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authorAaron Durbin <adurbin@chromium.org>2014-02-08 15:41:52 -0600
committerAaron Durbin <adurbin@google.com>2014-02-09 22:08:53 +0100
commitca4f4b8c9eef77fbcad0af3b21885a337a1f2c83 (patch)
treed6d185b7a25c9a1f8c0e6105f34178cb0658ba71 /documentation/RFC
parent892728c65fcd82cab43e334396b86fc257ecf256 (diff)
mtrr: only add prefetchable resources as WRCOMB for VGA devices
Be more conservative and only add VGA devices' prefetchable resources as write-combining in the address space. Previously all prefetchable memory was added as a write-combining memory type. Some hardware incorrectly advertises its BAR as prefetchable when it shouldn't be. A new memranges_add_resources_filter() function is added to provide additional filtering on device and resource. Change-Id: I3fc55b90d8c5b694c5aa9e2f34db1b4ef845ce10 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/5169 Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com> Tested-by: build bot (Jenkins)
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