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- /* 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 */
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