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Re: [Xen-devel] AMD_IOV: IO_PAGE_FALT trying to pass through Mellanox Co

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] AMD_IOV: IO_PAGE_FALT trying to pass through Mellanox ConnectX HCA (debian testing)
From: Ward Vandewege <ward@xxxxxxx>
Date: Mon, 31 Jan 2011 14:51:54 -0500
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Hi Konrad,

On Mon, Jan 31, 2011 at 01:45:03PM -0500, Konrad Rzeszutek Wilk wrote:
> > Hmm, I do have it:
> Indeed you do. Good!
> > 
> >   # xm dmesg |grep iommu
> >   (XEN) Command line: placeholder iommu=pv,verbose,amd_iommu_debug
> > 
> > But maybe it's not being picked up?
> You should see something passthrough in the log.. thought that might
> be only if you are using Intel VT-d? Not sure.

This seems related:

(XEN) HVM: ASIDs enabled.
(XEN) HVM: SVM enabled
(XEN) HVM: Hardware Assisted Paging detected.
(XEN) AMD-Vi: IOMMU 0 Enabled.
(XEN) I/O virtualisation enabled
(XEN)  - Dom0 mode: Relaxed
(XEN) Total of 16 processors activated.
(XEN)  -> Using new ACK method

I've attached the full xm dmesg output.

> > > you might need to make sure your driver is using the VM_IO flag.
> > > 
> > > There was some discussion on LKML about this and they proposed
> > > a patch that wasn't neccessary. Don't remember the details but I can
> > > look that up next week.
> Found it.. it was from Vivien but in another thread:
> http://www.mail-archive.com/linux-rdma@xxxxxxxxxxxxxxx/msg06980.html

Ah. Is your 


still the one I should test with to see if it fixes this problem? I see
you've got newer versions (up to v4.7) now too. 

Or has this patch meanwhile been pushed into the kernel?


Attachment: xm.dmesg2
Description: Text document

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