Re: [Xen-devel] pv-grub boot hangs when iommu=soft. Booting kernel directly with the flags works

[Bruce Edge <bruce.edge@xxxxxxxxx>]

On Wed, Apr 7, 2010 at 9:57 AM, Samuel Thibault <samuel.thibault@xxxxxxxxxxxx> wrote:

listmail, le Wed 07 Apr 2010 12:53:19 -0400, a écrit :

> "If the 'iommu=soft swiotlb=force' is removed it boots"
>
> but in actuality,  "switotlb=force" can be left in and it boots ok as well.
> From what I've see it is only when having "iommu=soft" added in that
> exposes the issue.

Ok, so the problem really is the combination of pv-grub and iommu=soft.

Any update on this problem?

I'm assuming that this is related to my inability to pass through PCI devices to a domU when using pv-grub as such requires the use of iommu=soft.

-Bruce

 

> I understand that you have communicated that you don't have time for
> this in near future and I respect that, however, if there is something
> specific to try that would shed more light on the issue then let me
> know.

I have no idea off-hand.  In "I don't have time in the near future", I
mean that other people could perhaps have a closer look at the issue...

Samuel

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