linux-kernel - Re: [PATCH v6 00/76] x86: SEV-ES Guest Support

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Message-ID: <20200825062423.GS3354@suse.de>
Date:   Tue, 25 Aug 2020 08:24:23 +0200
From:   Joerg Roedel <jroedel@...e.de>
To:     Mike Stunes <mstunes@...are.com>
Cc:     Joerg Roedel <joro@...tes.org>, "x86@...nel.org" <x86@...nel.org>,
        "hpa@...or.com" <hpa@...or.com>, Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Jiri Slaby <jslaby@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Juergen Gross <jgross@...e.com>,
        Kees Cook <keescook@...omium.org>,
        David Rientjes <rientjes@...gle.com>,
        Cfir Cohen <cfir@...gle.com>,
        Erdem Aktas <erdemaktas@...gle.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Martin Radev <martin.b.radev@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH v6 00/76] x86: SEV-ES Guest Support

Hi Mike,

On Tue, Aug 25, 2020 at 12:21:03AM +0000, Mike Stunes wrote:
> Thanks for the new update! I still see the same FSGSBASE behavior on our platform.
> 
> That is, APs come up offline; masking out either FSGSBASE or RDPID from the
> guest's CPUID results in all CPUs online.
> 
> Is that still expected with this patch set? (As you mentioned in an earlier reply,
> I’m testing on a Rome system.)

The RDPID fix (removing RDPID usage from paranoid_entry) is probably not
yet merged into the base you have been using. But removing RDPID from
CPUID should make things work until the fix is merged.

Regards,

	Joerg