Re: [Xen-devel] Superpages for VT-D

[Santosh Jodh <Santosh.Jodh@xxxxxxxxxx>]

Thanks for confirming. BTW, would the IOMMU ever have entries above domains max 
mapped pfn?

-----Original Message-----
From: Tim Deegan [mailto:tim@xxxxxxx] 
Sent: Thursday, August 02, 2012 4:11 AM
To: Santosh Jodh
Cc: xiantao.zhang@xxxxxxxxx; Nakajima, Jun; xen-devel@xxxxxxxxxxxxx
Subject: Re: [Xen-devel] Superpages for VT-D

At 13:44 -0700 on 31 Jul (1343742260), Santosh Jodh wrote:
> I am going to try to add this support. 
> 
> It looks like a new iommu_ops handler would be needed that would do 
> the actual work of dumping the entries - one for AMD and one for 
> Intel. Am I reading this correctly?

I think that's correct.

> Or is it better to get the root_table + paging_mode (for AMD) and 
> pgd_maddr + agaw (for Intel) and then do a generic dump?

No; the iommu tabels are sufficiebntly arch-specific that it's best to add 
arch-specific dump routines.

Cheers,

Tim.

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