commit 2e554e8d67926024b01e97d2fe652810165354e2
author Joerg Roedel <joerg.roedel@amd.com> Wed Feb 24 18:59:14 2010 +0100
committer Avi Kivity <avi@redhat.com> Sun Apr 25 13:53:10 2010 +0300
tree a0ace1e673875471425235b482c2fb645c9caa88
parent ecf1405df235da3efea213427ac7da7f816e9d06

KVM: SVM: Add kvm_nested_intercepts tracepoint

This patch adds a tracepoint to get information about the
most important intercept bitmasks from the nested vmcb.

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

arch/x86/kvm/svm.c

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 2e4e089..cac761c 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1845,6 +1845,11 @@
 			       nested_vmcb->control.event_inj,
 			       nested_vmcb->control.nested_ctl);
 
+	trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr_read,
+				    nested_vmcb->control.intercept_cr_write,
+				    nested_vmcb->control.intercept_exceptions,
+				    nested_vmcb->control.intercept);
+
 	/* Clear internal status */
 	kvm_clear_exception_queue(&svm->vcpu);
 	kvm_clear_interrupt_queue(&svm->vcpu);

arch/x86/kvm/trace.h

diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 12f8d2d..17b52cc 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -419,6 +419,28 @@
 		__entry->npt ? "on" : "off")
 );
 
+TRACE_EVENT(kvm_nested_intercepts,
+	    TP_PROTO(__u16 cr_read, __u16 cr_write, __u32 exceptions, __u64 intercept),
+	    TP_ARGS(cr_read, cr_write, exceptions, intercept),
+
+	TP_STRUCT__entry(
+		__field(	__u16,		cr_read		)
+		__field(	__u16,		cr_write	)
+		__field(	__u32,		exceptions	)
+		__field(	__u64,		intercept	)
+	),
+
+	TP_fast_assign(
+		__entry->cr_read	= cr_read;
+		__entry->cr_write	= cr_write;
+		__entry->exceptions	= exceptions;
+		__entry->intercept	= intercept;
+	),
+
+	TP_printk("cr_read: %04x cr_write: %04x excp: %08x intercept: %016llx",
+		__entry->cr_read, __entry->cr_write, __entry->exceptions,
+		__entry->intercept)
+);
 /*
  * Tracepoint for #VMEXIT while nested
  */

arch/x86/kvm/x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 3a367f3..1aa4d6e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5909,3 +5909,4 @@
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts);