From 389711b374939968d2d0adede01b9e1f3bb4f531 Mon Sep 17 00:00:00 2001 From: Marek Behún Date: Thu, 22 Aug 2019 03:43:17 +0200 Subject: firmware: Add Turris Mox rWTM firmware driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This adds a driver to communicate with the firmware running on the secure processor of the Turris Mox router, enabling the kernel to retrieve true random numbers from the Entropy Bit Generator and to read some information burned into eFuses when device was manufactured: and to sign messages with the ECDSA private key burned into each Turris Mox device when manufacturing. This also adds support to read other information burned into eFuses: - serial number - board version - MAC addresses - RAM size - ECDSA public key (this is not read directly from eFuses, rather it is computed by the firmware as pair to the burned private key) The source code of the firmware is open source and can be found at https://gitlab.labs.nic.cz/turris/mox-boot-builder/tree/master/wtmi The firmware is also able to, on demand, sign messages with the burned ECDSA private key, but since Linux's akcipher API is not yet stable (and therefore not exposed to userspace via netlink), this functionality is not supported yet. Link: https://lore.kernel.org/r/20190822014318.19478-3-marek.behun@nic.cz Signed-off-by: Marek Behún Signed-off-by: Arnd Bergmann --- drivers/firmware/Kconfig | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'drivers/firmware/Kconfig') diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index 53446e39a32c..d2f466fdcd70 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -270,6 +270,20 @@ config TRUSTED_FOUNDATIONS Choose N if you don't know what this is about. +config TURRIS_MOX_RWTM + tristate "Turris Mox rWTM secure firmware driver" + depends on ARCH_MVEBU || COMPILE_TEST + depends on HAS_DMA && OF + depends on MAILBOX + select HW_RANDOM + select ARMADA_37XX_RWTM_MBOX + help + This driver communicates with the firmware on the Cortex-M3 secure + processor of the Turris Mox router. Enable if you are building for + Turris Mox, and you will be able to read the device serial number and + other manufacturing data and also utilize the Entropy Bit Generator + for hardware random number generation. + config HAVE_ARM_SMCCC bool -- cgit v1.2.3