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Commit c8ea2c31 authored by Matthew Brost's avatar Matthew Brost Committed by Thomas Hellström
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drm/xe: Only use reserved BCS instances for usm migrate exec queue



The GuC context scheduling queue is 2 entires deep, thus it is possible
for a migration job to be stuck behind a fault if migration exec queue
shares engines with user jobs. This can deadlock as the migrate exec
queue is required to service page faults. Avoid deadlock by only using
reserved BCS instances for usm migrate exec queue.

Fixes: a043fbab ("drm/xe/pvc: Use fast copy engines as migrate engine on PVC")
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Signed-off-by: default avatarMatthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415190453.696553-2-matthew.brost@intel.com


Reviewed-by: default avatarBrian Welty <brian.welty@intel.com>
(cherry picked from commit 04f4a70a)
Signed-off-by: default avatarThomas Hellström <thomas.hellstrom@linux.intel.com>
parent 77b79df0
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