mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
synced 2026-10-22 19:14:51 +00:00
No description
- C 96.8%
- Assembly 0.9%
- Rust 0.7%
- Shell 0.6%
- Python 0.5%
- Other 0.3%
9e23897bca
DMA transfer faults on Intel hardware when the IOMMU is enabled and driver initialization will fail when attempting to do the first transfer: DMAR: DRHD: handling fault status reg 2 DMAR: [DMA Read NO_PASID] Request device [00:11.0] fault addr 0x676e3000 [fault reason 0x71] SM: Present bit in first-level paging entry is clear i3c mipi-i3c-hci.0: ring 0: Transfer Aborted mipi-i3c-hci mipi-i3c-hci.0: probe with driver mipi-i3c-hci failed with error -62 Reason for this is that the IOMMU setup is done for the physical devices only and not for the virtual I3C Controller device object. Therefore use the pointer to a physical device object with the DMA API. Due to a data corruption observation when the device DMA is IOMMU mapped, a properly sized receive bounce buffer is required if transfer length is not a multiple of DWORDs. Reported-by: Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20250822105630.2820009-4-jarkko.nikula@linux.intel.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> |
History
|
|
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .pylintrc | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.