1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (c) 2023 Huawei Device Co., Ltd. 4 * 5 * Pointer authentication keys initialisation. 6 */ 7 8 #ifndef __ASM_POINTER_AUTH_KEY_H 9 #define __ASM_POINTER_AUTH_KEY_H 10 11 #include <asm/alternative.h> 12 #include <asm/asm-offsets.h> 13 #include <asm/cpucaps.h> 14 #include <asm/sysreg.h> 15 16 .macro __ptrauth_address_keys_install_kernel tmp1, tmp2, tmp3 17 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APIB] 18 msr_s SYS_APIBKEYLO_EL1, \tmp2 19 msr_s SYS_APIBKEYHI_EL1, \tmp3 20 21 adr_l \tmp1, kernel_common_keys 22 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APIA] 23 msr_s SYS_APIAKEYLO_EL1, \tmp2 24 msr_s SYS_APIAKEYHI_EL1, \tmp3 25 26 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APDA] 27 msr_s SYS_APDAKEYLO_EL1, \tmp2 28 msr_s SYS_APDAKEYHI_EL1, \tmp3 29 30 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APDB] 31 msr_s SYS_APDBKEYLO_EL1, \tmp2 32 msr_s SYS_APDBKEYHI_EL1, \tmp3 33 .endm 34 35 .macro __ptrauth_generic_key_install_kernel tmp1, tmp2, tmp3 36 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APGA] 37 msr_s SYS_APGAKEYLO_EL1, \tmp2 38 msr_s SYS_APGAKEYHI_EL1, \tmp3 39 .endm 40 41 .macro ptrauth_keys_install_kernel_all tsk, tmp1, tmp2, tmp3 42 mov \tmp1, #THREAD_KEYS_KERNEL 43 add \tmp1, \tsk, \tmp1 44 45 alternative_if_not ARM64_HAS_ADDRESS_AUTH 46 b .Lno_addr_auth\@ 47 alternative_else_nop_endif 48 __ptrauth_address_keys_install_kernel \tmp1, \tmp2, \tmp3 49 50 .Lno_addr_auth\@: 51 alternative_if ARM64_HAS_GENERIC_AUTH 52 __ptrauth_generic_key_install_kernel \tmp1, \tmp2, \tmp3 53 alternative_else_nop_endif 54 isb 55 .endm 56 57 .macro __ptrauth_keys_install_kernel_all tsk, tmp1, tmp2, tmp3 58 mov \tmp1, #THREAD_KEYS_KERNEL 59 add \tmp1, \tsk, \tmp1 60 __ptrauth_address_keys_install_kernel \tmp1, \tmp2, \tmp3 61 __ptrauth_generic_key_install_kernel \tmp1, \tmp2, \tmp3 62 .endm 63 64 #endif 65