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authorPaul Mackerras <paulus@samba.org>2014-06-30 20:51:13 +1000
committerPaolo Bonzini <pbonzini@redhat.com>2014-08-05 14:26:28 +0200
commit297e21053a52f060944e9f0de4c64fad9bcd72fc (patch)
tree9ee54fbee84f31d76ac02db4639b044f92a24051
parente4d57e1ee1ab59f0cef0272800ac6c52e0ec814a (diff)
downloadlinux-linaro-stable-297e21053a52f060944e9f0de4c64fad9bcd72fc.tar.gz
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>
-rw-r--r--arch/ia64/kvm/Kconfig1
-rw-r--r--arch/powerpc/kvm/Kconfig1
-rw-r--r--arch/s390/kvm/Kconfig1
-rw-r--r--arch/x86/kvm/Kconfig1
-rw-r--r--include/linux/kvm_host.h8
-rw-r--r--virt/kvm/Kconfig3
-rw-r--r--virt/kvm/eventfd.c6
-rw-r--r--virt/kvm/kvm_main.c2
8 files changed, 15 insertions, 8 deletions
diff --git a/arch/ia64/kvm/Kconfig b/arch/ia64/kvm/Kconfig
index 990b86420cc6..3d50ea955c4c 100644
--- 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 8f104a6879f0..d4741dba91af 100644
--- 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 10d529ac9821..646db9c467d1 100644
--- 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 287e4c85fff9..f9d16ff56c6b 100644
--- 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 ddd33e1aeee1..8593d2e61cbf 100644
--- 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 13f2d19793e3..fc0c5e603eb4 100644
--- 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 99957df69cf2..f5f61548f60d 100644
--- 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 1b95cc926cfc..a69a623938b8 100644
--- 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: