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authorChris Wilson2020-07-14 12:44:19 +0100
committerChris Wilson2020-07-15 10:18:29 +0100
commit2a19abb006292d741e670ea6be804c3a575676ce (patch)
tree7eb87c05293a6c25a4639e44024f83fc7dd85343 /drivers/gpu/drm/i915
parentd45171ac186d0d264f6f3b5c345d5f855db8c8aa (diff)
drm/i915/gt: Assert the kernel context is using the HWSP
We need to ensure that the kernel context is using the permanently pinned HWSP so that we can always submit a pm request from any context. By construction, the engine->kernel_context should only be using the engine->status_page.vma so let's assert that is still true when we have to submit a request for parking the engine. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200714114419.28713-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915')
-rw-r--r--drivers/gpu/drm/i915/gt/intel_engine_pm.c1
1 files changed, 1 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 d0a1078ef632..8ec3eecf3e39 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
@@ -142,6 +142,7 @@ static bool switch_to_kernel_context(struct intel_engine_cs *engine)
return true;
GEM_BUG_ON(!intel_context_is_barrier(ce));
+ GEM_BUG_ON(ce->timeline->hwsp_ggtt != engine->status_page.vma);
/* Already inside the kernel context, safe to power down. */
if (engine->wakeref_serial == engine->serial)