[Qemu-devel] [PATCH-RFC 04/13] virtio-pci: fill in irqfd/queufd support

[Michael S. Tsirkin]

Support irqfd/queuefd. The last one only with kvm, that's
okay because vhost relies on kvm anyway.

Signed-off-by: Michael S. Tsirkin <address@hidden>
---
 hw/virtio-pci.c |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index 6d0f9dd..5a3be6b 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -23,6 +23,7 @@
 #include "msix.h"
 #include "net.h"
 #include "loader.h"
+#include "kvm.h"
 
 /* from Linux's linux/virtio_pci.h */
 
@@ -388,6 +389,29 @@ static unsigned virtio_pci_get_features(void *opaque)
     return proxy->host_features;
 }
 
+static void virtio_pci_irqfd_read(void *opaque)
+{
+    VirtQueue *vq = opaque;
+    virtio_irq(vq->vdev, vq);
+}
+
+static int virtio_pci_irqfd(void * opaque, int n, int fd, bool assign)
+{
+    VirtIOPCIProxy *proxy = opaque;
+    VirtQueue *vq = &proxy->vdev->vq[n];
+
+    qemu_set_fd_handler(fd, assign ? virtio_pci_irqfd_read : NULL, NULL, vq);
+    return 0;
+}
+
+static int virtio_pci_queuefd(void * opaque, int n, int fd, bool assign)
+{
+    VirtIOPCIProxy *proxy = opaque;
+    return kvm_set_ioeventfd(proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
+                             n, fd, assign);
+}
+
+
 static const VirtIOBindings virtio_pci_bindings = {
     .notify = virtio_pci_notify,
     .save_config = virtio_pci_save_config,
@@ -395,6 +419,8 @@ static const VirtIOBindings virtio_pci_bindings = {
     .save_queue = virtio_pci_save_queue,
     .load_queue = virtio_pci_load_queue,
     .get_features = virtio_pci_get_features,
+    .set_irqfd = virtio_pci_irqfd,
+    .set_queuefd = virtio_pci_queuefd,
 };
 
 static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev,
-- 
1.6.6.rc1.43.gf55cc