drm/xe: Only use reserved BCS instances for usm migrate exec queue

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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: a043fbab7a ("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: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240415190453.696553-2-matthew.brost@intel.com
Reviewed-by: Brian Welty <brian.welty@intel.com>

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This commit is contained in:

Matthew Brost 2024-04-15 12:04:53 -07:00

parent 4c0be90e68

commit 04f4a70a18

1 changed files with 5 additions and 7 deletions

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drivers/gpu/drm/xe/xe_migrate.c

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