On Wed, Nov 16, 2016 at 11:09:20AM -0600, Wei Huang wrote: > KVM calls kvm_pmu_set_counter_event_type() when PMCCFILTR is configured. > But this function can't deals with PMCCFILTR correctly because the evtCount > bits of PMCCFILTR, which is reserved 0, conflits with the SW_INCR event > type of other PMXEVTYPER<n> registers. To fix it, when eventsel == 0, this > function shouldn't return immediately; instead it needs to check further > if select_idx is ARMV8_PMU_CYCLE_IDX. > > Another issue is that KVM shouldn't copy the eventsel bits of PMCCFILTER > blindly to attr.config. Instead it ought to convert the request to the > "cpu cycle" event type (i.e. 0x11). > > To support this patch and to prevent duplicated definitions, a limited > set of ARMv8 perf event types were relocated from perf_event.c to > asm/perf_event.h. > > Signed-off-by: Wei Huang <wei@xxxxxxxxxx> > --- > arch/arm64/include/asm/perf_event.h | 10 +++++++++- > arch/arm64/kernel/perf_event.c | 10 +--------- > virt/kvm/arm/pmu.c | 8 +++++--- > 3 files changed, 15 insertions(+), 13 deletions(-) Acked-by: Will Deacon <will.deacon@xxxxxxx> I'm assuming this will go via kvm-arm. Will -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
