Public bug reported:

[Impact]

Mesa 10.1.x doesn't enable support for CHV/BSW, like it didn't for
Broadwell. Enabling it needs five commits backported from 10.2:

70285f607ce2a06 i965: initialize more device info fields for Cherryview
9b6b084eb7b10d0 i965: Add Cherryview support.
850e372fc7ff337 i965: Drop bogus F32TO16/F16TO32 instructions on Broadwell - 
use MOV.
a5e54c91a3b7355 i965: Store absolute thread count in max_wm_threads on 
Broadwell.
dca84b4b5b23b68 i965: Use MOV, not OR for setting URB write channel enables on 
Gen8+.

[Test Case]
install trusty on a BSW machine, unity falls back to software rendering which 
is slow.

[Regression potential]
Slim, since it enables new HW, and though some commits are shared with BDW 
(they are both gen8) they are bugfixes.

** Affects: mesa (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1404217

Title:
  Backport support for Cherryview/Braswell

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