Thread (39 messages) 39 messages, 12 authors, 2007-08-24

Re: [PATCH] Add I/O hypercalls for i386 paravirt

From: Andi Kleen <hidden>
Date: 2007-08-23 01:40:30
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On Wed, Aug 22, 2007 at 05:38:31PM -0700, Jeremy Fitzhardinge wrote:
Andi Kleen wrote:
quoted
On Wed, Aug 22, 2007 at 04:14:41PM -0700, Jeremy Fitzhardinge wrote:
  
quoted
(which would also have VT, since
all new processors do).
    
Not true unfortunately. The Intel low end parts like Celerons (which 
are actually shipped in very large numbers) don't. Also Intel
is still shipping some CPUs that don't support it at all, like
the ULV Centrinos which are based on an older core.
  
Likely to be missing VT-d too, right?
VT-d is chipset functionality. So it depends on the chipset.

At least initially the non Intel chipsets and lowend chips are unlikely
to get IOMMUs I guess.

There might be some exceptions. e.g. the GPU vendors seem
to want to to their own IOMMUs, so perhaps graphic devices
might have them anyways.

-Andi
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