kvm: x86: move ioapic.c and irq_comm.c back to arch/x86/

ia64 does not need them anymore.  Ack notifiers become x86-specific
too.

Suggested-by: Gleb Natapov <gleb@kernel.org>
Reviewed-by: Radim Krcmar <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/include/asm/kvm_host.h

@@ -603,6 +603,9 @@ struct kvm_arch {
 
 	struct kvm_xen_hvm_config xen_hvm_config;
 
+	/* reads protected by irq_srcu, writes by irq_lock */
+	struct hlist_head mask_notifier_list;
+
 	/* fields used by HYPER-V emulation */
 	u64 hv_guest_os_id;
 	u64 hv_hypercall;
@@ -819,6 +822,19 @@ int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
 			  const void *val, int bytes);
 u8 kvm_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
 
+struct kvm_irq_mask_notifier {
+	void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
+	int irq;
+	struct hlist_node link;
+};
+
+void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
+				    struct kvm_irq_mask_notifier *kimn);
+void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
+				      struct kvm_irq_mask_notifier *kimn);
+void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
+			     bool mask);
+
 extern bool tdp_enabled;
 
 u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu);

arch/x86/kvm/Makefile

@@ -7,14 +7,13 @@ CFLAGS_vmx.o := -I.
 
 KVM := ../../../virt/kvm
 
-kvm-y			+= $(KVM)/kvm_main.o $(KVM)/ioapic.o \
-				$(KVM)/coalesced_mmio.o $(KVM)/irq_comm.o \
+kvm-y			+= $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o \
 				$(KVM)/eventfd.o $(KVM)/irqchip.o $(KVM)/vfio.o
 kvm-$(CONFIG_KVM_DEVICE_ASSIGNMENT)	+= $(KVM)/assigned-dev.o $(KVM)/iommu.o
 kvm-$(CONFIG_KVM_ASYNC_PF)	+= $(KVM)/async_pf.o
 
 kvm-y			+= x86.o mmu.o emulate.o i8259.o irq.o lapic.o \
-			   i8254.o cpuid.o pmu.o
+			   i8254.o ioapic.o irq_comm.o cpuid.o pmu.o
 kvm-intel-y		+= vmx.o
 kvm-amd-y		+= svm.o
 

arch/x86/kvm/ioapic.h

@@ -96,7 +96,6 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
 		struct kvm_lapic_irq *irq, unsigned long *dest_map);
 int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
-void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);
 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap,
 			u32 *tmr);
 

arch/x86/kvm/irq_comm.c

@@ -234,7 +234,7 @@ void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
 {
 	mutex_lock(&kvm->irq_lock);
 	kimn->irq = irq;
-	hlist_add_head_rcu(&kimn->link, &kvm->mask_notifier_list);
+	hlist_add_head_rcu(&kimn->link, &kvm->arch.mask_notifier_list);
 	mutex_unlock(&kvm->irq_lock);
 }
 
@@ -256,7 +256,7 @@ void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
 	idx = srcu_read_lock(&kvm->irq_srcu);
 	gsi = kvm_irq_map_chip_pin(kvm, irqchip, pin);
 	if (gsi != -1)
-		hlist_for_each_entry_rcu(kimn, &kvm->mask_notifier_list, link)
+		hlist_for_each_entry_rcu(kimn, &kvm->arch.mask_notifier_list, link)
 			if (kimn->irq == gsi)
 				kimn->func(kimn, mask);
 	srcu_read_unlock(&kvm->irq_srcu, idx);

arch/x86/kvm/x86.c

@@ -7264,6 +7264,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 	if (type)
 		return -EINVAL;
 
+	INIT_HLIST_HEAD(&kvm->arch.mask_notifier_list);
 	INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
 	INIT_LIST_HEAD(&kvm->arch.zapped_obsolete_pages);
 	INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);

include/linux/kvm_host.h

@@ -395,7 +395,6 @@ struct kvm {
 	 * Update side is protected by irq_lock.
 	 */
 	struct kvm_irq_routing_table __rcu *irq_routing;
-	struct hlist_head mask_notifier_list;
 #endif
 #ifdef CONFIG_HAVE_KVM_IRQFD
 	struct hlist_head irq_ack_notifier_list;
@@ -447,6 +446,14 @@ void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
 int __must_check vcpu_load(struct kvm_vcpu *vcpu);
 void vcpu_put(struct kvm_vcpu *vcpu);
 
+#ifdef __KVM_HAVE_IOAPIC
+void kvm_vcpu_request_scan_ioapic(struct kvm *kvm);
+#else
+static inline void kvm_vcpu_request_scan_ioapic(struct kvm *kvm)
+{
+}
+#endif
+
 #ifdef CONFIG_HAVE_KVM_IRQFD
 int kvm_irqfd_init(void);
 void kvm_irqfd_exit(void);
@@ -736,19 +743,6 @@ struct kvm_assigned_dev_kernel {
 	struct pci_saved_state *pci_saved_state;
 };
 
-struct kvm_irq_mask_notifier {
-	void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
-	int irq;
-	struct hlist_node link;
-};
-
-void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
-				    struct kvm_irq_mask_notifier *kimn);
-void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
-				      struct kvm_irq_mask_notifier *kimn);
-void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
-			     bool mask);
-
 int kvm_irq_map_gsi(struct kvm *kvm,
 		    struct kvm_kernel_irq_routing_entry *entries, int gsi);
 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin);

virt/kvm/eventfd.c

@@ -36,9 +36,6 @@
 #include <linux/seqlock.h>
 #include <trace/events/kvm.h>
 
-#ifdef __KVM_HAVE_IOAPIC
-#include "ioapic.h"
-#endif
 #include "iodev.h"
 
 #ifdef CONFIG_HAVE_KVM_IRQFD
@@ -492,9 +489,7 @@ void kvm_register_irq_ack_notifier(struct kvm *kvm,
 	mutex_lock(&kvm->irq_lock);
 	hlist_add_head_rcu(&kian->link, &kvm->irq_ack_notifier_list);
 	mutex_unlock(&kvm->irq_lock);
-#ifdef __KVM_HAVE_IOAPIC
 	kvm_vcpu_request_scan_ioapic(kvm);
-#endif
 }
 
 void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
@@ -504,9 +499,7 @@ void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 	hlist_del_init_rcu(&kian->link);
 	mutex_unlock(&kvm->irq_lock);
 	synchronize_srcu(&kvm->irq_srcu);
-#ifdef __KVM_HAVE_IOAPIC
 	kvm_vcpu_request_scan_ioapic(kvm);
-#endif
 }
 #endif
 

virt/kvm/kvm_main.c

@@ -468,9 +468,6 @@ static struct kvm *kvm_create_vm(unsigned long type)
 	if (r)
 		goto out_err_no_disable;
 
-#ifdef CONFIG_HAVE_KVM_IRQCHIP
-	INIT_HLIST_HEAD(&kvm->mask_notifier_list);
-#endif
 #ifdef CONFIG_HAVE_KVM_IRQFD
 	INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list);
 #endif