Re: SMBios configuration table not present until late stage of boot

[<Jim.Dailey@dell.com>]

Not a helpful comment, but I wanted to air my feelings on the topic:

I view SMBIOS as data strictly for OS-level consumption and not for
any pre-boot code.  I'm sure I'm in the minority, however.

One of the problems is that the BIOS needs to have scanned all
devices/resources and perhaps executed a connect all before the
tables can be generated (or at least completed).

Regards,
Jim

-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Tomas Pilar (tpilar)
Sent: Thursday, May 18, 2017 10:01 AM
To: edk2-devel@lists.01.org
Subject: [edk2] SMBios configuration table not present until late stage of boot

Hi,

I am trying to read the system UUID from the System Table (Type 1) in 
the SMBios set of tables. I am doing this during DriverBinding.Start() 
part of the UEFI_DRIVER initialisation. Unfortunately the 
gST->ConfigurationTable only contains 6 tables and SMBios is not one of 
them.

Once I boot into UEFI shell or start a PXE booting process, the 
gST->ConfigurationTable now contains 8 tables and SMBios is one of the 
two new tables. If I however only boot to a HDD, this never seems to 
happen.

Can someone offer some insight why this might be so and how would I go 
about forcing the platform to provide the SMBios in 
gST->ConfigurationTable at a sensible point?

Incidentally it seems ExitBootServices is not signaled on this platform 
if the boot goes through to HDD either, which is another strange thing ...

Cheers,
Tom



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