From: Gal Hammer <ghammer@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>, Gal Hammer <gal@redhat.com>
Cc: qemu-stable@nongnu.org, qemu-devel@nongnu.org,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [Qemu-devel] [PATCH] piix: do not reset APIC base address (0x80) on piix4_reset.
Date: Wed, 18 Dec 2013 17:16:29 +0200 [thread overview]
Message-ID: <52B1BC4D.4020901@redhat.com> (raw)
In-Reply-To: <52B1AEDF.8050109@redhat.com>
On 18/12/2013 16:19, Paolo Bonzini wrote:
> The PIIX spec says that during S3 the chipset provides "Shadow registers
> for standard AT write only registers to save and restore system state
> information" These are just for the 825x (DMA controller, PIC, PIT).
> We do not emulate them and our BIOS does not support them.
>
> I was told that a few memory controller registers survive S3, which in
> our case would be the i440FX's PAM registers, but I don't think this
> register should be one of them.
>
> What guest is breaking and how? Does the guest usually initialize this
> register, or does the firmware (SeaBIOS) do that? If the latter, this
> could be a SeaBIOS bug instead.
Both Windows and Linux guests are breaking when system is suspend. On
system wakeup nothing occurs and the OS is not restored.
I don't know the answer for the remaining questions.
Thanks,
Gal.
next prev parent reply other threads:[~2013-12-18 15:14 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-11 9:21 [Qemu-devel] [PATCH] piix: do not reset APIC base address (0x80) on piix4_reset Gal Hammer
2013-12-11 10:23 ` Paolo Bonzini
2013-12-11 10:44 ` Michael S. Tsirkin
2013-12-11 11:04 ` Gal Hammer
2013-12-18 14:19 ` Paolo Bonzini
2013-12-18 15:16 ` Gal Hammer [this message]
2013-12-18 21:57 ` Laszlo Ersek
2013-12-18 14:22 ` Paolo Bonzini
2013-12-18 15:22 ` Michael S. Tsirkin
2013-12-18 16:27 ` Marcel Apfelbaum
2013-12-18 16:33 ` Michael S. Tsirkin
2013-12-18 16:34 ` Paolo Bonzini
2013-12-18 16:55 ` Marcel Apfelbaum
2013-12-18 17:21 ` Michael S. Tsirkin
2013-12-19 16:06 ` Kevin O'Connor
2013-12-19 18:03 ` Marcel Apfelbaum
2013-12-19 18:17 ` Kevin O'Connor
2013-12-18 16:58 ` Michael S. Tsirkin
2013-12-18 22:10 ` Laszlo Ersek
2013-12-18 22:16 ` Laszlo Ersek
2013-12-18 23:43 ` Paolo Bonzini
2013-12-18 16:49 ` Marcel Apfelbaum
2013-12-18 17:20 ` Michael S. Tsirkin
2013-12-19 9:37 ` Marcel Apfelbaum
2013-12-19 9:49 ` Marcel Apfelbaum
2013-12-19 10:35 ` Michael S. Tsirkin
2013-12-18 15:59 ` Gal Hammer
2013-12-18 16:00 ` Paolo Bonzini
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