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-devel

Re: [Xen-devel] 32/64-bit hypercall interface

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] 32/64-bit hypercall interface
From: Hollis Blanchard <hollisb@xxxxxxxxxx>
Date: Tue, 4 Oct 2005 11:27:21 -0500
Cc: Jeremy Katz <katzj@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>, "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>, Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>
Delivery-date: Tue, 04 Oct 2005 16:25:54 +0000
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <393e84798f2e6ab1397d7408bb87ada1@xxxxxxxxxxxx>
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/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Organization: IBM Linux Technology Center
References: <A95E2296287EAD4EB592B5DEEFCE0E9D32E11A@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <200510031611.08338.hollisb@xxxxxxxxxx> <393e84798f2e6ab1397d7408bb87ada1@xxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: KMail/1.8.2
On Monday 03 October 2005 17:00, Keir Fraser wrote:
>
> The cost must also be paid by domains that don't require shadow page
> tables (32-bit on 32-bit, in particular).

The next sentence in my mail said that a normal hypercall would effectively 
have the same performance impact...

> The 64-bit dom0_op patch you posted misses 64-bit-ifying the page-frame
> arrays of GETMEMLIST and GETPAGEFRAMEINFO2. I had a go at 64-bit-ifying
> the dom0_op interface myself, and gave up at those two because they are
> particularly invasive to change.

Couldn't a field be added indicating the size of the resulting type? I have to 
run right now, but I'll think about it more.

-- 
Hollis Blanchard
IBM Linux Technology Center

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