V5 support was broken in a few different ways:
- tpu device files (/dev/vfio/X) were created with incorrect minor device nums.
- PCI paths on bus' other than 0000:00 were not supported.
- VFIO unmap was broken and not properly added to the seccomp allowlist.
- The VFIO main device file (/dev/vfio/vfio) did not account for overlapping
device address ranges that correspond to different VFIO container groups.
Previously TPU support was tested on machines with single TPUs, which masked
most of these issues.
All these issues should be fixed by this change. Tested manually on GKE.
PiperOrigin-RevId: 656037853
Lucas ManningandgVisor bot
Jing ChenandgVisor bot