Hello.
I've found the cause of the problem.
GeForce RTX 2060 Super has four components:
02:00.0 VGA compatible controller [0300]: NVIDIA Corporation Device
[10de:1f06] (rev a1) (prog-if 00 [VGA controller])
02:00.1 Audio device [0403]: NVIDIA Corporation TU106 High Definition
Audio Controller [10de:10f9] (rev a1)
02:00.2 USB controller [0c03]: NVIDIA Corporation TU106 USB 3.1 Host
Controller [10de:1ada] (rev a1) (prog-if 30 [XHCI])
02:00.3 Serial bus controller [0c80]: NVIDIA Corporation TU106 USB
Type-C Port Policy Controller [10de:1adb] (rev a1)
And all of them are included to iommu group:
[ 0.890405] iommu: Adding device 0000:02:00.0 to group 11
[ 0.890422] iommu: Adding device 0000:02:00.1 to group 11
[ 0.890437] iommu: Adding device 0000:02:00.2 to group 11
[ 0.890453] iommu: Adding device 0000:02:00.3 to group 11
If I use all of them as the option for vfio-pci:
options vfio-pci ids=10de:1f06,10de:10f9,10de:1ada,10de:1adb
I get:
"vfio 0000:02:00.0: failed getting region info for VGA region index 8:
Invalid argument
device does not support requested feature x-vga"
But if I use only first three of them as the option for vfio-pci:
options vfio-pci ids=10de:1f06,10de:10f9,10de:1ada
then everything works properly (GPU successfully works in the guest OS).
Thanks.
Is your host kernel built with CONFIG_VFIO_PCI_VGA=y?
Yes. My kernel vfio settings:
CONFIG_VFIO_IOMMU_TYPE1=m
CONFIG_VFIO_VIRQFD=m
CONFIG_VFIO=m
# CONFIG_VFIO_NOIOMMU is not set
CONFIG_VFIO_PCI=m
CONFIG_VFIO_PCI_VGA=y
CONFIG_VFIO_PCI_MMAP=y
CONFIG_VFIO_PCI_INTX=y
CONFIG_VFIO_PCI_IGD=y
# CONFIG_VFIO_MDEV is not set
Are you
disabling that support with the disable_vga=1 module option of
vfio-pci?
I've tried both variants: with disable_vga=1 module option and without
it - same result.
On Tue, 31 Mar 2020 21:35:33 +0300
Артем Семенов <artem semenov jarillolabs com> wrote:
Hello!
I try to passthrough GPU to the virtual machine (qemu). I've tried
different variants:
-device
vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on
or
-device vfio-pci,host=02:00.0,x-vga=on
and other but in any case I get error:
vfio 0000:02:00.0: failed getting region info for VGA region index 8:
Invalid argument
device does not support requested feature x-vga
dmesg contains:
[ 844.599821] vfio_ecap_init: 0000:02:00.0 hiding ecap 0x1e 0x258
[ 844.599860] vfio_ecap_init: 0000:02:00.0 hiding ecap 0x19 0x900
If I remove x-vga=on option then qemu works but there is no signal from
GPU (black screen).
It looks like http://vfio.blogspot.com/2014/08/vfiovga-faq.html
"Question 3:
I have Intel host graphics, when I start the VM I don't get any output
on the assigned VGA monitor... "
I've tried to use 2 versions of the kernel: 4.19 and 5.4 - no
difference.
Moterboard: ASUS PRIME H370-A.
GPU: ASUS Turbo GeForce RTX 2060 Super.
What could be the cause of this problem?
Is your host kernel built with CONFIG_VFIO_PCI_VGA=y? Are you
disabling that support with the disable_vga=1 module option of
vfio-pci? Thanks,
Alex
--
With best regards,
Artem Semenov mailto:artem.seme...@jarillolabs.com
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