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2015-05-01bus: arm-ccn: Provide required event argumentsPawel Moll1-1/+1
Since 688d4dfcdd624192cbf03c08402e444d1d11f294 "perf tools: Support parsing parameterized events" the perf userspace tools understands "argument=?" syntax in the events file, making sure that required arguments are provided by the user and not defaulting to 0, causing confusion. This patch adds the required arguments lists for CCN events. Signed-off-by: Pawel Moll <pawel.moll@arm.com>
2015-05-01bus: arm-ccn: cpumask attributePawel Moll1-6/+9
This patch adds a "cpumask" attribute to CCN's event_source class sysfs directory. Perf user tool uses it to restrict events to the processor(s) enumerated in this mask. This patch provides a single CPU mask, making it possible to run "-a" perf session (previously it would request the same CCN event, for example cycle counter, on each available core and most likely fail). Initially the mask is set to the CPU that happened to probe the driver, but it will be changed when it is hot-un-plugged (active events are migrated to another CPU then). Example: Performance counter stats for 'system wide': CPU0 2968148 cycles CPU1 2236736 cycles CPU2 1797968 cycles CPU3 1831715 cycles CPU1 1201850868 ccn/cycles/ 1.001241383 seconds time elapsed Signed-off-by: Pawel Moll <pawel.moll@arm.com>
2014-07-24bus: ARM CCN PMU driverPawel Moll1-0/+52
Driver providing perf backend for ARM Cache Coherent Network interconnect. Supports counting all hardware events and crosspoint watchpoints. Currently works with CCN-504 only, although there should be no changes required for CCN-508 (just impossible to test it now). Signed-off-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>