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Re: [libvirt] [PATCH] pci address conflict when virtio disk with drive type address

On 10/18/2011 03:30 AM, Xu He Jie wrote:
When using the xml as below:

     <memballoon model='virtio'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>


Then can't statup qemu, the error message as below:
qemu-system-x86_64: -device virtio-balloon-pci,id=balloon0,bus=pci.0,multifunction=on,addr=0x3.0x0: Device 'virtio-balloon-pci' could not be initialized

The XML doesn't match the error message (slot 4 vs. slot 3); are you sure you got this right?

Adding check for bus type and address type. Only the address of pci type support by virtio bus.

Signed-off-by: Xu He Jie<xuhj linux vnet ibm com>
  src/conf/domain_conf.c |    8 ++++++++
  1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 5959593..b8aa1a2 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -2644,6 +2644,14 @@ virDomainDiskDefParseXML(virCapsPtr caps,
      } else {
          if (virDomainDeviceInfoParseXML(node,&def->info, flags)<  0)
              goto error;
+        if ((def->bus ==  VIR_DOMAIN_DISK_BUS_VIRTIO)&&
+              (def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)&&
+              (def->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE)) {
+            virDomainReportError(VIR_ERR_INTERNAL_ERROR,
+                               _("virtio only support device address type 'PCI' "));
+            goto error;
+        }

This feels like the wrong place for the fix. I think the check should be in the qemu layer, not in the generic domain_conf, as there might be hypervisor drivers that support virtio on other buses.

Eric Blake   eblake redhat com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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