Re: [PATCH] qemu: Add default address type for vhost-user interface on aarch64

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On 12/14/18 10:19 AM, Wang Yechao wrote:
> on aarch64, hotadd vhost-user interface with the follow xml file:
> <interface type='vhostuser'>
>   <mac address='fa:16:3e:a2:e1:58'/>
>   <source type='unix' path='/var/run/vhu24a3f044-80' mode='server'/>
>   <target dev='vhu24a3f044-80'/>
>   <model type='virtio'/>
> </interface>
> 
> will get error like that:
> error: internal error: Nicdev support unavailable
> 
> Because there is no device address type specified in xml file, so
> qemuDomainSupportsNicdev returns 'false' when invoked in
> qemuDomainAttachNetDevice. Using pci as the default address type,
> and assigns pci address later in qemuDomainEnsurePCIAddress.
> 
> Signed-off-by: Wang Yechao <wang.yechao255@xxxxxxxxxx>
> ---
>  src/qemu/qemu_hotplug.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
> index 68d021a..c1464a9 100644
> --- a/src/qemu/qemu_hotplug.c
> +++ b/src/qemu/qemu_hotplug.c
> @@ -1443,6 +1443,11 @@ qemuDomainAttachNetDevice(virQEMUDriverPtr driver,
>          queueSize = net->driver.virtio.queues;
>          if (!queueSize)
>              queueSize = 1;
> +
> +        if (!net->info.type &&
> +            vm->def->os.arch == VIR_ARCH_AARCH64)
> +            net->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI;

This is almost certainly incorrect. At this point, the address should
have been already assigned. Maybe you need to look into why it wasn't.

Michal

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