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>

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 8953292acfd94ef4ce5085594824a1acd7726a97..218949cce1a0975eac7cd566bfa1cd75471a975d 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/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);
 }

diff --git a/include/asm-x86/kvm.h b/include/asm-x86/kvm.h
index 80eefef2cc76cd3b54ba93856a8fc500f639d736..6f1840812e595f05b7d5a064412e05d7e756b1cc 100644 (file)
--- a/include/asm-x86/kvm.h
+++ b/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