[PATCH v8 3/7] iommu: Add verisilicon IOMMU driver

[Will Deacon]

On Wed, Aug 27, 2025 at 11:07:59AM +0200, Benjamin Gaignard wrote:
> The Verisilicon IOMMU hardware block can be found in combination
> with Verisilicon hardware video codecs (encoders or decoders) on
> different SoCs.
> Enable it will allow us to use non contiguous memory allocators
> for Verisilicon video codecs.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard at collabora.com>
> ---
> changes in version 8:
> - Add API to restore VSI iommu context from decoder driver
> - Fix reported checkpatch issues: add comment in pinlock_t declaration
>   and remove blank line.
> 
>  drivers/iommu/Kconfig     |  11 +
>  drivers/iommu/Makefile    |   1 +
>  drivers/iommu/vsi-iommu.c | 810 ++++++++++++++++++++++++++++++++++++++
>  include/linux/vsi-iommu.h |  21 +
>  4 files changed, 843 insertions(+)
>  create mode 100644 drivers/iommu/vsi-iommu.c
>  create mode 100644 include/linux/vsi-iommu.h

I still object to the duplication with the rockchip driver:

https://lore.kernel.org/all/aH5yR9CkYSJ4PaZV@willie-the-truck/

at least drop me from cc if you're going to ignore my comments, please.

Will