xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

tpm: TPM 2.0 baseline support

Browse Source 
TPM 2.0 devices are separated by adding a field 'flags' to struct
tpm_chip and defining a flag TPM_CHIP_FLAG_TPM2 for tagging them.

This patch adds the following internal functions:

- tpm2_get_random()
- tpm2_get_tpm_pt()
- tpm2_pcr_extend()
- tpm2_pcr_read()
- tpm2_startup()

Additionally, the following exported functions are implemented for
implementing TPM 2.0 device drivers:

- tpm2_do_selftest()
- tpm2_calc_ordinal_durations()
- tpm2_gen_interrupt()

The existing functions that are exported for the use for existing
subsystems have been changed to check the flags field in struct
tpm_chip and use appropriate TPM 2.0 counterpart if
TPM_CHIP_FLAG_TPM2 is est.

The code for tpm2_calc_ordinal_duration() and tpm2_startup() were
originally written by Will Arthur.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Will Arthur <will.c.arthur@intel.com>
Reviewed-by: Jasob Gunthorpe <jason.gunthorpe@obsidianresearch.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Peter Huewe <peterhuewe@gmx.de>
Tested-by: Peter Huewe <peterhuewe@gmx.de>

[phuewe: Fixed copy paste error * 2]
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
This commit is contained in:
Jarkko Sakkinen
2014-12-12 11:46:38 -08:00
committed by Peter Huewe
parent 313d21eeab
commit 7a1d7e6dd7
5 changed files with 721 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/char/tpm/tpm-chip.c
View File

@@ -195,15 +195,18 @@ int tpm_chip_register(struct tpm_chip *chip)
if (rc)
return rc;
rc = tpm_sysfs_add_device(chip);
if (rc)
goto del_misc;
/* Populate sysfs for TPM1 devices. */
if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
rc = tpm_sysfs_add_device(chip);
if (rc)
goto del_misc;
rc = tpm_add_ppi(chip);
if (rc)
goto del_sysfs;
rc = tpm_add_ppi(chip);
if (rc)
goto del_sysfs;
chip->bios_dir = tpm_bios_log_setup(chip->devname);
chip->bios_dir = tpm_bios_log_setup(chip->devname);
}
/* Make the chip available. */
spin_lock(&driver_lock);
@@ -241,10 +244,12 @@ void tpm_chip_unregister(struct tpm_chip *chip)
spin_unlock(&driver_lock);
synchronize_rcu();
if (chip->bios_dir)
tpm_bios_log_teardown(chip->bios_dir);
tpm_remove_ppi(chip);
tpm_sysfs_del_device(chip);
if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
if (chip->bios_dir)
tpm_bios_log_teardown(chip->bios_dir);
tpm_remove_ppi(chip);
tpm_sysfs_del_device(chip);
}
tpm_dev_del_device(chip);
}