Re: [Qemu-devel] Re: Re: [PATCH v2 6/6] Pass cpu speed into SM BIOS.

[Gleb Natapov <gleb@qumranet.com>]

On Thu, Aug 28, 2008 at 01:42:59AM +0200, Sebastian Herbszt wrote:
> Gleb Natapov wrote:
>>>>> This is the incorrect frequency for a QEMU guest.  I'm not sure 
>>>>> why this  is included.  What does passing the frequency give us?
>>>>>
>>>> This is included for two reasons. First one is to demonstrate that
>>>> proposed interface is extensible. Second is that Micrisoft SVVP 
>>>> test  requires this info (and much more) to be set in SMBIOS 
>>>> tables.
>>>
>>> Can you elaborate a bit on the "and much more" part? Is this the stuff
>>> described in "SMBIOS "Designed for Windows" Logo Requirements" at
>>> http://www.microsoft.com/whdc/system/platform/firmware/SMBIOS.mspx ?
>>>
>> I think yes. There is Microsoft test suit that test SMBIOS
>> implementation. Running it on bochs bios results in a couple of errors.
>
> Could you maybe post those errors on the bochs mailing list?
>
I'll have to rerun test. All I have now is fixes :)

>> Some fields cannot be empty. Some bits should be set. Most things can be
>> fixed without qemu help, but for CPU speed we need to ask qemu.
>
> What about computing the frequency in rombios?
>
There is a problem with this approach. What if the host is under heavy
load when guest is started? Linux computes frequency on a startup and
have the same problem. It was discussed recently on the KVM list.

--
			Gleb.