mirror of
https://github.com/raspberrypi/linux.git
synced 2025-12-27 12:32:50 +00:00
052d0e79ef
commit7fc961cf7fupstream. SRS cap is the hardware cap telling if the hardware IOMMU can support requests seeking supervisor privilege or not. SRE bit in scalable-mode PASID table entry is treated as Reserved(0) for implementation not supporting SRS cap. Checking SRS cap before setting SRE bit can avoid the non-recoverable fault of "Non-zero reserved field set in PASID Table Entry" caused by setting SRE bit while there is no SRS cap support. The fault messages look like below: DMAR: DRHD: handling fault status reg 2 DMAR: [DMA Read NO_PASID] Request device [00:0d.0] fault addr 0x1154e1000 [fault reason 0x5a] SM: Non-zero reserved field set in PASID Table Entry Fixes:6f7db75e1c("iommu/vt-d: Add second level page table interface") Cc: stable@vger.kernel.org Signed-off-by: Tina Zhang <tina.zhang@intel.com> Link: https://lore.kernel.org/r/20221115070346.1112273-1-tina.zhang@intel.com Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20221116051544.26540-3-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.