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drm/i915/gt: Always force restore freshly pinned contexts

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It is highly unlikely, but still conceivable, that we submit a context
with the same GGTT address as last active on the HW. In this case, with
a matching LRCA, the HW would not restore the new context image causing
a potential violation of our context isolation.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200107172842.3315449-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2020-01-07 17:28:42 +00:00
parent 2c86e55d2a
commit d7cb6975f1
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/gt/intel_lrc.c
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@ -2583,7 +2583,7 @@ __execlists_context_pin(struct intel_context *ce,
goto unpin_active;
}
ce->lrc_desc = lrc_descriptor(ce, engine);
ce->lrc_desc = lrc_descriptor(ce, engine) | CTX_DESC_FORCE_RESTORE;
ce->lrc_reg_state = vaddr + LRC_STATE_PN * PAGE_SIZE;
__execlists_update_reg_state(ce, engine);