On Wed, 26 Jul 2017 19:51:12 +0200 Geert Coulommier <g.coulomm...@gmail.com> wrote:
> Hi, > > I've been trying to get IGD passthrough to work on an ubuntu 17.04 into > linux VM's (Ubuntu 16.04) on an Apollo Lake J3455, using mainly Alex' blog > and this mailing list as a guide, but I keep ending up with a black screen. > > There is no other graphics card, so I've been trying with Seabios and the > legacy method. I915 is blacklisted. The host is an Ubuntu 17.04 server with > the Linux kernel upgraded to 4.12.3. Qemu is on 2.8. > > I also tried to passthrough the audio card with the same method, and this > worked without a glitch. > > >From an extract of the dmesg logfile (see below in [8]) it seems that I'm > also running into the BAR 2 error: > [ 192.797993] vfio-pci 0000:00:02.0: BAR 2: can't reserve [mem > 0x80000000-0x8fffffff 64bit pref] I'd say you have two options, 1) look in /proc/iomem and identify the driver that's still claiming portions of IGD and disable it, or 2) don't blacklist i915, let the kernel boot with it, then do a 'virsh nodedev-detach pci_0000_00_02_0' at boot before starting the VM so that you're not binding it back to i915 after every instance of running the VM. > 00:0e.0 Audio device [0403]: Intel Corporation Celeron N3350/Pentium > N4200/Atom E3900 Series Audio Cluster [8086:5a98] (rev 0b) > Subsystem: ASRock Incorporation Atom/Celeron/Pentium Processor > N4200/N3350/E3900 Series Audio Cluster [1849:c892] > Kernel driver in use: vfio-pci > Kernel modules: snd_hda_intel, snd_soc_skl ... > [ 192.668847] vfio_cap_init: 0000:00:0e.0 pci config conflict @0x80, was > cap 0x9 now cap 0x10 > [ 192.668851] vfio_cap_init: 0000:00:0e.0 pci config conflict @0x81, was > cap 0x9 now cap 0x10 > [ 192.668853] vfio_cap_init: 0000:00:0e.0 pci config conflict @0x82, was > cap 0x9 now cap 0x10 > [ 192.668855] vfio_cap_init: 0000:00:0e.0 pci config conflict @0x83, was > cap 0x9 now cap 0x10 Hmm, seems we're not super happy parsing this device's config space, can you provide 'sudo lspci -xxxxs 0000:00:0e.0'. I don't think this is related to the IGD issue though. Thanks, Alex _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
