s390x/tcg: STOPPED cpus can never wake up

Interrupts can't wake such CPUs up. SIGP from other CPUs has to be used
to toggle the state.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170928203708.9376-7-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
1 file changed