This bug was fixed in the package linux - 2.6.38-5.32
---
linux (2.6.38-5.32) natty; urgency=low
[ Andy Whitcroft ]
* rebase to mainline 6f576d57f1fa0d6026b495d8746d56d949989161
* [Config] updateconfigs following rebase to v2.6.38-rc6
* [Config] enable CONFIG_DMAR
- LP:
** Changed in: linux (Ubuntu)
Status: Incomplete = Fix Committed
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Title:
CONFIG_DMAR is not set
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Hi Andy,
I tried your kernel - system boots fine and seems to work. Unfortunately
it looks like my board doesn't support the pass-through, so I am unable
to test if it actually works.
From what I've seen from upstream / fedora - it looks like with kvm its
fairly important and I would really like
Anyone able to test these kernels?
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Title:
CONFIG_DMAR is not set
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Can someone who has a working setup confirm that the test kernels as
posted in comment #8 and report if they work?
** Changed in: linux (Ubuntu)
Status: Confirmed = Incomplete
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** Changed in: linux (Ubuntu)
Assignee: (unassigned) = Andy Whitcroft (apw)
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Title:
CONFIG_DMAR is not set
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Ok this option is experimental, but it does sound key to kvm host mode.
I have tried to enable it but with the option to disable it by default
also enabled to reduce the regression risk, so to actually get this
functionality you need to supply a kernel parameter. I have built some
test kernels
This should get fixed as it does somewhat limit the utility of Ubuntu as
a KVM hostI've had to compile a customized kernel to get PCI
passthrough working.
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** Changed in: linux (Ubuntu)
Importance: Undecided = Medium
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CONFIG_DMAR is not set
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Beyond DMAR there are other changes that I found were required to make
Vt-d virtualisation work. I have reported these in Bug #639712
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CONFIG_DMAR is not set
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** Description changed:
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CONFIG_DMAR is not set
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Hi sles,
Please be sure to confirm this issue exists with the latest development release
of Ubuntu. ISO CD images are available from
http://cdimage.ubuntu.com/releases/ . If the issue remains, please run the
following command from a Terminal (Applications-Accessories-Terminal). It
will
Yes, I just checked that CONFIG_DMAR is still turned off in the config
used for 2.6.32-21. Testing the upstream build is kind of meaningless
-- this is not really a kernel bug per se, but rather a problem with the
configuration chosen as part of the Ubuntu packaging.
I understand that the
trivial to confirm; on an up-to-date system:
$ grep CONFIG_DMAR /boot/config-2.6.32-21-generic
# CONFIG_DMAR is not set
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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CONFIG_DMAR is not set
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** Package changed: kvm (Ubuntu) = linux (Ubuntu)
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** Package changed: kvm (Ubuntu) = linux (Ubuntu)
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CONFIG_DMAR is not set
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** Package changed: ubuntu = kvm (Ubuntu)
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** Package changed: ubuntu = kvm (Ubuntu)
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Just noticed this too. Maybe it's too late for 10.04 (which would be
rather ugly) but I think CONFIG_DMAR is pretty safe as long as
CONFIG_DMAR_DEFAULT_ON is not enabled.
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IMHO, this should be not too late, if it is not possible to add this to
generic, it is a must to create another image
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