Hi,
Looks like I will have to do some reading about what has been posted so far.
Thanks Ghiora
On Nov 12, 2007 10:27 AM, Dor Laor <[EMAIL PROTECTED]> wrote:
> Caleb Moore wrote:
>
> On Sun, 2007-11-11 at 18:46 +0200, Ghiora Drori wrote:
>
>
> Hi,
> I am interested in supporting NVDIA, ATI, Intel and presumably other
> display cards when running a windows guest KVM. The idea is to get
> Windows XP games to work properly under kvm when being hosted by
> Linux.
> The screen on Linux can have more then one X windows server running on
> different TTYs and it looks (I have not checked the code) like each is
> running separately (aka there is a store and initialize when switching
> between them) so when a kvm guest would get such a screen it would
> have direct access to the display hardware.
> I searched Google but did not find anything significant.
> Any ideas where to start?
>
>
> For that it would probably be simplest to allow the VMM to write to the
> AGP/PCIe device.
>
> An graphics card hardware interface consists of two parts, a normal PCI
> device and a GART. The PCI interface is pretty simple, it's just a table
> containing useful information about memory regions, IRQs and IOports
> that the device will read/write to. You'll need to make an emulated PCI
> device that will map in real regions of the physical address space into
> the virtual machine. The GART is a little bit more complex, it will
> require a virtualised GART driver for your guest kernel that requests
> memory regions from the host kernel's GART interface, puts them in the
> guests address space and returns their addresses to the guest kernel.
>
> I hope that helps.
>
>
>
>
> Some of the work was released already by us and some will be released
> soon:
> If you have 1-1 mapping between the guest addresses and the host you solve
> the gart mapping:
> http://lkml.org/lkml/2007/10/21/125.
> We also released pci passthrough and irq forwarding for qemu/kvm.
> http://news.gmane.org/gmane.comp.emulators.kvm.devel/cutoff=9470
> Together you can make it work (we have a passthrough NIC working).
> Dor.
>
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