Fabrice Bellard wrote:
> 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 ?
>
It certainly supports running the kernel in ring 1 or 2. The kernel
uses the test CS.rpl != 3 to distinguish between kernel and user modes,
and we're not proposing changing that.
> 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.
>
I think that would be a more widespread change than the ones we're
proposing, but perhaps I'm overlooking something.
J
