Commit 2e554e8d authored by Joerg Roedel's avatar Joerg Roedel Committed by Avi Kivity
Browse files

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: default avatarJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent ecf1405d

arch/x86/kvm/svm.c

+5 −0
Original line number Diff line number Diff line
@@ -1845,6 +1845,11 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm) 
			       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

+22 −0
Original line number Diff line number Diff line
@@ -419,6 +419,28 @@ TRACE_EVENT(kvm_nested_vmrun, 
		__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

+1 −0
Original line number Diff line number Diff line
@@ -5909,3 +5909,4 @@ 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);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts);