On 21/09/18 21:49, James Morse wrote: > enable_smccc_arch_workaround_1() passes NULL as the hyp_vecs start and > end if the HVC conduit is in use, and ARM_SMCCC_ARCH_WORKAROUND_1 is > detected. > > If the guest kernel happened to be built with KVM_INDIRECT_VECTORS, > we go on to allocate a slot, memcpy() the empty workaround in and > do the appropriate cache maintenance. > > This works as we always tell memcpy() the range is 0, so it never > accesses the NULL src pointer, but we still do the cache maintenance. > > If hyp_vecs_start is NULL we know we're a guest, just update the fn > like the !KVM_INDIRECT_VECTORS version. > > Signed-off-by: James Morse <james.morse@xxxxxxx> > Reviewed-by: Julien Thierry <julien.thierry@xxxxxxx> Acked-by: Marc Zyngier <marc.zyngier@xxxxxxx> Catalin: could you sneak this one in for 4.20? It is strictly a KVM patch, but its location makes it more suitable for the arm64 tree... Thanks, M. -- Jazz is not dead. It just smells funny... _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
