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Re: [Qemu-devel] [PATCH] Add an isa device for SGA
From: |
Glauber de Oliveira Costa |
Subject: |
Re: [Qemu-devel] [PATCH] Add an isa device for SGA |
Date: |
Wed, 11 May 2011 16:57:18 -0400 (EDT) |
----- Original Message -----
> From: "Jan Kiszka" <address@hidden>
> To: "Glauber Costa" <address@hidden>
> Cc: address@hidden, address@hidden, address@hidden, address@hidden,
> address@hidden
> Sent: Wednesday, May 11, 2011 5:00:10 PM
> Subject: Re: [PATCH] Add an isa device for SGA
> On 2011-05-11 19:11, Glauber Costa wrote:
> > This patch adds a dummy legacy ISA device whose responsibility is to
> > deploy sgabios, an option rom for a serial graphics adapter.
> > The proposal is that this device is always-on when -nographics,
> > but can otherwise be enable in any setup when -device sga is used.
>
> That means bios output is written to the virtual uart? Sounds
> interesting. Where do we find such an option rom?
code.google.com/p/sgabios
Plan is to include it in the set of roms distributed by QEMU.
> Alternatively, what about adding serial console support to SeaBIOS?
> I've
> seen real BIOSes that allow driving both VGA and serial in parallel.
> That could be controlled via -boot and some fwcfg, just like we
> request
> the boot menu today.
Possible, cleaner, but much more work.
I think using sgabios give us what we need for very little additional cost.
If someone would be willing to do the work in SeaBIOS, that would be another
story.
>
> Jan