Heads up to anyone running the latest vanilla kernels - after upgrade from 5.4.21 to 5.4.22 one of my VMs lost access to a vfio1 passed-through GPU. This was restored when I downgraded to 5.4.21 so the problem seems related to some patch in version 5.4.22
Also, when starting the VM, I noticed the hypervisor log flooded with messages "BAR 3: can't reserve" like: Feb 24 09:49:38 gdansk.lan.incorrekt.net kernel: vfio-pci 0000:03:00.0: vfio_ecap_init: hiding ecap 0x1e@0x258 Feb 24 09:49:38 gdansk.lan.incorrekt.net kernel: vfio-pci 0000:03:00.0: vfio_ecap_init: hiding ecap 0x19@0x900 Feb 24 09:49:38 gdansk.lan.incorrekt.net kernel: vfio-pci 0000:03:00.0: BAR 3: can't reserve [mem 0xc0000000-0xc1ffffff 64bit pref] Feb 24 09:49:38 gdansk.lan.incorrekt.net kernel: vfio-pci 0000:03:00.0: No more image in the PCI ROM Feb 24 09:51:43 gdansk.lan.incorrekt.net kernel: vfio-pci 0000:03:00.0: BAR 3: can't reserve [mem 0xc0000000-0xc1ffffff 64bit pref] Feb 24 09:51:43 gdansk.lan.incorrekt.net kernel: vfio-pci 0000:03:00.0: BAR 3: can't reserve [mem 0xc0000000-0xc1ffffff 64bit pref] Feb 24 09:51:43 gdansk.lan.incorrekt.net kernel: vfio-pci 0000:03:00.0: BAR 3: can't reserve [mem 0xc0000000-0xc1ffffff 64bit pref] Feb 24 09:51:43 gdansk.lan.incorrekt.net kernel: vfio-pci 0000:03:00.0: BAR 3: can't reserve [mem 0xc0000000-0xc1ffffff 64bit pref] Feb 24 09:51:43 gdansk.lan.incorrekt.net kernel: vfio-pci 0000:03:00.0: BAR 3: can't reserve [mem 0xc0000000-0xc1ffffff 64bit pref] journalctl -b-2 | grep "vfio-pci 0000:03:00.0: BAR 3: can't reserve" | wc -l 2609 Finally, when shutting down the VM I observed kernel panic on the hypervisor: [ 873.831301] Kernel panic - not syncing: Timeout: Not all CPUs entered broadcast exception handler [ 874.874008] Shutting down cpus with NMI [ 874.888189] Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 875.074319] Rebooting in 30 seconds.. B. -- Bronek Kozicki b...@incorrekt.com _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
