Hi, Andrew,
I tried rebuilding virtinst (1.3.2), but that made no difference.
However, changing "model=virtio-net-pci" to simply "model=virtio" (and letting
the default kick in via libvirt)
made a whole lot of difference (see domain xml at the end).
The interfaces are now on separate buses, all 4 work as expected, and the
virtio legacy disable is no longer needed.
I am a bit curious what goes wrong with the original XML, but not that much to
investigate it further.
Thank you,
Alex
New domain XML
---
<domain type='kvm' id='38'>
<name>cfg01</name>
<uuid>e4489f63-34a3-47f7-88c6-f6fb60a2aac0</uuid>
<memory unit='KiB'>4194304</memory>
<currentMemory unit='KiB'>4194304</currentMemory>
<vcpu placement='static'>6</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='aarch64' machine='virt-2.9'>hvm</type>
<loader readonly='yes' type='pflash'>/usr/share/AAVMF/AAVMF_CODE.fd</loader>
<nvram>/var/lib/libvirt/qemu/nvram/cfg01_VARS.fd</nvram>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<gic version='3'/>
</features>
<cpu mode='host-passthrough' check='none'/>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='none' io='native'/>
<source
file='/home/jenkins/alav/armband/upstream/fuel/mcp/scripts/images/mcp_cfg01.qcow2'/>
<backingStore/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x06' slot='0x00'
function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source
file='/home/jenkins/alav/armband/upstream/fuel/mcp/scripts/images/mcp_cfg01.iso'/>
<backingStore/>
<target dev='sda' bus='scsi'/>
<readonly/>
<alias name='scsi0-0-0-0'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='scsi' index='0' model='virtio-scsi'>
<alias name='scsi0'/>
<address type='pci' domain='0x0000' bus='0x05' slot='0x00'
function='0x0'/>
</controller>
<controller type='pci' index='0' model='pcie-root'>
<alias name='pcie.0'/>
</controller>
<controller type='pci' index='1' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='1' port='0x8'/>
<alias name='pci.1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'
multifunction='on'/>
</controller>
<controller type='pci' index='2' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='2' port='0x9'/>
<alias name='pci.2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x1'/>
</controller>
<controller type='pci' index='3' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='3' port='0xa'/>
<alias name='pci.3'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x2'/>
</controller>
<controller type='pci' index='4' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='4' port='0xb'/>
<alias name='pci.4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x3'/>
</controller>
<controller type='pci' index='5' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='5' port='0xc'/>
<alias name='pci.5'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x4'/>
</controller>
<controller type='pci' index='6' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='6' port='0xd'/>
<alias name='pci.6'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x5'/>
</controller>
<controller type='pci' index='7' model='dmi-to-pci-bridge'>
<model name='i82801b11-bridge'/>
<alias name='pci.7'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
</controller>
<controller type='pci' index='8' model='pci-bridge'>
<model name='pci-bridge'/>
<target chassisNr='8'/>
<alias name='pci.8'/>
<address type='pci' domain='0x0000' bus='0x07' slot='0x00'
function='0x0'/>
</controller>
<controller type='pci' index='9' model='pcie-root-port'>
<model name='pcie-root-port'/>
<target chassis='9' port='0xe'/>
<alias name='pci.9'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x6'/>
</controller>
<interface type='network'>
<mac address='52:54:00:2f:9e:f0'/>
<source network='pxe' bridge='pxe'/>
<target dev='vnet0'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x01' slot='0x00'
function='0x0'/>
</interface>
<interface type='network'>
<mac address='52:54:00:87:d5:81'/>
<source network='mgmt' bridge='mgmt'/>
<target dev='vnet1'/>
<model type='virtio'/>
<alias name='net1'/>
<address type='pci' domain='0x0000' bus='0x02' slot='0x00'
function='0x0'/>
</interface>
<interface type='network'>
<mac address='52:54:00:2f:9a:e5'/>
<source network='internal' bridge='internal'/>
<target dev='vnet2'/>
<model type='virtio'/>
<alias name='net2'/>
<address type='pci' domain='0x0000' bus='0x03' slot='0x00'
function='0x0'/>
</interface>
<interface type='network'>
<mac address='52:54:00:64:41:45'/>
<source network='public' bridge='public'/>
<target dev='vnet3'/>
<model type='virtio'/>
<alias name='net3'/>
<address type='pci' domain='0x0000' bus='0x04' slot='0x00'
function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/0'/>
<target port='0'/>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/0'>
<source path='/dev/pts/0'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<graphics type='vnc' port='5900' autoport='yes' listen='127.0.0.1'>
<listen type='address' address='127.0.0.1'/>
</graphics>
<video>
<model type='vga' vram='16384' heads='1' primary='yes'/>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x08' slot='0x01'
function='0x0'/>
</video>
</devices>
<seclabel type='dynamic' model='apparmor' relabel='yes'>
<label>libvirt-e4489f63-34a3-47f7-88c6-f6fb60a2aac0</label>
<imagelabel>libvirt-e4489f63-34a3-47f7-88c6-f6fb60a2aac0</imagelabel>
</seclabel>
<seclabel type='dynamic' model='dac' relabel='yes'>
<label>+113:+115</label>
<imagelabel>+113:+115</imagelabel>
</seclabel>
</domain>
> -----Original Message-----
> From: Alexandru Avadanii
> Sent: Monday, July 24, 2017 6:53 PM
> To: 'Andrew Jones'
> Cc: qemu-devel@nongnu.org; svc-armband
> Subject: RE: [Qemu-devel] virtio-net-pci possible limitation on AArch64
>
> Hi, Andrew,
> Thank you for looking at this.
