arch/powerpc/include/asm/pmc.h

   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
  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 extern void power4_enable_pmcs(void);
  38
  39 #else /* CONFIG_PPC64 */
  40
  41 static inline void ppc_set_pmu_inuse(int inuse) { }
  42
  43 #endif
  44
  45 #endif /* __KERNEL__ */
  46 #endif /* _POWERPC_PMC_H */