qemu: Use pci_bus to identify multi-smmuv3 model

[PATCH 0/1] qemu: Use pci_bus to identify multi-smmuv3 model

Nathan Chen via Devel posted 1 patch 1 week, 2 days ago

Download series mbox

Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/libvirt tags/patchew/20251202195947.3388438-1-nathanc@nvidia.com

src/qemu/qemu_command.c   | 2 +-
src/qemu/qemu_postparse.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

Expand all Fold all

[PATCH 0/1] qemu: Use pci_bus to identify multi-smmuv3 model

Posted by Nathan Chen via Devel 1 week, 2 days ago

The previous qemu virt-machine smmuv3 model and the new arm-smmuv3
model cannot both be specified at the same time. When launching
a Libvirt VM with a single arm-smmuv3 model denoted by the
<pciBus> attribute, qemuBuildMachineCommandLine() still appends
the iommu=smmuv3 -machine parameter in addition to the arm-smmuv3
model passed to -device, preventing the VM from booting. 

Use the presence of a non-negative pci_bus to
identify the multi-smmuv3 IOMMU model, instead of the
niommus attribute. This allows for specifying a single
arm-smmuv3 on the qemu command line, instead of both
the virt-machine smmuv3 and arm-smmuv3 being specified
at the same time.

This patch is available on Github [0].

[0] https://github.com/NathanChenNVIDIA/libvirt/commits/single-smmuv3-12-25/

Signed-off-by: Nathan Chen <nathanc@nvidia.com>

Nathan Chen (1):
  qemu: Use pci_bus to identify multi-smmuv3 model

 src/qemu/qemu_command.c   | 2 +-
 src/qemu/qemu_postparse.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

-- 
2.43.0