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KVM: PPC: BookE: Add some more trace points 

Without trace points, debugging what exactly is going on inside guest
code can be very tricky. Add a few more trace points at places that
hopefully tell us more when things go wrong.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2012-08-08 00:44:52 +02:00
parent 862d31f788
commit 6346046c3a
3 changed files with 77 additions and 0 deletions
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3
arch/powerpc/kvm/booke.c
View File

@ -143,6 +143,7 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
unsigned int priority)
{
trace_kvm_booke_queue_irqprio(vcpu, priority);
set_bit(priority, &vcpu->arch.pending_exceptions);
}
@ -457,6 +458,8 @@ int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
static void kvmppc_check_requests(struct kvm_vcpu *vcpu)
{
if (vcpu->requests) {
trace_kvm_check_requests(vcpu);
if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
update_timer_ints(vcpu);
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)

3
arch/powerpc/kvm/e500_tlb.c
View File

@ -312,6 +312,7 @@ static inline void kvmppc_e500_ref_setup(struct tlbe_ref *ref,
static inline void kvmppc_e500_ref_release(struct tlbe_ref *ref)
{
if (ref->flags & E500_TLB_VALID) {
trace_kvm_booke206_ref_release(ref->pfn, ref->flags);
ref->flags = 0;
}
}
@ -1075,6 +1076,8 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
{
trace_kvm_unmap_hva(hva);
/*
* Flush all shadow tlb entries everywhere. This is slow, but
* we are 100% sure that we catch the to be unmapped page

71
arch/powerpc/kvm/trace.h
View File

@ -82,6 +82,21 @@ TRACE_EVENT(kvm_exit,
)
);
TRACE_EVENT(kvm_unmap_hva,
TP_PROTO(unsigned long hva),
TP_ARGS(hva),
TP_STRUCT__entry(
__field( unsigned long, hva )
),
TP_fast_assign(
__entry->hva = hva;
),
TP_printk("unmap hva 0x%lx\n", __entry->hva)
);
TRACE_EVENT(kvm_stlb_inval,
TP_PROTO(unsigned int stlb_index),
TP_ARGS(stlb_index),
@ -149,6 +164,24 @@ TRACE_EVENT(kvm_gtlb_write,
__entry->word1, __entry->word2)
);
TRACE_EVENT(kvm_check_requests,
TP_PROTO(struct kvm_vcpu *vcpu),
TP_ARGS(vcpu),
TP_STRUCT__entry(
__field( __u32, cpu_nr )
__field( __u32, requests )
),
TP_fast_assign(
__entry->cpu_nr = vcpu->vcpu_id;
__entry->requests = vcpu->requests;
),
TP_printk("vcpu=%x requests=%x",
__entry->cpu_nr, __entry->requests)
);
/*************************************************************************
* Book3S trace points *
@ -418,6 +451,44 @@ TRACE_EVENT(kvm_booke206_gtlb_write,
__entry->mas2, __entry->mas7_3)
);
TRACE_EVENT(kvm_booke206_ref_release,
TP_PROTO(__u64 pfn, __u32 flags),
TP_ARGS(pfn, flags),
TP_STRUCT__entry(
__field( __u64, pfn )
__field( __u32, flags )
),
TP_fast_assign(
__entry->pfn = pfn;
__entry->flags = flags;
),
TP_printk("pfn=%llx flags=%x",
__entry->pfn, __entry->flags)
);
TRACE_EVENT(kvm_booke_queue_irqprio,
TP_PROTO(struct kvm_vcpu *vcpu, unsigned int priority),
TP_ARGS(vcpu, priority),
TP_STRUCT__entry(
__field( __u32, cpu_nr )
__field( __u32, priority )
__field( unsigned long, pending )
),
TP_fast_assign(
__entry->cpu_nr = vcpu->vcpu_id;
__entry->priority = priority;
__entry->pending = vcpu->arch.pending_exceptions;
),
TP_printk("vcpu=%x prio=%x pending=%lx",
__entry->cpu_nr, __entry->priority, __entry->pending)
);
#endif
#endif /* _TRACE_KVM_H */