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Tejas Upadhyay fd25fa90ed drm/xe: Dont skip TLB invalidations on VF
Skipping TLB invalidations on VF causing unrecoverable
faults. Probable reason for skipping TLB invalidations
on SRIOV could be lack of support for instruction
MI_FLUSH_DW_STORE_INDEX. Add back TLB flush with some
additional handling.

Helps in resolving,
[  704.913454] xe 0000:00:02.1: [drm:pf_queue_work_func [xe]]
                ASID: 0
                VFID: 0
                PDATA: 0x0d92
                Faulted Address: 0x0000000002fa0000
                FaultType: 0
                AccessType: 1
                FaultLevel: 0
                EngineClass: 3 bcs
                EngineInstance: 8
[  704.913551] xe 0000:00:02.1: [drm:pf_queue_work_func [xe]] Fault response: Unsuccessful -22

V2:
 - Use Xmas tree (MichalW)

Suggested-by: Matthew Brost <matthew.brost@intel.com>
Fixes: 97515d0b3e ("drm/xe/vf: Don't emit access to Global HWSP if VF")
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250710045945.1023840-1-tejas.upadhyay@intel.com
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
(cherry picked from commit b528e896fa)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
History 2025-07-17 09:45:19 -03:00
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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.