From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: "Michael Niewöhner" <linux@mniewoehner.de>,
peterhuewe@gmx.de, jarkko.sakkinen@linux.intel.com, jgg@ziepe.ca,
arnd@arndb.de, linux-integrity@vger.kernel.org,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [BUG] Nuvoton NCPT650 TPM 2.0 mode not working
Date: Sun, 11 Nov 2018 10:57:33 -0800 [thread overview]
Message-ID: <1541962653.3190.7.camel@HansenPartnership.com> (raw)
In-Reply-To: <e8eb56fdab618770917fbe5b174328dc1240f934.camel@mniewoehner.de>
On Sun, 2018-11-11 at 19:50 +0100, Michael Niewöhner wrote:
[...]
> > However, this makes me wonder about yours:
> >
> > > [ 0.003517] ACPI: TPM2 0x000000009E490ED8 000034 (v03 LENOVO
> > > TC-
> > > S06 00001300 AMI 00000000)
> >
> > I thought the Lenovo "upgrade to 2.0" in fact disabled the external
> > TPM in favour of the Intel PTT (software TPM in the management
> > engine). Since you apparently have the tpm_crb driver that should
> > find the PTT TPM, this might be one of the attachment bugs in the
> > CRB driver ... from your ACPI output it looks to be not specifying
> > the Tpm2Tabl.
>
> Well, there are at least two implementations I know of:
> For my Lenovo X260 I can choose between Infineon TPM 1.2 or Intel PTT
> TPM 2.0 This here is my ThinkStation P320 which can choose between
> PTT 1.2, PTT 2.0,
> Nuvoton 1.2 and 2.0. When switchting between 1.2 and 2.0 the Nuvoton
> gets
> reflashed with the appropriate firmware.
Well, I still think the ACPI setup is incorrect. What's in
/sys/class/platform (should be directories of ACPI devices)? The TPM
is supposed to show up as MSFT0101. If it doesn't is there any other
device string in there that might be a TPM?
James
next prev parent reply other threads:[~2018-11-11 18:57 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-11 17:55 [BUG] Nuvoton NCPT650 TPM 2.0 mode not working Michael Niewöhner
2018-11-11 18:24 ` James Bottomley
2018-11-11 18:50 ` Michael Niewöhner
2018-11-11 18:57 ` James Bottomley [this message]
2018-11-11 20:09 ` Michael Niewöhner
2018-11-11 20:29 ` James Bottomley
2018-11-11 20:34 ` Michael Niewöhner
2018-11-11 21:11 ` Michael Niewöhner
2018-11-11 21:42 ` Mimi Zohar
2018-11-14 20:46 ` Michael Niewöhner
2018-11-16 21:06 ` Michael Niewöhner
2018-11-18 8:18 ` Jarkko Sakkinen
2018-11-18 14:10 ` Michael Niewöhner
2018-11-19 13:49 ` Jarkko Sakkinen
2018-11-25 20:06 ` Michael Niewöhner
2018-11-26 19:15 ` Michael Niewöhner
2018-11-26 21:13 ` Jarkko Sakkinen
2018-11-27 22:31 ` Ken Goldman
2018-11-28 15:04 ` Michael Niewöhner
2018-11-13 10:50 ` Jarkko Sakkinen
2019-01-11 15:40 ` Mimi Zohar
2019-01-12 9:52 ` Michael Niewöhner
2019-01-12 10:49 ` Michael Niewöhner
2018-11-11 18:33 ` Mimi Zohar
2018-11-11 18:51 ` Michael Niewöhner
2018-11-13 10:28 ` Jarkko Sakkinen
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