[RFC PATCH 0/12] iommu/riscv: Add nested translation (vIOMMU) support

[Jason Gunthorpe]

On Thu, Oct 15, 2026 at 02:52:20PM +0800, Gong Shuai wrote:
> Add nested translation support to the RISC-V IOMMU driver, so a KVM guest
> with its own vIOMMU can own the first stage of a device context while the
> host keeps the second stage, and add the interrupt support. This is an RFC
> and comments on the design are welcome.

The iommufd parts looked reasonable to me

I feel some mild skepticism about all the MSI parts, it would be good
to get more of the interrupt stuff actually landed before posting this
again.

Please try harder on the commit messages, do not use AI to write them
like this. They need to explain why this patch exists and what problem
it is solving not some inscrutible description of what it contains.

You'll need other riscv people to help you with reviewing it.

Jason