Hello, the same problem after upgrade to 4.2.1 :(

18.01.2018 11:53, Daniel Helgenberger пишет:

yesterday I upgraded to 4.2.0 from 4.1.8.

Now I notice I cannot assign host dev pass though any more; in the GUI
the 'Pinnded to host' list is empty; I cannot select any host for pass
through host pinning.

When I was creating the particular VM in 4.1 it was working as expected.

The hostdev from before the upgrades are still present. I tried to
remove them and got an NPE (see below).

As a workaround, is the old hostusb[1] method I know back from 3.x still 
working in the 4.x

AFAICT IOMMU is working

dmesg | grep -e DMAR -e IOMMU
[    0.000000] ACPI: DMAR 000000007b7e7000 002C6 (v01 HP     ProLiant 00000001 
HP   00000001)
[    0.168032] DMAR: Host address width 46
[    0.168034] DMAR: DRHD base: 0x000000fbffc000 flags: 0x0
[    0.168047] DMAR: dmar0: reg_base_addr fbffc000 ver 1:0 cap 8d2078c106f0466 
ecap f020de
[    0.168050] DMAR: DRHD base: 0x000000c7ffc000 flags: 0x1
[    0.168061] DMAR: dmar1: reg_base_addr c7ffc000 ver 1:0 cap 8d2078c106f0466 
ecap f020de
[    0.168063] DMAR: RMRR base: 0x00000079174000 end: 0x00000079176fff
[    0.168065] DMAR: RMRR base: 0x000000791f4000 end: 0x000000791f7fff
[    0.168067] DMAR: RMRR base: 0x000000791de000 end: 0x000000791f3fff
[    0.168070] DMAR: RMRR base: 0x000000791cb000 end: 0x000000791dbfff
[    0.168071] DMAR: RMRR base: 0x000000791dc000 end: 0x000000791ddfff
[    0.168073] DMAR: ATSR flags: 0x0
[    0.168075] DMAR: ATSR flags: 0x0
[    0.168079] DMAR-IR: IOAPIC id 10 under DRHD base  0xfbffc000 IOMMU 0
[    0.168082] DMAR-IR: IOAPIC id 8 under DRHD base  0xc7ffc000 IOMMU 1
[    0.168084] DMAR-IR: IOAPIC id 9 under DRHD base  0xc7ffc000 IOMMU 1
[    0.168086] DMAR-IR: HPET id 0 under DRHD base 0xc7ffc000
[    0.168088] DMAR-IR: Queued invalidation will be enabled to support x2apic 
and Intr-remapping.
[    0.169073] DMAR-IR: Enabled IRQ remapping in x2apic mode

[1] https://www.ovirt.org/develop/release-management/features/virt/hostusb/

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