1 /* SPDX-License-Identifier: GPL-2.0 */
9 #define vcpu_to_pmu(vcpu) (&(vcpu)->arch.pmu)
11 #define pmc_to_pmu(pmc)   (&(pmc)->vcpu->arch.pmu)
16 /* retrieve the 4 bits for EN and PMI out of IA32_FIXED_CTR_CTRL */
58 	 * to/for the guest if the guest PMU supports at least "Architectural  in kvm_pmu_has_perf_global_ctrl()
63 	return pmu->version > 1;  in kvm_pmu_has_perf_global_ctrl()
67  * KVM tracks all counters in 64-bit bitmaps, with general purpose counters
68  * mapped to bits 31:0 and fixed counters mapped to 63:32, e.g. fixed counter 0
69  * is tracked internally via index 32.  On Intel, (AMD doesn't support fixed
71  * and similar MSRs, i.e. tracking fixed counters at base index 32 reduces the
76  * NOT safe for guest lookups, e.g. will do the wrong thing if passed a raw
78  * for RDPMC, not by adding 32 to the fixed counter index).
82 	if (idx < pmu->nr_arch_gp_counters)  in kvm_pmc_idx_to_pmc()
83 		return &pmu->gp_counters[idx];  in kvm_pmc_idx_to_pmc()
85 	idx -= KVM_FIXED_PMC_BASE_IDX;  in kvm_pmc_idx_to_pmc()
86 	if (idx >= 0 && idx < pmu->nr_arch_fixed_counters)  in kvm_pmc_idx_to_pmc()
87 		return &pmu->fixed_counters[idx];  in kvm_pmc_idx_to_pmc()
102 	return pmu->counter_bitmask[pmc->type];  in pmc_bitmask()
109 	counter = pmc->counter + pmc->emulated_counter;  in pmc_read_counter()
111 	if (pmc->perf_event && !pmc->is_paused)  in pmc_read_counter()
112 		counter += perf_event_read_value(pmc->perf_event,  in pmc_read_counter()
122 	return pmc->type == KVM_PMC_GP;  in pmc_is_gp()
127 	return pmc->type == KVM_PMC_FIXED;  in pmc_is_fixed()
133 	return !(pmu->global_ctrl_rsvd & data);  in kvm_valid_perf_global_ctrl()
143 	if (msr >= base && msr < base + pmu->nr_arch_gp_counters) {  in get_gp_pmc()
144 		u32 index = array_index_nospec(msr - base,  in get_gp_pmc()  local
145 					       pmu->nr_arch_gp_counters);  in get_gp_pmc()
147 		return &pmu->gp_counters[index];  in get_gp_pmc()
158 	if (msr >= base && msr < base + pmu->nr_arch_fixed_counters) {  in get_fixed_pmc()
159 		u32 index = array_index_nospec(msr - base,  in get_fixed_pmc()  local
160 					       pmu->nr_arch_fixed_counters);  in get_fixed_pmc()
162 		return &pmu->fixed_counters[index];  in get_fixed_pmc()
173 		return fixed_ctrl_field(pmu->fixed_ctr_ctrl,  in pmc_speculative_in_use()
174 					pmc->idx - KVM_FIXED_PMC_BASE_IDX) &  in pmc_speculative_in_use()
177 	return pmc->eventsel & ARCH_PERFMON_EVENTSEL_ENABLE;  in pmc_speculative_in_use()
186 	int min_nr_gp_ctrs = pmu_ops->MIN_NR_GP_COUNTERS;  in kvm_init_pmu_capability()
192 	 * for hybrid PMUs until KVM gains a way to let userspace opt-in.  in kvm_init_pmu_capability()
203 		 * there are a non-zero number of counters, but fewer than what  in kvm_init_pmu_capability()
220 					  pmu_ops->MAX_NR_GP_COUNTERS);  in kvm_init_pmu_capability()
232 	set_bit(pmc->idx, pmc_to_pmu(pmc)->reprogram_pmi);  in kvm_pmu_request_counter_reprogram()
233 	kvm_make_request(KVM_REQ_PMU, pmc->vcpu);  in kvm_pmu_request_counter_reprogram()
244 		set_bit(bit, pmu->reprogram_pmi);  in reprogram_counters()
249  * Check if a PMC is enabled by comparing it against global_ctrl bits.
260 	return test_bit(pmc->idx, (unsigned long *)&pmu->global_ctrl);  in pmc_is_globally_enabled()