Thanks that got me a bit further. dmesg | grep AMD-Vi [ 0.233077] [Firmware Bug]: AMD-Vi: IOAPIC[9] not in IVRS table [ 0.233083] [Firmware Bug]: AMD-Vi: IOAPIC[10] not in IVRS table [ 0.233087] [Firmware Bug]: AMD-Vi: No southbridge IOAPIC found [ 0.233090] AMD-Vi: Disabling interrupt remapping [ 1.901086] AMD-Vi: Found IOMMU at 0000:00:00.2 cap 0x40 [ 1.917421] AMD-Vi: Lazy IO/TLB flushing enabled
Any starting point where I can find info on how to get iommu remapping in my kernel? > Op 7 mrt. 2016 om 18:48 heeft Alex Williamson <alex.l.william...@gmail.com> > het volgende geschreven: > >> On Mon, Mar 7, 2016 at 10:34 AM, Stein van Broekhoven <st...@aapjeisbaas.nl> >> wrote: >> Dear All, >> >> I can't get the video card which is using vfio to connect to my vm: >> lspci -nnk >> 06:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. >> [AMD/ATI] Turks XT [Radeon HD 6670/7670] [1002:6758] >> Subsystem: ASUSTeK Computer Inc. Device [1043:03ea] >> Kernel driver in use: vfio-pci >> Kernel modules: radeon, fglrx >> 06:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] >> Turks/Whistler HDMI Audio [Radeon HD 6000 Series] [1002:aa90] >> Subsystem: ASUSTeK Computer Inc. Device [1043:aa90] >> Kernel driver in use: vfio-pci >> Kernel modules: snd_hda_intel >> >> I start the vm from cli with qemu command with sudo >> The devices 06:00.0 and 06:00.1 are together in group 22 >> I added /dev/vfio/22 to acl in qemu config > > You should never need to touch this acl list, besides it's for libvirt which > you're not using if you're using the qemu command. > >> When using vfio_iommu_type1.allow_unsafe_interrupts=1 on start vm I get the >> error: >> stdout: >> qemu-system-x86_64: -device >> vfio-pci,host=06:00.0,addr=09.0,multifunction=on: vfio: Error: Failed to >> setup INTx fd: Device or resource busy >> qemu-system-x86_64: -device >> vfio-pci,host=06:00.0,addr=09.0,multifunction=on: Device initialization >> failed >> dmesg: >> genirq: Flags mismatch irq 55. 00000080 (vfio-intx(0000:06:00.0)) vs. >> 00000800 (fglrx[1]@PCI:6:0:0) >> >> Without vfio_iommu_type1.allow_unsafe_interrupts=1 on start vm I get the >> error: >> stdout: >> vfio: failed to set iommu for container: Operation not permitted >> dmesg: >> vfio_iommu_type1_attach_group: No interrupt remapping support. Use the >> module param "allow_unsafe_interrupts" to enable VFIO IOMMU support on this >> platform >> >> system: >> sabertooth 990FX v1.1 >> AMD FX-8120 >> main GPU: Radeon HD 5xxx >> VM GPU: Radeon HD 6xxx >> Manjaro (arch) kernel 4.1 > > looks like fglrx is still holding onto the IRQ and there's a flags mismatch, > you should prevent fglrx from claiming the GPU by using pci-stub or vfio-pci > to claim the device directly. 990FX should support interrupt remapping, so > it's likely not enabled in your kernel.
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