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From: Julien Grall <julien.grall@arm.com>
To: Lars Kurth <lars.kurth@citrix.com>,
	Stefano Stabellini <sstabellini@kernel.org>
Cc: "tee-dev@lists.linaro.org" <tee-dev@lists.linaro.org>,
	"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
	Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>
Subject: Re: [Xen-devel] [PATCH v6 02/10] xen/arm: optee: add OP-TEE header files
Date: Wed, 19 Jun 2019 11:26:15 +0100
Message-ID: <f64b8514-bbfa-6cc6-21bb-0dc928ddf385@arm.com> (raw)
In-Reply-To: <FFA82A74-1DD5-48EE-B326-E298BDC23B1D@citrix.com>

Hi Lars,

On 19/06/2019 09:20, Lars Kurth wrote:
> 
> 
> On 17/06/2019, 18:28, "Stefano Stabellini" <sstabellini@kernel.org> wrote:
> 
>      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.
> 
> That is not really how this works. The resulting Xen binary would be GPL 2.0, while individual parts of the source tree can be of different licenses.
>      
>      > 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.
>      
> It is definitely OK: see http://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=CONTRIBUTING

Thank you for the input! I will add a word in the commit message:

"Note the imported header is licensed BSD-2-clause. This is fine as it is 
compatible with GPLv2-only".

Cheers,

-- 
Julien Grall

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  reply index

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-11 18:46 [Xen-devel] [PATCH v6 00/10] TEE mediator (and OP-TEE) support in XEN Volodymyr Babchuk
2019-06-11 18:46 ` [Xen-devel] [PATCH v6 01/10] xen/arm: add generic TEE mediator framework Volodymyr Babchuk
2019-06-17 16:11   ` Stefano Stabellini
2019-06-11 18:46 ` [Xen-devel] [PATCH v6 02/10] xen/arm: optee: add OP-TEE header files Volodymyr Babchuk
2019-06-15 18:39   ` Julien Grall
2019-06-17 15:24     ` Julien Grall
2019-06-17 16:28       ` Stefano Stabellini
2019-06-17 16:34         ` Julien Grall
2019-06-17 17:28           ` Stefano Stabellini
2019-06-19  8:20             ` Lars Kurth
2019-06-19 10:26               ` Julien Grall [this message]
2019-06-11 18:46 ` [Xen-devel] [PATCH v6 03/10] xen/arm: optee: add OP-TEE mediator skeleton Volodymyr Babchuk
2019-06-19 11:01   ` Julien Grall
2019-06-19 11:03     ` Julien Grall
2019-06-19 15:44       ` Volodymyr Babchuk
2019-06-11 18:46 ` [Xen-devel] [PATCH v6 04/10] xen/arm: optee: add fast calls handling Volodymyr Babchuk
2019-06-11 18:46 ` [Xen-devel] [PATCH v6 05/10] xen/arm: optee: add std call handling Volodymyr Babchuk
2019-06-11 18:46 ` [Xen-devel] [PATCH v6 06/10] xen/arm: optee: add support for RPC SHM buffers Volodymyr Babchuk
2019-06-11 18:46 ` [Xen-devel] [PATCH v6 07/10] xen/arm: optee: add support for arbitrary shared memory Volodymyr Babchuk
2019-06-11 18:46 ` [Xen-devel] [PATCH v6 08/10] xen/arm: optee: add support for RPC commands Volodymyr Babchuk
2019-06-11 18:46 ` [Xen-devel] [PATCH v6 09/10] tools/arm: tee: add "tee" option for xl.cfg Volodymyr Babchuk
2019-06-15 19:10   ` Julien Grall
2019-06-18 11:19     ` Volodymyr Babchuk
2019-06-18 12:49       ` Julien Grall
2019-06-18 14:30         ` Volodymyr Babchuk
2019-06-18 15:19           ` Julien Grall
2019-06-18 15:23             ` Volodymyr Babchuk
2019-06-19 10:30               ` Julien Grall
2019-06-11 18:46 ` [Xen-devel] [PATCH v6 10/10] tools/arm: optee: create optee firmware node in DT if tee=optee Volodymyr Babchuk
2019-06-19 11:08 ` [Xen-devel] [PATCH v6 00/10] TEE mediator (and OP-TEE) support in XEN Julien Grall

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