Re: [RFC PATCH 17/35] Segment register changes for Xen

Chris Wright
2006-03-22T19:33:19Z

* Andi Kleen (ak@suse.de) wrote:
> On Wednesday 22 March 2006 07:30, Chris Wright wrote:
>
> > +#define get_kernel_cs() \
> > + (__KERNEL_CS + (xen_feature(XENFEAT_supervisor_mode_kernel) ? 0 : 1))
>
> Under what circumstances is that feature set?

When building hypervisor with that support. It then builds a different
hypercall_page for the guest to use, and both co-exist in ring0. It's
for running directly on native.

thanks,
-chris