Re: [Qemu-devel] Help: Does Qemu support virtio-pci for net-device and disk device?

[Kevin Zhao <kevin.zhao@linaro.org>]

Great ~ Thanks for your valuable information~
I will try with the xml and any update I will post here.

On 18 August 2016 at 21:51, Andrea Bolognani <abologna@redhat.com> wrote:

> On Thu, 2016-08-18 at 20:43 +0800, Kevin Zhao wrote:
> > What's the minimum version of  Qemu that support virito-1.0?
> > Does Qemu 2.6 works?
>
> 2.6 definitely has virtio 1.0 support, however libvirt does
> not yet allow you to control whether a device uses 0.9, 1.0
> or both. The default for 2.6 should be both IIRC.
>
> > Now I will manually add the slots and bus to pcie. Because
> > I am not familiar with it,  if it convenient, could you give
> > me an available xml file which PCIE disk and PCIE
> > net device can work for machine virt ?
>
> The XML you're looking for is at the end of this message.
>
> Note that a Fedora 24 guest configured this way will not
> boot at all if the machine type is virt-2.6; on the other
> hand, an identically-configured RHEL 7.3 guest will boot
> even with virt-2.6, but both the disk and the network
> adapter will be legacy PCI instead of PCIe.
>
>
> <domain type='kvm'>
>   <name>abologna-f24</name>
>   <uuid>f6d0428b-a034-4c4e-8ef2-f12f6aa9cab0</uuid>
>   <memory unit='KiB'>2097152</memory>
>   <currentMemory unit='KiB'>2097152</currentMemory>
>   <vcpu placement='static'>4</vcpu>
>   <os>
>     <type arch='aarch64' machine='virt-2.7'>hvm</type>
>     <loader readonly='yes' type='pflash'>/usr/share/
> AAVMF/AAVMF_CODE.fd</loader>
>     <nvram>/var/lib/libvirt/qemu/nvram/abologna-f24_VARS.fd</nvram>
>     <boot dev='hd'/>
>   </os>
>   <features>
>     <gic version='2'/>
>   </features>
>   <cpu mode='host-passthrough'/>
>   <clock offset='utc'/>
>   <on_poweroff>destroy</on_poweroff>
>   <on_reboot>restart</on_reboot>
>   <on_crash>restart</on_crash>
>   <devices>
>     <emulator>/usr/libexec/abologna-qemu-kvm</emulator>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/abologna-f24.qcow2'/>
>       <target dev='vda' bus='virtio'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x00'
> function='0x0'/>
>     </disk>
>     <controller type='pci' index='0' model='pcie-root'/>
>     <controller type='pci' index='1' model='pcie-root-port'>
>       <model name='ioh3420'/>
>       <target chassis='1' port='0x8'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x0'/>
>     </controller>
>     <controller type='pci' index='2' model='pcie-root-port'>
>       <model name='ioh3420'/>
>       <target chassis='2' port='0x10'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x0'/>
>     </controller>
>     <controller type='virtio-serial' index='0'>
>       <address type='virtio-mmio'/>
>     </controller>
>     <interface type='network'>
>       <mac address='52:54:00:10:07:41'/>
>       <source network='default'/>
>       <model type='virtio'/>
>       <rom bar='off'/>
>       <address type='pci' domain='0x0000' bus='0x02' slot='0x00'
> function='0x0'/>
>     </interface>
>     <serial type='pty'>
>       <target port='0'/>
>     </serial>
>     <console type='pty'>
>       <target type='serial' port='0'/>
>     </console>
>     <channel type='unix'>
>       <source mode='bind'/>
>       <target type='virtio' name='org.qemu.guest_agent.0'/>
>       <address type='virtio-serial' controller='0' bus='0' port='1'/>
>     </channel>
>   </devices>
> </domain>
>
> --
> Andrea Bolognani / Red Hat / Virtualization
>