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Subject[PATCH 05/11] KVM: SVM: Add kvm_nested_intercepts tracepoint
Date
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>
---
arch/x86/kvm/svm.c | 5 +++++
arch/x86/kvm/trace.h | 22 ++++++++++++++++++++++
arch/x86/kvm/x86.c | 1 +
3 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index b048c2b..6b7590a 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1838,6 +1838,11 @@ 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);
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 @@ 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
*/
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 7b436c8..2c24cb5 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5924,3 +5924,4 @@ 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);
--
1.7.0



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