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

Re: [Xen-devel] [PATCH] Create XEN_DOMCTL_set_opt_feature

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] Create XEN_DOMCTL_set_opt_feature
From: "Daniel P. Berrange" <berrange@xxxxxxxxxx>
Date: Wed, 28 Nov 2007 17:44:37 +0000
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxx>, xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Wed, 28 Nov 2007 09:45:55 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <C3735853.19245%Keir.Fraser@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>
References: <1196271074.7687.24.camel@lappy> <C3735853.19245%Keir.Fraser@xxxxxxxxxxxx>
Reply-to: "Daniel P. Berrange" <berrange@xxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mutt/1.4.1i
On Wed, Nov 28, 2007 at 05:39:31PM +0000, Keir Fraser wrote:
> On 28/11/07 17:31, "Alex Williamson" <alex.williamson@xxxxxx> wrote:
> 
> >    This patch goes along with the guest_os_type domain config patch.
> > Once we know what the guest OS is in the builder code, we need a
> > mechanism to set optimization features for that guest.  This is done via
> > a new XEN_DOMCTL as shown in the patch below.  This only has ia64
> > specific contents at the moment, but could be expanded for x86.  I
> > expect the contents of the structure will mostly be architecture
> > specific.  Thanks,
> 
> If you use this in the builder, why do you need a hvm param at all? In any
> case I don't like the encoding of OS strings into hvm_param integers. Either
> the concept of 'OS type' should not be visible to Xen, or a proper
> enumeration should be defined, or if you want a string then the builder
> should stick it in memory for your virtual boot firmware to pick up.

I agree. The concept of 'OS type' has no business being present in the
hypervisor/low level APIs at all.  That is an end-user facing concept,
which high level management tools translate to a specific set of low
level features/capabilities. The hypervisor / low level APIs should 
have explicit features/capabilities.  

eg, virt-manager has a concept of OS type - if you choose 'Windows' it
will pass appropriate config to XenD to add a USB tablet, set QEMU to 
'localtime', and a handful of other things. 

Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
|=-  GnuPG: 7D3B9505   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=| 

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