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Tue, 10 Sep 2019 16:16:16 +0000 To: =?iso-8859-1?Q?Alex_Benn=E9e?= Thread-Topic: [Qemu-devel] [PATCH v4 00/54] plugins for TCG Thread-Index: AQHVR7oKDi2UmAnU9ESAxN4sONh176blsS39gDmYj4CABgzzgA== Date: Tue, 10 Sep 2019 16:16:16 +0000 Message-ID: <20190910161615.GA20976@quinoa.localdomain> References: <20190731160719.11396-1-alex.bennee@linaro.org> <87a7cty0tv.fsf@dusky.pond.sub.org> <875zm5yzgq.fsf@linaro.org> In-Reply-To: <875zm5yzgq.fsf@linaro.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: CY4PR16CA0019.namprd16.prod.outlook.com (2603:10b6:903:102::29) To DM6PR01MB6027.prod.exchangelabs.com (2603:10b6:5:1da::25) authentication-results: spf=none (sender IP is ) smtp.mailfrom=aaron@os.amperecomputing.com; x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [65.190.6.212] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: d6fe4c1e-718f-45d8-8e7f-08d7360a34f6 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600166)(711020)(4605104)(1401327)(2017052603328)(7193020); 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charset="iso-8859-1" Content-ID: <7B9F1D598F362C41BE55B25443DE1743@prod.exchangelabs.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: os.amperecomputing.com X-MS-Exchange-CrossTenant-Network-Message-Id: d6fe4c1e-718f-45d8-8e7f-08d7360a34f6 X-MS-Exchange-CrossTenant-originalarrivaltime: 10 Sep 2019 16:16:16.5498 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3bc2b170-fd94-476d-b0ce-4229bdc904a7 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: ljxPjyd0r7VPIaIsy+uxqQ75gazJS/OdQeJ5cL52ODHOKelCneAD6TyeZPHa5n/cG5VLkmep6fdq08GVKoDvyFWuj5vKB4rOnVrOsYTAkns= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR01MB5146 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 2a01:111:f400:fe49::713 Subject: Re: [Qemu-devel] [PATCH v4 00/54] plugins for TCG X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Aaron Lindsay OS via Qemu-devel Reply-To: Aaron Lindsay OS Cc: "bobby.prani@gmail.com" , "cota@braap.org" , Markus Armbruster , "qemu-devel@nongnu.org" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Sep 06 20:52, Alex Benn=E9e wrote: >=20 > Markus Armbruster writes: > > Please advise why TCG plugins don't undermine the GPL. Any proposal to > > add a plugin interface needs to do that. >=20 > I'm not sure what we can say about this apart from "ask your lawyer". > I'm certainly not proposing we add any sort of language about what > should and shouldn't be allowed to use the plugin interface. I find it > hard to see how anyone could argue code written to interface with the > plugin API couldn't be considered a derived work. I am not a lawyer, but I would not have expected software merely using a well-defined API to be considered a derivative work of the software defining it. Unless, of course, it is a derivative work of another plugin using the same interface in a way that is not necessitated by the structure of the API. What's your reasoning for why it would be a derivative work? Is your belief that the plugin API is complex enough that anything using it has to be a derivative work, or something else? That said, I'm not sure I understand in what way adding a plugin interface would undermine the GPL, so maybe I'm missing the point. -Aaron