Re: [Qemu-devel] [PATCH 1/2] debugexit: support for custom exit port (LGPL VGA BIOS port 0x501)

[Jan Kiszka]

On 2012-10-05 14:46, Paolo Bonzini wrote:
> Il 05/10/2012 14:43, Jan Kiszka ha scritto:
>>>>>> This "| 1" might be the problem.  Anthony, are you relying on it in
>>>>>> qemu-test and/or can you work out the changes if we use just
>>>>>> "exit(val)"?
>>>>
>>>> The reason for ' | 1' was to make sure that the guest couldn't trigger
>>>> an exit(0).
>>>>
>>>> If there's a compelling reason to drop '| 1', I can adjust my tests
>>>> accordingly.
>> assert(val); (or hw_error)
>> exit(val);
>>
>> I would suggest.
> 
> I think what the kvm_unittests want is exactly to trigger an exit(0).
> Why did you rule it out?

To avoid spurious exits on port scans etc. that appear like regular
ones. However, as we configure this device explicitly in, not adding it
in some default, that risk is likely low.

Jan

-- 
Siemens AG, Corporate Technology, CT RTC ITP SDP-DE
Corporate Competence Center Embedded Linux