Re: [Xen-devel] [PATCH v7] acpi: Prevent GPL-only code from seeping into non-GPL binaries

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Sep 27, 2016 at 10:46:18AM -0400, Boris Ostrovsky wrote:
> Some code (specifically, introduced by commit 801d469ad ("[HVM] ACPI
> support patch 3 of 4: ACPI _PRT table.")) has only been licensed under
> GPLv2. We want to prevent this code from showing up in non-GPL
> binaries which might become possible after we make ACPI builder code
> available to users other than hvmloader.
> 
> There are two pieces that we need to be careful about:
> (1) A small chunk of code in dsdt.asl that implements _PIC method
> (2) A chunk of ASL generator in mk_dsdt.c that describes with PCI
>     interrupt routing.
> 
> This code will now be generated by a GPL-only script which will be
> invoked only when ACPI builder's Makefile is called with GPL variable
> set.
> 
> We also strip license header from generated ASL files to prevent
> inadverent use of those files with incorrect license.
> 
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>

Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>

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