Re: [Qemu-devel] [PATCH v2 4/6] tests/acceptance: Add a BootLinuxConsoleMips test

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

On 07/04/2018 05:47 PM, Eduardo Habkost wrote:
> On Wed, Jul 04, 2018 at 04:56:44PM -0300, Philippe Mathieu-Daudé wrote:
>> On 06/28/2018 07:45 PM, Philippe Mathieu-Daudé wrote:
>>> On 06/28/2018 03:36 PM, Alex Bennée wrote:
>>>> Philippe Mathieu-Daudé <f4bug@amsat.org> writes:
>>>>> On 06/28/2018 01:23 PM, Alex Bennée wrote:
> [...]
>>>>>>> +    def test(self):
>>>>>>> +        kernel_url = ('http://people.debian.org/~aurel32/qemu/mips/'
>>>>>>> +                      'vmlinux-3.2.0-4-4kc-malta')
>>>>>>> +        kernel_hash = '592e384a4edc16dade52a6cd5c785c637bcbc9ad'
>>>>>>> +        kernel_path = self.fetch_asset(kernel_url,
>>>>>>> asset_hash=kernel_hash)
>>>>>>
>>>>>> I'm uncomfortable using "random" binaries of websites as the source of
>>>>>> our test kernels. I can see the justification for distro kernels as they
>>>>>> at least have the infrastructure to rebuild from source if you really
>>>>>> want to, but even then the distros don't cover a lot of the
>>>>>> architectures.
>>
>> Alex: I could find all the Linux kernel I'm interested to console-test
>> with Avocado on the http://snapshot.debian.org/ archive website.
>>
>> For example Aurelien's one (more up-to-date) is available here:
>> http://snapshot.debian.org/package/linux-2.6/2.6.32-48/#linux-image-2.6.32-5-4kc-malta_2.6.32-48
>>
>> I also added a SH-4 test for the SM501 series of Zoltan BALATON using
>> the kernel extracted from this distrib built kernel:
>> http://snapshot.debian.org/package/linux-2.6/2.6.32-30/#linux-image-2.6.32-5-sh7751r_2.6.32-30
>>
>> The Debian distribution also provide the source package and the kernels
>> can be simply rebuilt using make-kpkg or (make bindeb-pkg with more
>> recent kernels).
>>
>> Would it be enough to satisfy the GPL requirements to provided that info
>> in the header and use these handy pre-compiled kernels?
> 
> (IANAL, etc.)
> 
> Personally, I would try to avoid dealing with the "written offer"
> option of the GPL, and just publish the sources in the same
> medium (HTTP download repository, git repository, etc) as the
> binary.

About Debian packaged kernel: the sources are in the same directory:

http://snapshot.debian.org/package/linux-2.6/2.6.32-30/

linux-2.6_2.6.32.orig.tar.gz
linux-image-2.6.32-5-sh7751r_2.6.32-30_sh4.deb
linux-support-2.6.32-5_2.6.32-30_all.deb

The other way, trying to compile a 2013 kernel is painful because the
oldest GCC I succeed installing complain about many errors.

The next absurd option I have is install a 2013 userland distrib and use
qemu-user to cross^H^H^H^H(?? I dunno how to name it)-compile this
kernel.... "backward-compile"? This might make sens with the coming
quantum computers.

> There was a related discussion about distribution of firmware
> binaries at <https://www.mail-archive.com/qemu-devel@nongnu.org/msg475674.html>.
> It looks like we never applied the docs/firmware.txt patch,
> though.

This case is not about firmware we need to run QEMU, but Linux kernel to
run acceptance tests using QEMU. But same legal stuffs, you know...