[PATCH v7 14/22] dma-mapping: make dma_pgprot() honor __DMA_ATTR_ALLOC_CC_SHARED

[Jason Gunthorpe]

On Wed, Jul 01, 2026 at 11:19:18AM +0530, Aneesh Kumar K.V (Arm) wrote:
> Fold encrypted/decrypted pgprot selection into dma_pgprot() so callers
> do not need to adjust the page protection separately.
> 
> Update dma_pgprot() to apply pgprot_decrypted() when DMA_ATTR_CC_SHARED or
> __DMA_ATTR_ALLOC_CC_SHARED is set and pgprot_encrypted() otherwise Convert
> the dma-direct mmap paths to pass DMA_ATTR_CC_SHARED instead of open-coding
> force_dma_unencrypted() handling around dma_pgprot().
> 
> Tested-by: Jiri Pirko <jiri at nvidia.com>
> Tested-by: Michael Kelley <mhklinux at outlook.com>
> Tested-by: Mostafa Saleh <smostafa at google.com>
> Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar at kernel.org>
> ---
>  kernel/dma/direct.c  |  8 +++-----
>  kernel/dma/mapping.c | 16 ++++++++++++----
>  2 files changed, 15 insertions(+), 9 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>

Jason