From 32ce6179fb99544fa9d7348e4641ccdf6c1e6067 Mon Sep 17 00:00:00 2001 From: Bryan O'Donoghue Date: Tue, 13 Mar 2018 16:50:27 +0000 Subject: [PATCH] optee: Add lib entries for sharing OPTEE code across ports This patch adds code to lib to enable sharing of useful OPTEE code between board-ports and architectures. The code on lib/optee/optee.c comes from the TI omap2 port. Eventually the OMAP2 code will be patched to include the shared code. The intention here is to add more useful OPTEE specific code as more functionality gets added. Signed-off-by: Bryan O'Donoghue Cc: Harinarayan Bhatta Cc: Andrew F. Davis Cc: Tom Rini Cc: Kever Yang Cc: Philipp Tomsich Cc: Peng Fan Tested-by: Peng Fan --- include/tee/optee.h | 16 ++++++++++++++++ lib/Kconfig | 1 + lib/Makefile | 1 + lib/optee/Kconfig | 8 ++++++++ lib/optee/Makefile | 7 +++++++ lib/optee/optee.c | 31 +++++++++++++++++++++++++++++++ 6 files changed, 64 insertions(+) create mode 100644 lib/optee/Kconfig create mode 100644 lib/optee/Makefile create mode 100644 lib/optee/optee.c diff --git a/include/tee/optee.h b/include/tee/optee.h index 9ab0d08634..8943afb439 100644 --- a/include/tee/optee.h +++ b/include/tee/optee.h @@ -10,6 +10,8 @@ #ifndef _OPTEE_H #define _OPTEE_H +#include + #define OPTEE_MAGIC 0x4554504f #define OPTEE_VERSION 1 #define OPTEE_ARCH_ARM32 0 @@ -27,4 +29,18 @@ struct optee_header { uint32_t paged_size; }; +#if defined(CONFIG_OPTEE) +int optee_verify_image(struct optee_header *hdr, unsigned long tzdram_start, + unsigned long tzdram_len, unsigned long image_len); +#else +static inline int optee_verify_image(struct optee_header *hdr, + unsigned long tzdram_start, + unsigned long tzdram_len, + unsigned long image_len) +{ + return -EPERM; +} + +#endif + #endif /* _OPTEE_H */ diff --git a/lib/Kconfig b/lib/Kconfig index 4fd41c4282..a4029a67dd 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -310,5 +310,6 @@ endmenu source lib/efi/Kconfig source lib/efi_loader/Kconfig +source lib/optee/Kconfig endmenu diff --git a/lib/Makefile b/lib/Makefile index 0db41c19f3..35da5705a4 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_FIT) += libfdt/ obj-$(CONFIG_OF_LIVE) += of_live.o obj-$(CONFIG_CMD_DHRYSTONE) += dhry/ obj-$(CONFIG_ARCH_AT91) += at91/ +obj-$(CONFIG_OPTEE) += optee/ obj-$(CONFIG_AES) += aes.o obj-y += charset.o diff --git a/lib/optee/Kconfig b/lib/optee/Kconfig new file mode 100644 index 0000000000..2e406fe107 --- /dev/null +++ b/lib/optee/Kconfig @@ -0,0 +1,8 @@ +config OPTEE + bool "Support OPTEE images" + help + U-Boot can be configured to boot OPTEE images. + Selecting this option will enable shared OPTEE library code and + enable an OPTEE specific bootm command that will perform additional + OPTEE specific checks before booting an OPTEE image created with + mkimage. diff --git a/lib/optee/Makefile b/lib/optee/Makefile new file mode 100644 index 0000000000..03e832f349 --- /dev/null +++ b/lib/optee/Makefile @@ -0,0 +1,7 @@ +# +# (C) Copyright 2017 Linaro +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-$(CONFIG_OPTEE) += optee.o diff --git a/lib/optee/optee.c b/lib/optee/optee.c new file mode 100644 index 0000000000..2cc16d7c97 --- /dev/null +++ b/lib/optee/optee.c @@ -0,0 +1,31 @@ +/* + * Copyright (C) 2017 Linaro + * Bryan O'Donoghue + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include + +int optee_verify_image(struct optee_header *hdr, unsigned long tzdram_start, + unsigned long tzdram_len, unsigned long image_len) +{ + unsigned long tzdram_end = tzdram_start + tzdram_len; + uint32_t tee_file_size; + + tee_file_size = hdr->init_size + hdr->paged_size + + sizeof(struct optee_header); + + if (hdr->magic != OPTEE_MAGIC || + hdr->version != OPTEE_VERSION || + hdr->init_load_addr_hi > tzdram_end || + hdr->init_load_addr_lo < tzdram_start || + tee_file_size > tzdram_len || + tee_file_size != image_len || + (hdr->init_load_addr_lo + tee_file_size) > tzdram_end) { + return -EINVAL; + } + + return 0; +}