Re: [Xen-devel] Re: [RFC PATCH linux-2.6.18-xen] pciback: clean up (MSI-X vec, entrynr) list when resetting PCI device

[Laszlo Ersek <lersek@xxxxxxxxxx>]

On 06/01/11 16:31, Konrad Rzeszutek Wilk wrote:
> On Wed, Jun 01, 2011 at 01:02:02PM +0200, Laszlo Ersek wrote:
> > (Perhaps it's best to write a separate mail about this.)
> Yes. You did use 'iommu=soft' on your bootup line right?
I thought I did; turns out I was wrong. Sorry for the noise.

Now I tried with "iommu=soft swiotlb=force", but this way the guest 
immediately disappears; it doesn't even start to produce console output.
# xm create -c f15-64bit-pv
Using config file "/etc/xen/f15-64bit-pv".
Using <class 'grub.GrubConf.GrubConfigFile'> to parse /grub/menu.lst
Started domain f15-64bit-pv
#

http://wiki.xen.org/xenwiki/XenPCIpassthrough says though:

    Bugs:

    # Starting the DomU using pvgrub with 'iommu=soft swiotlb=force'
    breaks pvgrub.

Perhaps that could be the reason. Removing "swiotlb=force" and keeping 
only "iommu=soft" crashes (?) the same way.
Thanks,
lacos

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