Hello!
At the moment, there is no single general approach to using secure monitor in U-Boot, there is only the smc_call() function, over which everyone builds their own add-ons. This patchset is designed to solve this problem by adding a new uclass - SM_UCLASS. This UCLASS export following generic API:
1. sm_call() - generic SMC call to the secure-monitor 2. sm_call_read() - retrieve data from secure-monitor 3. sm_call_write() - send data to secure-monitor
In the future, it is necessary to completely get rid of raw smc_call() calls, replacing them with the use of SM_UCLASS based drivers.
V2:
- Add SM UCLASS - Add SM sandbox driver - Add test for sandbox driver - Meson Secure Monitor driver now based on SM_UCLASS - Fix include order in arch/arm/mach-meson/sm.c
Also, during the discussion in V1 of this patchset, it was discussed to create MESON_SM_UCLASS, but I considered such a uclass to be too arch-specific. That's why I suggest SM_UCLASS, which is not so arch-specific: secure monitor can used for whole ARM devices, not only for Amlogic SoC's.
Alexey Romanov (8): drivers: introduce Secure Monitor uclass sandbox: add sandobx sm uclass driver sandbox: dts: add meson secure monitor node sandbox: add tests for UCLASS_SM sandbox: defconfig: enable CONFIG_SM option drivers: introduce Meson Secure Monitor driver arch: meson: sm: set correct order of the includes arch: meson: use secure monitor driver
MAINTAINERS | 1 + arch/arm/mach-meson/Kconfig | 1 + arch/arm/mach-meson/sm.c | 116 +++++++++++---------- arch/sandbox/dts/test.dts | 4 + configs/sandbox_defconfig | 1 + drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/sm/Kconfig | 9 ++ drivers/sm/Makefile | 5 + drivers/sm/meson-sm.c | 198 ++++++++++++++++++++++++++++++++++++ drivers/sm/sandbox-sm.c | 76 ++++++++++++++ drivers/sm/sm-uclass.c | 55 ++++++++++ include/dm/uclass-id.h | 1 + include/meson/sm.h | 19 ++++ include/sandbox-sm.h | 18 ++++ include/sm-uclass.h | 72 +++++++++++++ include/sm.h | 67 ++++++++++++ test/dm/Makefile | 1 + test/dm/sm.c | 65 ++++++++++++ 19 files changed, 656 insertions(+), 56 deletions(-) create mode 100644 drivers/sm/Kconfig create mode 100644 drivers/sm/Makefile create mode 100644 drivers/sm/meson-sm.c create mode 100644 drivers/sm/sandbox-sm.c create mode 100644 drivers/sm/sm-uclass.c create mode 100644 include/meson/sm.h create mode 100644 include/sandbox-sm.h create mode 100644 include/sm-uclass.h create mode 100644 include/sm.h create mode 100644 test/dm/sm.c