1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * Copyright (C) 2015 Linaro Ltd.
  4 * Author: Shannon Zhao <shannon.zhao@linaro.org>
  5 */
  6
  7#ifndef __ASM_ARM_KVM_PMU_H
  8#define __ASM_ARM_KVM_PMU_H
  9
 10#include <linux/perf_event.h>
 11#include <asm/perf_event.h>
 12
 13#define ARMV8_PMU_CYCLE_IDX		(ARMV8_PMU_MAX_COUNTERS - 1)
 14#define ARMV8_PMU_MAX_COUNTER_PAIRS	((ARMV8_PMU_MAX_COUNTERS + 1) >> 1)
 15
 16#ifdef CONFIG_KVM_ARM_PMU
 17
 18struct kvm_pmc {
 19	u8 idx;	/* index into the pmu->pmc array */
 20	struct perf_event *perf_event;
 21};
 22
 23struct kvm_pmu {
 24	int irq_num;
 25	struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
 26	DECLARE_BITMAP(chained, ARMV8_PMU_MAX_COUNTER_PAIRS);
 27	bool ready;
 28	bool created;
 29	bool irq_level;
 30};
 31
 32#define kvm_arm_pmu_v3_ready(v)		((v)->arch.pmu.ready)
 33#define kvm_arm_pmu_irq_initialized(v)	((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
 34u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
 35void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
 36u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
 37void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu);
 38void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
 39void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
 40void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
 41void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
 42void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
 43void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
 44bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
 45void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
 46void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
 47void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
 48void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
 49				    u64 select_idx);
 50bool kvm_arm_support_pmu_v3(void);
 51int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
 52			    struct kvm_device_attr *attr);
 53int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
 54			    struct kvm_device_attr *attr);
 55int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
 56			    struct kvm_device_attr *attr);
 57int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
 58#else
 59struct kvm_pmu {
 60};
 61
 62#define kvm_arm_pmu_v3_ready(v)		(false)
 63#define kvm_arm_pmu_irq_initialized(v)	(false)
 64static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
 65					    u64 select_idx)
 66{
 67	return 0;
 68}
 69static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
 70					     u64 select_idx, u64 val) {}
 71static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
 72{
 73	return 0;
 74}
 75static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {}
 76static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
 77static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
 78static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
 79static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
 80static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
 81static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
 82static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
 83{
 84	return false;
 85}
 86static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
 87static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
 88static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
 89static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
 90						  u64 data, u64 select_idx) {}
 91static inline bool kvm_arm_support_pmu_v3(void) { return false; }
 92static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
 93					  struct kvm_device_attr *attr)
 94{
 95	return -ENXIO;
 96}
 97static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
 98					  struct kvm_device_attr *attr)
 99{
100	return -ENXIO;
101}
102static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
103					  struct kvm_device_attr *attr)
104{
105	return -ENXIO;
106}
107static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
108{
109	return 0;
110}
111#endif
112
113#endif