Asus P8B75-B and Intel I3-3220T IOMMU

Asus P8B75-B and Intel I3-3220T IOMMU

[Matthias Fechner]

Dear list,

I started with kvm. It is based on a gentoo system with kernel 3.7.10
and qemu 1.2.2-r3 from the gentoo portage.
I tried to assign a PCIe card to a guest system.

I followed the manual on
http://www.linux-kvm.org/page/How_to_assign_devices_with_VT-d_in_KVM

And after I rebooted the system it says:
dmesg | grep -e DMAR -e IOMMU
[    0.000000] Intel-IOMMU: enabled
[    0.000000] Intel-IOMMU: disable GFX device mapping

But I cannot see similar lines like on the page.
Could it be, that my mainboard and/or CPU does not support IOMMU?
Could it help to replace the CPU?

The current system is a ivy bridge system.

Thanks
Matthias

-- 

"Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs, and the universe trying to
produce bigger and better idiots. So far, the universe is winning." --
Rich Cook

Re: Asus P8B75-B and Intel I3-3220T IOMMU

[Alex Williamson]

On Sun, 2013-03-17 at 11:40 +0100, Matthias Fechner wrote:
> Dear list,
> 
> I started with kvm. It is based on a gentoo system with kernel 3.7.10
> and qemu 1.2.2-r3 from the gentoo portage.
> I tried to assign a PCIe card to a guest system.
> 
> I followed the manual on
> http://www.linux-kvm.org/page/How_to_assign_devices_with_VT-d_in_KVM
> 
> And after I rebooted the system it says:
> dmesg | grep -e DMAR -e IOMMU
> [    0.000000] Intel-IOMMU: enabled
> [    0.000000] Intel-IOMMU: disable GFX device mapping
> 
> But I cannot see similar lines like on the page.
> Could it be, that my mainboard and/or CPU does not support IOMMU?
> Could it help to replace the CPU?

According to ark the CPU does not support VT-d:

http://ark.intel.com/products/65694/Intel-Core-i3-3220T-Processor-3M-Cache-2_80-GHz

I'm not aware of any i3 CPUs with VT-d.  Thanks,

Alex

Re: Asus P8B75-B and Intel I3-3220T IOMMU

[Matthias Fechner]

Hi Alex,

Am 17.03.2013 14:32, schrieb Alex Williamson:
> According to ark the CPU does not support VT-d:
> 
> http://ark.intel.com/products/65694/Intel-Core-i3-3220T-Processor-3M-Cache-2_80-GHz

thanks for the link. Could to have reference you can search.

If I replace the CPU by a Intel Core i5-3550 do you think the IOMMU will
work then with the mainboard?

Thanks
Matthias

-- 

"Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs, and the universe trying to
produce bigger and better idiots. So far, the universe is winning." --
Rich Cook

Re: Asus P8B75-B and Intel I3-3220T IOMMU

[Matthias Fechner]

Hi,

Am 17.03.2013 15:17, schrieb Matthias Fechner:
> If I replace the CPU by a Intel Core i5-3550 do you think the IOMMU will
> work then with the mainboard?

for the archive, I replaced the i3 now by an i5-3550 and IOMMU works
perfectly.
Thanks again.

Matthias