The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/kernel/+/0d4df0a701be520f0ab367221e28a253f5c2e439

commit 0d4df0a701be520f0ab367221e28a253f5c2e439
Author: Nicolas Norvez <norvez@chromium.org>
Date: Tue Sep 13 11:00:45 2016

CHROMIUM: config: enable virtio_gpu for x86_64

Enable CONFIG_DRM_VIRTIO_GPU for x86_64 to run higher screen resolutions
in qemu compared to cirrus

BUG= chromium:636309 
TEST=build amd64-generic, run in qemu with '-vga virtio'
TEST=trybot amd64-generic-chromium-pfq, VMTests passed using '-vga
cirrus'

Change-Id: Ic9ec038b44f75ce91d62c5048991158970428f5c
Reviewed-on: https://chromium-review.googlesource.com/384871
Commit-Ready: Nicolas Norvez <norvez@chromium.org>
Tested-by: Nicolas Norvez <norvez@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>

[modify] https://crrev.com/0d4df0a701be520f0ab367221e28a253f5c2e439/chromeos/config/x86_64/chromeos-intel-pineview.flavour.config
[modify] https://crrev.com/0d4df0a701be520f0ab367221e28a253f5c2e439/chromeos/config/x86_64/chromiumos-x86_64.flavour.config
[modify] https://crrev.com/0d4df0a701be520f0ab367221e28a253f5c2e439/chromeos/config/x86_64/common.config

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/kernel/+/2e291fdcc1bf49ceca3b0f15279c048ac3c477ea

commit 2e291fdcc1bf49ceca3b0f15279c048ac3c477ea
Author: Nicolas Norvez <norvez@chromium.org>
Date: Wed Aug 31 17:24:20 2016

CHROMIUM: vgem: Fix locking around drm_vma_offset_exact_lookup_locked()

Same as https://patchwork.kernel.org/patch/7404291/ ("drm/gem: Use
kref_get_unless_zero for the weak mmap references") for VGEM.
Calling drm_vma_offset_exact_lookup_locked() now requires the vma
offset manager lookup lock be acquired with
drm_vma_offset_lock_lookup() instead of holding struct_mutex.

BUG= chromium:636309 
TEST=Ran amd64-generic with ARC++ enabled in qemu, lockup disappeared

Change-Id: Icca821e665731fd41d0a8767d574ac573bbbb2c6
Signed-off-by: Nicolas Norvez <norvez@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/378857
Reviewed-by: Tomasz Figa <tfiga@chromium.org>

[modify] https://crrev.com/2e291fdcc1bf49ceca3b0f15279c048ac3c477ea/drivers/gpu/drm/vgem/vgem_drv.c

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform/crosutils/+/c55ab68898511ab62aae3d36a86d0d7edce40939

commit c55ab68898511ab62aae3d36a86d0d7edce40939
Author: Nicolas Norvez <norvez@chromium.org>
Date: Fri Sep 23 15:17:14 2016

cros_vm: use the SDK's version of qemu

By default, use the version of qemu shipped with the SDK rather than the
default one shipped with the system that may not support all required features
(e.g. support for virtio_gpu).
This also gives us a more consistent behaviour when VMs are deployed on
different hosts with different versions of qemu.
Requires CL:351861 so qemu can be used from outside the chroot.

BUG= chromium:618431 
BUG= chromium:636309 
TEST=cbuildbot --remote cyan-android-pfq after applying CL:389132 to
enable VM tests.
TEST=cros_run_vm_update --qemu_binary='xxxx' and check that the correct
qemu binary gets picked.
CQ-DEPEND=CL:351861

Change-Id: Ibd7e120229b0a64b3d38a7cb779d5efbdd8914bd
Reviewed-on: https://chromium-review.googlesource.com/389152
Commit-Ready: Nicolas Norvez <norvez@chromium.org>
Tested-by: Nicolas Norvez <norvez@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>

[modify] https://crrev.com/c55ab68898511ab62aae3d36a86d0d7edce40939/lib/cros_vm_lib.sh

Arbitrary screen resolutions are now supported, need to use qemu 2.6 (shipped with Chrome OS SDK) with '-vga virtio' option.