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Mon, 21 Oct 2019 17:57:27 +0000 (UTC) Subject: Re: [PATCH] tcg/LICENSE: Remove no-longer-true statement that TCG is BSD-licensed To: Richard Henderson , Peter Maydell , qemu-devel@nongnu.org References: <20191021145839.12684-1-peter.maydell@linaro.org> <06e15851-0b4e-63c3-001d-dd7ea5855872@linaro.org> From: Laszlo Ersek Message-ID: <5dc0737a-f1b0-24aa-015a-1806a6d61e69@redhat.com> Date: Mon, 21 Oct 2019 19:57:25 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <06e15851-0b4e-63c3-001d-dd7ea5855872@linaro.org> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-MC-Unique: FMlMBTpFPTWJJLhQ18dvYg-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 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: , Cc: Claudio Fontana , Ard Biesheuvel , Alexander Graf , Markus Armbruster , Stefan Hajnoczi , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" (+Ard, Alex) On 10/21/19 17:52, Richard Henderson wrote: > On 10/21/19 7:58 AM, Peter Maydell wrote: >> Since 2008 the tcg/LICENSE file has not changed: it claims that >> everything under tcg/ is BSD-licensed. >> >> This is not true and hasn't been true for years: in 2013 we >> accepted the tcg/aarch64 target code under a GPLv2-or-later >> license statement. We don't really consider the tcg >> subdirectory to be a distinct part of QEMU anyway. >> >> Remove the LICENSE file, since claiming false information >> about the license of the code is confusing, and update >> the main project LICENSE file also to be clearer about >> the license used by TCG. >> >> Signed-off-by: Peter Maydell >> --- >> This patch takes the simple approach of just documenting >> the de-facto current reality; does anybody want to argue >> for something else? Other possibilities I guess would be >> specifically documenting tcg/aarch64 as an accidental >> exception to the general licensing rule for tcg/, or even >> trying to get it relicensed. >> >> Does having tcg/ be BSD-licensed gain the project anything? >> From my point of view I don't really see it as a cleanly >> separable module of code -- it's quite tightly integrated >> with the rest of QEMU, including code in accel/tcg which >> is variously GPL or LGPL. >=20 > I think this is the best solution. I've never been convinced that TCG ca= n > usefully be extracted and reused for something else. Side comment: Ard and Alex extracted TCG to run x86 PCIe UEFI option ROMs on aarch64 hardware. https://github.com/ardbiesheuvel/X86EmulatorPkg https://kvmforum2017.sched.com/event/Bo0S/qemu-in-uefi-alexander-graf-suse https://www.youtube.com/watch?v=3DuxvAH1Q4Mx0 If I remember correctly, they specifically picked a git commit hash that was still purely BSD licensed. FWIW, is not any BSD license, so I'm almost surely out of date on that aspect; just wanted to confirm that TCG has been usefully extracted. Thanks, Laszlo > Reviewed-by: Richard Henderson >=20 >=20 > r~ >=20