include/kvm/arm_pmu.h

Source file repositories/reference/linux-study-clean/include/kvm/arm_pmu.h

File Facts

System
Linux kernel
Corpus path
include/kvm/arm_pmu.h
Extension
.h
Size
6247 bytes
Lines
202
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct kvm_pmc {
	u8 idx;	/* index into the pmu->pmc array */
	struct perf_event *perf_event;
};

struct kvm_pmu_events {
	u64 events_host;
	u64 events_guest;
};

struct kvm_pmu {
	struct irq_work overflow_work;
	struct kvm_pmu_events events;
	struct kvm_pmc pmc[KVM_ARMV8_PMU_MAX_COUNTERS];
	int irq_num;
	bool created;
};

struct arm_pmu_entry {
	struct list_head entry;
	struct arm_pmu *arm_pmu;
};

bool kvm_supports_guest_pmuv3(void);
#define kvm_arm_pmu_irq_initialized(v)	((v)->arch.pmu.irq_num != 0)
u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu, u64 select_idx);
void kvm_pmu_set_counter_value(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
void kvm_pmu_set_counter_value_user(struct kvm_vcpu *vcpu, u64 select_idx, u64 val);
u64 kvm_pmu_implemented_counter_mask(struct kvm_vcpu *vcpu);
u64 kvm_pmu_accessible_counter_mask(struct kvm_vcpu *vcpu);
u64 kvm_pmu_get_pmceid(struct kvm_vcpu *vcpu, bool pmceid1);
void kvm_pmu_vcpu_init(struct kvm_vcpu *vcpu);
void kvm_pmu_vcpu_destroy(struct kvm_vcpu *vcpu);
void kvm_pmu_reprogram_counter_mask(struct kvm_vcpu *vcpu, u64 val);
void kvm_pmu_flush_hwstate(struct kvm_vcpu *vcpu);
void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu);
bool kvm_pmu_update_run(struct kvm_vcpu *vcpu);
void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, u64 val);
void kvm_pmu_handle_pmcr(struct kvm_vcpu *vcpu, u64 val);
void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, u64 data,
				    u64 select_idx);
void kvm_vcpu_reload_pmu(struct kvm_vcpu *vcpu);
int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu,
			    struct kvm_device_attr *attr);
int kvm_arm_pmu_v3_get_attr(struct kvm_vcpu *vcpu,
			    struct kvm_device_attr *attr);
int kvm_arm_pmu_v3_has_attr(struct kvm_vcpu *vcpu,
			    struct kvm_device_attr *attr);
int kvm_arm_pmu_v3_enable(struct kvm_vcpu *vcpu);

struct kvm_pmu_events *kvm_get_pmu_events(void);
void kvm_vcpu_pmu_restore_guest(struct kvm_vcpu *vcpu);
void kvm_vcpu_pmu_restore_host(struct kvm_vcpu *vcpu);
void kvm_vcpu_pmu_resync_el0(void);

#define kvm_vcpu_has_pmu(vcpu)					\
	(vcpu_has_feature(vcpu, KVM_ARM_VCPU_PMU_V3))

/*
 * Updates the vcpu's view of the pmu events for this cpu.
 * Must be called before every vcpu run after disabling interrupts, to ensure
 * that an interrupt cannot fire and update the structure.
 */
#define kvm_pmu_update_vcpu_events(vcpu)				\
	do {								\
		if (!has_vhe() && system_supports_pmuv3())		\
			vcpu->arch.pmu.events = *kvm_get_pmu_events();	\
	} while (0)

u8 kvm_arm_pmu_get_pmuver_limit(void);
u64 kvm_pmu_evtyper_mask(struct kvm *kvm);
int kvm_arm_set_default_pmu(struct kvm *kvm);
u8 kvm_arm_pmu_get_max_counters(struct kvm *kvm);

u64 kvm_vcpu_read_pmcr(struct kvm_vcpu *vcpu);
bool kvm_pmu_counter_is_hyp(struct kvm_vcpu *vcpu, unsigned int idx);
void kvm_pmu_nested_transition(struct kvm_vcpu *vcpu);
#else
struct kvm_pmu {
};

static inline bool kvm_supports_guest_pmuv3(void)
{
	return false;
}

#define kvm_arm_pmu_irq_initialized(v)	(false)
static inline u64 kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
					    u64 select_idx)

Annotation

Implementation Notes