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generated by cgit v1.2.2 (git 2.25.0) at 2025-10-05 18:58:28 -0400
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#ifndef __KVM_X86_PMU_H
#define __KVM_X86_PMU_H

#define vcpu_to_pmu(vcpu) (&(vcpu)->arch.pmu)
#define pmu_to_vcpu(pmu)  (container_of((pmu), struct kvm_vcpu, arch.pmu))
#define pmc_to_pmu(pmc)   (&(pmc)->vcpu->arch.pmu)

/* retrieve the 4 bits for EN and PMI out of IA32_FIXED_CTR_CTRL */
#define fixed_ctrl_field(ctrl_reg, idx) (((ctrl_reg) >> ((idx)*4)) & 0xf)

struct kvm_event_hw_type_mapping {
	u8 eventsel;
	u8 unit_mask;
	unsigned event_type;
};

struct kvm_pmu_ops {
	unsigned (*find_arch_event)(struct kvm_pmu *pmu, u8 event_select,
				    u8 unit_mask);
	unsigned (*find_fixed_event)(int idx);
	bool (*pmc_is_enabled)(struct kvm_pmc *pmc);
	struct kvm_pmc *(*pmc_idx_to_pmc)(struct kvm_pmu *pmu, int pmc_idx);
	struct kvm_pmc *(*msr_idx_to_pmc)(struct kvm_vcpu *vcpu, unsigned idx);
	int (*is_valid_msr_idx)(struct kvm_vcpu *vcpu, unsigned idx);
	bool (*is_valid_msr)(struct kvm_vcpu *vcpu, u32 msr);
	int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
	int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
	void (*refresh)(struct kvm_vcpu *vcpu);
	void (*init)(struct kvm_vcpu *vcpu);
	void (*reset)(struct kvm_vcpu *vcpu);
};

static inline u64 pmc_bitmask(struct kvm_pmc *pmc)
{
	struct kvm_pmu *pmu = pmc_to_pmu(pmc);

	return pmu->counter_bitmask[pmc->type];
}

static inline u64 pmc_read_counter(struct kvm_pmc *pmc)
{
	u64 counter, enabled, running;

	counter = pmc->counter;
	if (pmc->perf_event)
		counter += perf_event_read_value(pmc->perf_event,
						 &enabled, &running);
	/* FIXME: Scaling needed? */
	return counter & pmc_bitmask(pmc);
}

static inline void pmc_stop_counter(struct kvm_pmc *pmc)
{
	if (pmc->perf_event) {
		pmc->counter = pmc_read_counter(pmc);
		perf_event_release_kernel(pmc->perf_event);
		pmc->perf_event = NULL;
	}
}

static inline bool pmc_is_gp(struct kvm_pmc *pmc)
{
	return pmc->type == KVM_PMC_GP;
}

static inline bool pmc_is_fixed(struct kvm_pmc *pmc)
{
	return pmc->type == KVM_PMC_FIXED;
}

static inline bool pmc_is_enabled(struct kvm_pmc *pmc)
{
	return kvm_x86_ops->pmu_ops->pmc_is_enabled(pmc);
}