[RFC PATCH v2 05/18] iommu/riscv: Prepare to use MSI table

[Nutty.Liu]

On 9/21/2025 4:38 AM, Andrew Jones wrote:
> Capture the IMSIC layout from its config and reserve all the addresses.
> Then use the IMSIC layout info to calculate the maximum number of PTEs
> the MSI table needs to support and allocate the MSI table when attaching
> a paging domain for the first time. Finally, at the same time, map the
> IMSIC addresses in the stage1 DMA table when the stage1 DMA table is not
> BARE. This ensures it doesn't fault as it will translate the addresses
> before the MSI table does.
>
> Signed-off-by: Andrew Jones <ajones at ventanamicro.com>
> ---
>   drivers/iommu/riscv/iommu-ir.c | 186 +++++++++++++++++++++++++++++++++
>   drivers/iommu/riscv/iommu.c    |   6 ++
>   drivers/iommu/riscv/iommu.h    |   4 +
>   3 files changed, 196 insertions(+)
Reviewed-by: Nutty Liu <nutty.liu at hotmail.com>

Thanks,
Nutty