Fix the odd VFIO error for a non-existent mdev when IOMMU is disabled

[libvirt] [PATCH v2 0/2] Fix the odd VFIO error for a non-existent mdev when IOMMU is disabled

Erik Skultety posted 2 patches 6 years, 1 month ago

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Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/libvirt tags/patchew/cover.1521203584.git.eskultet@redhat.com

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src/qemu/qemu_hostdev.c |  7 ++++++-
src/util/virmdev.c      | 16 +++++++++++++---
2 files changed, 19 insertions(+), 4 deletions(-)

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[libvirt] [PATCH v2 0/2] Fix the odd VFIO error for a non-existent mdev when IOMMU is disabled

Posted by Erik Skultety 6 years, 1 month ago

Unlike GPU assignment, mdev doesn't need the IOMMU to be enabled within kernel,
since the physical parent device takes care of the isolation, i.e. there's an
IOMMU group entry for each mdev created under sysfs, thus a VM can start
successfully.

Since v1:
- adjusted the error msg in patch 1 according to reviewer
- rephrased the commit message for patch 2 to make it less confusing

Erik Skultety (2):
  util: mdev: Improve the error msg on non-existent mdev prior to VM
    start
  qemu: hostdev: Fix the error on VM start with an mdev when IOMMU is
    off

 src/qemu/qemu_hostdev.c |  7 ++++++-
 src/util/virmdev.c      | 16 +++++++++++++---
 2 files changed, 19 insertions(+), 4 deletions(-)

--
2.13.6

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