On 03/09/2010 08:09 PM, Gleb Natapov wrote:
We don't want to enter the emulator for non-string in/out. Leftover
test code?
No, unfortunately this is not leftover. I just don't see a way how we
can bypass emulator and still have emulator be able to emulate in/out
(for big real mode for instance). The problem is basically described in
the commit message. If we have function outside of emulator that does
in/out emulation on vcpu directly, then emulator can't use it since
committing shadowed registers will overwrite the result of emulation.
Having two different emulations (one outside of emulator and another in
emulator) is also problematic since when userspace returns after IO exit
we don't know which emulation to continue. If we want to avoid
instruction decoding we can fill in emulation context from exit info as
if instruction was already decoded and call emulator.
Alternatively, another entry point would be fine. in/out is a fast path
(used for virtio for example).
--
error compiling committee.c: too many arguments to function
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