From: bugzilla-daemon@bugzilla.kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 76331] kernel BUG at drivers/iommu/intel-iommu.c:844!
Date: Wed, 28 May 2014 10:41:50 +0000 [thread overview]
Message-ID: <bug-76331-28872-j5BykTi2V6@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-76331-28872@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=76331
--- Comment #5 from Matt <mspeder@users.sourceforge.net> ---
Hi Alex,
Great news !
Yesterday I had the opportunity to recompile my kernel with your suggested fix
in intel-iommu driver : dmar_domain->gaw = min(dmar_domain->gaw, addr_width);
After multiple tests I can confirm that this successfully fixed the issue.
How can we have this integrated in the official kernel sources ?
I also tried to re-order the qemu command-line...
With or without the fix I don't see any difference and I always end up with
various problems related to the gpu pass-thru :
- one VM blue screen at boot (VIDEO_TDR_ERROR)
- one Host crash !
- driver error (code 43) and dmesg full of errors like :
[ 2283.900194] dmar: DMAR:[DMA Read] Request device [06:00.0] fault addr
12de0a000
DMAR:[fault reason 12] non-zero reserved fields in PTE
[ 2283.900201] dmar: DMAR:[DMA Write] Request device [06:00.0] fault addr
aff93000
DMAR:[fault reason 12] non-zero reserved fields in PTE
[ 2286.149141] dmar: DRHD: handling fault status reg 602
But I'm not sure if this problem is related...
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next prev parent reply other threads:[~2014-05-28 10:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-16 8:09 [Bug 76331] New: kernel BUG at drivers/iommu/intel-iommu.c:844! bugzilla-daemon
2014-05-16 19:07 ` [Bug 76331] " bugzilla-daemon
2014-05-16 20:28 ` bugzilla-daemon
2014-05-23 5:54 ` bugzilla-daemon
2014-05-23 18:35 ` bugzilla-daemon
2014-05-28 10:41 ` bugzilla-daemon [this message]
2014-07-09 10:25 ` bugzilla-daemon
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