From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: [PATCH 0 of 5] PV on HVM Xen
Date: Tue, 16 Mar 2010 10:41:09 -0700
Message-ID: <4B9FC2B5.20103@goop.org>
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To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, Sheng Yang <sheng@linux.intel.com>
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On 03/16/2010 10:32 AM, Stefano Stabellini wrote:
> Actually I think Ian is right, we can do it without a new hypercall: if
> we assume tsc_mode=2 then this simple patch makes the pv clocksource work
> fine without any set_tsc_offset(v, 0) in xen:
>    

Can we detect if this patch is present in Xen or not?  If not, we may 
need to go back to having a feature flag.

     J