[18/20] kvm: irqfd support

Commit Message

Michael S. Tsirkin Feb. 4, 2010, 3:29 p.m. UTC

None

Patch

diff --git a/kvm-all.c b/kvm-all.c
index 6dbe480..3c692f6 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1154,4 +1154,23 @@  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 365d8b1..e762a5b 100644
--- a/kvm.h
+++ b/kvm.h
@@ -159,4 +159,14 @@  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