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List:       xen-devel
Subject:    Re: [Xen-devel] Superpages for VT-D
From:       Santosh Jodh <Santosh.Jodh () citrix ! com>
Date:       2012-07-31 20:44:20
Message-ID: 7914B38A4445B34AA16EB9F1352942F1012F0DE66157 () SJCPMAILBOX01 ! citrite ! net
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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@xen.org] 
Sent: Tuesday, July 24, 2012 12:42 PM
To: Santosh Jodh
Cc: Nakajima, Jun; xiantao.zhang@intel.com; xen-devel@lists.xen.org
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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