d9cad2206a
The MI_FLUSH_DW does appear coherent with the following MI_USER_INTERRUPT, but only on Sandybridge. Ivybridge requires a heavier hammer, but on Sandybridge we can stop requiring the irq_seqno barrier. Testcase: igt/gem_sync Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20181228171641.16531-3-chris@chris-wilson.co.uk |
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