On 12/13/2010 12:35 AM, Avi Kivity wrote:
On 12/13/2010 06:45 AM, Yoder Stuart-B08248 wrote:
Avi/Hollis,
Exchanged some emails with Alex on the topic of rewriting on
powerpc KVM-- the current approach taken by Alex's PV patch is
to have a guest Linux paravirt itself, by re-writing certain
instructions.
The downside to this approach (guest side patching) is that every OS
to be run on KVM has to be modified or dynamically patched.
What were the reasons for not going down the path of doing the
re-writing in the hypervisor? (Alex couldn't remember the
specifics). What about doing it from Qemu?
Rewriting is dangerous if the guest is unaware of it. As soon as it
is made aware of it, it might as well actually do it in the best way
that suits it.
Can you list some examples of dangerous scenarios?
Hollis Blanchard
Mentor Graphics, Embedded Systems Division
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