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[Qemu-devel] Re: [PATCH][SEABIOS] Make SMBIOS table pass MS SVVP test

From: Kevin O'Connor
Subject: [Qemu-devel] Re: [PATCH][SEABIOS] Make SMBIOS table pass MS SVVP test
Date: Tue, 24 Nov 2009 10:57:02 -0500
User-agent: Mutt/1.5.19 (2009-01-05)

On Mon, Nov 23, 2009 at 08:30:41PM +0200, Gleb Natapov wrote:
> On Mon, Nov 23, 2009 at 07:15:55PM +0100, Sebastian Herbszt wrote:
> > Ok - sounds good if bios_characteristics gets proper system based values.
> > 
> Kevin can you help here. I can send a patch, but I am not sure I know
> everything SeaBIOS supports.

I don't know what bios_characteristics should be set to.

SeaBIOS does generate the smbios table even on coreboot.  This is a
hack to work around the fact that coreboot boards don't generate
smbios tables currently and Linux wont use ACPI unless an smbios table
is present.  So, the smbios table is just used to make Linux accept
the acpi table.  It is not a requirement that SeaBIOS be able to
generate fully populated and correct smbios tables for coreboot - it's
understood that any coreboot user that needs a full smbios table needs
to have that table generated by coreboot itself.

That said, I think SeaBIOS should autodetect any values where that's
feasible.  So, for example, if the cpu identification is available via
cpuid, then I think that should be used.  However, for example, if cpu
model isn't available anywhere, then I think hardcoding something is

> > >>>>>>>-    p->max_speed = 0; /* unknown */
> > >>>>>>>-    p->current_speed = 0; /* unknown */
> > >>>>>>>+    p->max_speed = 2000;
> > >>>>>>>+    p->current_speed = 2000;

SeaBIOS detects the current Mhz - see calibrate_tsc() in src/clock.c.


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