This series implements tests exercising the PMUv3 event counters. It tests both the 32-bit and 64-bit versions. Overflow interrupts also are checked. Those tests only are written for arm64. It allowed to reveal some issues related to SW_INCR implementation (esp. related to 64-bit implementation), some problems related to 32-bit <-> 64-bit transitions and consistency of enabled states of odd and event counters. Fixes now are upstream. Drew kindly provided "arm64: Provide read/write_sysreg_s". All PMU tests can be launched with: ./run_tests.sh -g pmu Tests also can be launched individually. For example: ./arm-run arm/pmu.flat -append 'pmu-chained-sw-incr' With KVM: - On TX2, I have some random failures due to MEM_ACCESS event measured with a great disparity. This is not observed on other machines I have access to. The series can be found at: https://github.com/eauger/kut/tree/pmu_event_counters_v3 History: v2 -> v3: - Took into account numerous comments from Drew - Applied Andre's R-b when code has not changed too much - Don't check PMCR.IMP anymore - better handling of version - put simple SW_INCR tests for easier TCG testing v1 -> v2: - Took into account Andre's comments except I did not use cnbz in the mem_access_loop() and I did not use @loop directly. Those changes had side effects I cannot explain on the tests. Anyway I think this can be improved later on. - removed [kvm-unit-tests PATCH 09/10] arm/arm64: gic: Introduce setup_irq() helper RFC -> v1: - Use new report() proto - Style cleanup - do not warn about ARM spec recommendations - add a comment about PMCEID0/1 splits Andrew Jones (1): arm64: Provide read/write_sysreg_s Eric Auger (11): arm: pmu: Let pmu tests take a sub-test parameter arm: pmu: Don't check PMCR.IMP anymore arm: pmu: Add a pmu struct arm: pmu: Introduce defines for PMU versions arm: pmu: Check Required Event Support arm: pmu: Basic event counter Tests arm: pmu: Test SW_INCR event count arm: pmu: Test chained counters arm: pmu: test 32-bit <-> 64-bit transitions arm: gic: Introduce gic_irq_set_clr_enable() helper arm: pmu: Test overflow interrupts arm/pmu.c | 839 +++++++++++++++++++++++++++++++++++++++-- arm/unittests.cfg | 61 ++- lib/arm/asm/gic.h | 4 + lib/arm/gic.c | 31 ++ lib/arm64/asm/sysreg.h | 17 + lib/bitops.h | 3 + 6 files changed, 918 insertions(+), 37 deletions(-) -- 2.20.1
