name : asm_pointer_auth.h /* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_ASM_POINTER_AUTH_H #define __ASM_ASM_POINTER_AUTH_H #include <asm/alternative.h> #include <asm/asm-offsets.h> #include <asm/cpufeature.h> #include <asm/sysreg.h> #ifdef CONFIG_ARM64_PTR_AUTH_KERNEL .macro __ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 mov \tmp1, #THREAD_KEYS_KERNEL add \tmp1, \tsk, \tmp1 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APIA] msr_s SYS_APIAKEYLO_EL1, \tmp2 msr_s SYS_APIAKEYHI_EL1, \tmp3 .endm .macro ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 alternative_if ARM64_HAS_ADDRESS_AUTH __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 alternative_else_nop_endif .endm .macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3 alternative_if ARM64_HAS_ADDRESS_AUTH __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 isb alternative_else_nop_endif .endm #else /* CONFIG_ARM64_PTR_AUTH_KERNEL */ .macro __ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 .endm .macro ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 .endm .macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3 .endm #endif /* CONFIG_ARM64_PTR_AUTH_KERNEL */ #ifdef CONFIG_ARM64_PTR_AUTH /* * thread.keys_user.ap* as offset exceeds the #imm offset range * so use the base value of ldp as thread.keys_user and offset as * thread.keys_user.ap*. */ .macro __ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3 mov \tmp1, #THREAD_KEYS_USER add \tmp1, \tsk, \tmp1 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APIA] msr_s SYS_APIAKEYLO_EL1, \tmp2 msr_s SYS_APIAKEYHI_EL1, \tmp3 .endm .macro __ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3 mrs \tmp1, id_aa64isar1_el1 ubfx \tmp1, \tmp1, #ID_AA64ISAR1_EL1_APA_SHIFT, #8 mrs_s \tmp2, SYS_ID_AA64ISAR2_EL1 ubfx \tmp2, \tmp2, #ID_AA64ISAR2_EL1_APA3_SHIFT, #4 orr \tmp1, \tmp1, \tmp2 cbz \tmp1, .Lno_addr_auth\@ mov_q \tmp1, (SCTLR_ELx_ENIA | SCTLR_ELx_ENIB | \ SCTLR_ELx_ENDA | SCTLR_ELx_ENDB) mrs \tmp2, sctlr_el1 orr \tmp2, \tmp2, \tmp1 msr sctlr_el1, \tmp2 __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 isb .Lno_addr_auth\@: .endm .macro ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3 alternative_if_not ARM64_HAS_ADDRESS_AUTH b .Lno_addr_auth\@ alternative_else_nop_endif __ptrauth_keys_init_cpu \tsk, \tmp1, \tmp2, \tmp3 .Lno_addr_auth\@: .endm #else /* !CONFIG_ARM64_PTR_AUTH */ .macro ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3 .endm #endif /* CONFIG_ARM64_PTR_AUTH */ #endif /* __ASM_ASM_POINTER_AUTH_H */