[PATCH 0/6] x86: efi: Add a 64-bit coreboot payload

[Heinrich Schuchardt]

On 4/23/20 10:05 AM, Bin Meng wrote:
> Hi Simon,
>
> On Mon, Apr 6, 2020 at 7:22 AM Simon Glass <sjg at chromium.org> wrote:
>>
>> This series creates a new 64-bit 'coreboot64' build which can be launched
>> from coreboot. It uses SPL to effect the jump to 64-bit mode.
>
> Adding 64-bit U-Boot as a coreboot payload is nice.
>
>>
>> This was done in an attempt to get the Ubuntu FirmwareTestSuite[1]
>
> Yet I fail to understand why adding 64-bit U-Boot as the coreboot
> payload could help running the Ubuntu Firmware Test Suite. Does 32-bit
> U-Boot as the coreboot payload not work in this case?

coreboot_defconfig has CONFIG_EFI_LOADER=y so the firmware test suite
should work fine if you are running a 32 bit OS.

Of cause calling a 32bit UEFI from a 64bit OS is expected fail due to a
different ABI.

Best regards

Heinrich

>
>> working. Unfortunately the latest version shows a splash screen and hangs,
>> perhaps due to some missing EFI support.
>>
>> [1] https://wiki.ubuntu.com/FirmwareTestSuite
>>
>>
>
> Regards,
> Bin
>