[Intel-gfx] [PATCH RFC] drm/i915: Pad GTT views of exec objects up to user specified size

[shuang.he at intel.com]

Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 6050
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                 -2              269/269              267/269
ILK                                  303/303              303/303
SNB                 -1              304/304              303/304
IVB                                  338/338              338/338
BYT                                  287/287              287/287
HSW                 -1              362/362              361/362
BDW                                  310/310              310/310
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
 PNV  igt at gem_userptr_blits@coherency-sync      CRASH(4)PASS(3)      CRASH(2)
 PNV  igt at gen3_render_linear_blits      FAIL(2)PASS(2)      FAIL(1)
*SNB  igt at pm_rpm@fences-dpms      PASS(2)      DMESG_WARN(1)PASS(1)
*HSW  igt at gem_pwrite_pread@snooped-copy-performance      PASS(2)      DMESG_WARN(1)PASS(1)
Note: You need to pay more attention to line start with '*'