From: Gleb Natapov <gleb@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: seabios@seabios.org, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 3/3] Get system state configuration from QEMU and patch DSDT with it.
Date: Sun, 20 May 2012 15:15:39 +0300 [thread overview]
Message-ID: <20120520121539.GJ10209@redhat.com> (raw)
In-Reply-To: <4FB8D933.5070800@redhat.com>
On Sun, May 20, 2012 at 02:44:51PM +0300, Avi Kivity wrote:
> On 05/20/2012 12:03 PM, Gleb Natapov wrote:
> > QEMU may want to disable guest's S3/S4 support and it wants to distinguish
> > between regular powerdown and S4 powerdown. To support that new fw_cfg
> > option was added that passes supported system states and what value should
> > guest use to enter each state. States are passed in 6 byte array. Each
> > byte represents one system state. If byte at offset X has its MSB set
> > it means that system state X is supported and to enter it guest should
> > use the value from lowest 7 bits. Patch also detects old QEMU and uses
> > values that work in backwards compatible way there.
> >
>
>
> Do we actually have to patch the DSDT? Or can _S3 etc be made into
> functions instead? (and talk to the bios, or even to fwcfg directly?)
>
We better not talk to fwcfg after OSPM is started since this is firmware
confing interface. Regardless, presence of _S3 name or method is all
that needed for OS enabling S3 option. If _S3 is defined as a method it
has to return Package() otherwise iasl refuses to compile it.
--
Gleb.
next prev parent reply other threads:[~2012-05-20 12:15 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-20 9:03 [Qemu-devel] [PATCH 1/3] Fix aml_name_string() to recognize block name modifiers Gleb Natapov
2012-05-20 9:03 ` [Qemu-devel] [PATCH 2/3] Add ACPI_EXTRACT_PKG_START macro parsing Gleb Natapov
2012-05-20 9:03 ` [Qemu-devel] [PATCH 3/3] Get system state configuration from QEMU and patch DSDT with it Gleb Natapov
2012-05-20 11:44 ` Avi Kivity
2012-05-20 12:15 ` Gleb Natapov [this message]
2012-05-20 12:30 ` Avi Kivity
2012-05-20 12:36 ` Gleb Natapov
2012-05-20 12:47 ` Avi Kivity
2012-05-20 12:59 ` Gleb Natapov
2012-05-20 13:39 ` Avi Kivity
2012-05-20 13:57 ` Gleb Natapov
2012-05-20 14:34 ` Avi Kivity
2012-05-20 14:43 ` Gleb Natapov
2012-05-20 14:46 ` Avi Kivity
2012-05-20 15:15 ` Gleb Natapov
2012-05-20 16:16 ` Kevin O'Connor
2012-05-20 16:25 ` Avi Kivity
2012-05-20 16:39 ` Kevin O'Connor
2012-05-20 16:49 ` Gleb Natapov
2012-05-20 16:11 ` Kevin O'Connor
2012-05-20 10:32 ` [Qemu-devel] [SeaBIOS] [PATCH 1/3] Fix aml_name_string() to recognize block name modifiers Alon Levy
2012-05-20 11:13 ` Gleb Natapov
2012-05-23 1:23 ` [Qemu-devel] " Kevin O'Connor
2012-06-20 13:08 ` Gleb Natapov
2012-06-22 1:06 ` Kevin O'Connor
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