From: Gleb Natapov <gleb@redhat.com>
To: Kevin O'Connor <kevin@koconnor.net>
Cc: bochs-developers@lists.sourceforge.net, qemu-devel@nongnu.org
Subject: [Qemu-devel] Re: [Bochs-developers] [PATCH v5 1/5] Add S3 state to DSDT. Handle resume event in the BIOS.
Date: Sun, 7 Dec 2008 18:31:23 +0200 [thread overview]
Message-ID: <20081207163123.GA17456@redhat.com> (raw)
In-Reply-To: <20081207151044.GA30530@morn.localdomain>
On Sun, Dec 07, 2008 at 10:10:44AM -0500, Kevin O'Connor wrote:
> On Sun, Dec 07, 2008 at 11:20:31AM +0200, Gleb Natapov wrote:
> > On Sat, Dec 06, 2008 at 09:57:38PM -0500, Kevin O'Connor wrote:
> > > On Thu, Nov 27, 2008 at 01:02:25PM +0200, Gleb Natapov wrote:
> > > > + ;; Save shutdown status
> > > > + mov 0x04b0, bl
> > > > +
> > > > + cmp bl, #0xfe
> > > > + jz s3_post
> > > What sets 40:b0 to 0xfe on a resume?
> > Qemu/Bochs.
>
> Thanks.
>
> If we're going to set a flag to indicate a resume, I think we should
> use more than one byte to ensure we don't invoke that path on random
> memory. (Maybe something like 0x5333524d -- 'S3RM'?)
>
> Also, can the ACPI dsdt code set the flag instead of the emulators?
>
Sorry I gave you a wrong answer. Qemu/BOCHS write 0xfe to CMOS offset
0xf (reboot reason) and BIOS saves it into 40:b0. We cannot write into
CMOS from AML since windows doesn't like it.
--
Gleb.
next prev parent reply other threads:[~2008-12-07 16:30 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-27 11:02 [Qemu-devel] [PATCH v5 0/5] Support for S3 ACPI state (suspend to memory) in BIOS Gleb Natapov
2008-11-27 11:02 ` [Qemu-devel] [PATCH v5 1/5] Add S3 state to DSDT. Handle resume event in the BIOS Gleb Natapov
2008-12-07 2:57 ` [Qemu-devel] Re: [Bochs-developers] " Kevin O'Connor
2008-12-07 9:20 ` Gleb Natapov
2008-12-07 15:10 ` Kevin O'Connor
2008-12-07 16:31 ` Gleb Natapov [this message]
2008-12-09 22:26 ` [Qemu-devel] Re: [Bochs-developers] [PATCH v5 1/5] Add S3 state to DSDT.Handle " Sebastian Herbszt
2008-12-10 0:06 ` Kevin O'Connor
2008-12-10 10:22 ` Gleb Natapov
2008-12-09 13:38 ` [Qemu-devel] Re: [Bochs-developers] [PATCH v5 1/5] Add S3 state to DSDT. Handle " Gleb Natapov
2008-12-09 15:12 ` [Qemu-devel] " Stanislav
2008-12-14 22:02 ` [Qemu-devel] Re: [Bochs-developers] [PATCH v5 1/5] Add S3 state to DSDT.Handle " Sebastian Herbszt
2008-11-27 11:02 ` [Qemu-devel] [PATCH v5 2/5] Preserve memory content during SMM init Gleb Natapov
2008-11-27 11:02 ` [Qemu-devel] [PATCH v5 3/5] Execute rombios32 code from rom address 0xe0000 Gleb Natapov
2008-11-27 11:02 ` [Qemu-devel] [PATCH v5 4/5] Don't use unreserved memory in BIOS Gleb Natapov
2008-11-27 11:02 ` [Qemu-devel] [PATCH v5 5/5] Don't power down vga card on entering S3 state Gleb Natapov
2008-11-27 12:17 ` [Qemu-devel] [PATCH v5 0/5] Support for S3 ACPI state (suspend to memory) in BIOS Carl-Daniel Hailfinger
2008-11-27 12:35 ` Gleb Natapov
2008-11-27 18:59 ` [Bochs-developers] " Stanislav
2008-11-27 19:07 ` Carl-Daniel Hailfinger
2008-11-27 20:04 ` Stanislav
2008-11-27 21:04 ` Carl-Daniel Hailfinger
2008-11-29 19:42 ` Stanislav
2008-12-04 10:04 ` Carl-Daniel Hailfinger
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