Magenheimer, Dan (HP Labs Fort Collins) wrote:
Hi Dan,
Revision 5. Incorporates abstraction changes to ia64_getreg
and ia64_setreg as suggested by David Mosberger and Tony
Luck. Also generalized a bit so that it will be easy to
support other virtualization software that may come along.
You mean at compile time? Runtime would be interesting as well, but that
would mean moving the macros out of line.
This patch is currently against 2.6.12 (thus for review only).
Signed-off-by: Dan Magenheimer <[EMAIL PROTECTED]>
The patch looks pretty clean to me (except for the CONFIG_XEN comment I
sent to xen-merge). But the bigger question we haven't answered is:
Is an instruction level approach sufficient to build a high performance
hypervisor?
This question is being actively debated on the x86 side as well. If the
answer turns out to be "no" and if after doing some performance
analysis, we conclude that higher level primitives are needed, then some
of these changes would not be needed (because those privilege sensitive
instructions have been replaced by a higher level primitive).
-Arun
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