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 22:11:33 +0100 [thread overview]
Message-ID: <660b0934bc16c8d195a2724f8be4ba8dfbe71134.camel@mniewoehner.de> (raw)
In-Reply-To: <3243d0325b3ea5878d3f86b0ee4fec1498f21dc1.camel@mniewoehner.de>
On Sun, 2018-11-11 at 21:34 +0100, Michael Niewöhner wrote:
> On Sun, 2018-11-11 at 12:29 -0800, James Bottomley wrote:
> > On Sun, 2018-11-11 at 21:09 +0100, Michael Niewöhner wrote:
> > > On Sun, 2018-11-11 at 10:57 -0800, James Bottomley wrote:
> >
> > [...]
> > > > 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?
> >
> > Your ACPI parser identifies it here:
> >
> > > [ 0.003517] ACPI: TPM2 0x000000009E490ED8 000034 (v03 LENOVO TC-
> > > S06 00001300 AMI 00000000)
> >
> > So it has to be a device in the platform directory. What is in this
> > directory? To find the TPM it probably has something TPM like in the
> > firmware_node description:
> >
> > /sys/devices/platform/<dev>/firmware_node/description
> >
> > Mine says
> >
> > jejb@jarvis:~/git/linux/drivers> cat
> > /sys/devices/platform/MSFT0101\:00/firmware_node/description
> > TPM 2.0 Device
> >
>
> Ah, yep. There is indeed a MSFT0101:
> (initramfs) cat /sys/devices/platform/MSFT0101\:00/firmware_node/description
> TPM 2.0 Device
> (initramfs) cat /sys/devices/platform/MSFT0101\:00/firmware_node/hid
> MSFT0101
> (in
> itramfs) cat /sys/devices/platform/MSFT0101\:00/firmware_node/path
> \_SB_.TPM_
> (in
> itramfs) cat /sys/devices/platform/MSFT0101\:00/firmware_node/status
> 15
> (initramf
> s) cat /sys/devices/platform/MSFT0101\:00/firmware_node/uid
> 1
>
> > James
Very strange... When I pull the power cord, then replug and boot, I get these
dmesg messages:
[ 0.000000] efi: ACPI
2.0=0x9ea78000 ACPI=0x9ea78000 SMBIOS=0x9f5e5000 SMBIOS
3.0=0x9f5e4000 MPS=0xfca00 ESRT=0x9c06e918 MEMATTR=0x99cb9018 TPMEventLog=0x
98d0c018
[ 0.001794] ACPI: TPM2 0x000000009EAB1F70 000034 (v03 LENOVO TC-
S06 00001260 AMI 00000000)
[ 3.096587] tpm_tis MSFT0101:00: 2.0 TPM (device-id 0xFE, rev-id 2)
[ 3.105684] tpm tpm0: A TPM error (2314) occurred attempting the self test
After a reboot I get those "ima: ..." message again. Pulling the plug seems to
reset anything (the TPM).
The PTT TPM 2.0 shows exactly the same behaviour.
next prev parent reply other threads:[~2018-11-11 21:11 UTC|newest]
Thread overview: 24+ 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
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 [this message]
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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