Re: [RFC] [Patch] calgary iommu: Use the first kernel's tce tables in kdump

[Muli Ben-Yehuda <muli@il.ibm.com>]

On Tue, Jul 15, 2008 at 02:15:27PM +0530, Chandru wrote:
> kdump kernel fails to boot with calgary iommu and aacraid driver on a x366 
> box. The ongoing dma's of aacraid from the first kernel continue to exist 
> until the driver is loaded in the kdump kernel. Calgary is initialized prior 
> to aacraid and creation of new tce tables causes wrong dma's to occur. Here 
> we try to get the tce tables of the first kernel in kdump kernel and use 
> them. While in the kdump kernel we do not allocate new tce tables but instead 
> read the base addres register contents of calgary iommu and use the tables 
> that the registers point to. With these changes the kdump kernel and hence 
> aacraid now boots normally.
> 
> Signed-off-by: Chandru Siddalingappa <chandru@in.ibm.com>

Acked-by: Muli Ben-Yehuda <muli@il.ibm.com>

Cheers,
Muli