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fa0d2dc69e
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
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.