Ingo Molnar wrote:
kvm has three requirements not needed by kprobes:
- it wants to execute instructions, not just decode them, including
generating faults where appropriate
- it is performance critical
- it needs to support 16-bit, 32-bit, and 64-bit instructions simultaneously
If an arch/x86/ decoder/emulator gives me these I'll gladly switch
to it. x86_emulate.c is high on my list of most disliked code.
Well, this has to be driven from the KVM side as the kprobes use
will only be for decoding so if it's modified from the kprobes side
the KVM-only functionality might regress.
So ... we can do the library decoder for kprobes purposes, and
someone versed in the KVM emulator can then combine the two.
Problem is, anyone versed in the kvm emulator will want to run as far
away from this work as possible.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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