[PATCH v2 08/10] iommu/arm-smmu-v3: Shrink the cdtab l1_desc array

[Nicolin Chen]

On Mon, Jun 10, 2024 at 09:31:17PM -0300, Jason Gunthorpe wrote:
> The top of the 2 level CD table is (at most) 1024 entries big, and two
> high order allocations are required. One of __le64 which is programmed
> into the HW (8k) and one of struct arm_smmu_l1_ctx_desc which holds the
> CPU pointer (16k).
> 
> There are two copies of the l2ptr_dma, one is stored in the struct
> arm_smmu_l1_ctx_desc, and another is encoded in the __le64 for the HW to
> use. Instead of storing two copies just decode the value from the __le64.
> 
> Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>

Reviewed-by: Nicolin Chen <nicolinc at nvidia.com>