So I'm getting ready to check out VGA passthrough and I've already hit a roadblock! The video card I want to pass through from 18.04 to Windows 10 does not seem to show up when I list IOMMU mappings??
My system: ASUS Zenith Extreme X399 / Threadripper 1950X / 128G
AMD-Vi / IOMMU / SVM is supported:
As you can see here, I have two NVIDIA cards installed:
It's the 1080 Ti that I want to pass through, so Bus Number 43:00.0 and PCI IDs 10de:1b06 for the video.
So - I want to figure out what IOMMU group this card is in, looking for the group with 43:00 in it, but it doesn't show up!? What am I missing?
What am I missing? There are 22 IOMMU groups, none of which appear to have the bus 43:00
Anyone have any ideas? One thing I plan to try next is swapping the 1070 and 1080Ti PCI slots to see if then the 1080Ti is assigned an IOMMU group. Both slots are 16x, but for some reason slot 1 is mentioned as preferred if there is only one video card; not sure why ...
Thanks!
Steve
My system: ASUS Zenith Extreme X399 / Threadripper 1950X / 128G
AMD-Vi / IOMMU / SVM is supported:
Code:
steve@Threadripper:~$ dmesg | grep AMD-Vi
[ 0.000000] AMD-Vi: Using IVHD type 0x11
[ 0.000000] AMD-Vi: device: 00:00.2 cap: 0040 seg: 0 flags: b0 info 0000
[ 0.000000] AMD-Vi: mmio-addr: 00000000efd00000
[ 0.000000] AMD-Vi: DEV_SELECT_RANGE_START devid: 00:01.0 flags: 00
[ 0.000000] AMD-Vi: DEV_RANGE_END devid: 3f:1f.6
[ 0.000000] AMD-Vi: DEV_ALIAS_RANGE devid: ff:00.0 flags: 00 devid_to: 00:14.4
[ 0.000000] AMD-Vi: DEV_RANGE_END devid: ff:1f.7
[ 0.000000] AMD-Vi: DEV_SPECIAL(HPET[0]) devid: 00:14.0
[ 0.000000] AMD-Vi: DEV_SPECIAL(IOAPIC[128]) devid: 00:14.0
[ 0.000000] AMD-Vi: DEV_SPECIAL(IOAPIC[129]) devid: 00:00.1
[ 0.963212] AMD-Vi: IOMMU performance counters supported
[ 0.976701] AMD-Vi: Found IOMMU at 0000:00:00.2 cap 0x40
[ 0.976703] AMD-Vi: Extended features (0xf77ef22294ada):
[ 0.976707] AMD-Vi: Interrupt remapping enabled
[ 0.976708] AMD-Vi: virtual APIC enabled
[ 0.977001] AMD-Vi: Lazy IO/TLB flushing enabled
steve@Threadripper:~$ dmesg | grep -E "IOMMU"
[ 0.963212] AMD-Vi: IOMMU performance counters supported
[ 0.976701] AMD-Vi: Found IOMMU at 0000:00:00.2 cap 0x40
[ 0.978961] perf/amd_iommu: Detected AMD IOMMU #0 (2 banks, 4 counters/bank).Code:
steve@Threadripper:~$ lspci | grep VGA
0a:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1070] (rev a1)
43:00.0 VGA compatible controller: NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] (rev a1)Code:
steve@Threadripper:~$ lspci -nn | grep 43:00.
43:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP102 [GeForce GTX 1080 Ti] [10de:1b06] (rev a1)
43:00.1 Audio device [0403]: NVIDIA Corporation GP102 HDMI Audio Controller [10de:10ef] (rev a1)Code:
steve@Threadripper:~$ for a in /sys/kernel/iommu_groups/*; do find $a -type l; done | sort --version-sort
/sys/kernel/iommu_groups/0/devices/0000:00:01.0
/sys/kernel/iommu_groups/1/devices/0000:00:01.1
/sys/kernel/iommu_groups/2/devices/0000:00:01.3
/sys/kernel/iommu_groups/3/devices/0000:00:02.0
/sys/kernel/iommu_groups/4/devices/0000:00:03.0
/sys/kernel/iommu_groups/5/devices/0000:00:03.1
/sys/kernel/iommu_groups/6/devices/0000:00:04.0
/sys/kernel/iommu_groups/7/devices/0000:00:07.0
/sys/kernel/iommu_groups/8/devices/0000:00:07.1
/sys/kernel/iommu_groups/9/devices/0000:00:08.0
/sys/kernel/iommu_groups/10/devices/0000:00:08.1
/sys/kernel/iommu_groups/11/devices/0000:00:14.0
/sys/kernel/iommu_groups/11/devices/0000:00:14.3
/sys/kernel/iommu_groups/12/devices/0000:00:18.0
/sys/kernel/iommu_groups/12/devices/0000:00:18.1
/sys/kernel/iommu_groups/12/devices/0000:00:18.2
/sys/kernel/iommu_groups/12/devices/0000:00:18.3
/sys/kernel/iommu_groups/12/devices/0000:00:18.4
/sys/kernel/iommu_groups/12/devices/0000:00:18.5
/sys/kernel/iommu_groups/12/devices/0000:00:18.6
/sys/kernel/iommu_groups/12/devices/0000:00:18.7
/sys/kernel/iommu_groups/13/devices/0000:00:19.0
/sys/kernel/iommu_groups/13/devices/0000:00:19.1
/sys/kernel/iommu_groups/13/devices/0000:00:19.2
/sys/kernel/iommu_groups/13/devices/0000:00:19.3
/sys/kernel/iommu_groups/13/devices/0000:00:19.4
/sys/kernel/iommu_groups/13/devices/0000:00:19.5
/sys/kernel/iommu_groups/13/devices/0000:00:19.6
/sys/kernel/iommu_groups/13/devices/0000:00:19.7
/sys/kernel/iommu_groups/14/devices/0000:01:00.0
/sys/kernel/iommu_groups/14/devices/0000:01:00.1
/sys/kernel/iommu_groups/14/devices/0000:01:00.2
/sys/kernel/iommu_groups/14/devices/0000:02:00.0
/sys/kernel/iommu_groups/14/devices/0000:02:01.0
/sys/kernel/iommu_groups/14/devices/0000:02:02.0
/sys/kernel/iommu_groups/14/devices/0000:02:03.0
/sys/kernel/iommu_groups/14/devices/0000:02:04.0
/sys/kernel/iommu_groups/14/devices/0000:02:09.0
/sys/kernel/iommu_groups/14/devices/0000:03:00.0
/sys/kernel/iommu_groups/14/devices/0000:04:00.0
/sys/kernel/iommu_groups/14/devices/0000:05:00.0
/sys/kernel/iommu_groups/14/devices/0000:08:00.0
/sys/kernel/iommu_groups/15/devices/0000:09:00.0
/sys/kernel/iommu_groups/16/devices/0000:0a:00.0
/sys/kernel/iommu_groups/16/devices/0000:0a:00.1
/sys/kernel/iommu_groups/17/devices/0000:0b:00.0
/sys/kernel/iommu_groups/18/devices/0000:0b:00.2
/sys/kernel/iommu_groups/19/devices/0000:0b:00.3
/sys/kernel/iommu_groups/20/devices/0000:0c:00.0
/sys/kernel/iommu_groups/21/devices/0000:0c:00.2
/sys/kernel/iommu_groups/22/devices/0000:0c:00.3Anyone have any ideas? One thing I plan to try next is swapping the 1070 and 1080Ti PCI slots to see if then the 1080Ti is assigned an IOMMU group. Both slots are 16x, but for some reason slot 1 is mentioned as preferred if there is only one video card; not sure why ...
Thanks!
Steve