Re: [RFC PATCH 0/3] generic hypercall support

From: Avi Kivity
Date: Thu May 07 2009 - 14:06:50 EST


Gregory Haskins wrote:
I completed the resurrection of the test and wrote up a little wiki on
the subject, which you can find here:

http://developer.novell.com/wiki/index.php/WhyHypercalls

Hopefully this answers Chris' "show me the numbers" and Anthony's "Why
reinvent the wheel?" questions.

I will include this information when I publish the updated v2 series
with the s/hypercall/dynhc changes.

Let me know if you have any questions.

Well, 420 ns is not to be sneezed at.

What do you think of my mmio hypercall? That will speed up all mmio to be as fast as a hypercall, and then we can use ordinary mmio/pio writes to trigger things.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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