Dynamic boost control is a feature of some SoCs that allows
an authenticated entity to send commands to the security processor
to control certain SOC characteristics with the intention to improve
performance.
This is implemented via a mechanism that a userspace application would
authenticate using a nonce and key exchange over an IOCTL interface.
After authentication is complete an application can exchange signed
messages with the security processor and both ends can validate the
data transmitted.
This mechanism and key exchange process also reflects how the interface
works on other operating systems as well.
This series includes a test suite that can be run on real hardware
to ensure that the communication works as expected. This can also be
used for an application to model the communication path.
Two sysfs files are introduced for reading the PSP bootloader version
as well as TEE version which can be useful data points for debugging
communication problems.
v1->v2:
* Commit message changes
* Minor changes for sysfs file commenting and mask handling
Mario Limonciello (10):
crypto: ccp: Rename macro for security attributes
crypto: ccp: Add support for displaying PSP firmware versions
crypto: ccp: Add bootloader and TEE version offsets
crypto: ccp: move setting PSP master to earlier in the init
crypto: ccp: Add support for fetching a nonce for dynamic boost
control
crypto: ccp: Add support for setting user ID for dynamic boost control
crypto: ccp: Add support for getting and setting DBC parameters
crypto: ccp: Add a sample script for Dynamic Boost Control
crypto: ccp: Add unit tests for dynamic boost control
crypto: ccp: Add Mario to MAINTAINERS
Documentation/ABI/testing/sysfs-driver-ccp | 18 ++
MAINTAINERS | 11 +
drivers/crypto/ccp/Makefile | 3 +-
drivers/crypto/ccp/dbc.c | 250 +++++++++++++++++++
drivers/crypto/ccp/dbc.h | 56 +++++
drivers/crypto/ccp/psp-dev.c | 16 +-
drivers/crypto/ccp/psp-dev.h | 1 +
drivers/crypto/ccp/sp-dev.h | 7 +
drivers/crypto/ccp/sp-pci.c | 96 +++++++-
include/linux/psp-platform-access.h | 4 +
include/uapi/linux/psp-dbc.h | 147 ++++++++++++
tools/crypto/ccp/.gitignore | 1 +
tools/crypto/ccp/dbc.py | 98 ++++++++
tools/crypto/ccp/dbc_cli.py | 123 ++++++++++
tools/crypto/ccp/test_dbc.py | 266 +++++++++++++++++++++
15 files changed, 1080 insertions(+), 17 deletions(-)
create mode 100644 drivers/crypto/ccp/dbc.c
create mode 100644 drivers/crypto/ccp/dbc.h
create mode 100644 include/uapi/linux/psp-dbc.h
create mode 100644 tools/crypto/ccp/.gitignore
create mode 100644 tools/crypto/ccp/dbc.py
create mode 100755 tools/crypto/ccp/dbc_cli.py
create mode 100755 tools/crypto/ccp/test_dbc.py
base-commit: 482c84e906e535072c55395acabd3a58e9443d12
--
2.34.1
