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Re: [PATCH] tcg/LICENSE: Remove no-longer-true statement that TCG is BSD
From: |
Laszlo Ersek |
Subject: |
Re: [PATCH] tcg/LICENSE: Remove no-longer-true statement that TCG is BSD-licensed |
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 |
(+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 <address@hidden>
>> ---
>> 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.
>
> I think this is the best solution. I've never been convinced that TCG can
> 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=uxvAH1Q4Mx0
If I remember correctly, they specifically picked a git commit hash that
was still purely BSD licensed.
FWIW,
<https://github.com/ardbiesheuvel/X86EmulatorPkg/blob/master/LICENSE> 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not any BSD license, so I'm almost surely out of date on that aspect;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 <address@hidden>
>
>
> r~
>
Re: [PATCH] tcg/LICENSE: Remove no-longer-true statement that TCG is BSD-licensed, Peter Maydell, 2019/10/21