linux-kernel - Re: [BUG] Nuvoton NCPT650 TPM 2.0 mode not working

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Message-ID: <20181126211309.GA868@linux.intel.com>
Date:   Mon, 26 Nov 2018 13:13:09 -0800
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Michael Niewöhner <linux@...ewoehner.de>
Cc:     Mimi Zohar <zohar@...ux.ibm.com>,
        James Bottomley <James.Bottomley@...senPartnership.com>,
        peterhuewe@....de, jgg@...pe.ca, arnd@...db.de,
        linux-integrity@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Nayna Jain <nayna@...ux.ibm.com>
Subject: Re: [BUG] Nuvoton NCPT650 TPM 2.0 mode not working

On Mon, Nov 26, 2018 at 08:15:38PM +0100, Michael Niewöhner wrote:
> Hi again,
> 
> after some experiments I finally found a solution...
> There seems to be a bug in TPM2.0 firmware version (1.3.1.0) included in Lenovos
> UEFI image but they do not provide an update.
> 
> I have extracted the firmware version 1.3.2.8 from Dell's XPS15 TPM2.0 firmware
> update and used this to replace the firmware in my Lenovo UEFI image.
> After flashing this version via UEFI Setup the TPM2.0 gets detected and now is
> fully working. WTF.

That can be called as true craftmanship :-) Awesome work! Maybe you
should even consider blogging this. Sounds interesting.

> For anyone having the same problem: binwalk, uefi-firmware-parser, uefipatch and
> flashrom are your friends ;-)
> 
> Best regards
> Michael

/Jarkko