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Message-ID: <1477953679.2230.7.camel@tiscali.nl>
Subject: Re: [PATCH 0/8] x86/fpu: Remove CR0.TS support
From: Paul Bolle <pebolle@tiscali.nl>
To: Andy Lutomirski <luto@kernel.org>, x86@kernel.org
Cc: Borislav Petkov <bp@alien8.de>, linux-kernel@vger.kernel.org,
        Rusty Russell <rusty@rustcorp.com.au>,
        Paolo Bonzini <pbonzini@redhat.com>, Rik van Riel <riel@redhat.com>,
        kvm list <kvm@vger.kernel.org>
Date: Mon, 31 Oct 2016 23:41:19 +0100
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On Mon, 2016-10-31 at 15:18 -0700, Andy Lutomirski wrote:
> I havne't meaningfully tested lguest because I can't get it to work
> even without these patches.

Have you disabled CONFIG_OLPC in the .config for the guest kernel?
Otherwise you will run into
    lguest: Reinjecting trap 13 for fault at 0x1000062: Invalid argument

A similar obscure gotcha (I think it is "unhandled trap 13") can be
avoided by launching the guest with the dis_ucode_ldr kernel option.

Hope this helps,


Paul Bolle