Shanker Donthineni 9a0b5fdce1 dma/pool: Ensure DMA_DIRECT_REMAP allocations are decrypted ... commit 89a2d212bdb4bc29bed8e7077abe054b801137ea upstream. When CONFIG_DMA_DIRECT_REMAP is enabled, atomic pool pages are remapped via dma_common_contiguous_remap() using the supplied pgprot. Currently, the mapping uses pgprot_dmacoherent(PAGE_KERNEL), which leaves the memory encrypted on systems with memory encryption enabled (e.g., ARM CCA Realms). This can cause the DMA layer to fail or crash when accessing the memory, as the underlying physical pages are not configured as expected. Fix this by requesting a decrypted mapping in the vmap() call: pgprot_decrypted(pgprot_dmacoherent(PAGE_KERNEL)) This ensures that atomic pool memory is consistently mapped unencrypted. Cc: stable@vger.kernel.org Signed-off-by: Shanker Donthineni <sdonthineni@nvidia.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Link: https://lore.kernel.org/r/20250811181759.998805-1-sdonthineni@nvidia.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-09-04 14:28:47 +02:00
..
coherent.c	dma-mapping: clear dev->dma_mem to NULL after freeing it	2024-01-25 14:52:38 -08:00
contiguous.c	dma/contiguous: avoid warning about unused size_bytes	2025-05-02 07:44:29 +02:00
debug.c	dma-debug: fix a possible deadlock on radix_lock	2024-12-14 19:51:38 +01:00
debug.h
direct.c
direct.h
dummy.c
Kconfig
Makefile
map_benchmark.c	dma-mapping: benchmark: Don't starve others when doing the test	2024-09-12 11:07:48 +02:00
mapping.c	dma: fix call order in dmam_free_coherent	2024-08-19 05:45:23 +02:00
ops_helpers.c
pool.c	dma/pool: Ensure DMA_DIRECT_REMAP allocations are decrypted	2025-09-04 14:28:47 +02:00
remap.c
swiotlb.c	memblock: drop memblock_free_early_nid() and memblock_free_early()	2025-03-13 12:50:07 +01:00