On Fri, Oct 19, 2018 at 11:17:32AM +0100, Marc Zyngier wrote: > 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... Done. -- Catalin _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
