1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * pmc.h
4  * Copyright (C) 2004  David Gibson, IBM Corporation
5  */
6 #ifndef _POWERPC_PMC_H
7 #define _POWERPC_PMC_H
8 #ifdef __KERNEL__
9 
10 #include <asm/ptrace.h>
11 
12 typedef void (*perf_irq_t)(struct pt_regs *);
13 extern perf_irq_t perf_irq;
14 
15 int reserve_pmc_hardware(perf_irq_t new_perf_irq);
16 void release_pmc_hardware(void);
17 void ppc_enable_pmcs(void);
18 
19 #ifdef CONFIG_PPC_BOOK3S_64
20 #include <asm/lppaca.h>
21 #include <asm/firmware.h>
22 
ppc_set_pmu_inuse(int inuse)23 static inline void ppc_set_pmu_inuse(int inuse)
24 {
25 #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE)
26 	if (firmware_has_feature(FW_FEATURE_LPAR)) {
27 #ifdef CONFIG_PPC_PSERIES
28 		get_lppaca()->pmcregs_in_use = inuse;
29 #endif
30 	}
31 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
32 	get_paca()->pmcregs_in_use = inuse;
33 #endif
34 #endif
35 }
36 
37 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
ppc_get_pmu_inuse(void)38 static inline int ppc_get_pmu_inuse(void)
39 {
40 	return get_paca()->pmcregs_in_use;
41 }
42 #endif
43 
44 extern void power4_enable_pmcs(void);
45 
46 #else /* CONFIG_PPC64 */
47 
ppc_set_pmu_inuse(int inuse)48 static inline void ppc_set_pmu_inuse(int inuse) { }
49 
50 #endif
51 
52 #endif /* __KERNEL__ */
53 #endif /* _POWERPC_PMC_H */
54