Re: [Xen-devel] [PATCH 1/2] xen: arm64: doc: Add the requirement that SCR_EL3.HCE is enabled

[Julien Grall <julien.grall@xxxxxxx>]

Hi Dirk,

On 22/04/2016 07:23, Dirk Behme wrote:
> On 20.04.2016 15:21, Julien Grall wrote:
> > I would create a specific section in this documentation to list what the
> > firmware should do in EL3 before starting Xen.
>
> Done:
>
> http://lists.xen.org/archives/html/xen-devel/2016-04/msg02687.html
Thank you, I will look at it soon.

> > In addition to this patch, I would add a check in Xen to make sure the
> > Hyp calls have been enabled by the firmware.
>
> Hmm, I have to re-read the documentation how to do this in EL2. We can't
> read SCR_EL3 in EL2?
Oh yes. sorry I would have thought the register would be exposed RO to EL2.

Regards,

--
Julien Grall

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