> Current UEFI payload uses an generic emulated variable driver provided in EDK2 MdeModulePkg.
Thank you for that info, Maurice. Was looking for this (right entry point) for very long time! :-) Zoran On Thu, Mar 23, 2017 at 1:56 AM, Ma, Maurice <[email protected]> wrote: > Hi, Sibiļ¼ > > > > Yes, UEFI payload follows the same way as standard UEFI FW on boot order > handling. You will have to enable a NVRAM variable driver in order to > maintain the boot options and order. > > > > Current UEFI payload uses an generic emulated variable driver provided in > EDK2 MdeModulePkg. With this driver, the variable will be lost after > reboot since it is stored in memory. > > To store it in NVRAM, you will then need to develop or port a flash > based variable driver, and then replace the emulated variable driver. This > part is very platform and silicon specific. > > > > Thanks > > Maurice > > *From:* Leahy, Leroy P > *Sent:* Wednesday, March 22, 2017 4:51 PM > *To:* [email protected]; [email protected]; Ma, Maurice < > [email protected]>; Agyeman, Prince <[email protected]> > *Subject:* Re: Maintain boot order for multiple EFI based OS > > > > Hi Maurice and Prince, > > > > Would you please help answer the question below? > > > > Hi Sibi, > > > > The maintainers for the various EDK-II packages can be found in > payloads/external/tianocore/tianocore/Maintainers.txt. In your case, > search for CorebootPayloadPkg. > > > > Lee Leahy > > > > *From:* coreboot [mailto:[email protected] > <[email protected]>] *On Behalf Of *[email protected] > *Sent:* Wednesday, March 22, 2017 6:20 AM > *To:* [email protected] > *Subject:* [coreboot] Maintain boot order for multiple EFI based OS > > > > *Dell - Internal Use - Confidential * > > Hi, > > > > We are using the coreboot project with Intel fsp to boot the Intel > Rangeley based Mohonpeak CPU. We have built the Tianocore EDK2 project and > used it as the payload to bring UEFI services to this bootloader. With this > payload, we are able to boot a EFI based OS successfully. > > > > As a next step, we are looking at installing multiple EFI OS and > maintaining boot order among the OS. > > How is boot order maintained with UEFI payload? > > Is it through EFI NVRAM variables? If so, does coreboot support NVRAM > variables? > > > > Can you please point us in the right direction. > > > > Thanks, > > Sibi > > -- > coreboot mailing list: [email protected] > https://www.coreboot.org/mailman/listinfo/coreboot >
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