cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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pmc.h (1116B)

      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
     12typedef void (*perf_irq_t)(struct pt_regs *);
     13extern perf_irq_t perf_irq;
     14
     15int reserve_pmc_hardware(perf_irq_t new_perf_irq);
     16void release_pmc_hardware(void);
     17void ppc_enable_pmcs(void);
     18
     19#ifdef CONFIG_PPC_BOOK3S_64
     20#include <asm/lppaca.h>
     21#include <asm/firmware.h>
     22
     23static 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
     38static inline int ppc_get_pmu_inuse(void)
     39{
     40	return get_paca()->pmcregs_in_use;
     41}
     42#endif
     43
     44extern void power4_enable_pmcs(void);
     45
     46#else /* CONFIG_PPC64 */
     47
     48static inline void ppc_set_pmu_inuse(int inuse) { }
     49
     50#endif
     51
     52#endif /* __KERNEL__ */
     53#endif /* _POWERPC_PMC_H */