1CFG_LTC_OPTEE_THREAD ?= y 2# Size of emulated TrustZone protected SRAM, 448 kB. 3# Only applicable when paging is enabled. 4CFG_CORE_TZSRAM_EMUL_SIZE ?= 458752 5CFG_LPAE_ADDR_SPACE_SIZE ?= (1ull << 32) 6 7CFG_MMAP_REGIONS ?= 13 8CFG_RESERVED_VASPACE_SIZE ?= (1024 * 1024 * 10) 9 10ifeq ($(CFG_ARM64_core),y) 11CFG_KERN_LINKER_FORMAT ?= elf64-littleaarch64 12CFG_KERN_LINKER_ARCH ?= aarch64 13else 14ifeq ($(CFG_ARM32_core),y) 15CFG_KERN_LINKER_FORMAT ?= elf32-littlearm 16CFG_KERN_LINKER_ARCH ?= arm 17else 18$(error Error: CFG_ARM64_core or CFG_ARM32_core should be defined) 19endif 20endif 21 22ifeq ($(CFG_TA_FLOAT_SUPPORT),y) 23# Use hard-float for floating point support in user TAs instead of 24# soft-float 25CFG_WITH_VFP ?= y 26ifeq ($(CFG_ARM64_core),y) 27# AArch64 has no fallback to soft-float 28$(call force,CFG_WITH_VFP,y) 29endif 30ifeq ($(CFG_WITH_VFP),y) 31platform-hard-float-enabled := y 32endif 33endif 34 35# Adds protection against CVE-2017-5715 also know as Spectre 36# (https://spectreattack.com) 37# See also https://developer.arm.com/-/media/Files/pdf/Cache_Speculation_Side-channels.pdf 38# Variant 2 39CFG_CORE_WORKAROUND_SPECTRE_BP ?= y 40# Same as CFG_CORE_WORKAROUND_SPECTRE_BP but targeting exceptions from 41# secure EL0 instead of non-secure world. 42CFG_CORE_WORKAROUND_SPECTRE_BP_SEC ?= $(CFG_CORE_WORKAROUND_SPECTRE_BP) 43 44CFG_CORE_RWDATA_NOEXEC ?= y 45CFG_CORE_RODATA_NOEXEC ?= n 46ifeq ($(CFG_CORE_RODATA_NOEXEC),y) 47$(call force,CFG_CORE_RWDATA_NOEXEC,y) 48endif 49# 'y' to set the Alignment Check Enable bit in SCTLR/SCTLR_EL1, 'n' to clear it 50CFG_SCTLR_ALIGNMENT_CHECK ?= y 51 52ifeq ($(CFG_CORE_LARGE_PHYS_ADDR),y) 53$(call force,CFG_WITH_LPAE,y) 54endif 55 56# Unmaps all kernel mode code except the code needed to take exceptions 57# from user space and restore kernel mode mapping again. This gives more 58# strict control over what is accessible while in user mode. 59# Addresses CVE-2017-5715 (aka Meltdown) known to affect Arm Cortex-A75 60CFG_CORE_UNMAP_CORE_AT_EL0 ?= y 61 62ifeq ($(CFG_ARM32_core),y) 63# Configration directive related to ARMv7 optee boot arguments. 64# CFG_PAGEABLE_ADDR: if defined, forces pageable data physical address. 65# CFG_NS_ENTRY_ADDR: if defined, forces NS World physical entry address. 66# CFG_DT_ADDR: if defined, forces Device Tree data physical address. 67endif 68 69core-platform-cppflags += -I$(arch-dir)/include 70core-platform-subdirs += \ 71 $(addprefix $(arch-dir)/, kernel crypto mm tee pta) $(platform-dir) 72 73ifneq ($(CFG_WITH_ARM_TRUSTED_FW),y) 74core-platform-subdirs += $(arch-dir)/sm 75endif 76 77arm64-platform-cppflags += -DARM64=1 -D__LP64__=1 78arm32-platform-cppflags += -DARM32=1 -D__ILP32__=1 79 80platform-cflags-generic ?= -g -ffunction-sections -fdata-sections -pipe 81platform-aflags-generic ?= -g -pipe 82 83arm32-platform-cflags-no-hard-float ?= -mfloat-abi=soft 84arm32-platform-cflags-hard-float ?= -mfloat-abi=hard -funsafe-math-optimizations 85arm32-platform-cflags-generic ?= -mthumb -mthumb-interwork \ 86 -fno-short-enums -fno-common -mno-unaligned-access 87arm32-platform-aflags-no-hard-float ?= 88 89arm64-platform-cflags-no-hard-float ?= -mgeneral-regs-only 90arm64-platform-cflags-hard-float ?= 91arm64-platform-cflags-generic ?= -mstrict-align 92 93ifeq ($(DEBUG),1) 94platform-cflags-optimization ?= -O0 95else 96platform-cflags-optimization ?= -Os 97endif 98 99platform-cflags-debug-info ?= -g3 100platform-aflags-debug-info ?