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KVM: Expose a version 2 architectural PMU to a guests

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Use perf_events to emulate an architectural PMU, version 2.

Based on PMU version 1 emulation by Avi Kivity.

[avi: adjust for cpuid.c]
[jan: fix anonymous field initialization for older gcc]

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gleb Natapov
2011-11-10 14:57:22 +02:00
committed by Avi Kivity
parent 8934208221
commit f5132b0138
7 changed files with 600 additions and 10 deletions
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48
arch/x86/include/asm/kvm_host.h
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@@ -16,10 +16,12 @@
#include <linux/mmu_notifier.h>
#include <linux/tracepoint.h>
#include <linux/cpumask.h>
#include <linux/irq_work.h>
#include <linux/kvm.h>
#include <linux/kvm_para.h>
#include <linux/kvm_types.h>
#include <linux/perf_event.h>
#include <asm/pvclock-abi.h>
#include <asm/desc.h>
@@ -291,6 +293,37 @@ struct kvm_mmu {
u64 pdptrs[4]; /* pae */
};
enum pmc_type {
KVM_PMC_GP = 0,
KVM_PMC_FIXED,
};
struct kvm_pmc {
enum pmc_type type;
u8 idx;
u64 counter;
u64 eventsel;
struct perf_event *perf_event;
struct kvm_vcpu *vcpu;
};
struct kvm_pmu {
unsigned nr_arch_gp_counters;
unsigned nr_arch_fixed_counters;
unsigned available_event_types;
u64 fixed_ctr_ctrl;
u64 global_ctrl;
u64 global_status;
u64 global_ovf_ctrl;
u64 counter_bitmask[2];
u64 global_ctrl_mask;
u8 version;
struct kvm_pmc gp_counters[X86_PMC_MAX_GENERIC];
struct kvm_pmc fixed_counters[X86_PMC_MAX_FIXED];
struct irq_work irq_work;
u64 reprogram_pmi;
};
struct kvm_vcpu_arch {
/*
* rip and regs accesses must go through
@@ -424,6 +457,8 @@ struct kvm_vcpu_arch {
unsigned access;
gfn_t mmio_gfn;
struct kvm_pmu pmu;
/* used for guest single stepping over the given code position */
unsigned long singlestep_rip;
@@ -891,4 +926,17 @@ extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err);
int kvm_is_in_guest(void);
void kvm_pmu_init(struct kvm_vcpu *vcpu);
void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
void kvm_pmu_reset(struct kvm_vcpu *vcpu);
void kvm_pmu_cpuid_update(struct kvm_vcpu *vcpu);
bool kvm_pmu_msr(struct kvm_vcpu *vcpu, u32 msr);
int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data);
int kvm_pmu_read_pmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
void kvm_handle_pmu_event(struct kvm_vcpu *vcpu);
void kvm_deliver_pmi(struct kvm_vcpu *vcpu);
#endif /* _ASM_X86_KVM_HOST_H */