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

[Santosh Jodh <Santosh.Jodh@xxxxxxxxxx>]

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? 

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?

Thanks,
Santosh

-----Original Message-----
From: Tim Deegan [mailto:tim@xxxxxxx] 
Sent: Tuesday, July 24, 2012 12:42 PM
To: Santosh Jodh
Cc: Nakajima, Jun; xiantao.zhang@xxxxxxxxx; xen-devel@xxxxxxxxxxxxx
Subject: Re: [Xen-devel] Superpages for VT-D

At 10:56 -0700 on 23 Jul (1343040996), Santosh Jodh wrote:
> Is there an easy way to see the mapping sizes being used for a VM in the 
> IOMMU?

Doesn't look like it.  If the IOMMU is sharing the EPT table you can use the 
'D' debug-key to dump the EPT tables, but I don't think there's an equivalent 
for the IOMMU tables.  I'm sure it wouldn't be too hard to do, though.

Tim.

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