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] [PATCH] Fixing iopl and ioperm

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
Subject: RE: [Xen-devel] [PATCH] Fixing iopl and ioperm
From: "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>
Date: Mon, 13 Jun 2005 16:06:34 -0700
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Mon, 13 Jun 2005 23:06:33 +0000
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/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>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AcVwaXK8N6xvUM3OQdePRmdyyiW1ZgAAVa6w
Thread-topic: [Xen-devel] [PATCH] Fixing iopl and ioperm
Keir Fraser wrote:
> On 11 Jun 2005, at 06:45, Nakajima, Jun wrote:
> 
>> With this patch, x86 and x86-64 share ioport.c, fixing LTP iopl and
>> ioperm testcase failures (on both). We found an iopl testcase
>> failing even on x86 xenlinux. 
>> 
>> Now x86-64 xenlinux should have the same results regarding the LTP
>> testcases (as far as we tested).
> 
> Why does this patch modify the i386 ioport.c so much? I would expect
> that you ought to be able to use the xen/i386 ioport.c with no
> modification at all. The different function prototypes for sys_iopl
> between i386 and x86_64 shouldn't matter -- x86_64 ought to work with
> teh existing xen/i386 function prototype and function implementation.
> 
That part is basically coming from the implementation of set_bitmap; x86
and x86-64 uses different implemenations. We'll try that in a sperate
patch; I think the x86-64 one is simpler.

Well I heard the current x86 (_not_ 64-bit) xenlinux failed one of LTP
iopl/ioperm testcases (and it passes on the native Linux). So I expect
some changes are required there. Maybe that patch should go first. I'll
double-check it.

Jun
---
Intel Open Source Technology Center

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