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| author | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2014-12-12 11:46:39 -0800 |
|---|---|---|
| committer | Peter Huewe <peterhuewe@gmx.de> | 2015-01-17 14:00:12 +0100 |
| commit | 30fc8d138e9123f374a3c3867e7c7c5cd4004941 (patch) | |
| tree | ba7d83a8271e9cc9fe57864c97cfcb28d5484423 /drivers/char/tpm/tpm-interface.c | |
| parent | 7a1d7e6dd76a2070e2d86826391468edc33bb6d6 (diff) | |
| download | linux-30fc8d138e9123f374a3c3867e7c7c5cd4004941.tar.bz2 | |
tpm: TPM 2.0 CRB Interface
tpm_crb is a driver for TPM 2.0 Command Response Buffer (CRB) Interface
as defined in PC Client Platform TPM Profile (PTP) Specification.
Only polling and single locality is supported as these are the limitations
of the available hardware, Platform Trust Techonlogy (PTT) in Haswell
CPUs.
The driver always applies CRB with ACPI start because PTT reports using
only ACPI start as start method but as a result of my testing it requires
also CRB start.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jasob Gunthorpe <jason.gunthorpe@obsidianresearch.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'drivers/char/tpm/tpm-interface.c')
| -rw-r--r-- | drivers/char/tpm/tpm-interface.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 20cf94d31386..bf53a3771da5 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -901,6 +901,9 @@ int tpm_pm_suspend(struct device *dev) if (chip == NULL) return -ENODEV; + if (chip->flags & TPM_CHIP_FLAG_TPM2) + return tpm2_shutdown(chip, TPM2_SU_CLEAR); + /* for buggy tpm, flush pcrs with extend to selected dummy */ if (tpm_suspend_pcr) { cmd.header.in = pcrextend_header; |