Reduce Kconfig code duplication.
Signed-off-by: Avi Kivity <avi@redhat.com>
 #
 # KVM configuration
 #
-config HAVE_KVM
-       bool
 
-config HAVE_KVM_IRQCHIP
-       bool
-       default y
+source "virt/kvm/Kconfig"
 
 menuconfig VIRTUALIZATION
        bool "Virtualization"
        depends on PCI
        select PREEMPT_NOTIFIERS
        select ANON_INODES
+       select HAVE_KVM_IRQCHIP
        ---help---
          Support hosting fully virtualized guest machines using hardware
          virtualization extensions.  You will need a fairly recent
 
 # KVM configuration
 #
 
-config HAVE_KVM_IRQCHIP
-       bool
+source "virt/kvm/Kconfig"
 
 menuconfig VIRTUALIZATION
        bool "Virtualization"
 
 #
 # KVM configuration
 #
-config HAVE_KVM
-       bool
-
-config HAVE_KVM_IRQCHIP
-       bool
+source "virt/kvm/Kconfig"
 
 menuconfig VIRTUALIZATION
        bool "Virtualization"
 
 #
 # KVM configuration
 #
-config HAVE_KVM
-       bool
 
-config HAVE_KVM_IRQCHIP
-       bool
-       default y
+source "virt/kvm/Kconfig"
 
 menuconfig VIRTUALIZATION
        bool "Virtualization"
        select PREEMPT_NOTIFIERS
        select MMU_NOTIFIER
        select ANON_INODES
+       select HAVE_KVM_IRQCHIP
        ---help---
          Support hosting fully virtualized guest machines using hardware
          virtualization extensions.  You will need a fairly recent
 
--- /dev/null
+# KVM common configuration items and defaults
+
+config HAVE_KVM
+       bool
+
+config HAVE_KVM_IRQCHIP
+       bool