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From: Peter Chubb <peter.chubb@nicta.com.au>
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Subject: Re: [Qemu-devel] [PATCH] imx.31 and KZM board support
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: Peter Chubb <peter.chubb@nicta.com.au>, Peter Chubb <peterc@gelato.unsw.edu.au>, qemu-devel@nongnu.org

>>>>> "Peter" =3D=3D Peter Maydell <peter.maydell@linaro.org> writes:

Peter> On 21 November 2011 23:54, Peter Chubb
Peter> <peterc@gelato.unsw.edu.au> wrote:
>> Do you have a suggestion for an alternative to hw_error for guest
>> bad behaviour? =C2=A0It seems to be used historically. =C2=A0For emulati=
ng
>> ARM, causing qemu to stop isn't such a bad idea ... the guest does
>> something wrong and the qemu instance dies with a message. =C2=A0It's
>> not as it that'll affect any other guests, each of which will have
>> their own qemu instance.

Peter> The question's come up before and we don't currently have a
Peter> good API for it. Personally I prefer "silently ignore" for the
Peter> moment; hardware doesn't chatter at you about guest OS
Peter> misbehaviour...

Speaking as an OS developer I'd much prefer to have the simulator yell
at me when my code tries to write to bad registers.  That's one of the
reasons I try to use the emulator rather than the real hardware --- it
allows one to find bugs otherwise invisible.

--
Dr Peter Chubb  http://www.gelato.unsw.edu.au  peterc AT gelato.unsw.edu.au
http://www.ertos.nicta.com.au           ERTOS within National ICT Australia