> Comments inline.
>
> > -----Original Message-----
> > From: Andrew Jones [mailto:drjo...@redhat.com]
> > Sent: Monday, July 24, 2017 6:02 PM
> > To: Alexandru Avadanii
> > Cc: qemu-devel@nongnu.org; svc-armband
> > Subject: Re: [Qemu-devel] virtio-net-pci possible limitation on
> > AArch64
> >
> > On Fri, Jul 21, 2017 at 06:37:26PM +0000, Alexandru Avadanii wrote:
> > > Hi,
> > > I ran into an interesting limitation (or possibly bug) while trying
> > > to attach
> > more than 3 (three) virtio-net-pci NICs to an AArch64 guest.
> > > I created 4 network with virsh (see below for xml defitions) -
> > > nothing fancy,
> > only 2 of them use NAT.
> > >
> > > Attaching a virtio-net-pci NIC for each network works well, VMs can
> > > be
> > spawned, all devices are properly detected by the guest OS.
> > > The first 3 guest interfaces work perfectly, however I can't get any
> > > traffic
> > on the 4th one (in my case the public one).
> > >
> > > QEMU version: 2.9.0
> > > Libvirt: tested with both 1.3.4 and 3.5.0, although I don't think
> > > libvirt is to blame here
> >
> > 1.3.4 is way too old for AArch64 guests - 3.0.0 was the first release
> > that contained basic support. The XML below doesn't show what I'd
> > expect for the PCIe topology either (see [*]), and that's likely the
> > problem. I suggest you try a fresh VM creation using latest libvirt and virt
> tools.
> > If it still doesn't work, then confirm it's not a bridging issue by
> > checking that it's always the forth network by changing their order.
>
> I also tried libvirt 3.5.0, but maybe I missed something, like newer
> virt-tools. I
> will redo the test.
> In my previous tests, I tried changing the order, and it was always the fourth
> interface having issues.
>
> >
> > [*] QEMU doc: docs/config/mach-virt-graphical.cfg
> >
> > > Host OS: Ubuntu Xenial 16.04.2 LTS
> > > Guest OS: Ubuntu Xenial Cloud Image (latest available)
> > > Reproducibility
> > > rate: 100% with below config
> > >
> > > VM is created with (also domain XML attached at the end of this mail):
> > > $ virt-install --name cfg01 --ram 4096 --vcpus 6 --cpu
> > > host-passthrough --accelerate \ --network
> > > network:pxe,model=virtio-net-pci \ --network
> > > network:mgmt,model=virtio-net-pci \ --network
> > > network:internal,model=virtio-net-pci \ --network
> > > network:public,model=virtio-net-pci \ --console pty --autostart
> > > --noreboot --noautoconsole --video=vga --noautoconsole [...]
> > >
> > > You might notice I had to disable legacy virtio in the domain XML,
> > > or the
> > guest would complain about a missing F_... property and no guest
> > network interfaces would be detected.
> >
> > You shouldn't need to do this disable-legacy stuff when using PCIe
> > ports, as the virtio devices will automatically use virtio-1.0 ("modern").
> >
> > >
> > > For now, since we only need 4 guest interfaces, we switched one of
> > > them
> > back to virtio-mmio, and everything is working as expected.
> > > Unfortunately I can't investigate this myself right now, but I can
> > > provide
> > additional details if needed for someone else to look into it.
