Mailing List Archive: Sample backend/frontend driver

Sample backend/frontend driver

Jul 29, 2020, 7:46 AM

Post #1 of 3 (270 views)

Hi All ,
I am starting with Xen for internal evaluation.

- Can team share some input / pointers to understand the
architecture / template to understand the frontend or backend driver of
xen

- I had cloned the latest version of xen code ( which is 4.13 )
But could not find any usage of
* xenbus_register_frontend / xenbus_register_backend*
$ grep -nisr xen-4.13.1/* -e 'xenbus_register_frontend' ( No
result )
$ grep -nisr xen-4.13.1/* -e 'xenbus_register_backend' ( No
result )
I was going through https://wiki.xen.org/wiki/Introduction_to_Xen_3.x
to understand the binding of the frontend / backend driver

- My aim was to understand an existing code for frontend & backend
and write an hello-world kind of module.

Please do let me know if I am missing anything here or doing completely
wrong here .

Thanks ,
Ashish .

Re: Sample backend/frontend driver [ In reply to ]

jgross at suse

Jul 29, 2020, 8:00 AM

Post #2 of 3 (270 views)

Permalink

On 29.07.20 16:46, AshishKumar Mishra wrote:
> Hi All ,
> I am starting with Xen for internal evaluation.
>
> - Can team share some input / pointers to understand the
>    architecture / template to understand the frontend or backend driver
> of xen
>
>
> - I had cloned the latest version of xen code ( which is 4.13 )
> But could not find any usage of *
> *
> * xenbus_register_frontend / xenbus_register_backend*
>           $ grep -nisr xen-4.13.1/* -e 'xenbus_register_frontend' ( No
> result )
>           $ grep -nisr xen-4.13.1/* -e 'xenbus_register_backend' ( No
> result )
> I was going through https://wiki.xen.org/wiki/Introduction_to_Xen_3.x
> to understand the binding of the frontend / backend driver
> - My aim was to understand an existing code for frontend & backend
> and write an hello-world kind of module.
> Please do let me know if I am missing anything here or doing completely
> wrong here .

The frontend and backend drivers are not part of Xen, but of the guests
containing the backends (usually dom0) or the frontends.

So you have to look e.g. into The Linux kernel sources where you'll find
both, backends and frontends.

There are some backends in qemu, too. And then there are unikernels like
mini-os and unikraft containing frontends.

Juergen

Re: Sample backend/frontend driver [ In reply to ]

ashish.emailaddress at gmail

Jul 29, 2020, 10:57 PM

Post #3 of 3 (268 views)

Permalink

Thanks for pointer , will look into it.

Ashish