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Re: [XEN PATCH v2 3/5] xen/arm: configure dom0less domain for enabling xenstore after boot



Hi,

On 13/01/2022 14:15, Bertrand Marquis wrote:
Hi Stefano,

+ Penny in CC for the question.

On 13 Jan 2022, at 00:58, Stefano Stabellini <sstabellini@xxxxxxxxxx> wrote:

From: Luca Miccio <lucmiccio@xxxxxxxxx>

If "xen,enhanced" is enabled, then add to dom0less domains:

- the hypervisor node in device tree
- the xenstore event channel

The xenstore event channel is also used for the first notification to
let the guest know that xenstore has become available.

Signed-off-by: Luca Miccio <lucmiccio@xxxxxxxxx>
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>
CC: Julien Grall <julien@xxxxxxx>
CC: Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
CC: Bertrand Marquis <bertrand.marquis@xxxxxxx>

Reviewed-by: Bertrand Marquis <bertrand.marquis@xxxxxxx>

Just one question: GUEST_GNTTAB_BASE is fixed but could it be a problem for a 
direct map guest in the future ?
It will be an issue. I think we can re-use the same method as we do in dom0 (see find_gnttab_region()).

Cheers,

--
Julien Grall



 


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