Re: [PATCH 2/3] xen/ppc: Implement early serial printk on PaPR/pseries

From: "Shawn Anastasio" <shawn@anastas.io>
To: "Julien Grall" <julien@xen.org>,
	"Andrew Cooper" <andrew.cooper3@citrix.com>,
	"Jan Beulich" <jbeulich@suse.com>
Cc: <tpearson@raptorengineering.com>,
	"George Dunlap" <george.dunlap@citrix.com>,
	"Stefano Stabellini" <sstabellini@kernel.org>,
	"Wei Liu" <wl@xen.org>,
	"Shawn Anastasio" <shawnanastasio@raptorengineering.com>,
	<xen-devel@lists.xenproject.org>
Subject: Re: [PATCH 2/3] xen/ppc: Implement early serial printk on PaPR/pseries
Date: Fri, 09 Jun 2023 10:01:38 -0500	[thread overview]
Message-ID: <CT87KSPVSBUG.2C4SWW2EDTA5Z@Shawns-Mac-mini.lan> (raw)
In-Reply-To: <bcbab76d-ca8c-0772-3a9f-59fef3a2b5f5@xen.org>

On Fri Jun 9, 2023 at 5:12 AM CDT, Julien Grall wrote:
> Strictly speaking we can refuse any code. That count for license as 
> well. Anyway, I didn't request a change here. I merely pointed out that 
> any use of GPLv2+ should be justified because on Arm most of the people 
> don't pay attention on the license and pick the one from an existing file.

Hi Julien,

The choice of GPLv2+ for many of the files in this patchset was indeed
inherited from old IBM-written Xen code that the files in question were
derived from. I did not realize it was permissible or even desirable to
relicense those to GPLv2-only.

As for the new files, GPLv2+ was chosen to remain consistent and to open
the door for future derivations from GPLv2+ licensed code, either from
the older Xen tree or from the Linux ppc tree, much of which is also
licensed as GPLv2+. If it would reduce friction, these files could be
relicensed to GPLv2-only.

Thanks,
Shawn