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Tsirkin" , Miguel Ojeda , Robin Murphy , rust-for-linux@vger.kernel.org, Sagi Grimberg , Stefano Stabellini , Steven Rostedt , virtualization@lists.linux.dev, Will Deacon , xen-devel@lists.xenproject.org Subject: [PATCH v1 00/16] dma-mapping: migrate to physical address-based API Date: Mon, 4 Aug 2025 15:42:34 +0300 Message-ID: X-Mailer: git-send-email 2.50.1 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Changelog: v1: * Added new DMA_ATTR_MMIO attribute to indicate PCI_P2PDMA_MAP_THRU_HOST_BRIDGE path. * Rewrote dma_map_* functions to use thus new attribute v0: https://lore.kernel.org/all/cover.1750854543.git.leon@kernel.org/ ------------------------------------------------------------------------ This series refactors the DMA mapping to use physical addresses as the primary interface instead of page+offset parameters. This change aligns the DMA API with the underlying hardware reality where DMA operations work with physical addresses, not page structures. The series maintains export symbol backward compatibility by keeping the old page-based API as wrapper functions around the new physical address-based implementations. Thanks Leon Romanovsky (16): dma-mapping: introduce new DMA attribute to indicate MMIO memory iommu/dma: handle MMIO path in dma_iova_link dma-debug: refactor to use physical addresses for page mapping dma-mapping: rename trace_dma_*map_page to trace_dma_*map_phys iommu/dma: rename iommu_dma_*map_page to iommu_dma_*map_phys iommu/dma: extend iommu_dma_*map_phys API to handle MMIO memory dma-mapping: convert dma_direct_*map_page to be phys_addr_t based kmsan: convert kmsan_handle_dma to use physical addresses dma-mapping: handle MMIO flow in dma_map|unmap_page xen: swiotlb: Open code map_resource callback dma-mapping: export new dma_*map_phys() interface mm/hmm: migrate to physical address-based DMA mapping API mm/hmm: properly take MMIO path block-dma: migrate to dma_map_phys instead of map_page block-dma: properly take MMIO path nvme-pci: unmap MMIO pages with appropriate interface Documentation/core-api/dma-api.rst | 4 +- Documentation/core-api/dma-attributes.rst | 7 ++ arch/powerpc/kernel/dma-iommu.c | 4 +- block/blk-mq-dma.c | 15 ++- drivers/iommu/dma-iommu.c | 69 +++++++------ drivers/nvme/host/pci.c | 18 +++- drivers/virtio/virtio_ring.c | 4 +- drivers/xen/swiotlb-xen.c | 21 +++- include/linux/blk-mq-dma.h | 6 +- include/linux/blk_types.h | 2 + include/linux/dma-direct.h | 2 - include/linux/dma-map-ops.h | 8 +- include/linux/dma-mapping.h | 27 +++++ include/linux/iommu-dma.h | 11 +-- include/linux/kmsan.h | 12 ++- include/trace/events/dma.h | 9 +- kernel/dma/debug.c | 71 ++++--------- kernel/dma/debug.h | 37 ++----- kernel/dma/direct.c | 22 +---- kernel/dma/direct.h | 50 ++++++---- kernel/dma/mapping.c | 115 +++++++++++++--------- kernel/dma/ops_helpers.c | 6 +- mm/hmm.c | 19 ++-- mm/kmsan/hooks.c | 36 +++++-- rust/kernel/dma.rs | 3 + tools/virtio/linux/kmsan.h | 2 +- 26 files changed, 320 insertions(+), 260 deletions(-) -- 2.50.1