[03/35] KVM: SVM: Add tracepoint for skinit instruction

Commit Message

Avi Kivity Nov. 19, 2009, 1:34 p.m. UTC

None

Patch

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index ba18fb7..8b9f6fb 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1987,6 +1987,14 @@  static int invlpga_interception(struct vcpu_svm *svm)
 	return 1;
 }
 
+static int skinit_interception(struct vcpu_svm *svm)
+{
+	trace_kvm_skinit(svm->vmcb->save.rip, svm->vcpu.arch.regs[VCPU_REGS_RAX]);
+
+	kvm_queue_exception(&svm->vcpu, UD_VECTOR);
+	return 1;
+}
+
 static int invalid_op_interception(struct vcpu_svm *svm)
 {
 	kvm_queue_exception(&svm->vcpu, UD_VECTOR);
@@ -2350,7 +2358,7 @@  static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = {
 	[SVM_EXIT_VMSAVE]			= vmsave_interception,
 	[SVM_EXIT_STGI]				= stgi_interception,
 	[SVM_EXIT_CLGI]				= clgi_interception,
-	[SVM_EXIT_SKINIT]			= invalid_op_interception,
+	[SVM_EXIT_SKINIT]			= skinit_interception,
 	[SVM_EXIT_WBINVD]                       = emulate_on_interception,
 	[SVM_EXIT_MONITOR]			= invalid_op_interception,
 	[SVM_EXIT_MWAIT]			= invalid_op_interception,
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 7e1f08e..816e044 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -492,6 +492,28 @@  TRACE_EVENT(kvm_invlpga,
 	TP_printk("rip: 0x%016llx asid: %d address: 0x%016llx\n",
 		  __entry->rip, __entry->asid, __entry->address)
 );
+
+/*
+ * Tracepoint for nested #vmexit because of interrupt pending
+ */
+TRACE_EVENT(kvm_skinit,
+	    TP_PROTO(__u64 rip, __u32 slb),
+	    TP_ARGS(rip, slb),
+
+	TP_STRUCT__entry(
+		__field(	__u64,	rip	)
+		__field(	__u32,	slb	)
+	),
+
+	TP_fast_assign(
+		__entry->rip		=	rip;
+		__entry->slb		=	slb;
+	),
+
+	TP_printk("rip: 0x%016llx slb: 0x%08x\n",
+		  __entry->rip, __entry->slb)
+);
+
 #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 86596fc..098e7f8 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4989,3 +4989,4 @@  EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga);
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);