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From: "Michael Niewöhner" <linux@mniewoehner.de>
To: Mimi Zohar <zohar@linux.ibm.com>,
	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>
Cc: Nayna Jain <nayna@linux.ibm.com>
Subject: Re: [BUG] Nuvoton NCPT650 TPM 2.0 mode not working
Date: Wed, 14 Nov 2018 21:46:53 +0100
Message-ID: <4f7cc7152f2266d8d0782889db2375d4c1c71987.camel@mniewoehner.de> (raw)
In-Reply-To: <1541972556.3734.90.camel@linux.ibm.com>

Hi all,

I tried that patch mentioned by Mimi but it does not change anything for me.

Then I did some more tests with different kernel configs and finally got TPM
working by
a) compiling TPM as modules and rmmod tpm* and re-modprobe tpm_tis.

(initramfs) dmesg | grep -i tpm
[    0.000000] efi:  ACPI 2.0=0x9ea7e000 ACPI=0x9ea7e000 SMBIOS=0x9f5eb000
SMBIOS 3.0=0x9f5ea000 ESRT=0x9c07d918 MEMATTR=0x9bea3018 TPMEventLog=0x97cbb018
[    0.003793] ACPI: TPM2 0x000000009EAB7F70 000034 (v03 LENOVO TC-
S06   00001260 AMI 00000000)
(initramfs) rmmod tpm_crb tpm_tis tpm_tis_core tpm
(initramfs) modprobe tpm_tis
[   44.956905] tpm_tis MSFT0101:00: 2.0 TPM (device-id 0xFE, rev-id 2)

b) compiling TPM-support in-kernel and manually bind the ACPI device

(initramfs) dmesg | grep -i tpm
[    0.000000] efi: ACPI 2.0=0x9ea7e000 ACPI=0x9ea7e000 SMBIOS=0x9f5eb000 SMBIOS
3.0=0x9f5ea000 ESRT=0x9c07d918 MEMATTR=0x9bea3018 TPMEventLog=0x97cbb018
[    0.003546] ACPI: TPM2 0x000000009EAB7F70 000034 (v03 LENOVO TC-S06 00001260
AMI 00000000)
(initramfs) echo MSFT0101:00 >/sys/bus/platform/drivers/tpm_tis/bind
[  233.076079] tpm_tis MSFT0101:00: 2.0 TPM (device-id 0xFE, rev-id 2)


It seems to me, the kernel tries to enable the TPM to early...


Michael



  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
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 [this message]
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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