a2db319211
Checking seqno_recv >= seqno looks like it will incorrectly report true when the seqno has wrapped (not unlikely given TLB_INVALIDATION_SEQNO_MAX). Calling xe_gt_tlb_invalidation_wait() might then return before the flush has been completed by the GuC. Fix this by treating a large negative delta as an indication that the seqno has wrapped around. Similar to how we treat a large positive delta as an indication that the seqno_recv must have wrapped around, but in that case the seqno has likely also signalled. It looks like we could also potentially make the seqno use the full 32bits as supported by the GuC. Signed-off-by: Matthew Auld <matthew.auld@intel.com> Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com> Cc: Matthew Brost <matthew.brost@intel.com> Reviewed-by: Matthew Brost <matthew.brost@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 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.