commit 8e93cef14e6f32adf6914b30b096039e6264f0e3
author Paolo Bonzini <pbonzini@redhat.com> Fri Oct 21 22:48:08 2016 +0200
committer Michael S. Tsirkin <mst@redhat.com> Sun Oct 30 19:51:32 2016 +0200
tree abf77c2c554b5efcda21167689f61c9e04f4a0b2
parent ff4c07df67f098234d9e49850435ccb49b8cbbdc

virtio: introduce virtio_device_ioeventfd_enabled

This will be used to forbid iothread configuration when the
proxy does not allow using ioeventfd.  To simplify the implementation,
change the direction of the ioeventfd_disabled callback too.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/virtio/virtio-pci.c

diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index f00fc25..62001b4 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -262,11 +262,11 @@
     return 0;
 }
 
-static bool virtio_pci_ioeventfd_disabled(DeviceState *d)
+static bool virtio_pci_ioeventfd_enabled(DeviceState *d)
 {
     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
 
-    return !(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD);
+    return (proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) != 0;
 }
 
 #define QEMU_VIRTIO_PCI_QUEUE_MEM_MULT 0x1000
@@ -2516,7 +2516,7 @@
     k->device_plugged = virtio_pci_device_plugged;
     k->device_unplugged = virtio_pci_device_unplugged;
     k->query_nvectors = virtio_pci_query_nvectors;
-    k->ioeventfd_disabled = virtio_pci_ioeventfd_disabled;
+    k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled;
     k->ioeventfd_assign = virtio_pci_ioeventfd_assign;
 }