Re: FreeBSD Dom0 IOMMU issues (resent)

["Chen, Tiejun" <tiejun.chen@intel.com>]

On 2015/5/8 2:58, Michael Dexter wrote:
>
> Hello all,
>

Are you running IGD passthrough with guest OS?

> On 5/6/15 7:47 PM, Chen, Tiejun wrote:
>> #1. Disable interrupt message generation
>> #2. Please add 'cpuidle=0 msi=1'
>
> With another try, get the same with the patched kernel:

What is your CPU? BDW? HSW? And what is your FreeBSD Linux version on 
Dom0 side? I just think you can directly try the latest upstream Linux 
as Dom0, because I see so many messages indicating GPU hang.

error: [drm:pid12:i915_hangcheck_hung] *ERROR* Hangcheck timer 
elapsed... GPU hung
info: [drm] capturing error event; look for more information in sysctl 
hw.dri.0.info.i915_error_state
info: [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off
error: [drm:pid12:i915_hangcheck_hung] *ERROR* Hangcheck timer 
elapsed... GPU hung
info: [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off
(XEN) irq.c:380: Dom1 callback via changed to Direct Vector 0x93
error: [drm:pid12:i915_hangcheck_hung] *ERROR* Hangcheck timer 
elapsed... GPU hung
info: [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off
(XEN) irq.c:270: Dom1 PCI link 0 changed 5 -> 0
(XEN) irq.c:270: Dom1 PCI link 1 changed 10 -> 0
(XEN) irq.c:270: Dom1 PCI link 2 changed 11 -> 0
(XEN) irq.c:270: Dom1 PCI link 3 changed 5 -> 0
error: [drm:pid12:i915_hangcheck_hung] *ERROR* Hangcheck timer 
elapsed... GPU hung
info: [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off
error: [drm:pid12:i915_hangcheck_hung] *ERROR* Hangcheck timer 
elapsed... GPU hung
info: [drm] Enabling RC6 states: RC6 off, RC6p off, RC6pp off
error: [drm:pid12:i915_hangcheck_hung] *ERROR* Hangcheck timer 
elapsed... GPU hung

So maybe you need to upgrade DRM/I915 driver firstly.


>
> (XEN) ****************************************
> (XEN) Panic on CPU 2:
> (XEN) queue invalidate wait descriptor was not executed
> (XEN) ****************************************
>
> I had 'intel_iommu=off' are per a suggestion I found and removed it.

Yes, you should enable intel iommu if you want to use IOMMU.

Thanks
Tiejun

>
> See "intelpatch2.txt" for this output.
>
> "intel-no-xorg.txt" is the successful lifecycle of the same DomU without
> Xorg running for reference.
>
> Michael Dexter