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2f43193b88
linux/kernel/dma
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Linus Torvalds 2f43193b88 dma-mapping updates for Linux 7.3: 
- swiotlb: added new configuration option for the default pool size
 (Jagadeesh Pagadala) and reduced overhead for high watermark tracking
 (chenhuguanshen)
 
 - minor code cleanups and improvements (Vova Sharaienko, Honglei Huang
 and Marek Szyprowski)
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mergetag object 04a19b35dc
 type commit
 tag dma-mapping-7.3-2026-08-24-2
 tagger Marek Szyprowski <m.szyprowski@samsung.com> 1787582472 +0200
 
 second dma-mapping update for Linux 7.3:
 
 - important dma-mapping update for confidential-computing, which adds
 proper tracking of the shared DMA state through direct, pool and swiotlb
 paths (Aneesh Kumar K.V)
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Merge tags 'dma-mapping-7.3-2026-08-24' and 'dma-mapping-7.3-2026-08-24-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux

Pull dma-mapping updates from Marek Szyprowski:

 - swiotlb:
     - new configuration option for the default pool size
       (Jagadeesh Pagadala)
     - reduce overhead for high watermark tracking (chenhuguanshen)

 - minor code cleanups and improvements (Vova Sharaienko, Honglei Huang
   and Marek Szyprowski)

 - add proper tracking of the shared DMA state through direct, pool and
   swiotlb paths (Aneesh Kumar K.V)

   This is important for confidential-computing

* tag 'dma-mapping-7.3-2026-08-24' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux:
  dma/swiotlb: decouple high watermark tracking from CONFIG_DEBUG_FS
  MAINTAINERS: update tree for DMA MAPPING HELPERS
  dma/swiotlb: introduce Kconfig option for compile-time default pool size
  dma-direct: Improve readability of the dma_direct_map_sg() for P2PDMA case
  iommu/dma: simplify dma_iova_destroy() and drop the free_iova helper
  dma-coherent: use KiB in DMA allocation logs
  dma-coherent: fix spacing coding style issue

* tag 'dma-mapping-7.3-2026-08-24-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux: (23 commits)
  swiotlb: remove unused SWIOTLB_FORCE flag
  dma: swiotlb: handle set_memory_decrypted() failures
  dma: swiotlb: free dynamic pools from process context
  dma-direct: rename ret to cpu_addr in alloc helpers
  dma-direct: select DMA address encoding from __DMA_ATTR_ALLOC_CC_SHARED
  dma-direct: set decrypted flag for remapped DMA allocations
  dma-direct: make dma_direct_map_phys() honor DMA_ATTR_CC_SHARED
  dma-direct: Move dma_direct_map_phys() to dma/direct.c
  dma-direct: pass attrs to dma_capable() for DMA_ATTR_CC_SHARED checks
  dma-mapping: make dma_pgprot() honor __DMA_ATTR_ALLOC_CC_SHARED
  dma: swiotlb: track pool encryption state and honor DMA_ATTR_CC_SHARED
  dma: swiotlb: pass mapping attributes by reference
  dma-pool: track decrypted atomic pools and select them via attrs
  dma-direct: use __DMA_ATTR_ALLOC_CC_SHARED in alloc/free paths
  dma-mapping: Add internal shared allocation attribute
  coco: arm64: s390: powerpc: Mark secure guests with CC_ATTR_GUEST_MEM_ENCRYPT
  dma-direct: swiotlb: handle swiotlb alloc/free outside __dma_direct_alloc_pages
  s390: Expose protected virtualization through cc_platform_has()
  swiotlb: Preserve allocation virtual address for dynamic pools
  dma: free atomic pool pages by physical address
  ...
2026-08-24 11:35:46 -07:00
..
coherent.c dma-mapping updates for Linux 7.3: 2026-08-24 11:35:46 -07:00
contiguous.c dma-contiguous: simplify numa cma area handling 2026-05-28 10:11:45 +02:00
debug.c dma-mapping updates for Linux 7.2: 2026-06-17 12:20:21 -07:00
debug.h dma-debug: Feed DMA attribute for unmapping flows too 2026-05-08 22:28:19 +02:00
direct.c dma-mapping updates for Linux 7.3: 2026-08-24 11:35:46 -07:00
direct.h dma-direct: Move dma_direct_map_phys() to dma/direct.c 2026-07-31 08:40:59 +02:00
dummy.c dma-mapping: convert dummy ops to physical address mapping 2025-10-29 10:27:29 +01:00
Kconfig dma/swiotlb: introduce Kconfig option for compile-time default pool size 2026-07-17 09:15:38 +02:00
Makefile dma-mapping: clearly mark DMA ops as an architecture feature 2024-09-04 07:08:51 +03:00
map_benchmark.c dma: map_benchmark: turn dma_sg_map_param buf into a flexible array 2026-06-03 08:20:02 +02:00
mapping.c dma-mapping updates for Linux 7.3: 2026-08-24 11:35:46 -07:00
ops_helpers.c mm: prefer vma_[start,end]_pgoff() to vma->vm_pgoff in kernel/ 2026-08-04 19:19:01 -07:00
pool.c dma-pool: track decrypted atomic pools and select them via attrs 2026-07-31 08:40:58 +02:00
remap.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
swiotlb.c dma-mapping updates for Linux 7.3: 2026-08-24 11:35:46 -07:00