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
 16DECLARE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
 17
 18static __always_inline bool kvm_arm_support_pmu_v3(void)
 19{
 20	return static_branch_likely(&kvm_arm_pmu_available);
 21}
 22
 23#ifdef CONFIG_HW_PERF_EVENTS
 24
 25struct kvm_pmc {
 26	u8 idx;	/* index into the pmu->pmc array */
 27	struct perf_event *perf_event;
 28};
 29
 30struct kvm_pmu {
 31	int irq_num;
 32	struct kvm_pmc pmc[ARMV8_PMU_MAX_COUNTERS];
 33	DECLARE_BITMAP(chained, ARMV8_PMU_MAX_COUNTER_PAIRS);
 34	bool created;
 35	bool irq_level;
 36	struct irq_work overflow_work;
 37};
 38
 39#define kvm_arm_pmu_irq_initialized(v)	((v)->arch.pmu.irq_num >= VGIC_NR_SGIS)
 40u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
 41void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
 42u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu);
 43u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1);
 44void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu);
 45void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
 46void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
 47void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
 48void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val);
 49void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
 50void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
 51bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
 52void kvm_pmu_update_run(struct kvm_vcpu *vcpu);
 53void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
 54void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
 55void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
 56				    u64 select_idx);
 57int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
 58			    struct kvm_device_attr *attr);
 59int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
 60			    struct kvm_device_attr *attr);
 61int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
 62			    struct kvm_device_attr *attr);
 63int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);
 64int kvm_pmu_probe_pmuver(void);
 65#else
 66struct kvm_pmu {
 67};
 68
 69#define kvm_arm_pmu_irq_initialized(v)	(false)
 70static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
 71					    u64 select_idx)
 72{
 73	return 0;
 74}
 75static inline void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu,
 76					     u64 select_idx, u64 val) {}
 77static inline u64 kvm_pmu_valid_counter_mask(struct kvm_vcpu *vcpu)
 78{
 79	return 0;
 80}
 81static inline void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu) {}
 82static inline void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
 83static inline void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu) {}
 84static inline void kvm_pmu_disable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
 85static inline void kvm_pmu_enable_counter_mask(struct kvm_vcpu *vcpu, u64 val) {}
 86static inline void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu) {}
 87static inline void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
 88static inline bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu)
 89{
 90	return false;
 91}
 92static inline void kvm_pmu_update_run(struct kvm_vcpu *vcpu) {}
 93static inline void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val) {}
 94static inline void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val) {}
 95static inline void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu,
 96						  u64 data, u64 select_idx) {}
 97static inline int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
 98					  struct kvm_device_attr *attr)
 99{
100	return -ENXIO;
101}
102static inline int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
103					  struct kvm_device_attr *attr)
104{
105	return -ENXIO;
106}
107static inline int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
108					  struct kvm_device_attr *attr)
109{
110	return -ENXIO;
111}
112static inline int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu)
113{
114	return 0;
115}
116static inline u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1)
117{
118	return 0;
119}
120
121static inline int kvm_pmu_probe_pmuver(void) { return 0xf; }
122
123#endif
124
125#endif