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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-02 13:17:06 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-03 11:26:01 +0000 |
| commit | fb218f2027048e199a76cccb9a131b2afd48ccbe (patch) | |
| tree | 0e2160ccd40f9f731d560d2f6637aa763ac59e26 /drivers/gpu/drm/i915/gt/intel_engine_pm.c | |
| parent | drm/i915/gt: Ignore stale context state upon resume (diff) | |
| download | linux-dev-fb218f2027048e199a76cccb9a131b2afd48ccbe.tar.xz linux-dev-fb218f2027048e199a76cccb9a131b2afd48ccbe.zip | |
drm/i915/gt: Discard stale context state from across idling
Before we idle, on parking, we switch to the kernel context such that we
have a scratch context loaded while the GPU idle, protecting any
precious user state. Be paranoid and assume that the idle state may have
been trashed, and reset the kernel_context image after idling.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Imre Deak <imre.deak@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200102131707.1463945-4-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_engine_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_pm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c index cd82f0baef49..1b9f73948f22 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c @@ -20,6 +20,7 @@ static int __engine_unpark(struct intel_wakeref *wf) { struct intel_engine_cs *engine = container_of(wf, typeof(*engine), wakeref); + struct intel_context *ce; void *map; ENGINE_TRACE(engine, "\n"); @@ -34,6 +35,11 @@ static int __engine_unpark(struct intel_wakeref *wf) if (!IS_ERR_OR_NULL(map)) engine->pinned_default_state = map; + /* Discard stale context state from across idling */ + ce = engine->kernel_context; + if (ce) + ce->ops->reset(ce); + if (engine->unpark) engine->unpark(engine); |