Add API to assign/deassign irqfd to kvm.

Add stub so that users do not have to use

ifdefs.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

---

 kvm-all.c |   19 +++++++++++++++++++

 kvm.h     |   10 ++++++++++

 2 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/kvm-all.c b/kvm-all.c

index efdf40c..b3fdf29 100644

--- a/kvm-all.c

+++ b/kvm-all.c

@@ -1122,4 +1122,23 @@ int kvm_set_ioeventfd(uint16_t addr, uint16_t data, int fd, bool assigned)

 }

 #endif

+#if defined(KVM_IRQFD)

+int kvm_set_irqfd(int gsi, int fd, bool assigned)

+{

+    struct kvm_irqfd irqfd = {

+        .fd = fd,

+        .gsi = gsi,

+        .flags = assigned ? 0 : KVM_IRQFD_FLAG_DEASSIGN,

+    };

+    int r;

+    if (!kvm_irqchip_in_kernel())

+        return -ENOSYS;

+

+    r = kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd);

+    if (r < 0)

+        return r;

+    return 0;

+}

+#endif

+

 #include "qemu-kvm.c"

diff --git a/kvm.h b/kvm.h

index e98b5c8..ad8d122 100644

--- a/kvm.h

+++ b/kvm.h

@@ -167,4 +167,14 @@ int kvm_set_ioeventfd(uint16_t data, uint16_t addr, int fd, bool assigned)

 }

 #endif

+#if defined(KVM_IRQFD) && defined(CONFIG_KVM)

+int kvm_set_irqfd(int gsi, int fd, bool assigned);

+#else

+static inline

+int kvm_set_irqfd(int gsi, int fd, bool assigned)

+{

+    return -ENOSYS;

+}

+#endif

+

 #endif

-- 

1.6.6.144.g5c3af