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From: Laszlo Ersek <lersek@redhat.com>
Message-ID: <56E03152.9060003@redhat.com>
Date: Wed, 9 Mar 2016 15:21:06 +0100
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Subject: Re: [Qemu-devel] [PATCH 0/4] virt: provide secure-only RAM and
 first flash
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To: Paolo Bonzini <pbonzini@redhat.com>, Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Peter Maydell <peter.maydell@linaro.org>, qemu-arm <qemu-arm@nongnu.org>, QEMU Developers <qemu-devel@nongnu.org>, Markus Armbruster <armbru@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>

On 03/09/16 15:07, Paolo Bonzini wrote:
> 
> 
> On 09/03/2016 15:06, Laszlo Ersek wrote:
>> However: despite reusing the core SMM code identically in the guest,
>> there is at least one stark behavioral difference: in QEMU the SMI is
>> raised only on the processor that triggers it. This exercises paths in
>> the core SMM code where processors have to count down timeouts and bring
>> each other in, and these busy loops are very visible to an interactive
>> user in certain circumstances.
> 
> Right, and that's unfortunately something that's hard to change because
> SeaBIOS relies on it. :((

I recall (and am still thankful for) the relevant patch receiving the
due attention and investigation on the list, so I'm not bitter about it
or anything.

Just a bit worried about users asking about the animation :)

Laszlo