[GIT PULL] dma-mapping updates for Linux 7.1

[Marek Szyprowski]

The following changes since commit 2cdaff22ed26f1e619aa2b43f27bb84f2c6ef8f8:

  dma-mapping: add missing `inline` for `dma_free_attrs` (2026-03-25 08:01:21 +0100)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux.git tags/dma-mapping-7.1-2026-04-16

for you to fetch changes up to 15818b2cd42df3cc886f4cc46acfab4d072dcacc:

  dma-buf: heaps: system: document system_cc_shared heap (2026-04-10 14:20:01 +0200)

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dma-mapping updates for Linux 7.0:

- added support for batched cache sync, what improves performance of
  dma_map/unmap_sg() operations on ARM64 architecture (Barry Song)

- introduced DMA_ATTR_CC_SHARED attribute for explicitly shared memory
  used in confidential computing (Jiri Pirko)

- refactored spaghetti-like code in drivers/of/of_reserved_mem.c and its
  clients (Marek Szyprowski, shared branch with device-tree updates to
  avoid merge conflicts)

- prepared Contiguous Memory Allocator related code for making dma-buf
  drivers modularized (Maxime Ripard)

- added support for benchmarking dma_map_sg() calls to tools/dma utility
  (Qinxin Xia)

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Barry Song (5):
      arm64: Provide dcache_by_myline_op_nosync helper
      arm64: Provide dcache_clean_poc_nosync helper
      arm64: Provide dcache_inval_poc_nosync helper
      dma-mapping: Separate DMA sync issuing and completion waiting
      dma-mapping: Support batch mode for dma_direct_{map,unmap}_sg

Jiri Pirko (3):
      dma-mapping: introduce DMA_ATTR_CC_SHARED for shared memory
      dma-buf: heaps: system: add system_cc_shared heap for explicitly shared memory
      dma-buf: heaps: system: document system_cc_shared heap

Kit Dallege (1):
      dma-mapping: fix false kernel-doc comment marker

Marek Szyprowski (10):
      Merge tag 'dma-mapping-7.0-2026-03-25' into dma-mapping-for-next
      of: reserved_mem: remove fdt node from the structure
      of: reserved_mem: use -ENODEV instead of -ENOENT
      of: reserved_mem: switch to ops based OF_DECLARE()
      of: reserved_mem: replace CMA quirks by generic methods
      of: reserved_mem: rearrange code a bit
      of: reserved_mem: clarify fdt_scan_reserved_mem*() functions
      of: reserved_mem: rework fdt_init_reserved_mem_node()
      Merge branch 'dt-reserved-mem-cleanups' into dma-mapping-for-next
      Merge branch 'dma-contig-for-7.1-modules-prep-v4' into dma-mapping-for-next

Maxime Ripard (5):
      dma: contiguous: Turn heap registration logic around
      dma: contiguous: Make dev_get_cma_area() a proper function
      dma: contiguous: Make dma_contiguous_default_area static
      dma: contiguous: Export dev_get_cma_area()
      mm: cma: Export cma_alloc(), cma_release() and cma_get_name()

Qinxin Xia (3):
      dma-mapping: benchmark: modify the framework to adapt to more map modes
      dma-mapping: benchmark: add support for dma_map_sg
      tools/dma: Add dma_map_sg support

 Documentation/userspace-api/dma-buf-heaps.rst |   7 +
 arch/arm64/Kconfig                            |   1 +
 arch/arm64/include/asm/assembler.h            |  25 +-
 arch/arm64/include/asm/cache.h                |   5 +
 arch/arm64/include/asm/cacheflush.h           |   2 +
 arch/arm64/kernel/relocate_kernel.S           |   3 +-
 arch/arm64/mm/cache.S                         |  57 ++++-
 arch/arm64/mm/dma-mapping.c                   |   4 +-
 drivers/dma-buf/heaps/cma_heap.c              |  19 +-
 drivers/dma-buf/heaps/system_heap.c           | 103 ++++++++-
 drivers/iommu/dma-iommu.c                     |  35 ++-
 drivers/memory/tegra/tegra210-emc-table.c     |  19 +-
 drivers/of/fdt.c                              |   2 +-
 drivers/of/of_private.h                       |   2 +-
 drivers/of/of_reserved_mem.c                  | 320 +++++++++++++++-----------
 drivers/xen/swiotlb-xen.c                     |  24 +-
 include/linux/cma.h                           |  10 -
 include/linux/dma-buf/heaps/cma.h             |  16 --
 include/linux/dma-map-ops.h                   |  23 +-
 include/linux/dma-mapping.h                   |  12 +-
 include/linux/of_reserved_mem.h               |  16 +-
 include/trace/events/dma.h                    |   3 +-
 include/uapi/linux/map_benchmark.h            |  13 +-
 kernel/dma/Kconfig                            |   3 +
 kernel/dma/coherent.c                         |  19 +-
 kernel/dma/contiguous.c                       | 144 +++++++++---
 kernel/dma/direct.c                           |  23 +-
 kernel/dma/direct.h                           |  35 ++-
 kernel/dma/map_benchmark.c                    | 246 ++++++++++++++++++--
 kernel/dma/mapping.c                          |  19 +-
 kernel/dma/swiotlb.c                          |  26 ++-
 mm/cma.c                                      |   3 +
 tools/dma/dma_map_benchmark.c                 |  23 +-
 33 files changed, 917 insertions(+), 345 deletions(-)
 delete mode 100644 include/linux/dma-buf/heaps/cma.h

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Thanks!

Best regards
Marek Szyprowski, PhD
Samsung R&D Institute Poland