[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] Re: approaches to 3D virtualisation
From: |
Juan Quintela |
Subject: |
[Qemu-devel] Re: approaches to 3D virtualisation |
Date: |
Sat, 12 Dec 2009 13:08:18 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) |
Dave Airlie <address@hidden> wrote:
>>>
>>> Current existing solutions in the area:
>>> a) VMware virtual graphics adapter - based on DX9, has an open
>>> KMS/Gallium3D driver stack recently released by vmware, has certified
>>> Windows drivers and has a documented vGPU interface (it could be
>>> documented a lot better)
>
> http://vmware-svga.svn.sourceforge.net/viewvc/vmware-svga/trunk/doc/gpu-wiov.pdf?revision=1
>
> is a good whitepaper on the different 3D virtualisation approaches and why
> vmware picked what they did also.
>
> Dave.
I have zero clue of 3D, but for the qemu part, vmware_vga is the "nicer"
driver.
On the size department:
(virtio-2*)$ wc -l vga.c cirrus_vga.c vmware_vga.c
2380 vga.c
3235 cirrus_vga.c
1211 vmware_vga.c
(notice that part of vga.c is used by both vwmare_vga and cirrus_vga).
On the features, vmware_vga has a nice feature: xrandr already works
(i.e. you can have any modern resolution that you like), cirrus and
vga_std have much less options here.
vmware_vga also has Xvideo (or something) that improves video support.
once telling that, the 3 drivers need a big cleanup.
- vga.c -> VBE is optional (#ifdef'd) but you can't compile it out.
- cirrus_vga -> uses all vga.c code minus the vbe code. Replicates
several big functions (switch) for only changing a couple of lines
there.
- vmware_vga. Lets say that the way that it embeds an vga is
_interesting_ to say the less. Also the vga can be compiled out, but
not bios/os on earth will boot without its support.
I did some cleanups of the three drivers some months ago, but they need
much more care. I didn't follow due to time constraints and my zero
knowledge of graphics (hardware/software/...).
Later, Juan.
Re: [Qemu-devel] approaches to 3D virtualisation, Mark Williamson, 2009/12/12
Re: [Qemu-devel] approaches to 3D virtualisation, Paul Brook, 2009/12/14