xen-devel

[Top] [All Lists]

[Xen-devel] Re: One question on mcinfo_extended

from [Jan Beulich]

[Permanent Link][Original]

To:	<yunhong.jiang@xxxxxxxxx>
Subject:	[Xen-devel] Re: One question on mcinfo_extended
From:	"Jan Beulich" <jbeulich@xxxxxxxxxx>
Date:	Tue, 20 Apr 2010 09:38:33 +0100
Cc:	xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date:	Tue, 20 Apr 2010 01:39:19 -0700
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxxx
List-help:	<mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id:	Xen developer discussion <xen-devel.lists.xensource.com>
List-post:	<mailto:xen-devel@lists.xensource.com>
List-subscribe:	<http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe:	<http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender:	xen-devel-bounces@xxxxxxxxxxxxxxxxxxx

The point of using void* here is that even in a 32-bit Dom0 running on 64-bit 
Xen should have access to all registers - I couldn't think of anything better 
back then. The implication is that Dom0 side code must be prepared to deal with 
that - which I think isn't the case at present.

Jan

>>> "Jiang, Yunhong"  04/20/10 10:20 AM >>>
Hi, Jan, in 19465 changeset, the mcinfo_extended's mc_msr is changed to be an 
array of sizeof(void *) * 4. I assume your purpose is to make it works on both 
32 and 64. But will it cause trouble to compatibility mode dom0? Especially if 
dom0 copy the information to local variable, and loop the variable through 
mcinfo_extended->mc_msrs?

Thanks
--jyh


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

[More with this subject...]

<Prev in Thread]	Current Thread	[Next in Thread>
[Xen-devel] Re: One question on mcinfo_extended, Jan Beulich <= [Xen-devel] RE: One question on mcinfo_extended, Jiang, Yunhong

Previous by Date:	Re: [Xen-devel] [PATCH 3/4] libxl: add version_info function [and 1 more messages], Vincent Hanquez
Next by Date:	Re: [Xen-devel] domU is causing misaligned disk writes, Pasi Kärkkäinen
Previous by Thread:	[Xen-devel] domU is causing misaligned disk writes, Tracy Reed
Next by Thread:	[Xen-devel] RE: One question on mcinfo_extended, Jiang, Yunhong
Indexes:	[Date] [Thread] [Top] [All Lists]