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Using the HWSP ggtt_offset to get the lrca offset is only correct if the HWSP happens to be before it (when we reuse the PPHWSP of the kernel context as the engine HWSP). Instead of making this assumption, get the lrca offset from the kernel_context engine state. And while looking at this part of the GuC interaction, it was also noticed that the firmware expects the size of only the engine context (context minus the execlist part, i.e. don't include the first 80 dwords), so pass the right size. v2: Use the new macros to prevent abusive overuse of the old ones (Chris). Reported-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Signed-off-by: Michel Thierry <michel.thierry@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Oscar Mateo <oscar.mateo@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170712193032.27080-2-michel.thierry@intel.com Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Acked-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20170913085605.18299-2-chris@chris-wilson.co.uk |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.