Re: [Qemu-devel] [Qemu-ppc] [PATCH 00/77] ppc: Add "native" POWER8 platform

[Alexey Kardashevskiy]

On 11/11/2015 02:38 PM, Benjamin Herrenschmidt wrote:
> On Wed, 2015-11-11 at 14:27 +1100, Alexey Kardashevskiy wrote:
> > On 11/11/2015 11:56 AM, Benjamin Herrenschmidt wrote:
> > > On Tue, 2015-11-10 at 17:50 -0700, Eric Blake wrote:
> > > > It would be nice to include a diffstat (git defaults to doing
> > > > this if
> > > > you use 'git format-patch --cover-letter' for generating the 0/77
> > > > letter), so that we can see at a glance how big this series is
> > > > and
> > > > what files it touches.
> > >
> > > Right. I'll do that next time. In the meantime, I've appended the
> > > diffstat below.
> >
> >
> > Some working example of qemu command line would not hurt. Known
> > limitations
> > as well. Like:
> >
> > - it does not run under neither kvm-hv nor kvm-pr;
>
> It will never run under HV KVM,  indeed. I did mention somewhere else
> that support for PR KVM was possible, just quite a bit of work. I will
> add it to next version's cover letter.
>
> > - cannot boot LE kernel;
> > ...
>
> It boots an LE kernel just fine :-)


aaaaand there is still no working example ;)


This:

p/qemu-powernv/ppc64-softmmu/qemu-system-ppc64 -m 2048 -machine powernv \
-nographic -vga none -initrd t/le.cpio -kernel t/vml420le -bios \
skiboot.lid -smp 1,threads=1

just hangs at:

[1491287872,5] INIT: Waiting for kernel...
[1493257423,5] Assuming kernel at 0x20000000
[1494710040,5] INIT: Kernel loaded, size: 0 bytes (0 = unknown preload)
[1497506414,5] INIT: 64-bit LE kernel discovered
[1500827972,5] INIT: 64-bit kernel entry at 0x20010000
[1505594383,3] OCC: No HOMER detected, assuming no pstates
[1507983930,3] ELOG: Error getting buffer to log error
[1556792870,5] Free space in HEAP memory regions:
[1559724738,5] Region ibm,firmware-heap free: 12778984
[1561377946,5] Region ibm,address@hidden free: 376992
[1563789914,5] Total free: 13155976
[1565066925,5] INIT: Starting kernel at 0x20010000, fdt at 0x30350610 (size 
0x2ce4)


With BE kernel and initrd, it goes further and boots fine:

[1589979488,5] Total free: 13155976
[1591411784,5] INIT: Starting kernel at 0x20010000, fdt at 0x30350610 (size 
0x2ce4)
[1687534980,3] OPAL: Trying a CPU re-init with flags: 0x1
CPU maps initialized for 1 thread per core
....


If I try LE disk image (ubuntu 14), it just crashes:

p/qemu-powernv/ppc64-softmmu/qemu-system-ppc64 -m 2048 -machine powernv \
-nographic -vga none img/u14_32GB_cuda7.qcow2 -bios skiboot.lid \
-smp 1,threads=1
qemu: hardware error: qemu: could not load kernel'(null)'


CPU #0:
NIP 0000000000000000   LR 0000000000000000 CTR 0000000000000000 XER 
0000000000000000 CPU#0
MSR 0000000000000000 HID0 0000000000000000  HF 0000000000000000 iidx 0
didx 0
TB 00000000 00000000 DECR 00000000
...


> Also next spin will have skiboot.lid

Right. With the note that it goes with -bios :)




--
Alexey