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drm/i915/bdw: The TLB invalidation mechanism has been removed from INSTPM
authorDamien Lespiau <damien.lespiau@intel.com>
Thu, 13 Mar 2014 01:40:28 +0000 (01:40 +0000)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 13 Mar 2014 02:52:31 +0000 (03:52 +0100)
commitdc616b89dbc4bb6a99884d214bd1ed1e0eef59a0
tree18a0547a3e6b620cb308b58ca7137f436baca1b8tree | snapshot
parent065f2ec2afc850960dcebc3b00766bc31c4ffd3bcommit | diff
drm/i915/bdw: The TLB invalidation mechanism has been removed from INSTPM

While wandering in the spec, I noticed that BDW removes those 2 bits
from INSTPM. I couldn't find any direct way to invalidate the TLB (ie
without the ring working already). Maybe someone will be more lucky.

At least, we now know we may be a problem.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_ringbuffer.c diff | blob | history
Domain: System / Kernel;