33  * - There are three types of index to access perf counters (PMC):
41  *     3. Global PMC Index (named pmc): pmc is an index specific to PMU
42  *        code. Each pmc, stored in kvm_pmc.idx field, is unique across
44  *        between pmc and perf counters is as the following:
62 	struct kvm_pmc *pmc = perf_event->overflow_handler_context;  in kvm_perf_overflow()  local
63 	struct kvm_pmu *pmu = pmc_to_pmu(pmc);  in kvm_perf_overflow()
65 	if (!test_and_set_bit(pmc->idx,  in kvm_perf_overflow()
67 		__set_bit(pmc->idx, (unsigned long *)&pmu->global_status);  in kvm_perf_overflow()
68 		kvm_make_request(KVM_REQ_PMU, pmc->vcpu);  in kvm_perf_overflow()
76 	struct kvm_pmc *pmc = perf_event->overflow_handler_context;  in kvm_perf_overflow_intr()  local
77 	struct kvm_pmu *pmu = pmc_to_pmu(pmc);  in kvm_perf_overflow_intr()
79 	if (!test_and_set_bit(pmc->idx,  in kvm_perf_overflow_intr()
81 		__set_bit(pmc->idx, (unsigned long *)&pmu->global_status);  in kvm_perf_overflow_intr()
82 		kvm_make_request(KVM_REQ_PMU, pmc->vcpu);  in kvm_perf_overflow_intr()
93 			irq_work_queue(&pmc_to_pmu(pmc)->irq_work);  in kvm_perf_overflow_intr()
95 			kvm_make_request(KVM_REQ_PMI, pmc->vcpu);  in kvm_perf_overflow_intr()
99 static void pmc_reprogram_counter(struct kvm_pmc *pmc, u32 type,  in pmc_reprogram_counter()  argument
116 	attr.sample_period = (-pmc->counter) & pmc_bitmask(pmc);  in pmc_reprogram_counter()
132 						 kvm_perf_overflow, pmc);  in pmc_reprogram_counter()
134 		pr_debug_ratelimited("kvm_pmu: event creation failed %ld for pmc->idx = %d\n",  in pmc_reprogram_counter()
135 			    PTR_ERR(event), pmc->idx);  in pmc_reprogram_counter()
139 	pmc->perf_event = event;  in pmc_reprogram_counter()
140 	clear_bit(pmc->idx, (unsigned long*)&pmc_to_pmu(pmc)->reprogram_pmi);  in pmc_reprogram_counter()
143 void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel)  in reprogram_gp_counter()  argument
151 	pmc->eventsel = eventsel;  in reprogram_gp_counter()
153 	pmc_stop_counter(pmc);  in reprogram_gp_counter()
155 	if (!(eventsel & ARCH_PERFMON_EVENTSEL_ENABLE) || !pmc_is_enabled(pmc))  in reprogram_gp_counter()
166 		config = kvm_x86_ops->pmu_ops->find_arch_event(pmc_to_pmu(pmc),  in reprogram_gp_counter()
176 	pmc_reprogram_counter(pmc, type, config,  in reprogram_gp_counter()
185 void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 ctrl, int idx)  in reprogram_fixed_counter()  argument
190 	pmc_stop_counter(pmc);  in reprogram_fixed_counter()
192 	if (!en_field || !pmc_is_enabled(pmc))  in reprogram_fixed_counter()
195 	pmc_reprogram_counter(pmc, PERF_TYPE_HARDWARE,  in reprogram_fixed_counter()
205 	struct kvm_pmc *pmc = kvm_x86_ops->pmu_ops->pmc_idx_to_pmc(pmu, pmc_idx);  in reprogram_counter()  local
207 	if (!pmc)  in reprogram_counter()
210 	if (pmc_is_gp(pmc))  in reprogram_counter()
211 		reprogram_gp_counter(pmc, pmc->eventsel);  in reprogram_counter()
216 		reprogram_fixed_counter(pmc, ctrl, idx);  in reprogram_counter()
230 		struct kvm_pmc *pmc = kvm_x86_ops->pmu_ops->pmc_idx_to_pmc(pmu, bit);  in kvm_pmu_handle_event()  local
232 		if (unlikely(!pmc || !pmc->perf_event)) {  in kvm_pmu_handle_event()
284 	struct kvm_pmc *pmc;  in kvm_pmu_rdpmc()  local
290 	pmc = kvm_x86_ops->pmu_ops->msr_idx_to_pmc(vcpu, idx, &mask);  in kvm_pmu_rdpmc()
291 	if (!pmc)  in kvm_pmu_rdpmc()
294 	*data = pmc_read_counter(pmc) & mask;  in kvm_pmu_rdpmc()