Re: [Xen-devel] [PATCH v1 5/6] libxl: create DTS node for OP-TEE if it is enabled

[Julien Grall <julien.grall@xxxxxxx>]

Hi,

On 08/23/2018 03:03 PM, Volodymyr Babchuk wrote:
> Hi,
>
> On 22.08.18 20:32, Julien Grall wrote:
> > Hi,
> >
> > On 22/08/18 15:11, Volodymyr Babchuk wrote:
> > > Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>
> > I am a bit confused. The DT is only here to tell the guest OP-TEE is 
> > present. But I don't see anything to tell the hypervisor the guest 
> > will use OP-TEE.
> Yes, this is what I wanted to discuss. I had a felling that it is not 
> quite right. I think your idea with DOMCTL is better. I'll rework this 
> part in the  following way:
> if there is "optee=1" in a config file, then libxl will create DT entry 
> and ask hypervisor to enable access to TEE for this domain.
You probably also want to make the variable TEE agnostic by renaming to 
"tee".
In the future, the toolstack would need to know which TEE is in used in 
the hypervisor. For now, it is fine to assume that it is OP-TEE.
Cheers,

--
Julien Grall

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