Re: [PATCH 1/9] pci-assign: Optionally enable 64bit BARs in guest

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On 2012-01-31 14:10, Avi Kivity wrote:
> On 01/31/2012 02:57 PM, Jan Kiszka wrote:
>>>>> Seems fine, but do we really need the option?  If it doesn't work we
>>>>> should treat it as an ordinary but and fix it.
>>>>
>>>> So far it's against the architecture of the emulated system: our current
>>>> chipset predates 64 bit PCI.
>>>>
>>>
>>> Then it should be enabled/disabled at the chipset level.
>>
>> Makes me wonder if we already do some filtering if the device supports
>> 64 bit but the next bridge does not.
>>
> 
> Our 440fx does support 64-bit bars, so the question doesn't arise for
> x86.  Instead we violate the spec.

If you mean by "our" the 440fx-qemu, not the real 440fx. That one does
not even support >1GB RAM.

Jan

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Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
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