Re: [Qemu-devel] [PATCH 4/4] Disable "info irq" and "info pic" for target-ppc

["Andreas Färber" <afaerber@suse.de>]

Am 29.06.2015 um 12:36 schrieb Andreas Färber:
> Am 29.06.2015 um 12:22 schrieb Laurent Vivier:
>> On 29/06/2015 12:06, Andreas Färber wrote:
>>> Am 29.06.2015 um 11:55 schrieb Laurent Vivier:
>>>> On 29/06/2015 11:51, Laurent Vivier wrote:
>>>>> On 29/06/2015 11:30, Thomas Huth wrote:
>>>>>> On Mon, 29 Jun 2015 09:52:56 +0200
>>>>>> Laurent Vivier <lvivier@redhat.com> wrote:
>>>>>>> On 29/06/2015 07:36, David Gibson wrote:
>>>>>>>> diff --git a/monitor.c b/monitor.c
>>>>>>>> index aeea2b5..8c56bfa 100644
>>>>>>>> --- a/monitor.c
>>>>>>>> +++ b/monitor.c
>>>>>>>> @@ -2573,7 +2573,7 @@ static mon_cmd_t info_cmds[] = {
>>>>>>>>          .help       = "show the command line history",
>>>>>>>>          .mhandler.cmd = hmp_info_history,
>>>>>>>>      },
>>>>>>>> -#if defined(TARGET_I386) || defined(TARGET_PPC) || defined(TARGET_MIPS) || \
>>>>>>>> +#if defined(TARGET_I386) || defined(TARGET_MIPS) || \
>>>>>>>>      defined(TARGET_LM32) || (defined(TARGET_SPARC) && !defined(TARGET_SPARC64))
>>>>>>>>      {
>>>>>>>>          .name       = "irq",
>>>>>>>>
>>>>>>>
>>>>>>> Perhaps we can a use a "#if defined(CONFIG_I8259) ||
>>>>>>> defined(CONFIG_LM32) || (defined(TARGE_SPARC) &&
>>>>>>> !defined(TARGET_SPARC64))" instead, so we keep the command for PReP ?
>>>>>>
>>>>>> AFAIK this currently won't work since CONFIG_I8259 is only defined for
>>>>>> the Makefiles, but not for the C pre-processor :-(
>>>>>
>>>>> Yes, I see that afterward, but ...
>>>>>
>>>>>> So unless somebody fixes that first, I think David's approach is the
>>>>>> only practicable solution right now.
>>>>>
>>>>> if you add "config-devices.h" in GENERATED_HEADERS in Makefile.target,
>>>>> and include "config-devices.h" in monitor.c, it works (all PREP
>>>>> dependencies in default-configs/ppc64-softmmu.mak must be removed too)
>>>>>
>>>>> But does this change acceptable for a tiny improvement ?
>>>>
>>>> In fine, I think we can also do like for sparc:
>>>>
>>>> defined(TARGET_PPC) && !defined(TARGET_PPC64)
>>>
>>> Alex specifically requested PReP to be made available in ppc64, too.
>>
>> Thank you Andreas.
>>
>> But why ? (I didn't find the answer with google, a link can be helpful).

http://git.qemu-project.org/?p=qemu.git;a=commit;h=acbb090b2400f627a801074c4e3e006c7501bb26

(found by looking at the ppc64-softmmu.mak Git history)

Judging by Markus as the reporter, I assume it was a tree-wide analysis
that came up with this inconsistency, which I was then asked to fix this
way.

Andreas

>>
>> Is there any 64bit PReP ?
>>
>> BTW using CONFIG_I8259 cannot enable it only for PReP and not for other
>> PPC64. So the solution from David is the best.
> 
> For all newer targets (excluding sparc64 etc.) the 64-bit target is
> expected to deliver all 32-bit targets as well, for use with KVM in that
> bitness or for convenience of installing just one executable.
> 
> Alex is on CC and if you ping him hard enough he might reply himself. ;)
> 
> So, generating a header file, like you proposed above, seems like the
> most elegant solution to me here.
> That won't help the qtest issue I raised on the other patch though,
> which would need a QMP lookup as discussed in the ivshmem context. I
> rebased that patch on Friday and can look into factoring that out into
> libqtest.[ch].
> 
> Regards,
> Andreas
> 


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