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0a2a873d61
Gfx device reports two classes of errors: uncorrectable and correctable. Depending on the severity uncorrectable errors are further classified Non-Fatal and Fatal. Correctable and Non-Fatal errors: These errors are reported as MSI. Bits in the Master Interrupt Register indicate the class of the error. The source of the error is then read from the Device Error Source Register. Fatal errors: These are reported as PCIe errors When a PCIe error is asserted, the OS will perform a SBR (Secondary Bus reset) which causes the driver to reload. The error registers are sticky and the values are maintained through SBR. Add basic support to handle these errors. Bspec: 50875, 53073, 53074, 53075, 53076 v2: Format commit message (Umesh) v3: fix documentation (Stuart) Cc: Stuart Summers <stuart.summers@intel.com> Co-developed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com> Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com> Signed-off-by: Riana Tauro <riana.tauro@intel.com> Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com> Link: https://lore.kernel.org/r/20250826063419.3022216-9-riana.tauro@intel.com Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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.