Hi, As something like VMI is expected to be supported soon by QEMU, I have a small question: does the virtualization API you are defining supports that the guest kernel code can be executed in ring 3 ? In QEMU for example, the guest kernel code can be executed either by the dynamic translator (in this case CS.rpl = 0 and SS.rpl = 0) or by the kqemu kernel module (in this case CS.rpl = 3 and SS.rpl = 3). So a good behaviour would be to ignore the rpl field of both CS and SS in kernel mode. Regards, Fabrice.