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SubjectRe: [PATCH v11 00/16] Remove nested TPM operations
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On 06.02.2019 13:06, Jarkko Sakkinen wrote:
> On Wed, Feb 06, 2019 at 12:47:07AM +0200, Jarkko Sakkinen wrote:
>> 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.
>>
>> 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
>>
>
> Applied to master and next.

Something in this series seems to break basic TPM communication for me.

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?

Alexander

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