= 101 102core-platform-cflags += $(platform-cflags-optimization) 103core-platform-cflags += $(platform-cflags-generic) 104core-platform-cflags += $(platform-cflags-debug-info) 105 106core-platform-aflags += $(platform-aflags-generic) 107core-platform-aflags += $(platform-aflags-debug-info) 108 109ifeq ($(CFG_ARM64_core),y) 110arch-bits-core := 64 111core-platform-cppflags += $(arm64-platform-cppflags) 112core-platform-cflags += $(arm64-platform-cflags) 113core-platform-cflags += $(arm64-platform-cflags-generic) 114core-platform-cflags += $(arm64-platform-cflags-no-hard-float) 115core-platform-aflags += $(arm64-platform-aflags) 116else 117arch-bits-core := 32 118core-platform-cppflags += $(arm32-platform-cppflags) 119core-platform-cflags += $(arm32-platform-cflags) 120core-platform-cflags += $(arm32-platform-cflags-no-hard-float) 121ifeq ($(CFG_UNWIND),y) 122core-platform-cflags += -funwind-tables 123endif 124core-platform-cflags += $(arm32-platform-cflags-generic) 125core-platform-aflags += $(core_arm32-platform-aflags) 126core-platform-aflags += $(arm32-platform-aflags) 127endif 128 129ifneq ($(filter ta_arm32,$(ta-targets)),) 130# Variables for ta-target/sm "ta_arm32" 131CFG_ARM32_ta_arm32 := y 132arch-bits-ta_arm32 := 32 133ta_arm32-platform-cppflags += $(arm32-platform-cppflags) 134ta_arm32-platform-cflags += $(arm32-platform-cflags) 135ta_arm32-platform-cflags += $(platform-cflags-optimization) 136ta_arm32-platform-cflags += $(platform-cflags-debug-info) 137ta_arm32-platform-cflags += -fpie 138ta_arm32-platform-cflags += $(arm32-platform-cflags-generic) 139ifeq ($(platform-hard-float-enabled),y) 140ta_arm32-platform-cflags += $(arm32-platform-cflags-hard-float) 141else 142ta_arm32-platform-cflags += $(arm32-platform-cflags-no-hard-float) 143endif 144ifeq ($(CFG_UNWIND),y) 145ta_arm32-platform-cflags += -funwind-tables 146endif 147ta_arm32-platform-aflags += $(platform-aflags-generic) 148ta_arm32-platform-aflags += $(platform-aflags-debug-info) 149ta_arm32-platform-aflags += $(arm32-platform-aflags) 150 151ta-mk-file-export-vars-ta_arm32 += CFG_ARM32_ta_arm32 152ta-mk-file-export-vars-ta_arm32 += ta_arm32-platform-cppflags 153ta-mk-file-export-vars-ta_arm32 += ta_arm32-platform-cflags 154ta-mk-file-export-vars-ta_arm32 += ta_arm32-platform-aflags 155 156ta-mk-file-export-add-ta_arm32 += CROSS_COMPILE ?= arm-linux-gnueabihf-_nl_ 157ta-mk-file-export-add-ta_arm32 += CROSS_COMPILE32 ?= $$(CROSS_COMPILE)_nl_ 158ta-mk-file-export-add-ta_arm32 += CROSS_COMPILE_ta_arm32 ?= $$(CROSS_COMPILE32)_nl_ 159endif 160 161ifneq ($(filter ta_arm64,$(ta-targets)),) 162# Variables for ta-target/sm "ta_arm64" 163CFG_ARM64_ta_arm64 := y 164arch-bits-ta_arm64 := 64 165ta_arm64-platform-cppflags += $(arm64-platform-cppflags) 166ta_arm64-platform-cflags += $(arm64-platform-cflags) 167ta_arm64-platform-cflags += $(platform-cflags-optimization) 168ta_arm64-platform-cflags += $(platform-cflags-debug-info) 169ta_arm64-platform-cflags += -fpie 170ta_arm64-platform-cflags += $(arm64-platform-cflags-generic) 171ifeq ($(platform-hard-float-enabled),y) 172ta_arm64-platform-cflags += $(arm64-platform-cflags-hard-float) 173else 174ta_arm64-platform-cflags += $(arm64-platform-cflags-no-hard-float) 175endif 176ta_arm64-platform-aflags += $(platform-aflags-generic) 177ta_arm64-platform-aflags += $(platform-aflags-debug-info) 178ta_arm64-platform-aflags += $(arm64-platform-aflags) 179 180ta-mk-file-export-vars-ta_arm64 += CFG_ARM64_ta_arm64 181ta-mk-file-export-vars-ta_arm64 += ta_arm64-platform-cppflags 182ta-mk-file-export-vars-ta_arm64 += ta_arm64-platform-cflags 183ta-mk-file-export-vars-ta_arm64 += ta_arm64-platform-aflags 184 185ta-mk-file-export-add-ta_arm64 += CROSS_COMPILE64 ?= $$(CROSS_COMPILE)_nl_ 186ta-mk-file-export-add-ta_arm64 += CROSS_COMPILE_ta_arm64 ?= $$(CROSS_COMPILE64)_nl_ 187endif 188 189# Set cross compiler prefix for each submodule 190$(foreach sm, core $(ta-targets), $(eval CROSS_COMPILE_$(sm) ?= $(CROSS_COMPILE$(arch-bits-$(sm))))) 191