I can confirm coreboot has no issue to support 64 bit UEFI payload, it's already verified.

Can you please provide more information of your coreboot/payload? Like, coreboot revision/commit ID, payload revision/commid ID, FSP revision, platform details (CRB or OEM platform) etc.

On Thu, Sep 21, 2017 at 10:20 AM, Melissa Yi <huayi@celestica.com> wrote:
Hi 
   I want to know whether coreboot supports 64bit UEFI payload on denverton platform?
   Attached the fail log.

Thanks.

Regards,
Melissa Yi

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