From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Gonzalez Monroy, Sergio" <sergio.gonzalez.monroy@intel.com>
Subject: Re: iommu Error on DL380 G8 with RHEL 7.1
Date: Fri, 24 Jul 2015 10:17:00 +0100
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To: "Rapelly, Varun" <vrapelly@sonusnet.com>
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On 24/07/2015 09:54, Rapelly, Varun wrote:
> Hi All,
>
> I'm not able to send packets through OVS bridge [with dpdk] when iommu is enabled on HP DL380 G8 [RHEL 7.1]. Getting following errors in dmesg.
>
> [    0.657681] IOMMU: Setting identity map for device 0000:01:00.2 [0xbdff6000 - 0xbdffcfff]
> [    0.657686] IOMMU: Prepare 0-16MiB unity mapping for LPC
> [ 4458.091522] dmar: DMAR:[DMA Read] Request device [0a:00.0] fault addr 1a633d000
> DMAR:[fault reason 06] PTE Read access is not set
> [ 4458.164541] dmar: DMAR:[DMA Read] Request device [0a:00.0] fault addr 1a633d000
> DMAR:[fault reason 06] PTE Read access is not set
> [ 4458.337565] dmar: DMAR:[DMA Read] Request device [0a:00.1] fault addr 1a63cd000
> DMAR:[fault reason 06] PTE Read access is not set
> [ 4458.637356] dmar: DMAR:[DMA Read] Request device [0a:00.0] fault addr 1a637d000
> DMAR:[fault reason 06] PTE Read access is not set
>
> Where as in another machine ProLiant DL380 G7 [RHEL 7.1] everything works fine. Is it something do with the hardware on Gen8 machine?
>
> The following link shows the similar problem.
>
> http://comments.gmane.org/gmane.comp.networking.dpdk.devel/2281
>
> In the below HP link, they quoted the same problem. I upgraded ROM to the latest version, but no luck. :(
>
> http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c03323800
>
>
>
> We need this flag to be enabled [SR-IOV] on that machine.
>
>
>
> Please let me know, is there any way to resolve this issue?
>
> Regards,
> Varun
>
Hi Varun,

As I replied in you previous post, the issue is most likely related to HP.
You need to contact HP for a solution to your issues as suggested in the 
following thread by Lee A. Roberts from HP:
http://dpdk.org/ml/archives/dev/2015-March/015504.html

Sergio