Re: xen kernel 2.6.18 bug with a d-link DFE 580TX - pci hide

[Michael Kapp <tquarkk@isis-it.de>]

Keir Fraser wrote:
> On 26/10/08 08:58, "Michael Kapp" <tquarkk@isis-it.de> wrote:
> 
>>> Add swiotlb=force to your domain's kernel command line.
>> I set swiotlb=force in the domU conf, that doesn't fix it - also with
>> noirqdebug.
> 
> That should be impossible since the line you are bugging on will not be
> executed if the swiotlb has been successfully enabled. Do you get a line in
> dmesg stating "Software IO TLB enabled"? If not then is CONFIG_SWIOTLB
> enabled in your kernel config (should happen by default). The file
> lib/swiotlb-xen.c should be getting built and you'll see there is code near
> the top of that file to parse swiotlb=force which sets swiotlb_force and
> should cause swiotlb_init() to do the right thing (which should get called
> via the path mem_init->pci_iommu_alloc->pci_swiotlb_init->swiotlb_init.

yeah - your right! My domU config was wrong, with swiotlb=force it's
working, thanks!

Can you tell me what this parameter is doing in detail, or where i can
find docs about it?

Regards,
Michael