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authorMichael Ellerman <michael@ellerman.id.au>2013-06-28 04:15:16 -0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-06-30 21:50:10 -0400
commit330a1eb7775ba876dbd46b9885556e57f705e3d4 (patch)
tree138693772ff043ec23e335a1ef42df7a7d5707ba /Documentation/serial/README.cycladesZ
parent2ac138ca21ad26c988ce7c91d27327f85beb7519 (diff)
powerpc/perf: Core EBB support for 64-bit book3s
Add support for EBB (Event Based Branches) on 64-bit book3s. See the included documentation for more details. EBBs are a feature which allows the hardware to branch directly to a specified user space address when a PMU event overflows. This can be used by programs for self-monitoring with no kernel involvement in the inner loop. Most of the logic is in the generic book3s code, primarily to avoid a proliferation of PMU callbacks. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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