1 // SPDX-License-Identifier: GPL-2.0
37  * - different performance counters/ event selection may be reserved for
47 	/* returns the bit offset of the performance counter register */  in nmi_perfctr_msr_to_bit()
52 			return (msr - MSR_F15H_PERF_CTR) >> 1;  in nmi_perfctr_msr_to_bit()
53 		return msr - MSR_K7_PERFCTR0;  in nmi_perfctr_msr_to_bit()
56 			return msr - MSR_ARCH_PERFMON_PERFCTR0;  in nmi_perfctr_msr_to_bit()
60 			return msr - MSR_P6_PERFCTR0;  in nmi_perfctr_msr_to_bit()
62 			return msr - MSR_KNC_PERFCTR0;  in nmi_perfctr_msr_to_bit()
64 			return msr - MSR_P4_BPU_PERFCTR0;  in nmi_perfctr_msr_to_bit()
69 		return msr - MSR_ARCH_PERFMON_PERFCTR0;  in nmi_perfctr_msr_to_bit()
85 			return (msr - MSR_F15H_PERF_CTL) >> 1;  in nmi_evntsel_msr_to_bit()
86 		return msr - MSR_K7_EVNTSEL0;  in nmi_evntsel_msr_to_bit()
89 			return msr - MSR_ARCH_PERFMON_EVENTSEL0;  in nmi_evntsel_msr_to_bit()
93 			return msr - MSR_P6_EVNTSEL0;  in nmi_evntsel_msr_to_bit()
95 			return msr - MSR_KNC_EVNTSEL0;  in nmi_evntsel_msr_to_bit()
97 			return msr - MSR_P4_BSU_ESCR0;  in nmi_evntsel_msr_to_bit()
102 		return msr - MSR_ARCH_PERFMON_EVENTSEL0;  in nmi_evntsel_msr_to_bit()
110 	unsigned int counter;  in reserve_perfctr_nmi()  local
112 	counter = nmi_perfctr_msr_to_bit(msr);  in reserve_perfctr_nmi()
114 	if (counter > NMI_MAX_COUNTER_BITS)  in reserve_perfctr_nmi()
115 		return 1;  in reserve_perfctr_nmi()
117 	if (!test_and_set_bit(counter, perfctr_nmi_owner))  in reserve_perfctr_nmi()
118 		return 1;  in reserve_perfctr_nmi()
125 	unsigned int counter;  in release_perfctr_nmi()  local
127 	counter = nmi_perfctr_msr_to_bit(msr);  in release_perfctr_nmi()
129 	if (counter > NMI_MAX_COUNTER_BITS)  in release_perfctr_nmi()
132 	clear_bit(counter, perfctr_nmi_owner);  in release_perfctr_nmi()
138 	unsigned int counter;  in reserve_evntsel_nmi()  local
140 	counter = nmi_evntsel_msr_to_bit(msr);  in reserve_evntsel_nmi()
142 	if (counter > NMI_MAX_COUNTER_BITS)  in reserve_evntsel_nmi()
143 		return 1;  in reserve_evntsel_nmi()
145 	if (!test_and_set_bit(counter, evntsel_nmi_owner))  in reserve_evntsel_nmi()
146 		return 1;  in reserve_evntsel_nmi()
153 	unsigned int counter;  in release_evntsel_nmi()  local
155 	counter = nmi_evntsel_msr_to_bit(msr);  in release_evntsel_nmi()
157 	if (counter > NMI_MAX_COUNTER_BITS)  in release_evntsel_nmi()
160 	clear_bit(counter, evntsel_nmi_owner);  in release_evntsel_nmi()