On Thu, Feb 07, 2019 at 07:41:56PM +0100, Alexander Steffen wrote:
On 06.02.2019 13:06, Jarkko Sakkinen wrote:Weird.
On Wed, Feb 06, 2019 at 12:47:07AM +0200, Jarkko Sakkinen wrote:Something in this series seems to break basic TPM communication for me.
Make the changes necessary to detach TPM space code and TPM activationApplied to master and next.
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.
v11:
* Drop the patch that tries to flush TPM space on system. Not a proper
fallback + out of scope for this patch set.
v10:
* Use void pointers to avoid unnecessary casts in functions paramaters
where it makes sense.
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 (16):
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: 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 | 44 ++++-
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 | 91 +++++++---
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, 408 insertions(+), 421 deletions(-)
--
2.19.1
For TPM2.0s the probe command fails, causing them to be misdetected as
TPM1.2s:
---
tpm tpm0: tpm_try_transmit: tpm_send: error -5
tpm_tis MSFT0101:00: 1.2 TPM (device-id 0x1A, rev-id 22)
tpm tpm0: A TPM error (30) occurred attempting to determine the timeouts
---
tpm tpm0: tpm_try_transmit: tpm_send: error -5
tpm_tis_spi spi0.1: 1.2 TPM (device-id 0x1B, rev-id 22)
tpm tpm0: A TPM error (30) occurred attempting to determine the timeouts
---
And for something that actually is a TPM1.2 it fails in a similar way:
---
tpm_i2c_infineon 1-0020: 1.2 TPM (device-id 0x1A)
tpm tpm0: A TPM error (-14) occurred attempting to determine the timeouts
---
tpm tpm0: tpm_try_transmit: tpm_send: error -5
tpm_tis_spi spi0.1: 1.2 TPM (device-id 0x1B, rev-id 16)
tpm tpm0: A TPM error (-14) occurred attempting to determine the timeouts
tpm_tis_spi: probe of spi0.1 failed with error -14
---
I see this problem across my entire range of TPM devices and test platforms.
Any idea what could be wrong here?
Can you run a bisect?
/Jarkko