Re: [PATCH 4/6] iommu/generic_pt: Add Broadcom BCM2712 page table format

[Jason Gunthorpe]

On Sun, Jul 12, 2026 at 10:18:54PM +0100, Daniel Drake wrote:
> The BCM2712 IOMMU implements a 2-level page table format. It is relatively
> simple, with one unusual aspect: leaf entries can only be installed at
> Level 0.
> 
> Adapted from Raspberry Pi's downstream bcm2712-iommu driver (original
> author Nick Hollinghurst).
> 
> Signed-off-by: Daniel Drake <dan@xxxxxxxxxxxxxxx>
> ---
>  drivers/iommu/generic_pt/.kunitconfig        |   1 +
>  drivers/iommu/generic_pt/Kconfig             |  10 ++
>  drivers/iommu/generic_pt/fmt/Makefile        |   2 +
>  drivers/iommu/generic_pt/fmt/bcm2712.h       | 259 +++++++++++++++++++++++++++
>  drivers/iommu/generic_pt/fmt/defs_bcm2712.h  |  18 ++
>  drivers/iommu/generic_pt/fmt/iommu_bcm2712.c |  10 ++
>  include/linux/generic_pt/common.h            |   7 +
>  include/linux/generic_pt/iommu.h             |  13 ++
>  8 files changed, 320 insertions(+)

Looks straightforward to me!

Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>

Jason