1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_ASM_POINTER_AUTH_H 3 #define __ASM_ASM_POINTER_AUTH_H 4 5 #include <asm/alternative.h> 6 #include <asm/asm-offsets.h> 7 #include <asm/cpufeature.h> 8 #include <asm/sysreg.h> 9 10 #ifdef CONFIG_ARM64_PTR_AUTH 11 /* 12 * thread.keys_user.ap* as offset exceeds the #imm offset range 13 * so use the base value of ldp as thread.keys_user and offset as 14 * thread.keys_user.ap*. 15 */ 16 .macro ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3 17 mov \tmp1, #THREAD_KEYS_USER 18 add \tmp1, \tsk, \tmp1 19 alternative_if_not ARM64_HAS_ADDRESS_AUTH 20 b .Laddr_auth_skip_\@ 21 alternative_else_nop_endif 22 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APIA] 23 msr_s SYS_APIAKEYLO_EL1, \tmp2 24 msr_s SYS_APIAKEYHI_EL1, \tmp3 25 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APIB] 26 msr_s SYS_APIBKEYLO_EL1, \tmp2 27 msr_s SYS_APIBKEYHI_EL1, \tmp3 28 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APDA] 29 msr_s SYS_APDAKEYLO_EL1, \tmp2 30 msr_s SYS_APDAKEYHI_EL1, \tmp3 31 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APDB] 32 msr_s SYS_APDBKEYLO_EL1, \tmp2 33 msr_s SYS_APDBKEYHI_EL1, \tmp3 34 .Laddr_auth_skip_\@: 35 alternative_if ARM64_HAS_GENERIC_AUTH 36 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APGA] 37 msr_s SYS_APGAKEYLO_EL1, \tmp2 38 msr_s SYS_APGAKEYHI_EL1, \tmp3 39 alternative_else_nop_endif 40 .endm 41 42 .macro __ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 43 mov \tmp1, #THREAD_KEYS_KERNEL 44 add \tmp1, \tsk, \tmp1 45 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APIA] 46 msr_s SYS_APIAKEYLO_EL1, \tmp2 47 msr_s SYS_APIAKEYHI_EL1, \tmp3 48 .endm 49 50 .macro ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 51 alternative_if ARM64_HAS_ADDRESS_AUTH 52 __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 53 alternative_else_nop_endif 54 .endm 55 56 .macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3 57 alternative_if ARM64_HAS_ADDRESS_AUTH 58 __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 59 isb 60 alternative_else_nop_endif 61 .endm 62 63 .macro __ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3 64 mrs \tmp1, id_aa64isar1_el1 65 ubfx \tmp1, \tmp1, #ID_AA64ISAR1_APA_SHIFT, #8 66 cbz \tmp1, .Lno_addr_auth\@ 67 mov_q \tmp1, (SCTLR_ELx_ENIA | SCTLR_ELx_ENIB | \ 68 SCTLR_ELx_ENDA | SCTLR_ELx_ENDB) 69 mrs \tmp2, sctlr_el1 70 orr \tmp2, \tmp2, \tmp1 71 msr sctlr_el1, \tmp2 72 __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 73 isb 74 .Lno_addr_auth\@: 75 .endm 76 77 .macro ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3 78 alternative_if_not ARM64_HAS_ADDRESS_AUTH 79 b .Lno_addr_auth\@ 80 alternative_else_nop_endif 81 __ptrauth_keys_init_cpu \tsk, \tmp1, \tmp2, \tmp3 82 .Lno_addr_auth\@: 83 .endm 84 85 #else /* CONFIG_ARM64_PTR_AUTH */ 86 87 .macro ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3 88 .endm 89 90 .macro ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 91 .endm 92 93 .macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3 94 .endm 95 96 #endif /* CONFIG_ARM64_PTR_AUTH */ 97 98 #endif /* __ASM_ASM_POINTER_AUTH_H */ 99