On Mon, 10 Oct 2011 11:02:08 +0100
"Daniel P. Berrange" <berrange@xxxxxxxxxx> wrote:
> On Sat, Oct 08, 2011 at 12:19:11AM +0530, Prerna Saxena wrote:
> > This patch is a hack at the moment and would need code refactoring to
> > split-out the defaults for x86 and powerpc. Libvirt chooses a set of
> > default options such as disk controller, network specific options, etc
> > which are suitable for a x86 host. These defaults are arch specific
> > and hence libvirt needs a runtime switch to setup defaults based on
> > host architecture. Libvirt should have this routine split per-arch at
> > the right level with minimal code duplication.
> >
> > ---
> > src/qemu/qemu_command.c | 30 +++++++++++++++++++++++++++++-
> > 1 files changed, 29 insertions(+), 1 deletions(-)
> >
> > diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> > index 0adc56a..3040f6a 100644
> > --- a/src/qemu/qemu_command.c
> > +++ b/src/qemu/qemu_command.c
> >
> > ...[snip]...
>
> I have a rough idea of why you need most of these changes, but to just
> clarify things, could you show us the following data from a PPC QEMU
> guest after you have this patch applied.
>
> - XML configuration file
<domain type='kvm'>
<name>test-1</name>
<memory>1048576</memory>
<memoryBacking>
<hugepages/>
</memoryBacking>
<vcpu>2</vcpu>
<os>
<type arch='ppc64' machine='pseries'>hvm</type>
</os>
<features>
<acpi/>
</features>
<clock offset='utc'/>
<devices>
<emulator>qemu-system-ppc64</emulator>
<disk type='file' device='disk' >
<driver name='qemu' type='raw'/>
<source file='/TEST.img'/>
<target dev='sda' bus='scsi'/>
</disk>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<graphics type='vnc' port='-1' autoport='yes' listen='www.xxx.yyy.zzz'/>
</devices>
</domain>
> - The QEMU ARGV from /var/log/libvirt/qemu/$GUESTNAME.log
qemu-system-ppc64 -S -M pseries -enable-kvm -m 4096 -mem-prealloc \
-mem-path /hugetlbfs/libvirt/qemu -smp 2,sockets=2,cores=1,\
threads=1 -name test1 -chardev socket,id=charmonitor,\
path=/var/lib/libvirt/qemu/test1.monitor,server,nowait \
-mon chardev=charmonitor,id=monitor,mode=readline -rtc base=utc \
-drive file=/TEST.img,if=scsi,format=raw -chardev pty,id=charserial0\
-usb -vnc www.xxx.yyy.zzz -vga cirrus
> - The output of
>
> $ virsh qemu-monitor-command --hmp $GUESTNAME 'info qtree'
virsh # qemu-monitor-command --hmp test-1 'info qtree'
bus: main-system-bus
type System
dev: spapr-virtio-bridge, id ""
irq 0
bus: spapr-virtio
type spapr-virtio
dev: spapr-vio-bridge, id ""
irq 0
bus: spapr-vio
type spapr-vio
dev: spapr-vscsi, id "v-scsi@2000"
dev-prop: reg = 8192
bus-prop: irq = 18
bus: v-scsi@2000.0
type SCSI
dev: scsi-disk, id ""
dev-prop: drive = scsi0-cd2
dev-prop: logical_block_size = 512
dev-prop: physical_block_size = 512
dev-prop: min_io_size = 0
dev-prop: opt_io_size = 0
dev-prop: bootindex = -1
dev-prop: discard_granularity = 0
dev-prop: ver = "0.15.50"
dev-prop: serial = <null>
dev-prop: removable = off
bus-prop: scsi-id = 2
bus-prop: lun = 0
dev: scsi-disk, id ""
dev-prop: drive = scsi0-hd0
dev-prop: logical_block_size = 512
dev-prop: physical_block_size = 512
dev-prop: min_io_size = 0
dev-prop: opt_io_size = 0
dev-prop: bootindex = -1
dev-prop: discard_granularity = 0
dev-prop: ver = "0.15.50"
dev-prop: serial = <null>
dev-prop: removable = off
bus-prop: scsi-id = 0
bus-prop: lun = 0
dev: spapr-vlan, id "l-lan@1000"
dev-prop: reg = 4096
dev-prop: mac = 52:54:00:12:34:56
dev-prop: vlan = 0
dev-prop: netdev = <null>
dev-prop: bootindex = -1
bus-prop: irq = 17
dev: spapr-vty, id "vty@30000000"
dev-prop: reg = 805306368
dev-prop: chardev = serial0
bus-prop: irq = 16
> $ virsh qemu-monitor-command --hmp $GUESTNAME 'info pci'
> $ virsh qemu-monitor-command --hmp $GUESTNAME 'info block'
>
virsh # qemu-monitor-command --hmp test-1 'info pci'
virsh # qemu-monitor-command --hmp test-1 'info block'
scsi0-hd0: removable=0 file=/home/prerna/RHEL6_install.img ro=0 drv=raw encrypted=0
scsi0-cd2: removable=1 locked=0 tray-open=0 [not inserted]
floppy0: removable=1 locked=0 tray-open=0 [not inserted]
sd0: removable=1 locked=0 tray-open=0 [not inserted]
> - The output of $ qemu-kvm -device '?'
Throws a lot of devices, I'm pasting a few here :
name "xilinx,ethlite", bus System
name "spapr-vty", bus spapr-vio
name "spapr-vscsi", bus spapr-vio
name "scsi-cd", bus SCSI, desc "virtual SCSI CD-ROM"
name "scsi-hd", bus SCSI, desc "virtual SCSI disk"
...
Thanks,
--
Prerna Saxena
Linux Technology Centre,
IBM Systems and Technology Lab,
Bangalore, India
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