Re: [Xen-devel] [PATCH 10/12] xen: arm: handle remaining traps from userspace

2015-03-25 Thread Julien Grall
Hi Ian, On 25/03/15 14:22, Ian Campbell wrote: > CP14 dbg and general CP register access are both handled with > unconditional injection of #undef from their respective handlers, so > allow these even from 32-bit userspace on a 64-bit kernel. > > SMC32 and HVC32 should only come from a guest in A

[Xen-devel] [PATCH 10/12] xen: arm: handle remaining traps from userspace

2015-03-25 Thread Ian Campbell
CP14 dbg and general CP register access are both handled with unconditional injection of #undef from their respective handlers, so allow these even from 32-bit userspace on a 64-bit kernel. SMC32 and HVC32 should only come from a guest in AArch32 mode and SMC64 and HVC64 should only come from a gu