I think some of the question revolves around changing certain records that relate to UUID, manufacturer name, etc. Many BIOS implementations have means of updating the relatively static fields for SMBIOS by, for example, populating a specific UEFI variable or generating a soft SMI. This allows it to be done at manufacturing time or, for VARs, even later.
There is no standard for setting these static fields (that is, telling the driver which populates those static records what values to use). Tim -----Original Message----- From: Andrew Fish [mailto:af...@apple.com] Sent: Thursday, August 23, 2012 8:38 AM To: edk2-devel@lists.sourceforge.net; Georg Schönberger Subject: Re: [edk2] Changing values retrieved by dmidecode On Aug 23, 2012, at 7:58 AM, Georg Schönberger wrote: > ----- Original Message ----- >> On Aug 22, 2012, at 11:01 PM, Georg Schönberger >> <gschoenber...@thomas-krenn.com> wrote: >> >>> Hello everybody, >>> >>> we, as a hardware vendor, would like to change parameter values >>> retrieved via dmidecode such as: >>> -Manufacturer >>> -Product Name >>> -Serial Number >>> - and so on... >>> >>> AFAIK with traditional BIOS we are stuck to the firmware >>> developer's/vendor's tools to achieve this. >>> My question is now, will there be an easier way to do this with >>> UEFI? >>> Can we e.g. develop an UEFI Shell application to write those >>> parameters? >>> Or are we completely dependent on our firmware providers? >>> >>> Thanks for your answers, Georg >>> >> From: "Andrew Fish" <af...@apple.com> >> To: edk2-devel@lists.sourceforge.net >> Cc: edk2-devel@lists.sourceforge.net >> Sent: Thursday, 23 August, 2012 4:23:23 PM >> Subject: Re: [edk2] Changing values retrieved by dmidecode >> >> The PI spec has a way to do this: >> https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2/MdePkg/Inclu >> de/Protocol/Smbios.h >> >> Sent from my iPhone >> > > Thanks for that hint. > > Am I right if I say that I have to write an UEFI driver to update the SMBIOS > information or can this be done from the OS also? No. Unless noted otherwise EFI protocols are boot services only, which means they go away when the OS Loader (or kernel early init) turns off EFI as part of the boot process. > Or can you provide a more detailed description about the steps that are > necessary to modify these values? > In general if you want to how a protocol gets used the best thing to do is search the code base for the GUID that names the protocol as this lets you easily find the producers and consumers of the protocol interface. In your case that is gEfiSmbiosProtocolGuid. Basically you want to look up the protocol (This will also tell you if the platform supports the API): Status = gBS->LocateProtocol (&gEfiSmbiosProtocolGuid, NULL, (VOID**)&Smbios); If you are trying to add a new record use: SmbiosHandle = 0; Status = Smbios->Add(Smbios, gImageHandle, &SmbiosHandle, YourNewRecord) If you need to update an existing record it is Smbios->GetNext() and Smbios->UpdateString() Thanks, Andrew > -Regards, Georg > > > > ---------------------------------------------------------------------- > -------- > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. > Discussions will include endpoint security, mobile security and the > latest in malware threats. > http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > edk2-devel mailing list > edk2-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/edk2-devel ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ edk2-devel mailing list edk2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/edk2-devel ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ edk2-devel mailing list edk2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/edk2-devel
