drm/i915/execlists: Disable preemption under GVT

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Preempt-to-busy uses a GPU semaphore to enforce an idle-barrier across
preemption, but mediated gvt does not fully support semaphores.

v2: Fiddle around with the flags and settle on using has-semaphores for
the core bits so that we retain the ability to preempt our own
semaphores.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Xiaolin Zhang <xiaolin.zhang@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Acked-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190709091233.8573-1-chris@chris-wilson.co.uk

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This commit is contained in:

Chris Wilson 2019-07-09 10:12:33 +01:00

parent cfe7288c27

commit 09975b861a

3 changed files with 26 additions and 8 deletions

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4

drivers/gpu/drm/i915/gt/intel_engine_cs.c

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24

drivers/gpu/drm/i915/gt/intel_lrc.c

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6

drivers/gpu/drm/i915/gt/selftest_lrc.c

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