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/openbmc/qemu/hw/ppc/ |
H A D | spapr.c | 58c46efa Fri Aug 30 11:13:45 CDT 2019 Laurent Vivier <lvivier@redhat.com> pseries: do not allow memory-less/cpu-less NUMA node When we hotplug a CPU on memory-less/cpu-less node, the linux kernel crashes. This happens because linux kernel needs to know the NUMA topology at start to be able to initialize the distance lookup table. On pseries, the topology is provided by the firmware via the existing CPUs and memory information. Thus a node without memory and CPU cannot be discovered by the kernel. To avoid the kernel crash, do not allow to start pseries with empty nodes. Signed-off-by: Laurent Vivier <lvivier@redhat.com> Message-Id: <20190830161345.22436-1-lvivier@redhat.com> [dwg: Rework to cope with movement of numa state from globals to MachineState] Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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