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authorJens Axboe <axboe@kernel.dk>2025-11-14 15:10:09 +0300
committerJens Axboe <axboe@kernel.dk>2025-11-14 15:10:09 +0300
commitfa0d2dc69e945ddbb1d023dfb4f7ba4103523213 (patch)
tree4512b28a5e01e2d581381a7f75fce083be3e906b /scripts/patch-kernel
parent8e1bf774ab18157cb8041628f2661aa12e425914 (diff)
parent37f0c7a8df7ad719a68fa1c2dbf066cfebc391a7 (diff)
downloadlinux-fa0d2dc69e945ddbb1d023dfb4f7ba4103523213.tar.xz
Merge branch 'p2pdma-mmio-6.19.v5' into for-6.19/block
Merge MMIO P2P DMA series from Leon: "This patch series improves block layer and NVMe driver support for MMIO memory regions, particularly for peer-to-peer (P2P) DMA transfers that go through the host bridge. The series addresses a critical gap where P2P transfers through the host bridge (PCI_P2PDMA_MAP_THRU_HOST_BRIDGE) were not properly marked as MMIO memory, leading to potential issues with: - Inappropriate CPU cache synchronization operations on MMIO regions - Incorrect DMA mapping/unmapping that doesn't respect MMIO semantics - Missing IOMMU configuration for MMIO memory handling This work is extracted from the larger DMA physical API improvement series [1] and focuses specifically on block layer and NVMe requirements for MMIO memory support. [1] https://lore.kernel.org/all/cover.1757423202.git.leonro@nvidia.com/" Link: https://lore.kernel.org/linux-block/20251114-block-with-mmio-v5-0-69d00f73d766@nvidia.com/ Signed-off-by: Jens Axboe <axboe@kernel.dk> * p2pdma-mmio-6.19.v5: block-dma: properly take MMIO path nvme-pci: migrate to dma_map_phys instead of map_page
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