[trusty] [PULL] UBUNTU: fix no console in case of cloud environment

[Ming Lei]

On Tue, May 12, 2015 at 4:44 PM, Stefan Bader
<stefan.bader at canonical.com> wrote:
> On 12.05.2015 09:03, Ming Lei wrote:
>> In current arm64 Trusty cloud image, the 'console=' parameter
>> has been removed from grub config, and always resort to 'stdout'
>> DT property which is setup from QEMU.
>>
>> Unfortunately parsing 'stdout' DT property is just merged to 3.19
>> kernel, so there is no console usable any more for arm64 Trusty
>> VM when booting via uefi/grub.
>>
>> 9 of 10 patches are cherry picked from 3.19 to trusty, and the
>> other one is backported by just dropping the dt self-test code, and
>> with these 10 patches, arm64 Trusty VM can be booted with console
>> usable via uefi/grub.
>
> Ming (or whoever knows the answer), I am wondering why this series has to go
> into 3.13 when IIRC we just accepted the same into 3.16 (Utopic) which is the
> HWE kernel for Trusty...

Yes, but the cloud image doesn't ship HWE kernel.

Thanks,
Ming Lei

>
> -Stefan
>
>>
>> BugLink: http://bugs.launchpad.net/bugs/1438585
>>
>> SRU Justification:
>>     Impact: no console if arm64 trusty based VM is booted from the cloud image
>>     Fix: backport stdout enablement patches from upstream
>>     Testcase: boot one arm64 trusty VM via uefi/grub
>>
>> So please pull the top 10 patches from below tree/branch:
>>
>>      git://kernel.ubuntu.com/git/ming/ubuntu-trusty.git  stdout_support
>>
>>
>> 120c28c of: support passing console options with stdout-path
>> 1a3d0e7 of: add optional options parameter to of_find_node_by_path()
>> f29d72d of: Add bindings for chosen node, stdout-path
>> 98cbe35 of: correct of_console_check()'s return value
>> ecadb06 of: Enable console on serial ports specified by /chosen/stdout-path
>> 30f9087 of: Create of_console_check() for selecting a console specified in /chos
>> 0ac7353 of: Make of_find_node_by_path() handle /aliases
>> 7c7e998 of: Create unlocked version of for_each_child_of_node()
>> 651599f lib: add glibc style strchrnul() variant
>> f26ae5f of: Add support for ePAPR "stdout-path" property
>>
>> Thanks,
>> Ming Lei
>>
>
>