[RFC PATCH 02/12] iommufd: Add RISC-V IOMMU hwpt and vIOMMU types

[Jason Gunthorpe]

On Thu, Oct 15, 2026 at 02:52:22PM +0800, Gong Shuai wrote:

> +/**
> + * struct iommu_hwpt_riscv - RISC-V IOMMU stage-1 page table data
> + *			     (IOMMU_HWPT_DATA_RISCV_S1)
> + * @tc: Guest device context translation control
> + * @iosatp: Guest device context stage-1 root page table pointer
> + */
> +struct iommu_hwpt_riscv {
> +	__aligned_u64 tc;
> +	__aligned_u64 iosatp;
> +};

Like the others you need a spec reference explaining exactly what
these fields are.

Usually it should be the entire guest structure, is it only 16 bytes?

But this looks broadly right otherwise

Jason