[Question] How To Log QEMU Memory Access

Peter Maydell peter.maydell at linaro.org
Thu Mar 15 13:29:16 UTC 2012


2012/3/15 周春华 <uulinux at gmail.com>:
> Peter Maydell wrote:
>> Note that there are other slow paths for memory access which don't
>> use the TLB and instead do go via physical addresses at the time
>> they need to do the load/store.
>
> I want to know how to use these slow paths. Will they will "guest virtual ->
> guest physical -> host virtual" again and again when we execute load or
> store instructions.

No, you don't get to choose whether slow or fast paths are used.
QEMU uses the fast paths where it can, and occasionally also
the slow paths in odd corner cases or less often used operations.

-- PMM



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