KVM: ARM: Move all vcpu init code into kvm_arch_vcpu_create()

Fold init() into create() now that the two are called back-to-back by
common KVM code (kvm_vcpu_init() calls kvm_arch_vcpu_init() as its last
action, and kvm_vm_ioctl_create_vcpu() calls kvm_arch_vcpu_create()
immediately thereafter).  This paves the way for removing
kvm_arch_vcpu_{un}init() entirely.

Note, there is no associated unwinding in kvm_arch_vcpu_uninit() that
needs to be relocated (to kvm_arch_vcpu_destroy()).

No functional change intended.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

virt/kvm/arm/arm.c

@@ -292,6 +292,25 @@ int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
 
 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 {
+	int err;
+
+	/* Force users to call KVM_ARM_VCPU_INIT */
+	vcpu->arch.target = -1;
+	bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
+
+	/* Set up the timer */
+	kvm_timer_vcpu_init(vcpu);
+
+	kvm_pmu_vcpu_init(vcpu);
+
+	kvm_arm_reset_debug_ptr(vcpu);
+
+	kvm_arm_pvtime_vcpu_init(&vcpu->arch);
+
+	err = kvm_vgic_vcpu_init(vcpu);
+	if (err)
+		return err;
+
 	return create_hyp_mappings(vcpu, vcpu + 1, PAGE_HYP);
 }
 
@@ -341,20 +360,7 @@ void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
 
 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 {
-	/* Force users to call KVM_ARM_VCPU_INIT */
-	vcpu->arch.target = -1;
-	bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
-
-	/* Set up the timer */
-	kvm_timer_vcpu_init(vcpu);
-
-	kvm_pmu_vcpu_init(vcpu);
-
-	kvm_arm_reset_debug_ptr(vcpu);
-
-	kvm_arm_pvtime_vcpu_init(&vcpu->arch);
-
-	return kvm_vgic_vcpu_init(vcpu);
+	return 0;
 }
 
 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)