KVM: SVM: add tracing support for TDP page faults

To distinguish between real page faults and nested page faults they should be
traced as different events. This is implemented by this patch.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

arch/x86/kvm/svm.c

@@ -1011,6 +1011,10 @@ static int pf_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
 		KVMTRACE_3D(PAGE_FAULT, &svm->vcpu, error_code,
 			    (u32)fault_address, (u32)(fault_address >> 32),
 			    handler);
+	else
+		KVMTRACE_3D(TDP_FAULT, &svm->vcpu, error_code,
+			    (u32)fault_address, (u32)(fault_address >> 32),
+			    handler);
 
 	return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code);
 }

include/asm-x86/kvm.h

@@ -228,5 +228,6 @@ struct kvm_pit_state {
 #define KVM_TRC_CLTS             (KVM_TRC_HANDLER + 0x12)
 #define KVM_TRC_LMSW             (KVM_TRC_HANDLER + 0x13)
 #define KVM_TRC_APIC_ACCESS      (KVM_TRC_HANDLER + 0x14)
+#define KVM_TRC_TDP_FAULT        (KVM_TRC_HANDLER + 0x15)
 
 #endif