughts?

Absolutely - it should be unambiguously clear why we're terminating. 

-- 
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