s390x: handle exceptions during s390_cpu_virt_mem_rw() correctly (TCG)
s390_cpu_virt_mem_rw() must always return, so callers can react on an exception (e.g. see ioinst_handle_stcrw()). However, for TCG we always have to exit the cpu loop (and restore the cpu state before that) if we injected a program interrupt. So let's introduce and use s390_cpu_virt_mem_handle_exc() in code that is not purely KVM. Directly pass the retaddr we already have available in these functions. Reviewed-by: NRichard Henderson <richard.henderson@linaro.org> Signed-off-by: NDavid Hildenbrand <david@redhat.com> Message-Id: <20171130162744.25442-8-david@redhat.com> Signed-off-by: NCornelia Huck <cohuck@redhat.com>
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