kernel/linux.git/drivers/char/tpm/Makefile, branch v5.10.264

tpm: tis: add support for MMIO TPM on SynQuacer

2020-10-01T21:21:02+00:00

When fitted, the SynQuacer platform exposes its SPI TPM via a MMIO window that is backed by the SPI command sequencer in the SPI bus controller. This arrangement has the limitation that only byte size accesses are supported, and so we'll need to provide a separate module that take this into account. Signed-off-by: Ard Biesheuvel Signed-off-by: Masahisa Kojima Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen

tpm: Revert tpm_tis_spi_mod.ko to tpm_tis_spi.ko.

2020-02-17T18:46:34+00:00

Revert tpm_tis_spi_mod.ko back to tpm_tis_spi.ko as the rename could break user space scripts. This can be achieved by renaming tpm_tis_spi.c as tpm_tis_spi_main.c. Then tpm_tis_spi-y can be used inside the makefile. Cc: Andrey Pronin Cc: Stephen Boyd Cc: stable@vger.kernel.org # 5.5.x Fixes: 797c0113c9a4 ("tpm: tpm_tis_spi: Support cr50 devices") Reported-by: Alexander Steffen Tested-by: Alexander Steffen Reviewed-by: Stephen Boyd Signed-off-by: Jarkko Sakkinen

tpm: tpm_tis_spi: Support cr50 devices

2019-11-12T19:45:37+00:00

Add TPM2.0 PTP FIFO compatible SPI interface for chips with Cr50 firmware. The firmware running on the currently supported H1 Secure Microcontroller requires a special driver to handle its specifics: - need to ensure a certain delay between SPI transactions, or else the chip may miss some part of the next transaction - if there is no SPI activity for some time, it may go to sleep, and needs to be waken up before sending further commands - access to vendor-specific registers Cr50 firmware has a requirement to wait for the TPM to wakeup before sending commands over the SPI bus. Otherwise, the firmware could be in deep sleep and not respond. The method to wait for the device to wakeup is slightly different than the usual flow control mechanism described in the TCG SPI spec. Add a completion to tpm_tis_spi_transfer() before we start a SPI transfer so we can keep track of the last time the TPM driver accessed the SPI bus to support the flow control mechanism. Split the cr50 logic off into a different file to keep it out of the normal code flow of the existing SPI driver while making it all part of the same module when the code is optionally compiled into the same module. Export a new function, tpm_tis_spi_init(), and the associated read/write/transfer APIs so that we can do this. Make the cr50 code wrap the tpm_tis_spi_phy struct with its own struct to override the behavior of tpm_tis_spi_transfer() by supplying a custom flow control hook. This shares the most code between the core driver and the cr50 support without combining everything into the core driver or exporting module symbols. Signed-off-by: Andrey Pronin Cc: Andrey Pronin Cc: Duncan Laurie Cc: Jason Gunthorpe Cc: Arnd Bergmann Cc: Greg Kroah-Hartman Cc: Guenter Roeck Cc: Alexander Steffen Cc: Heiko Stuebner [swboyd@chromium.org: Replace boilerplate with SPDX tag, drop suspended bit and remove ifdef checks in cr50.h, migrate to functions exported in tpm_tis_spi.h, combine into one module instead of two] Signed-off-by: Stephen Boyd Tested-by: Heiko Stuebner Reviewed-by: Heiko Stuebner Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen

tpm/tpm_ftpm_tee: A driver for firmware TPM running inside TEE

2019-09-02T14:08:35+00:00

Add a driver for a firmware TPM running inside TEE. Documentation of the firmware TPM: https://www.microsoft.com/en-us/research/publication/ftpm-software-implementation-tpm-chip/ . Implementation of the firmware TPM: https://github.com/Microsoft/ms-tpm-20-ref/tree/master/Samples/ARM32-FirmwareTPM Tested-by: Ilias Apalodimas Tested-by: Thirupathaiah Annapureddy Signed-off-by: Thirupathaiah Annapureddy Co-authored-by: Sasha Levin Signed-off-by: Sasha Levin Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen

tpm: factor out tpm 1.x duration calculation to tpm1-cmd.c

2018-11-13T11:46:29+00:00

Factor out TPM 1.x commands calculation into tpm1-cmd.c file. and change the prefix from tpm_ to tpm1_. No functional change is done here. Signed-off-by: Tomas Winkler Tested-by: Jarkko Sakkinen Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen

tpm: sort objects in the Makefile

2018-11-13T11:46:29+00:00

Make the tpm Makefile a bit more in order by putting objects in one column. Signed-off-by: Tomas Winkler Tested-by: Jarkko Sakkinen Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen

tpm: Move shared eventlog functions to common.c

2018-05-09T11:45:46+00:00

Functions and structures specific to TPM1 are renamed from tpm* to tpm1*. Signed-off-by: Thiebaud Weksteen Suggested-by: Jarkko Sakkinen Reviewed-by: Jarkko Sakkinen Tested-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen

tpm: Move eventlog files to a subdirectory

2018-05-09T11:45:46+00:00

Signed-off-by: Thiebaud Weksteen Suggested-by: Jarkko Sakkinen Reviewed-by: Jarkko Sakkinen Tested-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen

tpm: parse TPM event logs based on EFI table

2018-01-08T10:58:35+00:00

If we are not able to retrieve the TPM event logs from the ACPI table, check the EFI configuration table (Linux-specific GUID). The format version of the log is now returned by the provider function. Signed-off-by: Thiebaud Weksteen Reviewed-by: Jason Gunthorpe Reviewed-by: Javier Martinez Canillas Tested-by: Javier Martinez Canillas Tested-by: Jarkko Sakkinen Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen

tpm: rename event log provider files

2018-01-08T10:58:34+00:00

Rename the current TPM Event Log provider files (ACPI and OF) for clarity. Signed-off-by: Thiebaud Weksteen Reviewed-by: Jarkko Sakkinen Reviewed-by: Javier Martinez Canillas Tested-by: Javier Martinez Canillas Tested-by: Jarkko Sakkinen Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen