forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
167 lines
4.9 KiB
167 lines
4.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef __KVM_X86_PMU_H |
|
#define __KVM_X86_PMU_H |
|
|
|
#include <linux/nospec.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) |
|
|
|
#define VMWARE_BACKDOOR_PMC_HOST_TSC 0x10000 |
|
#define VMWARE_BACKDOOR_PMC_REAL_TIME 0x10001 |
|
#define VMWARE_BACKDOOR_PMC_APPARENT_TIME 0x10002 |
|
|
|
#define MAX_FIXED_COUNTERS 3 |
|
|
|
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 *(*rdpmc_ecx_to_pmc)(struct kvm_vcpu *vcpu, |
|
unsigned int idx, u64 *mask); |
|
struct kvm_pmc *(*msr_idx_to_pmc)(struct kvm_vcpu *vcpu, u32 msr); |
|
int (*is_valid_rdpmc_ecx)(struct kvm_vcpu *vcpu, unsigned int idx); |
|
bool (*is_valid_msr)(struct kvm_vcpu *vcpu, u32 msr); |
|
int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info); |
|
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); |
|
void (*deliver_pmi)(struct kvm_vcpu *vcpu); |
|
void (*cleanup)(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_release_perf_event(struct kvm_pmc *pmc) |
|
{ |
|
if (pmc->perf_event) { |
|
perf_event_release_kernel(pmc->perf_event); |
|
pmc->perf_event = NULL; |
|
pmc->current_config = 0; |
|
pmc_to_pmu(pmc)->event_count--; |
|
} |
|
} |
|
|
|
static inline void pmc_stop_counter(struct kvm_pmc *pmc) |
|
{ |
|
if (pmc->perf_event) { |
|
pmc->counter = pmc_read_counter(pmc); |
|
pmc_release_perf_event(pmc); |
|
} |
|
} |
|
|
|
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); |
|
} |
|
|
|
static inline bool kvm_valid_perf_global_ctrl(struct kvm_pmu *pmu, |
|
u64 data) |
|
{ |
|
return !(pmu->global_ctrl_mask & data); |
|
} |
|
|
|
/* returns general purpose PMC with the specified MSR. Note that it can be |
|
* used for both PERFCTRn and EVNTSELn; that is why it accepts base as a |
|
* paramenter to tell them apart. |
|
*/ |
|
static inline struct kvm_pmc *get_gp_pmc(struct kvm_pmu *pmu, u32 msr, |
|
u32 base) |
|
{ |
|
if (msr >= base && msr < base + pmu->nr_arch_gp_counters) { |
|
u32 index = array_index_nospec(msr - base, |
|
pmu->nr_arch_gp_counters); |
|
|
|
return &pmu->gp_counters[index]; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
/* returns fixed PMC with the specified MSR */ |
|
static inline struct kvm_pmc *get_fixed_pmc(struct kvm_pmu *pmu, u32 msr) |
|
{ |
|
int base = MSR_CORE_PERF_FIXED_CTR0; |
|
|
|
if (msr >= base && msr < base + pmu->nr_arch_fixed_counters) { |
|
u32 index = array_index_nospec(msr - base, |
|
pmu->nr_arch_fixed_counters); |
|
|
|
return &pmu->fixed_counters[index]; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
static inline u64 get_sample_period(struct kvm_pmc *pmc, u64 counter_value) |
|
{ |
|
u64 sample_period = (-counter_value) & pmc_bitmask(pmc); |
|
|
|
if (!sample_period) |
|
sample_period = pmc_bitmask(pmc) + 1; |
|
return sample_period; |
|
} |
|
|
|
void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel); |
|
void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 ctrl, int fixed_idx); |
|
void reprogram_counter(struct kvm_pmu *pmu, int pmc_idx); |
|
|
|
void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu); |
|
void kvm_pmu_handle_event(struct kvm_vcpu *vcpu); |
|
int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data); |
|
int kvm_pmu_is_valid_rdpmc_ecx(struct kvm_vcpu *vcpu, unsigned int idx); |
|
bool kvm_pmu_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr); |
|
int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info); |
|
int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info); |
|
void kvm_pmu_refresh(struct kvm_vcpu *vcpu); |
|
void kvm_pmu_reset(struct kvm_vcpu *vcpu); |
|
void kvm_pmu_init(struct kvm_vcpu *vcpu); |
|
void kvm_pmu_cleanup(struct kvm_vcpu *vcpu); |
|
void kvm_pmu_destroy(struct kvm_vcpu *vcpu); |
|
int kvm_vm_ioctl_set_pmu_event_filter(struct kvm *kvm, void __user *argp); |
|
|
|
bool is_vmware_backdoor_pmc(u32 pmc_idx); |
|
|
|
extern struct kvm_pmu_ops intel_pmu_ops; |
|
extern struct kvm_pmu_ops amd_pmu_ops; |
|
#endif /* __KVM_X86_PMU_H */
|
|
|