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. ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
