Re: [Xen-devel] [PATCH XTF 4/4] xtf: Add emul-unimpl test

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 14.12.18 at 14:34, <ppircalabu@xxxxxxxxxxxxxxx> wrote:
> Add a new test to verify if XEN can correctly handle the
> X86EMUL_UNIMPLEMENTED event.
> 
> The XTF DomU test image just executes a instruction not implemented by
> the XEN X86 emulator (fstenv) and checks if the execution was
> successfull. This instruction will be the first one in a custom .text
> section.

May I suggest that you use an insn which is liable to remain
unimplemented? FSTENV, together with {F,FX,X}{SAVE,RSTOR}
are at the top of my (emulator) list of items to work on. If you
pick any instruction which we _can_ reasonably implement,
chances would then be that eventually your test will fail,
preventing an osstest push. This would better be avoided from
the beginning.

Jan



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