> >
> > I just checked on my setup (RH qemu based on 2.9, RH libvirt based on
> > 3.2). I used Fedora 26's virt-manager from my x86 notebook, remotely
> > connecting to my AArch64 host, in order to create four networks and a
> > guest that has them all attached to four virtio nics. It worked without a
> > hitch.
>
> Good to know this is specific to my setup, I was afraid this is a real issue.
> I'll retest using all suggestions above and get back with the rootcause.
>
> Thank you,
> Alex
>
> >
> > Thanks,
> > drew
> >
> > >
> > > BR,
> > > Alex
> > >
> > > ---
> > > Network definitions:
> > > ---
> > > <network>
> > > <name>pxe</name>
> > > <forward mode='nat'/>
> > > <bridge name='pxe' stp='on' delay='0'/>
> > > <ip address='192.168.10.1' netmask='255.255.255.0'>
> > > <dhcp>
> > > <range start='192.168.10.100' end='192.168.10.254'/>
> > > </dhcp>
> > > </ip>
> > > </network>
> > >
> > > <network>
> > > <name>mgmt</name>
> > > <bridge name='mgmt' stp='on' delay='0'/>
> > > <ip address='172.16.10.1' netmask='255.255.255.0'>
> > > </ip>
> > > </network>
> > >
> > > <network>
> > > <name>internal</name>
> > > <bridge name='internal' stp='on' delay='0'/> </network>
> > >
> > > <network>
> > > <name>public</name>
> > > <forward mode='nat'/>
> > > <bridge name='public' stp='on' delay='0'/>
> > > <ip address='10.16.0.1' netmask='255.255.255.0'>
> > > </ip>
> > > </network>
> > >
> > > ---
> > > Domain XML:
> > > ---
> > > <domain type='kvm' id='28'
> > xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
> > > <name>cfg01</name>
> > > <uuid>3f8415d1-963a-46aa-8a63-1c6558775b92</uuid>
> > > <memory unit='KiB'>4194304</memory>
> > > <currentMemory unit='KiB'>4194304</currentMemory>
> > > <vcpu placement='static'>6</vcpu>
> > > <resource>
> > > <partition>/machine</partition>
> > > </resource>
> > > <os>
> > > <type arch='aarch64' machine='virt-2.9'>hvm</type>
> > > <loader readonly='yes'
> > type='pflash'>/usr/share/AAVMF/AAVMF_CODE.fd</loader>
> > > <nvram>/var/lib/libvirt/qemu/nvram/cfg01_VARS.fd</nvram>
> > > <boot dev='hd'/>
> > > </os>
> > > <features>
> > > <acpi/>
> > > <gic version='3'/>
> > > </features>
> > > <cpu mode='host-passthrough' check='none'/>
> > > <clock offset='utc'/>
> > > <on_poweroff>destroy</on_poweroff>
> > > <on_reboot>restart</on_reboot>
> > > <on_crash>restart</on_crash>
> > > <devices>
> > > <emulator>/usr/bin/kvm</emulator>
> > > <disk type='file' device='disk'>
> > > <driver name='qemu' type='qcow2' cache='none' io='native'/>
> > > <source
> > file='/home/jenkins/alav/armband/upstream/fuel/mcp/scripts/images/mcp
> > _cfg01.qcow2'/>
> > > <backingStore/>
> > > <target dev='vda' bus='virtio'/>
> > > <alias name='virtio-disk0'/>
> > > <address type='pci' domain='0x0000' bus='0x04' slot='0x00'
> > function='0x0'/>
> > > </disk>
> > > <disk type='file' device='cdrom'>
> > > <driver name='qemu' type='raw'/>
> > > <source
> > file='/home/jenkins/alav/armband/upstream/fuel/mcp/scripts/images/mcp
> > _cfg01.iso'/>
> > > <backingStore/>
> > > <target dev='sda' bus='scsi'/>
> > > <readonly/>
> > > <alias name='scsi0-0-0-0'/>
> > > <address type='drive' controller='0' bus='0' target='0' unit='0'/>
> > > </disk>
> > > <controller type='scsi' index='0' model='virtio-scsi'>
> > > <alias name='scsi0'/>
> > > <address type='pci' domain='0x0000' bus='0x03' slot='0x00'
> > function='0x0'/>
> > > </controller>
> > > <controller type='pci' index='0' model='pcie-root'>
> > > <alias name='pcie.0'/>
> > > </controller>
> > > <controller type='pci' index='1' model='dmi-to-pci-bridge'>
> > > <model name='i82801b11-bridge'/>
> > > <alias name='pci.1'/>
> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> > function='0x0'/>
> > > </controller>
> > > <controller type='pci' index='2' model='pci-bridge'>
> > > <model name='pci-bridge'/>
> > > <target chassisNr='2'/>
> > > <alias name='pci.2'/>
> > > <address type='pci' domain='0x0000' bus='0x01' slot='0x00'
> > function='0x0'/>
> > > </controller>
> > > <controller type='pci' index='3' model='pcie-root-port'>
> > > <model name='pcie-root-port'/>
> > > <target chassis='3' port='0x10'/>
> > > <alias name='pci.3'/>
> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> > function='0x0' multifunction='on'/>
> > > </controller>
> > > <controller type='pci' index='4' model='pcie-root-port'>
> > > <model name='pcie-root-port'/>
> > > <target chassis='4' port='0x11'/>
> > > <alias name='pci.4'/>
> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> > function='0x1'/>
> > > </controller>
> > > <controller type='pci' index='5' model='pcie-root-port'>
> > > <model name='pcie-root-port'/>
> > > <target chassis='5' port='0x12'/>
> > > <alias name='pci.5'/>
> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> > function='0x2'/>
> > > </controller>
> > > <interface type='network'>
> > > <mac address='52:54:00:ae:48:81'/>
> > > <source network='pxe' bridge='pxe'/>
> > > <target dev='vnet0'/>
> > > <model type='virtio-net-pci'/>
> > > <alias name='net0'/>
> > > <address type='pci' domain='0x0000' bus='0x02' slot='0x01'
> > function='0x0'/>
> > > </interface>
> > > <interface type='network'>
> > > <mac address='52:54:00:36:2c:a9'/>
> > > <source network='mgmt' bridge='mgmt'/>
> > > <target dev='vnet1'/>
> > > <model type='virtio-net-pci'/>
> > > <alias name='net1'/>
> > > <address type='pci' domain='0x0000' bus='0x02' slot='0x02'
> > function='0x0'/>
> > > </interface>
> > > <interface type='network'>
> > > <mac address='52:54:00:43:ce:03'/>
> > > <source network='internal' bridge='internal'/>
> > > <target dev='vnet2'/>
> > > <model type='virtio-net-pci'/>
> > > <alias name='net2'/>
> > > <address type='pci' domain='0x0000' bus='0x02' slot='0x03'
> > function='0x0'/>
> > > </interface>
> > > <interface type='network'>
> > > <mac address='52:54:00:37:e6:0e'/>
> > > <source network='public' bridge='public'/>
> > > <target dev='vnet3'/>
> > > <model type='virtio-net-pci'/>
> > > <alias name='net3'/>
> > > <address type='pci' domain='0x0000' bus='0x02' slot='0x04'
> > function='0x0'/>
> > > </interface>
> > > <serial type='pty'>
> > > <source path='/dev/pts/0'/>
> > > <target port='0'/>
> > > <alias name='serial0'/>
> > > </serial>
> > > <console type='pty' tty='/dev/pts/0'>
> > > <source path='/dev/pts/0'/>
> > > <target type='serial' port='0'/>
> > > <alias name='serial0'/>
> > > </console>
> > > <graphics type='vnc' port='5900' autoport='yes' listen='127.0.0.1'>
> > > <listen type='address' address='127.0.0.1'/>
> > > </graphics>
> > > <video>
> > > <model type='vga' vram='16384' heads='1' primary='yes'/>
> > > <alias name='video0'/>
> > > <address type='pci' domain='0x0000' bus='0x02' slot='0x05'
> > function='0x0'/>
> > > </video>
> > > </devices>
> > > <seclabel type='dynamic' model='apparmor' relabel='yes'>
> > > <label>libvirt-3f8415d1-963a-46aa-8a63-1c6558775b92</label>
> > > <imagelabel>libvirt-3f8415d1-963a-46aa-8a63-
> > 1c6558775b92</imagelabel>
> > > </seclabel>
> > > <seclabel type='dynamic' model='dac' relabel='yes'>
> > > <label>+113:+115</label>
> > > <imagelabel>+113:+115</imagelabel>
> > > </seclabel>
> > > <qemu:commandline>
> > > <qemu:arg value='-global'/>
> > > <qemu:arg value='virtio-pci.disable-legacy=on'/>
> > > </qemu:commandline>
> > > </domain>
> > >
