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The arch policy is inherited from x86. Signed-off-by: Chester Lin --- arch/arm64/Kconfig | 1 + arch/arm64/kernel/Makefile | 2 ++ arch/arm64/kernel/ima_arch.c | 37 ++++++++++++++++++++++++++++++++++++ 3 files changed, 40 insertions(+) create mode 100644 arch/arm64/kernel/ima_arch.c diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 6d232837cbee..b5518e7b604d 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -196,6 +196,7 @@ config ARM64 select SWIOTLB select SYSCTL_EXCEPTION_TRACE select THREAD_INFO_IN_TASK + imply IMA_SECURE_AND_OR_TRUSTED_BOOT if EFI help ARM 64-bit (AArch64) Linux support. diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index a561cbb91d4d..0300ab60785d 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -71,3 +71,5 @@ extra-y += $(head-y) vmlinux.lds ifeq ($(CONFIG_DEBUG_EFI),y) AFLAGS_head.o += -DVMLINUX_PATH="\"$(realpath $(objtree)/vmlinux)\"" endif + +obj-$(CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT) += ima_arch.o diff --git a/arch/arm64/kernel/ima_arch.c b/arch/arm64/kernel/ima_arch.c new file mode 100644 index 000000000000..46f5641c3da5 --- /dev/null +++ b/arch/arm64/kernel/ima_arch.c @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2018 IBM Corporation + */ +#include +#include + +bool arch_ima_get_secureboot(void) +{ + if (efi_enabled(EFI_SECURE_BOOT)) + return true; + + return false; +} + +/* secureboot arch rules */ +static const char * const sb_arch_rules[] = { +#if !IS_ENABLED(CONFIG_KEXEC_SIG) + "appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig", +#endif /* CONFIG_KEXEC_SIG */ + "measure func=KEXEC_KERNEL_CHECK", +#if !IS_ENABLED(CONFIG_MODULE_SIG) + "appraise func=MODULE_CHECK appraise_type=imasig", +#endif + "measure func=MODULE_CHECK", + NULL +}; + +const char * const *arch_get_ima_policy(void) +{ + if (IS_ENABLED(CONFIG_IMA_ARCH_POLICY) && arch_ima_get_secureboot()) { + if (IS_ENABLED(CONFIG_MODULE_SIG)) + set_module_sig_enforced(); + return sb_arch_rules; + } + return NULL; +}