[Saucy Raring SRU] Add Haswell CPU models

[Stefan Bader]

On 10.02.2014 16:48, Luis Henriques wrote:
> On Mon, Feb 10, 2014 at 06:19:31AM +0000, Zhang, Xiong Y wrote:
>> Impact: Since Saucy and Raring distribution can support Haswell CPU.
>>        But intel_pstate driver in these distributions can't support Haswell CPU.
>>
>> Fix: Add Haswell CPU models to intel_pstate driver
>>
>> Upstream commit:
>> commit 6cdcdb793791f776ea9408581b1242b636d43b37
>> Author: Nell Hardcastle <nell at spicious.com>
>> Date:   Sun Jun 30 15:58:57 2013 -0700
>>
>> intel_pstate: Add Haswell CPU models
>>
>>
>> Two bug fix commits in intel_pstate driver are valuable to do backport.
>>
>> 1.       7244cb6 intel_pstate: Correct calculation of min pstate value
>>
>> 2.       d253d2a intel_pstate: Improve accuracy by not truncating until final result
>>
>> thanks
> 
> I have these 3 commits (plus an additional one: fcb6a15 "intel_pstate:
> Take core C0 time into account for core busy calculation") already queued
> for the 3.11 kernel as per request of Dirk Brandewie in the upstream
> stable mailing list.  This means that, in a future SRU cycle, these will
> hit the Ubuntu Saucy kernel.
> 
> Kamal, could you please check the status of these patches for the 3.8
> kernel (which will be included in the lts-backport-raring kernel)?
> 
> Cheers,
> --
> Luis
> 
When chatting with Colin this morning we were thinking that this would probably
need the user-space driver to be backported/MRU? into Precise in order to be
useful. Not sure we have thought about this...

-Stefan

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