diff --git a/lib/libvmmapi/amd64/vmmapi_machdep.c b/lib/libvmmapi/amd64/vmmapi_machdep.c
--- a/lib/libvmmapi/amd64/vmmapi_machdep.c
+++ b/lib/libvmmapi/amd64/vmmapi_machdep.c
@@ -71,6 +71,9 @@
 	VM_ISA_PULSE_IRQ,		\
 	VM_ISA_SET_IRQ_TRIGGER,		\
 	VM_INJECT_NMI,			\
+	VM_GET_CPUID,			\
+	VM_SET_CPUID,			\
+	VM_LEGACY_CPUID,		\
 	VM_SET_X2APIC_STATE,		\
 	VM_GET_X2APIC_STATE,		\
 	VM_GET_HPET_CAPABILITIES,	\
@@ -348,6 +351,37 @@
 	return (error);
 }
 
+int
+vm_get_cpuid(struct vcpu *vcpu, struct vm_vcpu_cpuid_config *cfg)
+{
+	int error;
+
+	error = vcpu_ioctl(vcpu, VM_GET_CPUID, cfg);
+
+	return (error);
+}
+
+int
+vm_set_cpuid(struct vcpu *vcpu, struct vm_vcpu_cpuid_config *cfg)
+{
+	int error;
+
+	error = vcpu_ioctl(vcpu, VM_SET_CPUID, cfg);
+
+	return (error);
+}
+
+int
+vm_legacy_cpuid(struct vcpu *vcpu, struct vm_legacy_cpuid *vlc)
+{
+	int error;
+
+	bzero(vlc, sizeof (*vlc));
+	error = vcpu_ioctl(vcpu, VM_LEGACY_CPUID, vlc);
+
+	return (error);
+}
+
 int
 vm_get_hpet_capabilities(struct vmctx *ctx, uint32_t *capabilities)
 {
diff --git a/lib/libvmmapi/vmmapi.h b/lib/libvmmapi/vmmapi.h
--- a/lib/libvmmapi/vmmapi.h
+++ b/lib/libvmmapi/vmmapi.h
@@ -228,7 +228,9 @@
 #ifdef __amd64__
 int	vm_get_x2apic_state(struct vcpu *vcpu, enum x2apic_state *s);
 int	vm_set_x2apic_state(struct vcpu *vcpu, enum x2apic_state s);
-
+int	vm_get_cpuid(struct vcpu *vcpu, struct vm_vcpu_cpuid_config *cfg);
+int	vm_set_cpuid(struct vcpu *vcpu, struct vm_vcpu_cpuid_config *cfg);
+int	vm_legacy_cpuid(struct vcpu *vcpu, struct vm_legacy_cpuid *vlc);
 int	vm_get_hpet_capabilities(struct vmctx *ctx, uint32_t *capabilities);
 
 /*