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

[Xen-ia64-devel] RE: [PATCH] use shared version of iva/dcr

To: "Matt Chapman" <matthewc@xxxxxxxxxxxxxxx>
Subject: [Xen-ia64-devel] RE: [PATCH] use shared version of iva/dcr
From: "Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>
Date: Mon, 22 Aug 2005 09:56:57 -0700
Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Mon, 22 Aug 2005 16:55:34 +0000
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
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>
Sender: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AcWjofPRe5PESdR2RzqMF4fPcZHPwwDl9ufw
Thread-topic: [PATCH] use shared version of iva/dcr
For dcr, this may not matter, but for iva, there
are some semantics that need to be checked every
virtual interrupt delivery.  At a minimum, if virtual
iva is not private, bits 0-14 should be zeroed
before every use by Xen, correct?

> -----Original Message-----
> From: Matt Chapman [mailto:matthewc@xxxxxxxxxxxxxxx] 
> Sent: Wednesday, August 17, 2005 9:07 PM
> To: Magenheimer, Dan (HP Labs Fort Collins)
> Cc: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [PATCH] use shared version of iva/dcr
> 
> This patch makes Xen use the iva and dcr located in mapped_regs_t and
> eliminates the private versions in arch_domain.  There seems to be no
> reason to involve the hypervisor when accessing these registers, at
> worst the guest kernel can shoot itself in the foot.
> 
> Matt
> 
> Signed-off-by: Matthew Chapman <matthewc@xxxxxx>
> 

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

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