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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>
This commit is contained in:
Joerg Roedel 2010-02-24 18:59:14 +01:00 committed by Avi Kivity
parent ecf1405df2
commit 2e554e8d67
3 changed files with 28 additions and 0 deletions
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5
arch/x86/kvm/svm.c
View File

@ -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);

22
arch/x86/kvm/trace.h
View File

@ -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
*/

1
arch/x86/kvm/x86.c
View File

@ -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);