[Virtio-fs] [virtiofsd] Issue opened: Add viommu support

[virtiofs-bot at sinrega.org]

We don't support viommu, so the guest kernel hung when trying to access the virtiofs-mount directory with viommu enabled.

Libkrun seems to have a patch. Sergio is planning to propose it to upstream linux kernel. That will use iommu if available, otherwise it falls back to swiommu in case of confidential computing setup.

Tracking:
https://bugzilla.redhat.com/show_bug.cgi?id=1976676

Related:
https://bugzilla.redhat.com/show_bug.cgi?id=1812886
---
https://gitlab.com/virtio-fs/virtiofsd/-/issues/68