On 08/04/2016 18:00, Andy Lutomirski wrote: > But %ss can be loaded with 0 on 64-bit kernels. (I assume that > loading 0 into %ss sets SS.DPL to 0 if done at CPL0, but I'm vague on > this, since it only really matters to hypervisor code AFAIK.) It's even simpler, unless CPL=0 SS cannot be loaded with 0 while in a 64-bit code segment (SS can never be loaded with 0 if you're not in a 64-bit code segment). Thus indeed SS=0 implies SS.DPL=0 on 64-bit kernels. Paolo > 32-bit kernels need __KERNEL_DS, I think. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
