[Bug 99028] [KVM][GVT-d] [BDW & SKL ]Ubuntu 16.04 guest boot up with GPU Hang with drm-intel kernel

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99028

--- Comment #20 from XiongZhang <xiong.y.zhang at intel.com> ---
Created attachment 130728
  --> https://bugs.freedesktop.org/attachment.cgi?id=130728&action=edit
host_dmesg_boot_guest_4.8_kernel

This host message is gotten when I boot a default ubuntu 16.10 kernel based on
v4.8 with stolen memory enabled. From this dmesg, we could see there are
several IOMMU interrupt faults at stolen memory. But there are tons of IOMMU
interrupt faults at 0xff20c000 where I don't know who owns. while I didn't see
gpu hang in this guest during the boot process.  
The access to 0xff20c0000 should be a bug and it has been fixed in
drm-intel-nightly.

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