Re: assert in qemu under tcg in an smp case

[Daniel Henrique Barboza]

On 6/22/21 6:49 PM, Ivan Warren wrote:
> > Can you share the command line you used, host arch, host OS and so on?
> Sure thing !
>
> Here goes nothing : (AIX is already installed on the AIX-ROOT.IMG1.RAW file - 
> the fact that it is raw was just a performance test.. but same thing with 
> qcow2).
>
> It is booting just fine if I comment out the g_assert() statement and rebuild 
> or go single processor.
>
> (I'm hiding the S/N because it is an actual machine - another test)
>
> PS : The system has been brought up to SP2 - but same symptoms.
>
> PPS : netdev xpq01nic01 is a predefined TAP device connected to an OpenVswitch 
> bridge.
>
> qemu-system-ppc64 \
>      -cpu power8 \
>      -smp sockets=1,cores=8 \
>      -machine pseries,host-serial=<HIDDEN>,host-model=8286 \
>      -cdrom AIX_v7.2_Install_7200-05-00-2037_DVD_1_of_2_112020_LCD8223014.iso \
>      -drive 
> file=AIX-ROOT.IMG1.RAW,if=none,id=disk0,format=raw,cache=none,discard=unmap,detect-zeroes=unmap
>  \
>      -drive 
> file=AIX-DATA-0.IMG,if=none,id=disk1,format=raw,cache=none,discard=unmap,detect-zeroes=unmap
>  \
>      -device virtio-scsi-pci \
>      -device scsi-hd,drive=disk0,scsi-id=0 \
>      -device scsi-hd,drive=disk1,scsi-id=1 \
>      -object rng-random,filename=/dev/urandom,id=rng0 \
>      -device spapr-rng,rng=rng0 \
>      -netdev tap,ifname=xpq01nic01,script=no,downscript=no,id=n0 \
>      -device spapr-vlan,netdev=n0,mac=52:54:00:12:00:02 \
>      -m 4G \
>      -accel tcg,thread=multi \
>      -prom-env boot-command='boot disk:' \
>      -nographic \
>      -vga none \
>      -serial mon:stdio


Can you try the same test but with this '-machine' args:


-machine 
pseries,host-serial=<HIDDEN>,host-model=8286,cap-cfpc=workaround,cap-sbbc=workaround,cap-ibs=broken
 \


and


-machine 
pseries-2.11,host-serial=<HIDDEN>,host-model=8286,cap-cfpc=workaround,cap-sbbc=workaround,cap-ibs=broken
 \


It'll probably break in the same way since  you're using TCG, but people
inside IBM are able to run guests with these machine caps.


Also, did you attempt to run it using -accel kvm? The problem you're
seeing is TCG specific code, so seeing if KVM acceleration works would
be a good test.



Daniel





> --Ivan