Xen devel - Sep 2008 - Documentation for adding a config file platform parameter

Is there any documentation on how to add a new
platform parameter to a guest config file?  I
looked around on xensource.com a bit and searched
through the email lists, but nothing obvious came
up.

I did figure out how to add one to the python
files for xend, but I can''t figure out how the
python files take the parsed data and passes it
into the hypervisor.

Any pointers would be appreciated.  Thank you.

-Mark Langsdorf
Operating System Research Center
AMD


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It''s done ad hoc. Do you actually want a new HVM_PARAM_foo at the
hypervisor
level?

 -- Keir

On 18/9/08 19:10, "Langsdorf, Mark" <mark.langsdorf@amd.com>
wrote:
> Is there any documentation on how to add a new
> platform parameter to a guest config file?  I
> looked around on xensource.com a bit and searched
> through the email lists, but nothing obvious came
> up.
> 
> I did figure out how to add one to the python
> files for xend, but I can''t figure out how the
> python files take the parsed data and passes it
> into the hypervisor.
> 
> Any pointers would be appreciated.  Thank you.
> 
> -Mark Langsdorf
> Operating System Research Center
> AMD
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel


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> It''s done ad hoc. Do you actually want a new
> HVM_PARAM_foo at the hypervisor level?
Thanks for the quick response.

We''re adding a feature that needs a user defined
parameter to be placed in the VMCB for each guest.
This parameter can be different for each guest.
It looked to me like that was a platform parameter,
but maybe it should be something else.

At any rate, if I add a new key to the config
file (call it ''svm_new_feat''), how do I get the
value of svm_new_feat assigned to the integer
value of SVM_PARAM_new_feat inside of Xen?

-Mark Langsdorf
Operating System Research Center
AMD

> On 18/9/08 19:10, "Langsdorf, Mark"
<mark.langsdorf@amd.com> wrote:
> 
> > Is there any documentation on how to add a new
> > platform parameter to a guest config file?  I
> > looked around on xensource.com a bit and searched
> > through the email lists, but nothing obvious came
> > up.
> > 
> > I did figure out how to add one to the python
> > files for xend, but I can''t figure out how the
> > python files take the parsed data and passes it
> > into the hypervisor.
> > 
> > Any pointers would be appreciated.  Thank you.
> > 
> > -Mark Langsdorf
> > Operating System Research Center
> > AMD
> > 
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xensource.com
> > http://lists.xensource.com/xen-devel
> 
> 
> 
> 

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On 18/9/08 19:26, "Langsdorf, Mark" <mark.langsdorf@amd.com>
wrote:
>> It''s done ad hoc. Do you actually want a new
>> HVM_PARAM_foo at the hypervisor level?
> 
> Thanks for the quick response.
> 
> We''re adding a feature that needs a user defined
> parameter to be placed in the VMCB for each guest.
> This parameter can be different for each guest.
> It looked to me like that was a platform parameter,
> but maybe it should be something else.
mmm.... how mysterious. Am I going to like it? ;-)
> At any rate, if I add a new key to the config
> file (call it ''svm_new_feat''), how do I get the
> value of svm_new_feat assigned to the integer
> value of SVM_PARAM_new_feat inside of Xen?
See use of xc.hvm_set_param() in xen/xend/image.py.

 -- Keir



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