nathan binkert wrote: >>>> Currently VGA pass-through is not supported in KVM. It needs much >>>> work to support it. >>> >>> Here's what I know of: >>> >>> - load the vga bios at 0xc0000 >>> - implement whatever main bios interfaces the vga vios expects >>> - pass through the vga I/O ports >>> >> I think it also needs: >> - map video RAM: 0xa0000 - 0xbffff >> - remove Qemu VGA device emulation >> - reserve enough guest memory space for PCI BARs (most >> graphics cards has more than 256M memory, I didn't check >> how much guest memory kvm reserve for PCI BARs) >> >> In addition, some graphics cards are specific, such as pBAR >> must equal to vBAR. To my feeling, there are some tricks to >> make it work. > > Hi All, > > Out of curiosity, has any progress been made on this? I tried to set > this up myself several months ago (KVM-84) with no luck as primary or > secondary. No matter what I did, if I passed through a video card, > kvm wouldn't even enter the bios. Presumably because of vga bios > issues. I even hacked the nvidia driver on my host system to make > certain that the host didn't touch the card at all. > If you didn't do above changes, obviously it won't work directly. We are working on VGA passthrough on Xen side now. KVM should be similiar. Basically we can reuse most of the code. We will post the code when we port it to KVM. Regards, Weidong -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
