WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-ia64-devel

Re: [Xen-ia64-devel] [PATCH] fix ptc.ga emulation

To: Kouya SHIMURA <kouya@xxxxxxxxxxxxxx>
Subject: Re: [Xen-ia64-devel] [PATCH] fix ptc.ga emulation
From: Alex Williamson <alex.williamson@xxxxxx>
Date: Fri, 13 Apr 2007 09:02:11 -0600
Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 13 Apr 2007 08:01:12 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <200704131254.l3DCsNBY030739@xxxxxxxxxxxxxxxxxxxxxxxxxx>
List-help: <mailto:xen-ia64-devel-request@lists.xensource.com?subject=help>
List-id: Discussion of the ia64 port of Xen <xen-ia64-devel.lists.xensource.com>
List-post: <mailto:xen-ia64-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-ia64-devel>, <mailto:xen-ia64-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-ia64-devel>, <mailto:xen-ia64-devel-request@lists.xensource.com?subject=unsubscribe>
Organization: HP OSLO R&D
References: <200704131254.l3DCsNBY030739@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Sender: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx
On Fri, 2007-04-13 at 22:06 +0900, Kouya SHIMURA wrote:
> ptc.ga infrequently clobbers the region register 0.
> 
> When vcpu1 purges TLBs of vcpu2 and
> ptc_ga_remote_func() is called locally not via IPI
> (i.e. vcpu1 shares the same pcpu with vcpu2),
> in ptc_ga_remote_func(),
>   save vrr[0] of vcpu2
>   ... => switch to vcpu2 and set a new value of vrr[0]
>   restore vrr[0] of vcpu2 // the new value is lost
> 
> Windows will crash due to this issue.

   Applied.  Thanks,

        Alex

-- 
Alex Williamson                             HP Open Source & Linux Org.


_______________________________________________
Xen-ia64-devel mailing list
Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-ia64-devel

<Prev in Thread] Current Thread [Next in Thread>