[PATCHv6,2/4] kvm: irqfd support

Commit Message

Michael S. Tsirkin March 17, 2010, 1:04 p.m. UTC

None

Patch

diff --git a/kvm-all.c b/kvm-all.c
index 7b05462..1a15662 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1200,5 +1200,24 @@  int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign)
 }
 #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_enabled() || !kvm_irqchip_in_kernel())
+        return -ENOSYS;
+
+    r = kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd);
+    if (r < 0)
+        return r;
+    return 0;
+}
+#endif
+
 #undef PAGE_SIZE
 #include "qemu-kvm.c"
diff --git a/kvm.h b/kvm.h
index 0951380..72dcaca 100644
--- a/kvm.h
+++ b/kvm.h
@@ -180,4 +180,14 @@  int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign)
 }
 #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