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[Qemu-devel] pseries machine does not like older CPUs anymore

From: Thomas Huth
Subject: [Qemu-devel] pseries machine does not like older CPUs anymore
Date: Tue, 28 Jun 2016 09:29:33 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0

 Hi Bharata,

there seems to be a regression with current QEMU master: The pseries
machine does not work with older 64-bit ppc CPUs anymore. With QEMU
2.6.0, it is possible to run:

 qemu-system-ppc64 -nographic -M pseries -cpu 970


 qemu-system-ppc64 -nographic -M pseries -cpu POWER5+

but with QEMU master, I now only get a "Unable to find sPAPR CPU Core
definition" error message and then QEMU quits.

At a quick glance, this seems to be related to the new CPU hotplug
code... so could you maybe have a look?


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