The ARM PMU implementation currently contains a basic cycle counter, but it is often useful to gather counts of other events, filter them based on execution mode, and/or be notified on counter overflow. These patches flesh out the implementations of various PMU registers including PM[X]EVCNTR and PM[X]EVTYPER, add a struct definition to represent arbitrary counter types, implement mode filtering, send interrupts on counter overflow, and add instruction, cycle, and software increment events.
Since v5 [1] I have: * Taken a first pass at addressing migration * Restructured the list of supported events, and ensured they're all initialized * Fixed aliasing for PMOVSSET * Added ARM_CP_IO for PMINTENCLR and PMINTENCLR_EL1 * Addressed a few non-code issues (comment style, patch staging, spelling, etc.) [1] - https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg06830.html Aaron Lindsay (14): target/arm: Mark PMINTENCLR and PMINTENCLR_EL1 accesses as possibly doing IO target/arm: Mask PMOVSR writes based on supported counters migration: Add post_save function to VMStateDescription target/arm: Swap PMU values before/after migrations target/arm: Reorganize PMCCNTR accesses target/arm: Filter cycle counter based on PMCCFILTR_EL0 target/arm: Allow AArch32 access for PMCCFILTR target/arm: Implement PMOVSSET target/arm: Add array for supported PMU events, generate PMCEID[01] target/arm: Finish implementation of PM[X]EVCNTR and PM[X]EVTYPER target/arm: PMU: Add instruction and cycle events target/arm: PMU: Set PMCR.N to 4 target/arm: Implement PMSWINC target/arm: Send interrupts on PMU counter overflow docs/devel/migration.rst | 9 +- include/migration/vmstate.h | 1 + migration/vmstate.c | 10 +- target/arm/cpu.c | 28 +- target/arm/cpu.h | 68 +++- target/arm/cpu64.c | 2 - target/arm/helper.c | 781 ++++++++++++++++++++++++++++++++---- target/arm/machine.c | 19 + 8 files changed, 817 insertions(+), 101 deletions(-) -- 2.19.1