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KVM: MMU: support disable/enable mmu audit dynamicly

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Add a r/w module parameter named 'mmu_audit', it can control audit
enable/disable:

enable:
  echo 1 > /sys/module/kvm/parameters/mmu_audit

disable:
  echo 0 > /sys/module/kvm/parameters/mmu_audit

This patch not change the logic

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Xiao Guangrong
2010-08-30 18:22:53 +08:00
committed by Avi Kivity
parent 84e0cefa8d
commit 8b1fe17cc7
4 changed files with 102 additions and 21 deletions
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19
arch/x86/kvm/mmutrace.h
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@@ -195,6 +195,25 @@ DEFINE_EVENT(kvm_mmu_page_class, kvm_mmu_prepare_zap_page,
TP_ARGS(sp)
);
TRACE_EVENT(
kvm_mmu_audit,
TP_PROTO(struct kvm_vcpu *vcpu, int audit_point),
TP_ARGS(vcpu, audit_point),
TP_STRUCT__entry(
__field(struct kvm_vcpu *, vcpu)
__field(int, audit_point)
),
TP_fast_assign(
__entry->vcpu = vcpu;
__entry->audit_point = audit_point;
),
TP_printk("vcpu:%d %s", __entry->vcpu->cpu,
audit_point_name[__entry->audit_point])
);
#endif /* _TRACE_KVMMMU_H */
#undef TRACE_INCLUDE_PATH