[Intel-gfx] Can Intel BDW GPU work perfectly with iommu enabled?

[Dong, Chuanxiao]

Hello,

Found that there is a BDW GPU hang bug with iommu enabled in free desktop Bugzilla since two years ago, and it is still not closed: https://bugs.freedesktop.org/show_bug.cgi?id=89360

The last duplicated issue is 99964 which was reproduced with linux-4.10. Does anyone know if linux-4.11 and the later versions have this issue fixed or not?

Thanks
Chuanxiao