KVM: Introduce CONFIG_HAVE_KVM_IRQ_ROUTING

Quite a bit of code in KVM has been conditionalized on availability of
IOAPIC emulation. However, most of it is generically applicable to
platforms that don't have an IOPIC, but a different type of irq chip.

Make code that only relies on IRQ routing, not an APIC itself, on
CONFIG_HAVE_KVM_IRQ_ROUTING, so that we can reuse it later.

Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>

5 files changed, 11 insertions, 7 deletions

diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 586f00059805..9d50efdb719d 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -29,6 +29,7 @@ config KVM
         select MMU_NOTIFIER
         select ANON_INODES
         select HAVE_KVM_IRQCHIP
+        select HAVE_KVM_IRQ_ROUTING
         select HAVE_KVM_EVENTFD
         select KVM_APIC_ARCHITECTURE
         select KVM_ASYNC_PF
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index bf3b1dcb8b3d..4215d4f3d86f 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -304,7 +304,7 @@ struct kvm_kernel_irq_routing_entry {
         struct hlist_node link;
 };
 
-#ifdef __KVM_HAVE_IOAPIC
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
 
 struct kvm_irq_routing_table {
         int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
@@ -432,7 +432,7 @@ 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
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
 int kvm_irqfd_init(void);
 void kvm_irqfd_exit(void);
 #else
@@ -957,7 +957,7 @@ static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq)
 }
 #endif
 
-#ifdef KVM_CAP_IRQ_ROUTING
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
 
 #define KVM_MAX_IRQ_ROUTES 1024
 
diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
index d01b24b72c61..779262f59e25 100644
--- a/virt/kvm/Kconfig
+++ b/virt/kvm/Kconfig
@@ -6,6 +6,9 @@ config HAVE_KVM
 config HAVE_KVM_IRQCHIP
        bool
 
+config HAVE_KVM_IRQ_ROUTING
+       bool
+
 config HAVE_KVM_EVENTFD
        bool
        select EVENTFD
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index c5d43ffbf1f3..64ee720b75c7 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -35,7 +35,7 @@
 
 #include "iodev.h"
 
-#ifdef __KVM_HAVE_IOAPIC
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
 /*
  * --------------------------------------------------------------------
  * irqfd: Allows an fd to be used to inject an interrupt to the guest
@@ -433,7 +433,7 @@ fail:
 void
 kvm_eventfd_init(struct kvm *kvm)
 {
-#ifdef __KVM_HAVE_IOAPIC
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
         spin_lock_init(&kvm->irqfds.lock);
         INIT_LIST_HEAD(&kvm->irqfds.items);
         INIT_LIST_HEAD(&kvm->irqfds.resampler_list);
@@ -442,7 +442,7 @@ kvm_eventfd_init(struct kvm *kvm)
         INIT_LIST_HEAD(&kvm->ioeventfds);
 }
 
-#ifdef __KVM_HAVE_IOAPIC
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
 /*
  * shutdown any irqfd's that match fd+gsi
  */
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index aaac1a7a9ea8..2c3b226bc13b 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2404,7 +2404,7 @@ static long kvm_dev_ioctl_check_extension_generic(long arg)
         case KVM_CAP_SIGNAL_MSI:
 #endif
                 return 1;
-#ifdef KVM_CAP_IRQ_ROUTING
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
         case KVM_CAP_IRQ_ROUTING:
                 return KVM_MAX_IRQ_ROUTES;
 #endif