KVM: arm/arm64: vgic: Use wrapper function to lock/unlock all vcpus in kvm_vgic_create()

 */

int kvm_vgic_create(struct kvm *kvm, u32 type)

{

	int i, vcpu_lock_idx = -1, ret;

	int i, ret;

	struct kvm_vcpu *vcpu;

	if (irqchip_in_kernel(kvm))

		!kvm_vgic_global_state.can_emulate_gicv2)

		return -ENODEV;

	/*

	 * Any time a vcpu is run, vcpu_load is called which tries to grab the

	 * vcpu->mutex.  By grabbing the vcpu->mutex of all VCPUs we ensure

	 * that no other VCPUs are run while we create the vgic.

	 */

	ret = -EBUSY;

	kvm_for_each_vcpu(i, vcpu, kvm) {

		if (!mutex_trylock(&vcpu->mutex))

			goto out_unlock;

		vcpu_lock_idx = i;

	}

	if (!lock_all_vcpus(kvm))

		return ret;

	kvm_for_each_vcpu(i, vcpu, kvm) {

		if (vcpu->arch.has_run_once)

		INIT_LIST_HEAD(&kvm->arch.vgic.rd_regions);

out_unlock:

	for (; vcpu_lock_idx >= 0; vcpu_lock_idx--) {

		vcpu = kvm_get_vcpu(kvm, vcpu_lock_idx);

		mutex_unlock(&vcpu->mutex);

	}

	unlock_all_vcpus(kvm);

	return ret;

}