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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][BAT][iommu]igt@gem_exec_suspend@basic-s4-devices - fail - DMAR write fault 7 + Failed assertion: !"GPU hung""
href="https://bugs.freedesktop.org/show_bug.cgi?id=111699#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][BAT][iommu]igt@gem_exec_suspend@basic-s4-devices - fail - DMAR write fault 7 + Failed assertion: !"GPU hung""
href="https://bugs.freedesktop.org/show_bug.cgi?id=111699">bug 111699</a>
from <span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
</span></b>
<pre>
(In reply to Chris Wilson from <a href="show_bug.cgi?id=111699#c2">comment #2</a>)
<span class="quote">> Correlates with
>
> <3> [90.027305] DMAR: DRHD: handling fault status reg 2
> <3> [90.027363] DMAR: [DMA Write] Request device [00:02.0] fault addr 43000
> [fault reason 07] Next page table ptr is invalid
>
> In the GPU hang, it dies on MI_BATCH_BUFFER_END and doesn't return execution
> to the ring. I presume that's when the lookup failed.
>
> DMA_FADDR: 0x00000000_00013870
>
> didn't cross a page so what it was looking up that failed is a mystery.
>
> "fault addr 43000" looks to be a reference to BBADDR: 0x00000000_00042fd4
> But write? gem_exec_suspend does use a scratch page to verify HW works
> across suspend (using MI_STORE_DWORD_IMM), so probably that's the page that
> is absent.</span >
(In reply to CI Bug Log from <a href="show_bug.cgi?id=111699#c4">comment #4</a>)
<span class="quote">> A CI Bug Log filter associated to this bug has been updated:
>
> {- ICL: igt@gem_exec_suspend@basic-s4-devices - fail - Failed assertion:
> !"GPU hung" -}
> {+ ICL: igt@gem_exec_suspend@basic-s4-devices - fail - Failed assertion:
> !"GPU hung" +}
>
> New failures caught by the filter:
>
> *
> <a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6903/shard-iclb6/">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6903/shard-iclb6/</a>
> igt@<a href="mailto:gem_exec_suspend@basic.html">gem_exec_suspend@basic.html</a></span >
One more instance, but on shards.
<3> [209.832569] DMAR: DRHD: handling fault status reg 2
<3> [209.832629] DMAR: [DMA Write] Request device [00:02.0] fault addr 41000
[fault reason 07] Next page table ptr is invalid
DMA_FADDR: 0x00000000_007f8b78</pre>
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