Add the callbacks required by host PMU to support monitoring guest TLB operations.
Signed-off-by: Punit Agrawal <[email protected]> Cc: Christoffer Dall <[email protected]> Cc: Marc Zyngier <[email protected]> --- virt/kvm/arm/host_pmu.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/virt/kvm/arm/host_pmu.c b/virt/kvm/arm/host_pmu.c index fc610ccc169a..22c3aef17ec4 100644 --- a/virt/kvm/arm/host_pmu.c +++ b/virt/kvm/arm/host_pmu.c @@ -13,6 +13,7 @@ #include <asm/kvm_emulate.h> enum host_pmu_events { + tlb_invalidate, KVM_HOST_MAX_EVENTS, }; @@ -40,10 +41,59 @@ struct event_data { struct list_head event_list; }; +static u64 get_tlb_invalidate_count(struct kvm *kvm) +{ + struct kvm_vcpu *vcpu; + u64 val = 0; + int i; + + kvm_for_each_vcpu(i, vcpu, kvm) + val += vcpu->stat.tlb_invalidate; + + return val; +} + +static void configure_tlb_invalidate(struct kvm *kvm, bool enable) +{ + struct kvm_vcpu *vcpu; + int i; + + kvm_arm_halt_guest(kvm); + kvm_for_each_vcpu(i, vcpu, kvm) { + unsigned long hcr = vcpu_get_hcr(vcpu); + + if (enable) + hcr |= HCR_TTLB; + else + hcr &= ~HCR_TTLB; + + vcpu_set_hcr(vcpu, hcr); + } + kvm_arm_resume_guest(kvm); +} + static struct kvm_event_cb event_callbacks[] = { + { + .event = tlb_invalidate, + .get_event_count = get_tlb_invalidate_count, + .configure_event = configure_tlb_invalidate, + } }; +static ssize_t events_sysfs_show(struct device *dev, + struct device_attribute *attr, char *page) +{ + struct perf_pmu_events_attr *pmu_attr; + + pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr); + + return sprintf(page, "event=0x%03llx,vm=?\n", pmu_attr->id); +} +PMU_EVENT_ATTR(tlb_invalidate, event_attr_tlb_invalidate, tlb_invalidate, + events_sysfs_show); + static struct attribute *event_attrs[] = { + &event_attr_tlb_invalidate.attr.attr, NULL, }; -- 2.11.0
