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

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.



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.


Julien Grall

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