From 7ae22d72781de76b3c23b018a3fccc172e9875de Mon Sep 17 00:00:00 2001 From: Patrick Delaunay Date: Wed, 12 Feb 2020 19:37:38 +0100 Subject: arm: stm32mp: bsec: add permanent lock support in bsec driver Add BSEC lock access (read / write) at 0xC0000000 offset of misc driver. The write access only available for Trusted boot mode, based on new SMC STM32_SMC_WRLOCK_OTP. With the fuse command, the permanent lock status is accessed with 0x10000000 offset (0xC0000000 - 0x8000000 for OTP sense/program divided by u32 size), for example: Read lock status of fuse 57 (0x39) STM32MP> fuse sense 0 0x10000039 1 Sensing bank 0: Word 0x10000039: 00000000 Set permanent lock of fuse 57 (0x39) STM32MP> fuse prog 0 0x10000039 1 Sensing bank 0: Word 0x10000039: 00000000 WARNING: the OTP lock is updated only after reboot WARING: Programming lock or fuses is an irreversible operation! This may brick your system. Signed-off-by: Patrick Delaunay Acked-by: Patrice Chotard --- arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h') diff --git a/arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h b/arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h index 8130546b27..7b9167c356 100644 --- a/arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h +++ b/arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h @@ -27,6 +27,7 @@ #define STM32_SMC_READ_OTP 0x04 #define STM32_SMC_READ_ALL 0x05 #define STM32_SMC_WRITE_ALL 0x06 +#define STM32_SMC_WRLOCK_OTP 0x07 /* SMC error codes */ #define STM32_SMC_OK 0x0 -- cgit From 718f7bf7ca31277fbe5fdf49b6fa897736b7f36d Mon Sep 17 00:00:00 2001 From: Patrick Delaunay Date: Wed, 12 Feb 2020 19:37:40 +0100 Subject: arm: stm32mp: improve the error message for smc Add the SMC code and operation for trace on errors. Signed-off-by: Patrick Delaunay Acked-by: Patrice Chotard --- arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h') diff --git a/arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h b/arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h index 7b9167c356..4ad14f963b 100644 --- a/arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h +++ b/arch/arm/mach-stm32mp/include/mach/stm32mp1_smc.h @@ -46,8 +46,8 @@ static inline u32 stm32_smc(u32 svc, u8 op, u32 data1, u32 data2, u32 *result) arm_smccc_smc(svc, op, data1, data2, 0, 0, 0, 0, &res); if (res.a0) { - pr_err("%s: Failed to exec in secure mode (err = %ld)\n", - __func__, res.a0); + pr_err("%s: Failed to exec svc=%x op=%x in secure mode (err = %ld)\n", + __func__, svc, op, res.a0); return -EINVAL; } if (result) -- cgit