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IOMMU support in BIOS of HP DL385 g7 servers

ironm
Occasional Visitor

IOMMU support in BIOS of HP DL385 g7 servers

Hello,

 

Does HP DL385 g7 BIOS support IOMMU for xen virtualization?

There is no option in BIOS to activate it. Maybe I need a special BIOS version?

 

What I see in xen enabled kernels dmesg is like:

# --

root@xen:/xendomains# grep -i iommu dmesg-DL385g7-kernel*
dmesg-DL385g7-kernel2.6.38-7.txt:[    0.000000] Please enable the IOMMU option in the BIOS setup
dmesg-DL385g7-kernel2.6.38-7.txt:[    2.065763] PCI-DMA: using GART IOMMU.
dmesg-DL385g7-kernel2.6.38-7.txt:[    2.065778] PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture
dmesg-DL385g7-kernel3.txt:[    0.000000] Please enable the IOMMU option in the BIOS setup
dmesg-DL385g7-kernel3.txt:[    6.722631] PCI-DMA: using GART IOMMU.
dmesg-DL385g7-kernel3.txt:[    6.722651] PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture
# ---

 

Thank you in advance for any hints.

 

Regards,

Mark

 

ps. I have planned to order three further DL385 g7 servers depends on this IOMMU feature for HVMs

5 REPLIES
ironm
Occasional Visitor

Re: IOMMU support in BIOS of HP DL385 g7 servers

just dmesg for kernel 3.0

ironm
Occasional Visitor

Re: IOMMU support in BIOS of HP DL385 g7 servers

some more details:

 

when I try to boot "Linux xen 2.6.32-5-xen-amd64" kernel on HP DL385 g7 with iommu=force option I am getting Panic on CPU 0 and the sytem reboots - see message (on the console) below:

# ---

(XEN) HVM: ASIDs enabled
(XEN) HVM: SVM enabled
(XEN) HVM: Hardware Assited Paging detected
(XEN) AMD-Vi: IOMMU not found!
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 0:
(XEN) IOMMU setup failed. crash Xen for security purpose!
(XEN) ****************************************
(XEN)
(XEN) Reboot in five seconds...
# ---

 

The boot entries of my syslinux loader look like:

# ---

label xen40liveHiddenPCI
        menu label xen40liveHiddenPCI
        kernel /live/mboot.c32
        append /live/xen_40_amd64.gz dom0_mem=2048M iommu=force --- /live/vmlinuz console=tty0 ro boot=live config locales=de_DE.UTF-8 utc=no timezone=Europe/Zurich keyboard-layouts=de username=ironm hostname=xen quiet xen-pciback.hide=(05:00.0)(05:00.1) --- /live/initrd.img
# ---

 

 

Sirajul haque
Frequent Advisor

Re: IOMMU support in BIOS of HP DL385 g7 servers

Seems like the option is missing in DL385 G7 and DL585 G7. May be need a BIOS update

Though I work for HP, I do not represent HP here :)
Mc20piece
Occasional Advisor

Re: IOMMU support in BIOS of HP DL385 g7 servers

Has anyone heard anything on this? I have the latest BIOS for the 385 G7 (A18 3/19/2012) and its still not there. This is a huge issue to be honest. If I am missing something please let me know.

Gonzaord
Occasional Visitor

Re: IOMMU support in BIOS of HP DL385 g7 servers

Thi option is only avalaible on some GEN8 Servers with AMd processors.
See http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00191707/c00191707.pdf on page 38.