RE: [PATCH v2 00/19] iommufd: Add VIOMMU infrastructure (Part-1)

From: Nicolin Chen nicolinc@nvidia.com Sent: Wednesday, August 28, 2024 1:00 AM

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On a multi-IOMMU system, the VIOMMU object can be instanced to the number of vIOMMUs in a guest VM, while holding the same parent HWPT to share the

Is there restriction that multiple vIOMMU objects can be only created on a multi-IOMMU system?

stage-2 IO pagetable. Each VIOMMU then just need to only allocate its own VMID to attach the shared stage-2 IO pagetable to the physical IOMMU:

this reads like 'VMID' is a virtual ID allocated by vIOMMU. But from the entire context it actually means the physical 'VMID' allocated on the associated physical IOMMU, correct?