linux-kernel - Re: tpm_tis TPM2.0 not detected on cold boot

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Message-ID: <20190103134147.GE10491@linux.intel.com>
Date:   Thu, 3 Jan 2019 15:41:47 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Michael Niewöhner 
        <niewoehner.michael@...il.com>
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>,
        Ken Goldman <kgold@...ux.ibm.com>
Subject: Re: tpm_tis TPM2.0 not detected on cold boot

On Sun, Dec 16, 2018 at 02:32:38PM +0100, Michael Niewöhner wrote:
 
> dmesg cold boot with tpm_tis.interrupts=0 tpm_tis.force=1:
> ----------------------------------------------------------
> > dmesg | grep -i tpm
> [    0.000000] Command line: initrd=\initrd-test console=ttyS0,115200n8
> break=premount tpm_tis.interrupts=0 tpm_tis.force=1
> [    0.000000] efi:  ACPI
> 2.0=0x9e07e000  ACPI=0x9e07e000  SMBIOS=0x9ebeb000  SMBIOS
> 3.0=0x9ebea000  MEMATTR=0x98fb2018  TPMEventLog=0x972bb018 
> [    0.003531] ACPI: TPM2 0x000000009E0B7F70 000034 (v03 LENOVO TC-
> S06   00001260 AMI  00000000)
> [    0.162005] Kernel command line: initrd=\initrd-test console=ttyS0,115200n8
> break=premount tpm_tis.interrupts=0 tpm_tis.force=1
> [    3.616806] tpm_tis MSFT0101:00: 2.0 TPM (device-id 0xFE, rev-id 2)
> [    3.683117] tpm_tis tpm_tis: can't request region for resource [mem
> 0xfed40000-0xfed44fff]
> [    3.691378] tpm_tis: probe of tpm_tis failed with error -16
> [    4.572539] ima: Error Communicating to TPM chip

Wonder why this happens. What does /proc/iomem show?

/Jarkko