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 tsk, sync, tmp1, tmp2, tmp3 43 alternative_if ARM64_HAS_ADDRESS_AUTH 44 mov \tmp1, #THREAD_KEYS_KERNEL 45 add \tmp1, \tsk, \tmp1 46 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APIA] 47 msr_s SYS_APIAKEYLO_EL1, \tmp2 48 msr_s SYS_APIAKEYHI_EL1, \tmp3 49 .if \sync == 1 50 isb 51 .endif 52 alternative_else_nop_endif 53 .endm 54 55 #else /* CONFIG_ARM64_PTR_AUTH */ 56 57 .macro ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3 58 .endm 59 60 .macro ptrauth_keys_install_kernel tsk, sync, tmp1, tmp2, tmp3 61 .endm 62 63 #endif /* CONFIG_ARM64_PTR_AUTH */ 64 65 #endif /* __ASM_ASM_POINTER_AUTH_H */ 66