From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH v4 3/3] xen/iommu: arm: Use p2m_ipa_bits as
 stage2 input size
Date: Tue, 5 May 2015 14:59:02 +0100
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To: Julien Grall <julien.grall@citrix.com>
Cc: edgar.iglesias@xilinx.com, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, tim@xen.org, stefano.stabellini@citrix.com, xen-devel@lists.xen.org
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On Tue, 2015-05-05 at 14:48 +0100, Julien Grall wrote:
> > Do we need to also check that we are configuring the same number of
> > levels of PT etc, or is that already handled?
> 
> The SMMU only care about the number of IPA bits.

What ensures that the starting level of the SMMU matches the starting
level of the MMU-s2?

Feeding a 3-level table to an MMU which is configured to expect 4 won't
end well.

Ian.