[FEATURE] POWER9: libvirt: Updates needed for P8_compat mode guest on P9 host

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== Comment: #0 - Leonardo Augusto Guimaraes Garcia <email address hidden> - 2016-09-16 16:01:25 ==

[FEATURE] POWER9: libvirt: Updates needed for P8_compat mode guest on P9 host
anything else that includes live migration between P8-P9, etc..

[Christian Ehrhardt  (paelzer)]

Will we get a list of upstream commits or what is planned in that regard?

[Christian Ehrhardt  (paelzer)]

Note: Related Qemu bug which very likely is a prereq is bug 1692451

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------- Comment From <email address hidden> 2017-05-23 12:16 EDT-------
(In reply to comment #4)
> Will we get a list of upstream commits or what is planned in that regard?

Yes. As soon as we have this list Shiva will post the commit iDs here.

[Christian Ehrhardt  (paelzer)]

Ping - Polling for related commit ID's or libvirt versions for p9 support

[Christian Ehrhardt  (paelzer)]

Hi,
I'm working on the just released libvirt 3.5 - will the patches be in there already?
If not what is your timeline on this?

[Christian Ehrhardt  (paelzer)]

The bug is still quite unclear on which changes are needed exactly.
But in some discussions outside this bug it was agreed that all should be in libvirt 3.5 and therefore having 3.5 in artful should solve the bug.

Now libvirt 3.5 is available in Artful now, so setting fix released.

If there is more needed please let us know in more detail and set back to new or report a new bug entirely as applicable.

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------- Comment From <email address hidden> 2017-07-20 07:33 EDT-------
Hi,

libvirt - 3.5 has most of the P9 related fixes. Can you rebase to 3.6 instead which has the Multi-phb support as well?

Thanks,
Shivaprasad

[Christian Ehrhardt  (paelzer)]

------- Comment From <email address hidden> 2017-07-20 07:33 EDT-------
> libvirt - 3.5 has most of the P9 related fixes. Can you rebase to 3.6
> instead which has the Multi-phb support as well?
>

For now 3.6 isn't even released so no-way.
Really I polled for input on so many times/places I'm not even sure if 3.6
is possible.

I see 210dd0c "qemu: Take all PHBs into account while calculating memlock
limits" but as I said not released yet.
Also new multip PHB suppoer doesn't sound like anything that was on the
bugs I've seen so far.

The TL;DR on all of these is, if there are things you need that are not in
3.5 please open new bugs so that we can consider and decide on them one by
one.

[Christian Ehrhardt  (paelzer)]

Since no one has opened a new bug since I asked I'll report here on the Multi-phb request.
But if there is any response or request about it please -> new bug.

It seems likely that I move to libvirt 3.6 for multiple reasons - this request is just one of them.
Lacking a bug number I can't close when uploading - if you need that for tracking open a new bug.

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------- Comment From <email address hidden> 2017-10-12 23:56 EDT-------
Tested this and working fine.

Added the following the guest xml:
<cpu mode='host-model' check='partial'>
<model fallback='forbid'>power8</model>
</cpu>

From 'ps' output qemu command shows "-cpu host,compat=power8"

/usr/bin/qemu-system-ppc64 -name guest=nrs,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-1-nrs/master-key.aes -machine pseries-artful,accel=kvm,usb=off,dump-guest-core=off -cpu host,compat=power8 -m size=8388608k,slots=32,maxmem=138412032k -realtime mlock=off -smp 8,sockets=8,cores=1,threads=1 -uuid 7537dd5b-dd96-4299-b433-66ab4055256e -display none -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-1-nrs/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -boot strict=on -device pci-ohci,id=usb,bus=pci.0,addr=0x2 -device spapr-vscsi,id=scsi0,reg=0x2000 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x4 -drive file=/home/user/nasastry/ubuntu-17.10-ppc64le.qcow2,format=qcow2,if=none,id=drive-scsi0-0-0-0 -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1 -netdev tap,fd=26,id=hostnet0,vhost=on,vhostfd=28 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:4a:4b:4c,bus=pci.0,addr=0x1 -chardev pty,id=charserial0 -device spapr-vty,chardev=charserial0,reg=0x30000000 -chardev socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/domain-1-nrs/vioser-00-00-01.sock,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0 -chardev socket,id=charchannel1,path=/var/lib/libvirt/qemu/channel/target/domain-1-nrs/vioser-00-00-02.sock,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 -msg timestamp=on

After the guest boot:
croot@ubuntu1710:~# cat /proc/cpuinfo
processor : 0
cpu : POWER8 (architected), altivec supported
clock : 2600.000000MHz
revision : 2.0 (pvr 004e 1200)

Can see Power8.

This bugzilla can be closed.

------- Comment From <email address hidden> 2017-10-12 23:57 EDT-------
root@ltc-boston122:~# dpkg -l | grep "libvirt\|qemu"
ii ipxe-qemu 1.0.0+git-20161027.b991c67+really20150424.a25a16d-1ubuntu1 all PXE boot firmware - ROM images for qemu
ii libvirt-bin 3.6.0-1ubuntu4 ppc64el programs for the libvirt library
ii libvirt-clients 3.6.0-1ubuntu4 ppc64el Programs for the libvirt library
ii libvirt-daemon 3.6.0-1ubuntu4 ppc64el Virtualization daemon
ii libvirt-daemon-system 3.6.0-1ubuntu4 ppc64el Libvirt daemon configuration files
ii libvirt0:ppc64el 3.6.0-1ubuntu4 ppc64el library for interfacing with different virtualization syste...