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Re: [Xen-devel] IOMMU issue on HP DL385g7 servers - workaround_bogus_bio

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] IOMMU issue on HP DL385g7 servers - workaround_bogus_bios / workaround_bug_bios doesn't help
From: Mark Schneider <ms@xxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 14 Jul 2011 15:14:56 +0200
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Mark Schneider <ms@xxxxxxxxxxxxxxxxxxxxxx>
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Thank you for your message Konrad.

 Which link is that for creating a live image with Xen?

Sorry for confusion - currently it is only a link to a file with instruction where to get last images (one for sqeeze and one for wheezy) from and some additional information.
http://www.it-infrastrukturen.com/fileadmin/linux/debian-live-xen/README.xen
# ---

rsync -avP 
rsync://www.it-infrastrukturen.ch/ftp/xen40-squeeze-amd64-live-gnome-binary-hybrid.iso
 .

# ---

As I need HVM with IOMMU support to passthrough some PCI-devices to domU domains, I am looking for a workaround for missing IOMMU-flag support in BIOS of HP DL385g7. Server hardware from other vendors can work correctly. For this reason I have also created a xen live image for wheezy (the available one with kernel 2.6.39-2 amd64 and non booting one with 3.0-rc6 (non available yet for downloads)), however there are some kernel 3.0-rc6 issues with aufs support so the wheezy image doesnt boot as expected with kernel 3.0-rc6)

I use debian live builder to create these live images. If you need some detailed instruction how to create such images with debian live please let me know. It is a bunch of config files, some hook scripts, local packages (like firmware-bnx2 ... you need for HP DL servers) and xen PVM/HVM config examples I copy into the live builder dir structure after running "lb config ... " and before running "lb-build ... "

 Did you try to follow the ParaVirt Wiki for the troubleshooting options? Like
 ratching up the debug options?

I am not sure what wiki (URL) do you mean exactly. I have read a lot of different wiki-pages.
I will check for it.

Regards,
Mark

--
ms@xxxxxxxxxxxxxxxxxxxxxx



Am 14.07.2011 15:34, schrieb Konrad Rzeszutek Wilk:
On Wed, Jul 13, 2011 at 04:05:54PM +0200, Mark Schneider wrote:
Hello,

I have cretaed wheezy xen 4.1 debian live image (s. the link below
to it) but even I tried different boot options like "iommu=1 |
Which link is that for creating a live image with Xen?

workaround_bios_bug | workaround_bogus_bios" I am getting such entry
"(XEN) AMD-Vi: IOMMU not found!" in the log (s. for more details in 
http://www.it-infrastrukturen.com/fileadmin/linux/paste/xm_dmesg.xen41_on_DL385g7_NOK.txt
)

link to xen 4.0 (squeeze) and xen 4.1 (wheezy) debian live images - 
http://www.it-infrastrukturen.com/fileadmin/linux/debian-live-xen/README.xen

do you have any idea how to solve this issue? - thank you in advance
for any hints (different one than killing the hardware vendor (HP)
;) ... for the missing IOMMU BIOS option
Did you try to follow the ParaVirt Wiki for the troubleshooting options? Like
ratching up the debug options?
Linux xen41dom0 2.6.39-2-amd64 #1 SMP Wed Jun 8 11:01:04 UTC 2011
x86_64 GNU/Linux

Thank you in advance for any hints.

Regards, Mark

--
ms@xxxxxxxxxxxxxxxxxxxxxx


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