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We don't want to have to create a new binary for each vcpu config, so prepare to run the test for multiple vcpu configs in a single binary. We do this by factoring out the test from main() and then looping over configs. When given '--list' we still never print more than a single reg-list for a single vcpu config though, because it would be confusing otherwise. No functional change intended. Signed-off-by: Andrew Jones <drjones@redhat.com> Reviewed-by: Ricardo Koller <ricarkol@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20210531103344.29325-3-drjones@redhat.com