diff --git a/hypervisor/arch/x86/guest/vmcs.c b/hypervisor/arch/x86/guest/vmcs.c
index 2dec33340..04b0abd25 100644
--- a/hypervisor/arch/x86/guest/vmcs.c
+++ b/hypervisor/arch/x86/guest/vmcs.c
@@ -266,6 +266,7 @@ static void init_exec_ctrl(struct acrn_vcpu *vcpu)
 	 * guest access to IO bit-mapped ports causes VM exit
 	 * guest access to MSR causes VM exit
 	 * Activate secondary controls
+	 * Activate tertiary controls
 	 */
 	/* These are bits 1,4-6,8,13-16, and 26, the corresponding bits of
 	 * the IA32_VMX_PROCBASED_CTRLS MSR are always read as 1 --- A.3.2
@@ -273,7 +274,7 @@ static void init_exec_ctrl(struct acrn_vcpu *vcpu)
 	value32 = check_vmx_ctrl(MSR_IA32_VMX_PROCBASED_CTLS,
 			 VMX_PROCBASED_CTLS_TSC_OFF | VMX_PROCBASED_CTLS_TPR_SHADOW |
 			 VMX_PROCBASED_CTLS_IO_BITMAP | VMX_PROCBASED_CTLS_MSR_BITMAP |
-			 VMX_PROCBASED_CTLS_HLT | VMX_PROCBASED_CTLS_SECONDARY);
+			 VMX_PROCBASED_CTLS_HLT | VMX_PROCBASED_CTLS_SECONDARY | VMX_PROCBASED_CTLS_TERTIARY);
 
 	/*Disable VM_EXIT for CR3 access*/
 	value32 &= ~(VMX_PROCBASED_CTLS_CR3_LOAD | VMX_PROCBASED_CTLS_CR3_STORE);
diff --git a/hypervisor/include/arch/x86/msr.h b/hypervisor/include/arch/x86/msr.h
index 7255359fa..e30184da7 100644
--- a/hypervisor/include/arch/x86/msr.h
+++ b/hypervisor/include/arch/x86/msr.h
@@ -254,6 +254,7 @@
 #define MSR_IA32_VMX_TRUE_EXIT_CTLS		0x0000048FU
 #define MSR_IA32_VMX_TRUE_ENTRY_CTLS		0x00000490U
 #define MSR_IA32_VMX_VMFUNC			0x00000491U
+#define MSR_IA32_VMX_PROCBASED_CTLS3		0x00000492U
 #define MSR_IA32_A_PMC0				0x000004C1U
 #define MSR_IA32_A_PMC1				0x000004C2U
 #define MSR_IA32_A_PMC2				0x000004C3U
diff --git a/hypervisor/include/arch/x86/vmx.h b/hypervisor/include/arch/x86/vmx.h
index 3f2636e26..a33ee2bd4 100644
--- a/hypervisor/include/arch/x86/vmx.h
+++ b/hypervisor/include/arch/x86/vmx.h
@@ -281,6 +281,7 @@
 #define VMX_PROCBASED_CTLS_RDTSC       (1U<<12U)
 #define VMX_PROCBASED_CTLS_CR3_LOAD    (1U<<15U)
 #define VMX_PROCBASED_CTLS_CR3_STORE   (1U<<16U)
+#define VMX_PROCBASED_CTLS_TERTIARY    (1U<<17U)
 #define VMX_PROCBASED_CTLS_CR8_LOAD    (1U<<19U)
 #define VMX_PROCBASED_CTLS_CR8_STORE   (1U<<20U)
 #define VMX_PROCBASED_CTLS_TPR_SHADOW  (1U<<21U)