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Re: [Xen-users] iommu=pass-through broken?

  • To: <xen-users@xxxxxxxxxxxxx>
  • From: Gordan Bobic <gordan@xxxxxxxxxx>
  • Date: Wed, 11 Sep 2013 10:01:05 +0100
  • Delivery-date: Wed, 11 Sep 2013 09:02:33 +0000
  • List-id: Xen user discussion <xen-users.lists.xen.org>

On Wed, 11 Sep 2013 10:11:34 +0200, Atom2 <ariel.atom2@xxxxxxxxxx> wrote:
Am 11.09.13 01:36, schrieb Gordan Bobic:
I'm trying to use dom0 DMA pass-through (i.e. without IOMMU
translation), and I can't seen to get it to work. According to this:


the required incantation is iommu=pass-through
I think I remember that, for consistency's sake with other
parameters, the option's name was changed to "dom0-passthrough" at
some time.

It might make sense to do a grep on your (uncompressed) xen-kernel
and see whether you can find the string "pass-through" in your binary.
For my kernel (xen-version is 4.2.2) I couldn't find any occurenec of
"pass-through" but rather only "dom0-passthrough" which seems to
confirm my suscpicion.

Thanks for that. Grep confirms your findings. I'll try that.


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