Re: [Xen-devel] [V10 PATCH 09/23] PVH xen: introduce pvh_set_vcpu_info() and vmx_pvh_set_vcpu_info()

[Tim Deegan <tim@xxxxxxx>]

At 17:02 -0700 on 12 Aug (1376326969), Mukesh Rathor wrote:
> On Mon, 12 Aug 2013 10:00:36 +0100 Tim Deegan <tim@xxxxxxx> wrote:
> > At 16:41 -0700 on 09 Aug (1376066498), Mukesh Rathor wrote:
> > > Ugh, to find the G bit, I need to walk the GDT to find the LDT
> > > descriptor.
> > 
> > Why so?  The caller supplies you with the LDT base and range, not a
> > segment selector.  I don't think you could find the right LDT selector
> > by scanning the GDT anyway -- what if there were two that matched?
> 
> Because the range is interpreted in bytes or pages depending on the G
> bit in the descriptor.

The range is specified in _entries_.  Unless you intend to change the
interface, in which case, you could just ask for the descriptor.

Tim.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel