Re: [Xen-devel] [PATCH] This patch fixes several issues related to vmxassist

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 30 Mar 2006, at 17:09, Li, Xin B wrote:

> Changeset 9366 from Leendert is to support big real mode, in turn to
> support the SYSLINUX/ISOLINUX.
> so the address calculation is kludgy, the point here is to identify if 
> a
> cpu is in big real mode, if so, we should use protected mode addressing
> even in real mode.
Shouldn't we get the Xen portion of vmxassist help us with that, for 
example by making the hidden descriptor info (base, limit, etc) 
available to us? There's already a method for loading that stuff out of 
Xen, right?
Looks to me as though the kludge won't work if you unluckily load a 
real-mode segment value that happens to also reference a 'big segment' 
in the currently registered GDT.
 -- Keir


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel