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Re: [Qemu-devel] [PATCH 2/2] Get system state configuration from QEMU an

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 2/2] Get system state configuration from QEMU and patcth DSDT with it.
Date: Thu, 17 May 2012 12:01:35 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1

Il 17/05/2012 02:24, Kevin O'Connor ha scritto:
>> > Can we build an SSDT that includes the contents of fw_cfg (e.g.
>> > FW_CFG_SIGNATURE at offset 0, FW_CFG_UUID at offset 4, FW_CFG_NOGRAPHIC
>> > at offset 16... the entry <-> offset mapping and the defaults would be
>> > part of SeaBIOS), and then read that data from normal DSDT methods?
>> > 
>> > That would be similar to Gerd's patch, but without letting the OSPM use
>> > the real fw_cfg device.
> I'm not sure I understand your proposal.  Are you suggesting reading
> every fw_cfg "port" into memory and then passing that memory into an
> SSDT?  If so, that wouldn't be easy (we don't necessarily know the
> size of each "port") and could potentially waste a lot of memory
> (think a vmlinuz stored in fw_cfg).

No, only entries and/or files that are needed by the DSDT (PCI region
and sleep data).


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