kvm-all: make async_safe_run_on_cpu safe on kvm too
Wrap the bulk of kvm_cpu_exec with cpu_exec_start/end, so that kvm version can also enjoy performing certain operations while all vCPUs are quiescent. Signed-off-by: NRoman Kagan <rkagan@virtuozzo.com> Message-Id: <20170606181948.16238-15-rkagan@virtuozzo.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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