Re: [Xen-devel] [PATCH v6 02/10] xen/arm: optee: add OP-TEE header files

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Mon, 17 Jun 2019, Julien Grall wrote:
> On 17/06/2019 17:28, Stefano Stabellini wrote:
> > Looking at https://www.gnu.org/licenses/license-list.en.html and also
> > looking at the usage in the Linux kernel, I am pretty sure it is
> > compatible. However, given that the Xen hypervisor as a whole is GPLv2,
> > I think it would be more precise to say:
> > 
> > SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> 
> Well, this is imported from OP-TEE. So I don't think we have the freedom to
> change this copyright header here...

Interesting point: I would have thought that given that this is a GPLv2
project, if we went with SPDX, all files would need to have a
GPL-2.0-only tag on them, plus, optionally, an OR XXX clause.

Something for Lars to investigate.


> What I was asking is whether this is OK to import BSD-2-Clause code in Xen.
> You seem to agree that it should be possible.

Yep. The problematic BSD license is the BSD-4-Clause.


> I will give a chance to Lars to answer. I will commit #1-8 tomorrow evening.

+1

 
> > 
> > 
> > On Mon, 17 Jun 2019, Julien Grall wrote:
> > > hmm, I forgot to CC lars. Sorry for that.
> > > 
> > > Cheers,
> > > 
> > > On 15/06/2019 19:39, Julien Grall wrote:
> > > > (+ Lars)
> > > > 
> > > > Hi,
> > > > 
> > > > On 6/11/19 7:46 PM, Volodymyr Babchuk wrote:
> > > > > diff --git a/xen/include/asm-arm/tee/optee_msg.h
> > > > > b/xen/include/asm-arm/tee/optee_msg.h
> > > > > new file mode 100644
> > > > > index 0000000000..fe743dbde3
> > > > > --- /dev/null
> > > > > +++ b/xen/include/asm-arm/tee/optee_msg.h
> > > > > @@ -0,0 +1,310 @@
> > > > > +/* SPDX-License-Identifier: BSD-2-Clause */
> > > > 
> > > > Hmmm, sorry I haven't noticed it until now (SDPX is more explicit that
> > > > the
> > > > full-blown license). I suspect this is fine to have BSD-2 Clause license
> > > > in
> > > > Xen but I want to confirmation from someone knowing more than me about
> > > > license compatibility. Lars?
> > > > 
> > > > If this is fine, then I would like to add a word in the commit message
> > > > (I am
> > > > happy to do that on commit).
> > > > 
> > > > Cheers,
> > > > 
> > > 
> > > -- 
> > > Julien Grall
> > > 
> 
> -- 
> Julien Grall
> 

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