Re: [PATCH v9 00/17] Removed nested TPM operations

Stefan Berger
2018-11-19T14:23:12Z

On 11/18/18 7:47 AM, Jarkko Sakkinen wrote:
> [was Detach TPM space code out of the tpm_transmit() flow but the scope
> expanded a bit.]
>
> Make the changes necessary to detach TPM space code and TPM activation
> code out of the tpm_transmit() flow because of both of these can cause
> nested tpm_transmit() calls. The nesteds calls make the whole flow hard
> to maintain, and thus, it is better to just fix things now before this
> turns into a bigger mess.

Tested this series with the vtpm proxy test cases:

Tested-by: Stefan Berger <stefanb@linux.ibm.com>

>
> v9:
> * Fixed again tpm_try_get_ops().
> * Added missing reviewed-by's.
>
> v8:
> * Re-add the check for ret < 0 after calling tpm_try_transmit() that
> was dropped by mistake while moving code.
> * Fix error fallback for tpm_try_get_ops() when tpm_chip_start()
> fails.
>
> v7:
> * Reorganize series so that more trivial and self-contained changes are
> in the head.
>
> v6:
> * When tpm_validate_commmand() was moved to tpm2-space.c, the struct for
> the TPM header was incorrectly declared as struct tpm_input_header.
> * Fix return value in tpm_validate_command().
>
> v5:
> * Add the missing rev's from Stefan Berger.
>
> v4:
> * Return 0 from pcrs_show() when tpm1_pcr_read() fails.
> * Fix error handling flow in tpm_try_transmit().
> * Replace struct tpm_input_header and struct tpm_output_header with
> struct tpm_header.
>
> v3:
> * Encapsulate power gating code to tpm_chip_start() and tpm_chip_stop().
> * Move TPM power gating code and locking to tpm_try_get_ops() and
> tpm_put_ops().
> * Call power gating code directly in tpm_chip_register() and
> tpm2_del_space().
>
> v2:
> * Print tpm2_commit_space() error inside tpm2_commit_space()
> * Error code was not printed when recv() callback failed. It is
> fixed in this version.
> * Added a patch that removes @space from tpm_transmit().
> * Fixed a regression in earlier series. Forgot to amend the change
> from the staging area that renames NESTED to UNLOCKED in tpm2-space.c.
>
> Jarkko Sakkinen (17):
> tpm: use tpm_buf in tpm_transmit_cmd() as the IO parameter
> tpm: fix invalid return value in pubek_show()
> tpm: return 0 from pcrs_show() when tpm1_pcr_read() fails
> tpm: print tpm2_commit_space() error inside tpm2_commit_space()
> tpm: declare struct tpm_header
> tpm: access command header through struct in tpm_try_transmit()
> tpm: encapsulate tpm_dev_transmit()
> tpm: call tpm2_flush_space() on error in tpm_try_transmit()
> tpm: clean up tpm_try_transmit() error handling flow
> tpm: move tpm_validate_commmand() to tpm2-space.c
> tpm: move TPM space code out of tpm_transmit()
> tpm: remove @space from tpm_transmit()
> tpm: use tpm_try_get_ops() in tpm-sysfs.c.
> tpm: remove TPM_TRANSMIT_UNLOCKED flag
> tpm: introduce tpm_chip_start() and tpm_chip_stop()
> tpm: take TPM chip power gating out of tpm_transmit()
> tpm: remove @flags from tpm_transmit()
>
> drivers/char/tpm/tpm-chip.c | 109 ++++++++++++
> drivers/char/tpm/tpm-dev-common.c | 45 ++++-
> drivers/char/tpm/tpm-interface.c | 264 ++++++------------------------
> drivers/char/tpm/tpm-sysfs.c | 138 ++++++++++------
> drivers/char/tpm/tpm.h | 64 +++-----
> drivers/char/tpm/tpm1-cmd.c | 28 +---
> drivers/char/tpm/tpm2-cmd.c | 72 +++-----
> drivers/char/tpm/tpm2-space.c | 93 ++++++++---
> drivers/char/tpm/tpm_i2c_atmel.c | 5 +-
> drivers/char/tpm/tpm_vtpm_proxy.c | 12 +-
> drivers/char/tpm/xen-tpmfront.c | 2 +-
> 11 files changed, 410 insertions(+), 422 deletions(-)
>