From: Laszlo Ersek <lersek@redhat.com>
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>
Subject: Re: [Qemu-devel] [PATCH 0/4] virt: provide secure-only RAM and first flash
Date: Wed, 9 Mar 2016 15:21:06 +0100 [thread overview]
Message-ID: <56E03152.9060003@redhat.com> (raw)
In-Reply-To: <56E02E1C.2090207@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
next prev parent reply other threads:[~2016-03-09 14:21 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-12 14:45 [Qemu-devel] [PATCH 0/4] virt: provide secure-only RAM and first flash Peter Maydell
2016-02-12 14:45 ` [Qemu-devel] [PATCH 1/4] hw/arm/virt: Provide a secure-only RAM if booting in Secure mode Peter Maydell
2016-02-12 14:45 ` [Qemu-devel] [PATCH 2/4] loader: Add load_image_mr() to load ROM image to a MemoryRegion Peter Maydell
2016-03-03 16:46 ` Paolo Bonzini
2016-03-04 7:42 ` Michael S. Tsirkin
2016-02-12 14:46 ` [Qemu-devel] [PATCH 3/4] hw/arm/virt: Load bios image to MemoryRegion, not physaddr Peter Maydell
2016-02-12 14:46 ` [Qemu-devel] [PATCH 4/4] hw/arm/virt: Make first flash device Secure-only if booting secure Peter Maydell
2016-02-12 22:54 ` [Qemu-devel] [PATCH 0/4] virt: provide secure-only RAM and first flash Mark Cave-Ayland
2016-02-25 16:47 ` Peter Maydell
2016-03-07 15:20 ` Paolo Bonzini
2016-03-07 23:34 ` Peter Maydell
2016-03-08 12:02 ` Paolo Bonzini
2016-03-08 12:10 ` Ard Biesheuvel
2016-03-08 12:13 ` Ard Biesheuvel
2016-03-08 12:14 ` Paolo Bonzini
2016-03-08 12:16 ` Ard Biesheuvel
2016-03-08 12:41 ` Paolo Bonzini
2016-03-08 12:50 ` Ard Biesheuvel
2016-03-08 13:06 ` Paolo Bonzini
2016-03-08 13:46 ` Peter Maydell
2016-03-09 14:06 ` Laszlo Ersek
2016-03-09 14:07 ` Paolo Bonzini
2016-03-09 14:21 ` Laszlo Ersek [this message]
2016-03-08 13:49 ` Peter Maydell
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