[Xen-devel] Re: Grant Table Issue

To:	xen-devel@xxxxxxxxxxxxxxxxxxx
Subject:	[Xen-devel] Re: Grant Table Issue
From:	"ashoka xen" <ashoka.xen@xxxxxxxxx>
Date:	Thu, 29 May 2008 19:08:16 +0530
Delivery-date:	Thu, 29 May 2008 06:38:51 -0700
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Sorry for trouble. It was my mistake.
gnttab_grant_foreign_access requires Dom0's domain id
whereas gnttab_set_map_op requires DomU's domain id.

Regards,
Ashoka

On Thu, May 29, 2008 at 3:31 PM, ashoka xen <ashoka.xen@xxxxxxxxx> wrote:

Hello

I am facing a problem in using grant tables. DomU allocates a page and passes grant reference to Dom0. When Dom0 tries to map the shared page, it gives following error:

(XEN) grant_table.c:264:d0 Bad flags (1) or dom (1). (expected dom 0)

Here DomU (id 1) shared a page for read-write access and Dom0 tried to map it using GNTMAP_host_map, read-write access. CPU is x86, PAE enabled, tried Xen-3.1.3 and Xen-3.1.4. - same error for both.

If same code is written in two modules - one for DomU and other for Dom0. First a module is inserted into DomU and later other module is inserted into Dom0, the code works fine.

When searched for similar problem, I found following link:

http://lists.xensource.com/archives/html/xen-ppc-devel/2006-06/msg00234.html

Is this a similar problem ?

Regards,
Ashoka

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