Hi Alex, I think the arbiter fixes are in this patch set [1]. It is linked from the Arch Linux forum post[2]. I use the commands supplied there to run the guest. It is said there that when the guest is started up with the following, qemu-system-x86_64 -enable-kvm -M q35 -m 1024 -cpu host \ -smp 6,sockets=1,cores=6,threads=1 \ -bios /usr/share/qemu/bios.bin -vga none \ -device ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1 \ -device vfio-pci,host=07:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on \ -device vfio-pci,host=07:00.1,bus=root.1,addr=00.1 changed according to my setup, the monitor should display the seabios output on the monitor from the passthrough'd card. But I see no output. I also tried Xen today, the same problem is present but windows displays a different error this time: its code 10 (the device can't start up) with kvm, errors didn't appear until I installed nvidia drivers. On Xen it appeared on first boot after I installed Windows on guest. I run 3.14.1 + the patches[1] and qemu 2.0.50(built from git using a Arch pkg script[3]). 1. http://www.fileswap.com/dl/1XfOihk7x0/ 2. https://bbs.archlinux.org/viewtopic.php?id=162768&p=1 3. http://www.fileswap.com/dl/tpEVe6aHkq/ Thanks, - Madura A. On Sun, May 4, 2014 at 9:57 PM, Alex Williamson <alex.williamson@xxxxxxxxxx> wrote: > On Sun, 2014-05-04 at 15:05 +0530, Madura Anushanga wrote: >> Hi, >> >> I am trying to passthrough MSI GTX750 on MSI z87-GD65 GAMING >> motherboard with Intel 4770 processor. I have made sure that my >> hardware supports vt-d. I followed the instructions on [1] to do the >> passthrough. But when I run the test command for qemu(with no system >> installed) I get no display from the GTX750 the card works well but >> with qemu it doesn't give any output. >> >> I installed win7 on a virtual disk and loaded it in qemu and installed >> nvidia drivers, the card is seen by the drivers but I get the code 43 >> error. Seems the OS can't use the card even though it sees the card. >> What can I do to fix this? I run Xorg on the host with the IGP. > > Have you patched your kernel with the i915 VGA arbiter fixes? How are > you starting the guest? What versions of the kernel and qemu are you > using? Thanks, > > Alex > -- 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
