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520d05a77b
commitef99a60ffdupstream. Since we do a bare context switch with no restore, the clear residual kernel runs on dirty state, and we must be careful to avoid executing with bad state from context registers inherited from a malicious client. Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2955 Fixes:09aa9e4586("drm/i915/gt: Restore clear-residual mitigations for Ivybridge, Baytrail") Testcase: igt/gem_ctx_isolation # ivb,vlv Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Cc: Akeem G Abodunrin <akeem.g.abodunrin@intel.com> Reviewed-by: Akeem G Abodunrin <akeem.g.abodunrin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210117093015.29143-1-chris@chris-wilson.co.uk (cherry picked from commitace44e13e5) Signed-off-by: Jani Nikula <jani.nikula@intel.com> 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.