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

["Tomas Pilar (tpilar)" <tpilar@solarflare.com>]

This is what I was afraid of. I am writing an IHV network driver that 
lives in optionROM.

Cheers,
Tom

On 18/05/17 16:25, Jim.Dailey@dell.com wrote:
> It is a tricky problem.
>
> What I would like is for a new protocol to be defined, which should
> not rely on devices, to contain certain identifying information
> like this that would be useful to device drivers. It could be
> created early in DXE.
>
> What I fear is some future requirement that SMBIOS be made available
> at some definitive time pre-OS boot.
>
> You may have to get support from the BIOS vendor. If you are doing a
> driver for a particular system, that might not be too bad of a
> solution; but if you're trying to develop some generic driver, I
> don't have a good suggestion.
>
> 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 10:14 AM
> To: Dailey, Jim <Jim_Dailey@Dell.com>
> Cc: edk2-devel@lists.01.org
> Subject: Re: [edk2] SMBios configuration table not present until late stage of boot
>
> This does make sense. Do you have a suggestion how I would go about
> finding/creating a unique identifier for the system during preboot?
>
> Cheers,
> Tom
>
> On 18/05/17 16:11, Jim.Dailey@dell.com wrote:
>> 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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