Re: [PATCH 2/2] pio cleanup, split kvm_setup_pio() in two functions

[Laurent Vivier <Laurent.Vivier-6ktuUTfB/bM@public.gmane.org>]

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Dong, Eddie wrote:
> kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org wrote:
>> Laurent Vivier wrote:
>>> Dong, Eddie wrote:
>>>> kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org wrote:
>>>>> PATCH 2/2] setup_pio-cleanup, some cleanup, split
>>>>> kvm_setup_pio() in two
>>>>> functions, one to setup in/out pio (kvm_emulate_pio()) and one to
>>>>> setup ins/outs pio (kvm_emulate_pio_string()).
>>>>>
>>>> Did u try on lapic3 branch with XP guest? Only windows guest is
>>>> using string IO.
>>> Yes, I tried XP guest, it works fine, but not on lapic3 branch.
>>>
>>> BTW, I saw string IO with linux too. But Windows XP uses insb/outsb,
>>> unlike linux which uses ins{wd}/outs{wd}.
>>>
>> Only with lapic3 + windows guest, string PIO has a real usage model.
>> I think we have to do that before taking.
>> thanks, eddie
>>
> I may confuse you. Currently master doesn't do in kernel PIO emulation,
> all string PIO
> will go to user level which is fine.  With lapic3, we have kernel PIO
> emulation for PIC.
> Linux doesn;t use string PIO for PIC (port 0x20/0x21) but XP and Win2003
> does.
> So can u test kernel string PIO?

Yes, I should be able, just explain me what and how...

Laurent
-- 
------------- Laurent.Vivier-6ktuUTfB/bM@public.gmane.org  --------------
          "Software is hard" - Donald Knuth


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