Public bug reported:
-- Problem description --
cpu hotplug fails on ubuntu17.04 guest lotg3 with the following error:
root@lotkvm:~# virsh setvcpus lotg3 8 --live
setlocale: No such file or directory
error: internal error: unable to execute QEMU command 'cpu-add': Not supported
-- Guest configuration: lotg3 ---
root@lotg3:~# dpkg -l |grep rtas
ii librtas2 2.0.0-2
ppc64el userspace RTAS library
ii librtasevent2 2.0.0-2
ppc64el RTAS events library
ii ppc64-diag 2.7.1-6
ppc64el Platform error log analysis tool and rtas_errd daemon
root@lotg3:~# dpkg -l |grep powerpc
ii powerpc-ibm-utils 1.3.2-1
ppc64el utilities for maintenance of IBM PowerPC platforms
ii powerpc-utils 1.3.2-1
ppc64el utilities for maintenance of PowerPC platforms (metapackage)
root@lotg3:~#
root@lotg3:~# service rtas* status
? rtas_errd.service - ppc64-diag rtas_errd (platform error handling) Service
Loaded: loaded (/lib/systemd/system/rtas_errd.service; enabled; vendor preset
Active: active (running) since Fri 2017-02-24 04:38:29 CST; 7h ago
Docs: man:rtas_errd(8)
Main PID: 1852 (rtas_errd)
Tasks: 1 (limit: 4915)
CGroup: /system.slice/rtas_errd.service
??1852 /usr/sbin/rtas_errd start
Feb 24 04:38:14 lotg3 systemd[1]: Starting ppc64-diag rtas_errd (platform error
Feb 24 04:38:29 lotg3 systemd[1]: Started ppc64-diag rtas_errd (platform error h
[1]+ Stopped service rtas* status
root@lotg3:~#
root@lotg3:~# lscpu
Architecture: ppc64le
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 4
Core(s) per socket: 1
Socket(s): 1
NUMA node(s): 1
Model: 2.1 (pvr 004b 0201)
Model name: POWER8 (architected), altivec supported
Hypervisor vendor: KVM
Virtualization type: para
L1d cache: 64K
L1i cache: 32K
NUMA node0 CPU(s): 0-3
root@lotkvm:~# virsh dumpxml lotg3
setlocale: No such file or directory
<domain type='kvm' id='65'>
<name>lotg3</name>
<uuid>d1acabd8-a1cf-47b7-8b60-88e503abbff9</uuid>
<memory unit='KiB'>4194304</memory>
<currentMemory unit='KiB'>4194304</currentMemory>
<memoryBacking>
<hugepages/>
</memoryBacking>
<vcpu placement='static' current='4'>8</vcpu>
<cputune>
<shares>4096</shares>
</cputune>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='ppc64le' machine='pseries-2.5'>hvm</type>
<boot dev='hd'/>
<boot dev='network'/>
</os>
<cpu mode='host-model'>
<model fallback='forbid'>power8</model>
<topology sockets='2' cores='1' threads='4'/>
</cpu>
<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='volume' device='lun'>
<driver name='qemu' type='raw' cache='none'/>
<source pool='poolvhba0' volume='unit:0:0:9'/>
<backingStore/>
<target dev='hd0' bus='scsi'/>
<alias name='scsi0-0-0-0'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='scsi' index='0'>
<alias name='scsi0'/>
<address type='spapr-vio' reg='0x2000'/>
</controller>
<controller type='usb' index='0' model='pci-ohci'>
<alias name='usb'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
</controller>
<controller type='pci' index='0' model='pci-root'>
<alias name='pci.0'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:cb:ae:53'/>
<source bridge='br0'/>
<virtualport type='openvswitch'>
<parameters interfaceid='cc62f899-4d6f-4b85-99b9-4e48a1ef623a'/>
</virtualport>
<target dev='vnet2'/>
<model type='virtio-net'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/2'/>
<target port='0'/>
<alias name='serial0'/>
<address type='spapr-vio' reg='0x30000000'/>
</serial>
<console type='pty' tty='/dev/pts/2'>
<source path='/dev/pts/2'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
<address type='spapr-vio' reg='0x30000000'/>
</console>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
</memballoon>
<panic model='pseries'/>
</devices>
<seclabel type='none' model='apparmor'/>
<seclabel type='dynamic' model='dac' relabel='yes'>
<label>+64055:+117</label>
<imagelabel>+64055:+117</imagelabel>
</seclabel>
</domain>
** Affects: qemu (Ubuntu)
Importance: Undecided
Assignee: Taco Screen team (taco-screen-team)
Status: New
** Tags: architecture-ppc64le bugnameltc-152004 severity-critical
targetmilestone-inin1704
** Tags added: architecture-ppc64le bugnameltc-152004 severity-critical
targetmilestone-inin1704
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https://bugs.launchpad.net/bugs/1667805
Title:
ISST-LTE:UBUNTUKVM17.04:lotkvm:lotg3: CPU hotplug fails with 'cpu-
add': Not supported error
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