Changes from v8: * Probe PMU version based on ID_DFR0 * pmccntr_read() now returns 64bit and can handle both 32bit and 64bit PMCCNTR based on PMU version. * Add pmccntr_write() support * Use a common printf format PRId64 to support 64bit variable smoothly in test functions * Add barriers to several PMU write functions * Verfied on different execution modes
Note: 1) Current KVM code has bugs in handling PMCCFILTR write. A fix (see below) is required for this unit testing code to work correctly under KVM mode. https://lists.cs.columbia.edu/pipermail/kvmarm/2016-November/022134.html. Thanks, -Wei Wei Huang (3): arm: Add PMU test arm: pmu: Check cycle count increases arm: pmu: Add CPI checking arm/Makefile.common | 3 +- arm/pmu.c | 339 ++++++++++++++++++++++++++++++++++++++++++++++++++++ arm/unittests.cfg | 19 +++ 3 files changed, 360 insertions(+), 1 deletion(-) create mode 100644 arm/pmu.c -- 1.8.3.1
