Re: [PATCH Part2 v5 00/45] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support

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Subject: Re: [PATCH Part2 v5 00/45] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support
From: Borislav Petkov <bp@xxxxxxxxx>
Date: Fri, 12 Nov 2021 21:04:58 +0100
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>, Peter Gonda <pgonda@xxxxxxxxxx>, Brijesh Singh <brijesh.singh@xxxxxxx>, x86@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-coco@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-crypto@xxxxxxxxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Joerg Roedel <jroedel@xxxxxxx>, Tom Lendacky <Thomas.Lendacky@xxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Ard Biesheuvel <ardb@xxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>, Wanpeng Li <wanpengli@xxxxxxxxxxx>, Jim Mattson <jmattson@xxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Sergio Lopez <slp@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>, David Rientjes <rientjes@xxxxxxxxxx>, Dov Murik <dovmurik@xxxxxxxxxxxxx>, Tobin Feldman-Fitzthum <tobin@xxxxxxx>, Michael Roth <michael.roth@xxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, "Kirill A . Shutemov" <kirill@xxxxxxxxxxxxx>, Andi Kleen <ak@xxxxxxxxxxxxxxx>, tony.luck@xxxxxxxxx, marcorr@xxxxxxxxxx, sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx
In-reply-to: <YY7FAW5ti7YMeejj@google.com>
References: <20210820155918.7518-1-brijesh.singh@amd.com> <CAMkAt6o0ySn1=iLYsH0LCnNARrUbfaS0cvtxB__y_d+Q6DUzfA@mail.gmail.com> <061ccd49-3b9f-d603-bafd-61a067c3f6fa@intel.com> <YY6z5/0uGJmlMuM6@zn.tnic> <YY7FAW5ti7YMeejj@google.com>

On Fri, Nov 12, 2021 at 07:48:17PM +0000, Sean Christopherson wrote:
> Yes, but IMO inducing a fault in the guest because of _host_ bug is wrong.

What do you suggest instead?

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

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  - From: Brijesh Singh
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