mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-09 16:07:17 -04:00
6fc7020cf2
Current Intel IOMMU driver sets the system level dma_ops. This causes each dma API to go through the IOMMU driver even the devices are using identity mapped domains. This sets per-device dma_ops only if a device is using a DMA domain. Otherwise, use the default system level dma_ops for direct dma. Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Tested-by: Daniel Drake <drake@endlessm.com> Reviewed-by: Jon Derrick <jonathan.derrick@intel.com> Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com> Link: https://lore.kernel.org/r/20200506015947.28662-4-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
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 Restructured Text 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.