On 13.09.2017 18:13, Alex Bennée wrote: > > David Hildenbrand <da...@redhat.com> writes: > >> Specifying more than 1 CPU (e.g. -smp 5) leads to SIGP errors (the >> guest tries to bring these CPUs up but fails), because we don't support >> multiple CPUs on s390x under TCG. >> >> Let's bail out if more than 1 is specified, so we don't raise people's >> hope. > > Why does this restriction exist? Without MTTCG enabled -smp > 1 should > be safe from any races.
Because the actual SIGP code (instruction to start/stop ... CPUs) is not implemented yet. -- Thanks, David
