spapr: add "stop-self" RTAS call required to support hot CPU unplug
PAPR+ requires two RTAS calls to be supported by the hypervisor in order to allow hotplugging VCPUs from the guest. The "start-cpu" RTAS call was already there but "stop-self" was not. This adds the "stop-self" RTAS call. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NAlexander Graf <agraf@suse.de>
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