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authorAli Saidi <Ali.Saidi@ARM.com>2013-01-07 13:05:33 -0500
committerAli Saidi <Ali.Saidi@ARM.com>2013-01-07 13:05:33 -0500
commit69d419f31383ac7801e1debb62d5bbf7cb899e3c (patch)
tree8081815bc613db0126c785f0b14a6ade6a651ad1 /src/cpu/legiontrace.hh
parent5146a69835bc9ba37fba7d3b0ff72ecaf9b98b74 (diff)
downloadgem5-69d419f31383ac7801e1debb62d5bbf7cb899e3c.tar.xz
o3: Fix issue with LLSC ordering and speculation
This patch unlocks the cpu-local monitor when the CPU sees a snoop to a locked address. Previously we relied on the cache to handle the locking for us, however some users on the gem5 mailing list reported a case where the cpu speculatively executes a ll operation after a pending sc operation in the pipeline and that makes the cache monitor valid. This should handle that case by invaliding the local monitor.
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