mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-02 05:07:46 -04:00
f4ecfbfc32
Add a selftest to ensure that we restore the whitelisted registers after rewrite the registers everytime they might be scrubbed, e.g. module load, reset and resume. For the other volatile workaround registers, we export their presence via debugfs and check in igt/gem_workarounds. However, we don't export the whitelist and rather than do so, let's test them directly in the kernel. The test we use is to read the registers back from the CS (this helps us be sure that the registers will be valid for MI_LRI etc). In order to generate the expected list, we split intel_whitelist_workarounds_emit into two phases, the first to build the list and the second to apply. Inside the test, we only build the list and then check that list against the hw. v2: Filter out pre-gen8 as they do not have RING_NONPRIV. v3: Drop unused engine parameter, no plans to use it now or future. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Oscar Mateo <oscar.mateo@intel.com> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Reviewed-by: Oscar Mateo <oscar.mateo@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180414122754.569-1-chris@chris-wilson.co.uk
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.