linux.git/drivers/char/tpm, branch v4.9

tpm: remove invalid min length check from tpm_do_selftest()

2016-10-31T15:15:27+00:00

Removal of this check was not properly amended to the original commit.

Cc: stable@vger.kernel.org
Fixes: 0c541332231e ("tpm: use tpm_pcr_read_dev() in tpm_do_selftest()")
Signed-off-by: Jarkko Sakkinen 
Signed-off-by: James Morris

Revert "tpm/tpm_crb: implement tpm crb idle state"

2016-09-27T09:02:13+00:00

This reverts commit e17acbbb69d30836a8c12e2c09bbefab8656693e.

Signed-off-by: Jarkko Sakkinen

Revert "tmp/tpm_crb: fix Intel PTT hw bug during idle state"

2016-09-27T09:01:43+00:00

This reverts commit 9514ff1961c6f0f5983ba72d94f384bc13e0d4a1.

Signed-off-by: Jarkko Sakkinen

Revert "tpm/tpm_crb: open code the crb_init into acpi_add"

2016-09-27T09:01:25+00:00

This reverts commit 0c22db435bf79d3cf3089df7ff198d4867df3c27.

Signed-off-by: Jarkko Sakkinen

Revert "tmp/tpm_crb: implement runtime pm for tpm_crb"

2016-09-27T09:00:13+00:00

This reverts commit e350e24694e447e6ab7312fffae5ca31a0bb5165.

Signed-off-by: Jarkko Sakkinen

tmp/tpm_crb: implement runtime pm for tpm_crb

2016-09-16T12:51:22+00:00

Utilize runtime_pm for driving tpm crb idle states.
The framework calls cmd_ready from the pm_runtime_resume handler
and go idle from the pm_runtime_suspend handler.
The TPM framework should wake the device before transmit and receive.
In case the runtime_pm framework is not enabled, the device will be in
ready state.

[jarkko.sakkinen@linux.intel.com: changed pm_runtime_put_sync()
 to pm_runtime_put()]

Signed-off-by: Tomas Winkler 
Reviewed-by: Jarkko Sakkinen 
Tested-by: Jarkko Sakkinen

tpm/tpm_crb: open code the crb_init into acpi_add

2016-09-16T12:47:52+00:00

This is preparation step for implementing tpm crb
runtime pm. We need to have tpm chip allocated
and populated before we access the runtime handlers.

Signed-off-by: Tomas Winkler 
Tested-by: Jarkko Sakkinen

tmp/tpm_crb: fix Intel PTT hw bug during idle state

2016-09-16T12:47:45+00:00

There is a HW bug in Skylake, and Broxton PCH Intel PTT device, where
most of the registers in the control area except START, REQUEST, CANCEL,
and LOC_CTRL lost retention when the device is in the idle state. Hence
we need to bring the device to ready state before accessing the other
registers. The fix brings device to ready state before trying to read
command and response buffer addresses in order to remap the for access.

Signed-off-by: Tomas Winkler 
Tested-by: Jarkko Sakkinen 
Reviewed-by: Jarkko Sakkinen

tpm/tpm_crb: implement tpm crb idle state

2016-09-16T12:47:36+00:00

The register TPM_CRB_CTRL_REQ_x contains bits goIdle and cmdReady for
SW to indicate that the device can enter or should exit the idle state.

The legacy ACPI-start (SMI + DMA) based devices do not support these
bits and the idle state management is not exposed to the host SW.
Thus, this functionality only is enabled only for a CRB start (MMIO)
based devices.

Based on Jarkko Sakkinen 
original patch:
'tpm_crb: implement power tpm crb power management'

To keep the implementation local to the hw we don't use wait_for_tpm_stat
for polling the TPM_CRB_CTRL_REQ.

Signed-off-by: Tomas Winkler 
Reviewed-by: Jarkko Sakkinen 
Tested-by: Jarkko Sakkinen

tpm: add check for minimum buffer size in tpm_transmit()

2016-09-15T13:04:21+00:00

tpm_transmit() does not check that bufsiz is at least TPM_HEADER_SIZE
before accessing data. This commit adds this check and returns -EINVAL
if it fails.

Signed-off-by: Jarkko Sakkinen