KVM: SVM: Add tracepoint for nested vmrun

This patch adds a dedicated kvm tracepoint for a nested
vmrun.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 884bffc..907af3f 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1726,6 +1726,12 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm)
        /* nested_vmcb is our indicator if nested SVM is activated */
        svm->nested.vmcb = svm->vmcb->save.rax;
 
+       trace_kvm_nested_vmrun(svm->vmcb->save.rip - 3, svm->nested.vmcb,
+                              nested_vmcb->save.rip,
+                              nested_vmcb->control.int_ctl,
+                              nested_vmcb->control.event_inj,
+                              nested_vmcb->control.nested_ctl);
+
        /* Clear internal status */
        kvm_clear_exception_queue(&svm->vcpu);
        kvm_clear_interrupt_queue(&svm->vcpu);

diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 0d480e7..b5798e1 100644 (file)
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -349,6 +349,39 @@ TRACE_EVENT(kvm_apic_accept_irq,
                  __entry->coalesced ? " (coalesced)" : "")
 );
 
+/*
+ * Tracepoint for nested VMRUN
+ */
+TRACE_EVENT(kvm_nested_vmrun,
+           TP_PROTO(__u64 rip, __u64 vmcb, __u64 nested_rip, __u32 int_ctl,
+                    __u32 event_inj, bool npt),
+           TP_ARGS(rip, vmcb, nested_rip, int_ctl, event_inj, npt),
+
+       TP_STRUCT__entry(
+               __field(        __u64,          rip             )
+               __field(        __u64,          vmcb            )
+               __field(        __u64,          nested_rip      )
+               __field(        __u32,          int_ctl         )
+               __field(        __u32,          event_inj       )
+               __field(        bool,           npt             )
+       ),
+
+       TP_fast_assign(
+               __entry->rip            = rip;
+               __entry->vmcb           = vmcb;
+               __entry->nested_rip     = nested_rip;
+               __entry->int_ctl        = int_ctl;
+               __entry->event_inj      = event_inj;
+               __entry->npt            = npt;
+       ),
+
+       TP_printk("rip: 0x%016llx vmcb: 0x%016llx nrip: 0x%016llx int_ctl: 0x%08x "
+                 "event_inj: 0x%08x npt: %s\n",
+               __entry->rip, __entry->vmcb, __entry->nested_rip,
+               __entry->int_ctl, __entry->event_inj,
+               __entry->npt ? "on" : "off")
+);
+
 #endif /* _TRACE_KVM_H */
 
 /* This part must be outside protection */

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 4de5bc0..3ab2f90 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4984,3 +4984,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun);