KVM: remove CONFIG_HAVE_KVM_IRQFD

All platforms with a kernel irqchip have support for irqfd.  Unify the
two configuration items so that userspace can expect to use irqfd to
inject interrupts into the irqchip.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/arm64/kvm/Kconfig

@@ -29,7 +29,6 @@ menuconfig KVM
 	select KVM_GENERIC_DIRTYLOG_READ_PROTECT
 	select KVM_XFER_TO_GUEST_WORK
 	select KVM_VFIO
-	select HAVE_KVM_IRQFD
 	select HAVE_KVM_DIRTY_RING_ACQ_REL
 	select NEED_KVM_DIRTY_RING_WITH_BITMAP
 	select HAVE_KVM_MSI

arch/powerpc/kvm/Kconfig

@@ -224,7 +224,6 @@ config KVM_MPIC
 	bool "KVM in-kernel MPIC emulation"
 	depends on KVM && PPC_E500
 	select HAVE_KVM_IRQCHIP
-	select HAVE_KVM_IRQFD
 	select HAVE_KVM_IRQ_ROUTING
 	select HAVE_KVM_MSI
 	help
@@ -237,7 +236,6 @@ config KVM_XICS
 	bool "KVM in-kernel XICS emulation"
 	depends on KVM_BOOK3S_64 && !KVM_MPIC
 	select HAVE_KVM_IRQCHIP
-	select HAVE_KVM_IRQFD
 	default y
 	help
 	  Include support for the XICS (eXternal Interrupt Controller

arch/powerpc/kvm/powerpc.c

@@ -578,7 +578,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 		break;
 #endif
 
-#ifdef CONFIG_HAVE_KVM_IRQFD
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
 	case KVM_CAP_IRQFD_RESAMPLE:
 		r = !xive_enabled();
 		break;

arch/riscv/kvm/Kconfig

@@ -21,7 +21,6 @@ config KVM
 	tristate "Kernel-based Virtual Machine (KVM) support (EXPERIMENTAL)"
 	depends on RISCV_SBI && MMU
 	select HAVE_KVM_IRQCHIP
-	select HAVE_KVM_IRQFD
 	select HAVE_KVM_IRQ_ROUTING
 	select HAVE_KVM_MSI
 	select HAVE_KVM_VCPU_ASYNC_IOCTL

arch/s390/kvm/Kconfig

@@ -26,7 +26,6 @@ config KVM
 	select KVM_ASYNC_PF
 	select KVM_ASYNC_PF_SYNC
 	select HAVE_KVM_IRQCHIP
-	select HAVE_KVM_IRQFD
 	select HAVE_KVM_IRQ_ROUTING
 	select HAVE_KVM_INVALID_WAKEUPS
 	select HAVE_KVM_NO_POLL

arch/x86/kvm/Kconfig

@@ -27,7 +27,6 @@ config KVM
 	select KVM_GENERIC_MMU_NOTIFIER
 	select HAVE_KVM_IRQCHIP
 	select HAVE_KVM_PFNCACHE
-	select HAVE_KVM_IRQFD
 	select HAVE_KVM_DIRTY_RING_TSO
 	select HAVE_KVM_DIRTY_RING_ACQ_REL
 	select IRQ_BYPASS_MANAGER

include/linux/kvm_host.h

@@ -805,8 +805,7 @@ struct kvm {
 	 * Update side is protected by irq_lock.
 	 */
 	struct kvm_irq_routing_table __rcu *irq_routing;
-#endif
-#ifdef CONFIG_HAVE_KVM_IRQFD
+
 	struct hlist_head irq_ack_notifier_list;
 #endif
 
@@ -996,7 +995,7 @@ static inline void kvm_arch_post_irq_routing_update(struct kvm *kvm)
 }
 #endif
 
-#ifdef CONFIG_HAVE_KVM_IRQFD
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
 int kvm_irqfd_init(void);
 void kvm_irqfd_exit(void);
 #else
@@ -2057,7 +2056,7 @@ int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
 void kvm_eventfd_init(struct kvm *kvm);
 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 
-#ifdef CONFIG_HAVE_KVM_IRQFD
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
 void kvm_irqfd_release(struct kvm *kvm);
 bool kvm_notify_irqfd_resampler(struct kvm *kvm,
@@ -2078,7 +2077,7 @@ static inline bool kvm_notify_irqfd_resampler(struct kvm *kvm,
 {
 	return false;
 }
-#endif /* CONFIG_HAVE_KVM_IRQFD */
+#endif /* CONFIG_HAVE_KVM_IRQCHIP */
 
 void kvm_arch_irq_routing_update(struct kvm *kvm);
 

include/trace/events/kvm.h

@@ -62,7 +62,7 @@ TRACE_EVENT(kvm_vcpu_wakeup,
 		  __entry->valid ? "valid" : "invalid")
 );
 
-#if defined(CONFIG_HAVE_KVM_IRQFD)
+#if defined(CONFIG_HAVE_KVM_IRQCHIP)
 TRACE_EVENT(kvm_set_irq,
 	TP_PROTO(unsigned int gsi, int level, int irq_source_id),
 	TP_ARGS(gsi, level, irq_source_id),
@@ -82,7 +82,7 @@ TRACE_EVENT(kvm_set_irq,
 	TP_printk("gsi %u level %d source %d",
 		  __entry->gsi, __entry->level, __entry->irq_source_id)
 );
-#endif /* defined(CONFIG_HAVE_KVM_IRQFD) */
+#endif /* defined(CONFIG_HAVE_KVM_IRQCHIP) */
 
 #if defined(__KVM_HAVE_IOAPIC)
 #define kvm_deliver_mode		\
@@ -170,7 +170,7 @@ TRACE_EVENT(kvm_msi_set_irq,
 
 #endif /* defined(__KVM_HAVE_IOAPIC) */
 
-#if defined(CONFIG_HAVE_KVM_IRQFD)
+#if defined(CONFIG_HAVE_KVM_IRQCHIP)
 
 #ifdef kvm_irqchips
 #define kvm_ack_irq_string "irqchip %s pin %u"
@@ -197,7 +197,7 @@ TRACE_EVENT(kvm_ack_irq,
 	TP_printk(kvm_ack_irq_string, kvm_ack_irq_parm)
 );
 
-#endif /* defined(CONFIG_HAVE_KVM_IRQFD) */
+#endif /* defined(CONFIG_HAVE_KVM_IRQCHIP) */
 
 
 

virt/kvm/Kconfig

@@ -11,9 +11,6 @@ config HAVE_KVM_PFNCACHE
 config HAVE_KVM_IRQCHIP
        bool
 
-config HAVE_KVM_IRQFD
-       bool
-
 config HAVE_KVM_IRQ_ROUTING
        bool
 

virt/kvm/eventfd.c

@@ -28,7 +28,7 @@
 
 #include <kvm/iodev.h>
 
-#ifdef CONFIG_HAVE_KVM_IRQFD
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
 
 static struct workqueue_struct *irqfd_cleanup_wq;
 
@@ -531,7 +531,7 @@ void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
 void
 kvm_eventfd_init(struct kvm *kvm)
 {
-#ifdef CONFIG_HAVE_KVM_IRQFD
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
 	spin_lock_init(&kvm->irqfds.lock);
 	INIT_LIST_HEAD(&kvm->irqfds.items);
 	INIT_LIST_HEAD(&kvm->irqfds.resampler_list);
@@ -540,7 +540,7 @@ kvm_eventfd_init(struct kvm *kvm)
 	INIT_LIST_HEAD(&kvm->ioeventfds);
 }
 
-#ifdef CONFIG_HAVE_KVM_IRQFD
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
 /*
  * shutdown any irqfd's that match fd+gsi
  */

virt/kvm/kvm_main.c

@@ -1273,7 +1273,7 @@ static struct kvm *kvm_create_vm(unsigned long type, const char *fdname)
 	if (r)
 		goto out_err_no_disable;
 
-#ifdef CONFIG_HAVE_KVM_IRQFD
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
 	INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list);
 #endif
 
@@ -4826,7 +4826,7 @@ static int kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
 #ifdef CONFIG_HAVE_KVM_MSI
 	case KVM_CAP_SIGNAL_MSI:
 #endif
-#ifdef CONFIG_HAVE_KVM_IRQFD
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
 	case KVM_CAP_IRQFD:
 #endif
 	case KVM_CAP_IOEVENTFD_ANY_LENGTH: