KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_get_mpstate

Move vcpu_load() and vcpu_put() into the architecture specific
implementations of kvm_arch_vcpu_ioctl_get_mpstate().
Reviewed-by: NDavid Hildenbrand <david@redhat.com>
Signed-off-by: NChristoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: NCornelia Huck <cohuck@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/s390/kvm/kvm-s390.c

@@ -2833,9 +2833,16 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 				    struct kvm_mp_state *mp_state)
 {
+	int ret;
+
+	vcpu_load(vcpu);
+
 	/* CHECK_STOP and LOAD are not supported yet */
-	return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
-				       KVM_MP_STATE_OPERATING;
+	ret = is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED :
+				      KVM_MP_STATE_OPERATING;
+
+	vcpu_put(vcpu);
+	return ret;
 }
 
 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,

arch/x86/kvm/x86.c

@@ -7465,6 +7465,8 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 				    struct kvm_mp_state *mp_state)
 {
+	vcpu_load(vcpu);
+
 	kvm_apic_accept_events(vcpu);
 	if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED &&
 					vcpu->arch.pv.pv_unhalted)
@@ -7472,6 +7474,7 @@ int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 	else
 		mp_state->mp_state = vcpu->arch.mp_state;
 
+	vcpu_put(vcpu);
 	return 0;
 }
 

virt/kvm/arm/arm.c

@@ -381,11 +381,14 @@ static void vcpu_power_off(struct kvm_vcpu *vcpu)
 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 				    struct kvm_mp_state *mp_state)
 {
+	vcpu_load(vcpu);
+
 	if (vcpu->arch.power_off)
 		mp_state->mp_state = KVM_MP_STATE_STOPPED;
 	else
 		mp_state->mp_state = KVM_MP_STATE_RUNNABLE;
 
+	vcpu_put(vcpu);
 	return 0;
 }
 

virt/kvm/kvm_main.c

@@ -2634,9 +2634,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
 	case KVM_GET_MP_STATE: {
 		struct kvm_mp_state mp_state;
 
-		vcpu_load(vcpu);
 		r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state);
-		vcpu_put(vcpu);
 		if (r)
 			goto out;
 		r = -EFAULT;