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From: | Sebastian Herbszt |
Subject: | [Qemu-devel] Re: Re: [PATCH v2 6/6] Pass cpu speed into SM BIOS. |
Date: | Thu, 28 Aug 2008 01:42:59 +0200 |
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 thatproposed 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?
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?
Using real HW value seams to be better than just provide some default one.What downside does using a default value have? On the upside this patch would not be needed.What value do you propose? Without knowing how Windows uses it we can't say what are the downsides.
- Sebastian
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