[PATCH] KVM: SVM: Add tracepoint for cr_interception

[Haiwei Li <lihaiwei.kernel@gmail.com>]

From: Haiwei Li <lihaiwei@tencent.com>

Add trace_kvm_cr_write and trace_kvm_cr_read for svm.

Signed-off-by: Haiwei Li <lihaiwei@tencent.com>
---
  arch/x86/kvm/svm/svm.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 03dd7bac8034..2c6dea48ba62 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2261,6 +2261,7 @@ static int cr_interception(struct vcpu_svm *svm)
  	if (cr >= 16) { /* mov to cr */
  		cr -= 16;
  		val = kvm_register_read(&svm->vcpu, reg);
+		trace_kvm_cr_write(cr, val);
  		switch (cr) {
  		case 0:
  			if (!check_selective_cr0_intercepted(svm, val))
@@ -2306,6 +2307,7 @@ static int cr_interception(struct vcpu_svm *svm)
  			return 1;
  		}
  		kvm_register_write(&svm->vcpu, reg, val);
+		trace_kvm_cr_read(cr, val);
  	}
  	return kvm_complete_insn_gp(&svm->vcpu, err);
  }
--
2.18.4