[Qemu-devel] [PATCH] virtio-pci: get config on init

[Qemu-devel] [PATCH] virtio-pci: get config on init

[Michael S. Tsirkin]

We originally did get config on map, so that
following write accesses are done on an updated config.
New memory API doesn't give us a callback
on map, and arguably, devices don't know when
cpu really can access there. So updating on
init seems cleaner.

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

OK, this should go on Avi's branch and the memory
API can go on top.

 hw/virtio-pci.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index 4f770fe..afae846 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -507,9 +507,6 @@ static void virtio_map(PCIDevice *pci_dev, int region_num,
     register_ioport_read(addr, config_len, 1, virtio_pci_config_readb, proxy);
     register_ioport_read(addr, config_len, 2, virtio_pci_config_readw, proxy);
     register_ioport_read(addr, config_len, 4, virtio_pci_config_readl, proxy);
-
-    if (vdev->config_len)
-        vdev->get_config(vdev, vdev->config);
 }
 
 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
@@ -689,6 +686,10 @@ void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
     proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
     proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
     proxy->host_features = vdev->get_features(vdev, proxy->host_features);
+
+    if (vdev->config_len) {
+        vdev->get_config(vdev, vdev->config);
+    }
 }
 
 static int virtio_blk_init_pci(PCIDevice *pci_dev)
-- 
1.7.5.53.gc233e