I forgot to mention: I'm using the linux-vfio kernel, v4.8.13, and my only kernel options are intel_iommu=on and pcie_acs_override=downstream.
On 01/28/2017 06:13 AM, Tmplt wrote: > Having spent some hours (unsucessfully) to get stutter-free audio via > Pulseaudio (and ALSA) have left me with the options of either dual > booting or letting dedicated hardware handle the audio, which I can then > mix together into a single output. > > However, passing only the GPU as a soundcard and listening to the audio > via my monitor's headphone jack, there is some noticable audio > stuttering. While only noticable when running some more heavier games > (e.g. Battlefield 1), I'm guessing this shouldn't be the case, and that > I've configured something incorrectly. Especially since I've enabled > MSIs for both the GPU and the GPUs audio device. > > Here is what my system is: > CPU: i5-6600k @ stock > MOBO: ASUS Z170-A > RAM: 16GB DDR4 at 2133Mhz (I think, could be 1600) > GPU: ASUS R9 290 (for the VM; reference card) > > HOST OS: Arch Linux > GUEST OS: Windows 8.1 > > I run my VM via qemu (2.8.0) and libvirt (2.4.0). > > When Windows was installed it automatically enabled MSI for the GPU. I > manually enabled it for the audio device, rebooted, and confirmed that > they both appeared below the IRQ drop-down in the device manager. > > It can be worth of note that I flashed my card with a UEFI-bios some > time ago so that it got passed-through without issue. I can't recall > whether this was required for my qemu config at the time or if a > non-UEFI card can't be passed through. I'm also not sure if both BIOSes > (there is a switch to toggle between the two on my card) are overwritten > during the flash, or just the current one. Either case, the topical > issue is present on both settings. > > Here follows my libvirt .xml-config: > <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> > <name>windows</name> > <uuid>e3ec8ec6-087d-443a-8899-fab99b9251f2</uuid> > <memory unit='KiB'>8388608</memory> > <currentMemory unit='KiB'>8388608</currentMemory> > <vcpu placement='static'>4</vcpu> > <iothreads>2</iothreads> > <cputune> > <vcpupin vcpu='0' cpuset='0'/> > <vcpupin vcpu='1' cpuset='1'/> > <vcpupin vcpu='2' cpuset='2'/> > <vcpupin vcpu='3' cpuset='3'/> > </cputune> > <os> > <type arch='x86_64' machine='pc-i440fx-2.7'>hvm</type> > <loader readonly='yes' > type='pflash'>/usr/share/ovmf/x64/ovmf_x64.bin</loader> > <nvram>/var/lib/libvirt/qemu/nvram/windows_VARS.fd</nvram> > <bootmenu enable='no'/> > </os> > <features> > <acpi/> > <apic/> > <hyperv> > <relaxed state='on'/> > <vapic state='on'/> > <spinlocks state='on' retries='8191'/> > </hyperv> > <vmport state='off'/> > </features> > <cpu mode='host-passthrough'> > <topology sockets='1' cores='4' threads='1'/> > </cpu> > <clock offset='localtime'> > <timer name='rtc' tickpolicy='catchup'/> > <timer name='pit' tickpolicy='delay'/> > <timer name='hpet' present='no'/> > <timer name='hypervclock' present='yes'/> > </clock> > <on_poweroff>destroy</on_poweroff> > <on_reboot>restart</on_reboot> > <on_crash>restart</on_crash> > <pm> > <suspend-to-mem enabled='no'/> > <suspend-to-disk enabled='no'/> > </pm> > <devices> > <emulator>/usr/sbin/qemu-system-x86_64</emulator> > <disk type='block' device='disk'> > <driver name='qemu' type='raw' cache='none' io='threads' > iothread='1'/> > <source dev='/dev/sda'/> > <target dev='vdb' bus='virtio'/> > <boot order='3'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x08' > function='0x0'/> > </disk> > <disk type='block' device='disk'> > <driver name='qemu' type='raw' cache='none' io='threads' > iothread='2'/> > <source dev='/dev/sde2'/> > <target dev='vdc' bus='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' > function='0x0'/> > </disk> > <controller type='pci' index='0' model='pci-root'/> > <controller type='virtio-serial' index='0'> > <address type='pci' domain='0x0000' bus='0x00' slot='0x06' > function='0x0'/> > </controller> > <controller type='usb' index='0' model='piix3-uhci'> > <address type='pci' domain='0x0000' bus='0x00' slot='0x01' > function='0x2'/> > </controller> > <interface type='network'> > <mac address='52:54:00:20:63:3a'/> > <source network='default'/> > <model type='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x04' > function='0x0'/> > </interface> > <input type='mouse' bus='ps2'/> > <input type='keyboard' bus='ps2'/> > <hostdev mode='subsystem' type='pci' managed='yes'> > <source> > <address domain='0x0000' bus='0x02' slot='0x00' function='0x0'/> > </source> > <address type='pci' domain='0x0000' bus='0x00' slot='0x09' > function='0x0'/> > </hostdev> > <hostdev mode='subsystem' type='pci' managed='yes'> > <source> > <address domain='0x0000' bus='0x02' slot='0x00' function='0x1'/> > </source> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > </hostdev> > <memballoon model='none'/> > </devices> > <qemu:commandline> > <qemu:arg value='-object'/> > <qemu:arg > value='input-linux,id=kbd,evdev=/dev/input/by-id/usb-04d9_USB_Keyboard-event-kbd,grab_all=yes,repeat=yes'/> > <qemu:arg value='-object'/> > <qemu:arg > value='input-linux,id=mouse,evdev=/dev/input/by-id/usb-La-VIEW_CO._QPAD_Gaming_Mouse-event-mouse'/> > <qemu:arg value='-object'/> > <qemu:arg > value='input-linux,id=mouse-thumb,evdev=/dev/input/by-id/usb-La-VIEW_CO._QPAD_Gaming_Mouse-if01-event-kbd'/> > </qemu:commandline> > </domain> > > Have I done anything wrong here? > > Cheers, > Tmplt. > _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
