KVM: Give IRQFD its own separate enabling Kconfig option

Currently, the IRQFD code is conditional on CONFIG_HAVE_KVM_IRQ_ROUTING.
So that we can have the IRQFD code compiled in without having the
IRQ routing code, this creates a new CONFIG_HAVE_KVM_IRQFD, makes
the IRQFD code conditional on it instead of CONFIG_HAVE_KVM_IRQ_ROUTING,
and makes all the platforms that currently select HAVE_KVM_IRQ_ROUTING
also select HAVE_KVM_IRQFD.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Tested-by: Eric Auger <eric.auger@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/ia64/kvm/Kconfig b/arch/ia64/kvm/Kconfig
index 990b864..3d50ea9 100644 (file)
--- a/arch/ia64/kvm/Kconfig
+++ b/arch/ia64/kvm/Kconfig
@@ -25,6 +25,7 @@ config KVM
        select PREEMPT_NOTIFIERS
        select ANON_INODES
        select HAVE_KVM_IRQCHIP
+       select HAVE_KVM_IRQFD
        select HAVE_KVM_IRQ_ROUTING
        select KVM_APIC_ARCHITECTURE
        select KVM_MMIO

diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index 8f104a6..d4741db 100644 (file)
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -158,6 +158,7 @@ config KVM_MPIC
        bool "KVM in-kernel MPIC emulation"
        depends on KVM && E500
        select HAVE_KVM_IRQCHIP
+       select HAVE_KVM_IRQFD
        select HAVE_KVM_IRQ_ROUTING
        select HAVE_KVM_MSI
        help

diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/Kconfig
index 10d529a..646db9c 100644 (file)
--- a/arch/s390/kvm/Kconfig
+++ b/arch/s390/kvm/Kconfig
@@ -26,6 +26,7 @@ config KVM
        select KVM_ASYNC_PF
        select KVM_ASYNC_PF_SYNC
        select HAVE_KVM_IRQCHIP
+       select HAVE_KVM_IRQFD
        select HAVE_KVM_IRQ_ROUTING
        ---help---
          Support hosting paravirtualized guest machines using the SIE

diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 287e4c8..f9d16ff 100644 (file)
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -27,6 +27,7 @@ config KVM
        select MMU_NOTIFIER
        select ANON_INODES
        select HAVE_KVM_IRQCHIP
+       select HAVE_KVM_IRQFD
        select HAVE_KVM_IRQ_ROUTING
        select HAVE_KVM_EVENTFD
        select KVM_APIC_ARCHITECTURE

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ddd33e1..8593d2e 100644 (file)
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -437,7 +437,7 @@ 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 CONFIG_HAVE_KVM_IRQ_ROUTING
+#ifdef CONFIG_HAVE_KVM_IRQFD
 int kvm_irqfd_init(void);
 void kvm_irqfd_exit(void);
 #else
@@ -932,20 +932,20 @@ int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
                          const struct kvm_irq_routing_entry *ue);
 void kvm_free_irq_routing(struct kvm *kvm);
 
-int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
-
 #else
 
 static inline void kvm_free_irq_routing(struct kvm *kvm) {}
 
 #endif
 
+int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
+
 #ifdef CONFIG_HAVE_KVM_EVENTFD
 
 void kvm_eventfd_init(struct kvm *kvm);
 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
 
-#ifdef CONFIG_HAVE_KVM_IRQCHIP
+#ifdef CONFIG_HAVE_KVM_IRQFD
 int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
 void kvm_irqfd_release(struct kvm *kvm);
 void kvm_irq_routing_update(struct kvm *);

diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
index 13f2d19..fc0c5e6 100644 (file)
--- a/virt/kvm/Kconfig
+++ b/virt/kvm/Kconfig
@@ -6,6 +6,9 @@ config HAVE_KVM
 config HAVE_KVM_IRQCHIP
        bool
 
+config HAVE_KVM_IRQFD
+       bool
+
 config HAVE_KVM_IRQ_ROUTING
        bool
 

diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index 99957df..f5f6154 100644 (file)
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -39,7 +39,7 @@
 #include "irq.h"
 #include "iodev.h"
 
-#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
+#ifdef CONFIG_HAVE_KVM_IRQFD
 /*
  * --------------------------------------------------------------------
  * irqfd: Allows an fd to be used to inject an interrupt to the guest
@@ -450,7 +450,7 @@ out:
 void
 kvm_eventfd_init(struct kvm *kvm)
 {
-#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
+#ifdef CONFIG_HAVE_KVM_IRQFD
        spin_lock_init(&kvm->irqfds.lock);
        INIT_LIST_HEAD(&kvm->irqfds.items);
        INIT_LIST_HEAD(&kvm->irqfds.resampler_list);
@@ -459,7 +459,7 @@ kvm_eventfd_init(struct kvm *kvm)
        INIT_LIST_HEAD(&kvm->ioeventfds);
 }
 
-#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
+#ifdef CONFIG_HAVE_KVM_IRQFD
 /*
  * shutdown any irqfd's that match fd+gsi
  */

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 1b95cc9..a69a623 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2337,7 +2337,7 @@ static long 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_IRQ_ROUTING
+#ifdef CONFIG_HAVE_KVM_IRQFD
        case KVM_CAP_IRQFD_RESAMPLE:
 #endif
        case KVM_CAP_CHECK_EXTENSION_VM: