Generate microcode from tree not working

[Alec Ari]

Hello! Someone recently contacted me directly about my MA785GM-US2H coreboot port, and they weren't able to get the microcode to generate:

HOSTCC     cbfstool/cbfstool (link)
    LD         cpu_microcode_blob.o
coreboot/util/crossgcc/xgcc/bin/i386-elf-ld: no input files
make: *** [build/cpu_microcode_blob.o] Error 1

I've tested the compilation process here too and I get the same problem, not sure how to fix it. It doesn't work for me no matter what board I select in Kconfig.

Please note I am not subscribed to the coreboot mailing list so if you have a response, I kindly suggest you CC the email to me directly.

Alec Ari

[Aaron Durbin]

The error comes from the following:

http://review.coreboot.org/gitweb?p=coreboot.git;a=blob;f=src/cpu/Makefile.i...

What are the following Kconfig options set to when you build?

CONFIG_CPU_MICROCODE_CBFS_GENERATE
CONFIG_CPU_MICROCODE_CBFS_EXTERNAL

On Mon, Jul 15, 2013 at 5:39 AM, Alec Ari  wrote:
> Hello! Someone recently contacted me directly about my MA785GM-US2H coreboot port, and they weren't able to get the microcode to generate:
> HOSTCC     cbfstool/cbfstool (link)
> LD         cpu_microcode_blob.o
>
> coreboot/util/crossgcc/xgcc/bin/i386-elf-ld: no input files
> make: *** [build/cpu_microcode_blob.o] Error 1
>
> I've tested the compilation process here too and I get the same problem, not sure how to fix it. It doesn't work for me no matter what board I select in Kconfig.
>
> Please note I am not subscribed to the coreboot mailing list so if you have a response, I kindly suggest you CC the email to me directly.
>
> Alec Ari

[Alex G.]

On 07/15/2013 05:39 AM, Alec Ari wrote:
> Hello! Someone recently contacted me directly about my MA785GM-US2H coreboot port, and they weren't able to get the microcode to generate:
> HOSTCC     cbfstool/cbfstool (link)
> LD         cpu_microcode_blob.o
>
> coreboot/util/crossgcc/xgcc/bin/i386-elf-ld: no input files
> make: *** [build/cpu_microcode_blob.o] Error 1

Oh nom nom nom. Your CPU has not been ported to loading microcode from CBFS.
> I've tested the compilation process here too and I get the same problem, not sure how to fix it. It doesn't work for me no matter what board I select in Kconfig.

We're a bunch of old wizard farts using grep blackmagic.

config CPU_MICROCODE_IN_CBFS
        default CPU_MICROCODE_CBFS_GENERATE if CPU_MICROCODE_IN_CBFS
        default CPU_MICROCODE_CBFS_NONE if !CPU_MICROCODE_IN_CBFS

The rest is left as an excercise to the reader.