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From: "Michael Niewöhner" <linux@mniewoehner.de>
To: James Bottomley <James.Bottomley@HansenPartnership.com>,
	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 21:09:19 +0100
Message-ID: <7d8cc5ad4bb7548d283f363de6f24c90d5d0a2b2.camel@mniewoehner.de> (raw)
In-Reply-To: <1541962653.3190.7.camel@HansenPartnership.com>


On Sun, 2018-11-11 at 10:57 -0800, James Bottomley wrote:
> 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?

Nope. I'm not sure if it should show up in ACPI... isn't TPM 2.0 I2C?

$ find /sys | grep -i tpm
/sys/class/tpmrm
/sys/class/tpm
/sys/bus/platform/drivers/tpm_tis
/sys/bus/platform/drivers/tpm_tis/uevent
/sys/bus/platform/drivers/tpm_tis/bind
/sys/bus/platform/drivers/tpm_tis/unbind
/sys/bus/pnp/drivers/tpm_tis
/sys/bus/pnp/drivers/tpm_tis/uevent
/sys/bus/pnp/drivers/tpm_tis/bind
/sys/bus/pnp/drivers/tpm_tis/unbind
/sys/bus/acpi/drivers/tpm_crb
/sys/bus/acpi/drivers/tpm_crb/uevent
/sys/bus/acpi/drivers/tpm_crb/bind
/sys/bus/acpi/drivers/tpm_crb/unbind
/sys/bus/i2c/drivers/tpm_i2c_nuvoton
/sys/bus/i2c/drivers/tpm_i2c_nuvoton/uevent
/sys/bus/i2c/drivers/tpm_i2c_nuvoton/bind
/sys/bus/i2c/drivers/tpm_i2c_nuvoton/unbind


> 
> James
> 



  reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-11 17:55 Michael Niewöhner
2018-11-11 18:24 ` James Bottomley
2018-11-11 18:50   ` Michael Niewöhner
2018-11-11 18:57     ` James Bottomley
2018-11-11 20:09       ` Michael Niewöhner [this message]
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
2018-11-13 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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