Date: Wed, 22 Mar 2006 11:33:35 -0800
From: Chris Wright <chrisw@sous-sol.org>
To: Andi Kleen <ak@suse.de>
Cc: virtualization@lists.osdl.org, Chris Wright <chrisw@sous-sol.org>,
       linux-kernel@vger.kernel.org, xen-devel@lists.xensource.com,
       Ian Pratt <ian.pratt@xensource.com>
Subject: Re: [RFC PATCH 17/35] Segment register changes for Xen
Message-ID: <20060322193335.GD15997@sorel.sous-sol.org>
References: <20060322063040.960068000@sorel.sous-sol.org> <20060322063752.889921000@sorel.sous-sol.org> <200603221524.17388.ak@suse.de>
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* 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
-
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