Hi Dave, On 18/02/2019 19:52, Dave Martin wrote: > + /* > + * Mismatches above sve_max_virtualisable_vl are fine, since > + * no guest is allowed to configure ZCR_EL2.LEN to exceed this: > + */ > + if (sve_vl_from_vq(bit_to_vq(b)) <= sve_max_virtualisable_vl) { > + pr_warn("SVE: cpu%d: Unsupported vector length(s) present\n", > + smp_processor_id()); Would it be worth to print the unsupported vector length? Cheers, -- Julien Grall