Xen devel - Sep 2008 - [PATCH] [VTD] Add a command line param to enable/disable pass-through feature

Taking security into accout, it''s not suitable to bypass VT-d
translation for Dom0 by default when the pass-through field in extended
capability register is set. This feature is for people/usages who are
not overly worried about security/isolation, but want better
performance.

This patch adds a command line param that controls if it''s enabled or
disabled. 

Signed-off-by: Weidong Han <weidong.han@intel.com>


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A couple of comments:
-  Isn''t there an "official" or standards-defined name for
this
capability?  If so, would it be a better choice for the command line
option?
-  The comment in iommu.c should be more verbose (and this and the other
options should be added to docs/vtd.txt) and say something to the effect
of "...for Dom0 for devices that have the <real name per above>
capability."

Otherwise, ACKed-by:  Joseph Cihula  <joseph.cihula@intel.com>

Joe

-----Original Message-----
From: Han, Weidong 
Sent: Wednesday, September 10, 2008 2:07 AM
To: ''Xen-devel@lists.xensource.com''
Cc: Kay, Allen M; Cihula, Joseph
Subject: [Xen-devel] [PATCH] [VTD] Add a command line param to
enable/disable pass-through feature

Taking security into accout, it''s not suitable to bypass VT-d
translation for Dom0 by default when the pass-through field in extended
capability register is set. This feature is for people/usages who are
not overly worried about security/isolation, but want better
performance.

This patch adds a command line param that controls if it''s enabled or
disabled. 

Signed-off-by: Weidong Han <weidong.han@intel.com>

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Xen-devel@lists.xensource.com
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