Hi, This is a follow up to the first patchset [0] for supporting multiple vSMMU instances. This patchset implements support for specifying multiple <iommu> devices within the VM definition when smmuv3Dev IOMMU model is specified, and is tested with Shameer's recently accepted qemu series for user-creatable vSMMU devices [1] For instance, specifying the associated emulated device in a VM definition with multiple IOMMUs, configured to be routed to pcie-expander-bus or pcie-root controllers: <devices> <controller type='pci' index='0' model='pcie-root'/> <controller type='pci' index='1' model='pcie-expander-bus'> <model name='pxb-pcie'/> <target busNr='252'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/> </controller> <controller type='pci' index='2' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='2' port='0x0'/> <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </controller> ... <rng model='virtio'> <backend model='random'>/dev/urandom</backend> <address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/> </rng> <rng model='virtio'> <backend model='random'>/dev/urandom</backend> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </rng> <iommu model='smmuv3Dev'> <driver parentIdx='0'/> </iommu> <iommu model='smmuv3Dev'> <driver parentIdx='1'/> </iommu> </devices> This would get translated to a qemu command line with the arguments below. -device '{"driver":"pxb-pcie","bus_nr":252,"id":"pci.1","bus":"pcie.0","addr":"0x1"}' \ -device '{"driver":"pcie-root-port","port":0,"chassis":2,"id":"pci.2","bus":"pci.1","addr":"0x0"}' \ -device '{"driver":"arm-smmuv3","primary-bus":"pcie.0","id":"smmuv3.0"}' \ -device '{"driver":"arm-smmuv3","primary-bus":"pci.1","id":"smmuv3.1"}' \ ... -object '{"qom-type":"rng-random","id":"objrng0","filename":"/dev/urandom"}' \ -device '{"driver":"virtio-rng-pci","rng":"objrng0","id":"rng0","bus":"pci.2","addr":"0x0"}' \ -object '{"qom-type":"rng-random","id":"objrng1","filename":"/dev/urandom"}' \ -device '{"driver":"virtio-rng-pci","rng":"objrng1","id":"rng1","bus":"pcie.0","addr":"0x4"}' \ Changes from v1: - Moved parentIdx attribute under <driver> - Revised qemuxmlconfdata test cases to attach emulated devices This series is on Github: https://github.com/NathanChenNVIDIA/libvirt/tree/smmuv3Dev-no-accel-09-29-25 Thanks, Nathan [0] https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/3PYS3... [1] https://lore.kernel.org/qemu-devel/20250829082543.7680-1-skolothumtho@nvidia... Signed-off-by: Nathan Chen <nathanc@nvidia.com> Nathan Chen (4): qemu: add IOMMU model smmuv3Dev conf: Support multiple smmuv3Dev IOMMU devices tests: qemuxmlconfdata: provide smmuv3Dev sample XML and CLI args docs/formatdomain.rst | 9 +- src/conf/domain_conf.c | 101 +++++++-- src/conf/domain_conf.h | 11 +- src/conf/domain_validate.c | 58 +++-- src/conf/schemas/domaincommon.rng | 10 +- src/libvirt_private.syms | 2 + src/qemu/qemu_alias.c | 15 +- src/qemu/qemu_command.c | 202 ++++++++++++------ src/qemu/qemu_domain_address.c | 33 +-- src/qemu/qemu_driver.c | 8 +- src/qemu/qemu_postparse.c | 11 +- src/qemu/qemu_validate.c | 18 +- .../iommu-smmuv3Dev.aarch64-latest.args | 41 ++++ .../iommu-smmuv3Dev.aarch64-latest.xml | 62 ++++++ tests/qemuxmlconfdata/iommu-smmuv3Dev.xml | 49 +++++ tests/qemuxmlconftest.c | 1 + 16 files changed, 499 insertions(+), 132 deletions(-) create mode 100644 tests/qemuxmlconfdata/iommu-smmuv3Dev.aarch64-latest.args create mode 100644 tests/qemuxmlconfdata/iommu-smmuv3Dev.aarch64-latest.xml create mode 100644 tests/qemuxmlconfdata/iommu-smmuv3Dev.xml -- 2.43.0