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authorAndreas Sandberg <Andreas.Sandberg@ARM.com>2013-01-07 13:05:48 -0500
committerAndreas Sandberg <Andreas.Sandberg@ARM.com>2013-01-07 13:05:48 -0500
commite09e9fa279dec86b171b5e3efeb7057fa0d21cc9 (patch)
tree81fe4595ffa298f566a595caa54d5166c9bc09af /tests/configs
parent964aa49d1523787c06491453a85fad511b0a5883 (diff)
downloadgem5-e09e9fa279dec86b171b5e3efeb7057fa0d21cc9.tar.xz
cpu: Flush TLBs on switchOut()
This changeset inserts a TLB flush in BaseCPU::switchOut to prevent stale translations when doing repeated switching. Additionally, the TLB flushing functionality is exported to the Python to make debugging of switching/checkpointing easier. A simulation script will typically use the TLB flushing functionality to generate a reference trace. The following sequence can be used to simulate a handover (this depends on how drain is implemented, but is generally the case) between identically configured CPU models: m5.drain(test_sys) [ cpu.flushTLBs() for cpu in test_sys.cpu ] m5.resume(test_sys) The generated trace should normally be identical to a trace generated when switching between identically configured CPU models or checkpointing and resuming.
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