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98 lines
2.8 KiB
98 lines
2.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __ASM_ASM_POINTER_AUTH_H |
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#define __ASM_ASM_POINTER_AUTH_H |
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#include <asm/alternative.h> |
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#include <asm/asm-offsets.h> |
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#include <asm/cpufeature.h> |
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#include <asm/sysreg.h> |
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#ifdef CONFIG_ARM64_PTR_AUTH |
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/* |
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* thread.keys_user.ap* as offset exceeds the #imm offset range |
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* so use the base value of ldp as thread.keys_user and offset as |
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* thread.keys_user.ap*. |
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*/ |
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.macro ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3 |
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mov \tmp1, #THREAD_KEYS_USER |
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add \tmp1, \tsk, \tmp1 |
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alternative_if_not ARM64_HAS_ADDRESS_AUTH |
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b .Laddr_auth_skip_\@ |
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alternative_else_nop_endif |
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ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APIA] |
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msr_s SYS_APIAKEYLO_EL1, \tmp2 |
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msr_s SYS_APIAKEYHI_EL1, \tmp3 |
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ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APIB] |
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msr_s SYS_APIBKEYLO_EL1, \tmp2 |
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msr_s SYS_APIBKEYHI_EL1, \tmp3 |
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ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APDA] |
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msr_s SYS_APDAKEYLO_EL1, \tmp2 |
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msr_s SYS_APDAKEYHI_EL1, \tmp3 |
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ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APDB] |
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msr_s SYS_APDBKEYLO_EL1, \tmp2 |
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msr_s SYS_APDBKEYHI_EL1, \tmp3 |
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.Laddr_auth_skip_\@: |
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alternative_if ARM64_HAS_GENERIC_AUTH |
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ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APGA] |
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msr_s SYS_APGAKEYLO_EL1, \tmp2 |
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msr_s SYS_APGAKEYHI_EL1, \tmp3 |
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alternative_else_nop_endif |
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.endm |
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.macro __ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 |
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mov \tmp1, #THREAD_KEYS_KERNEL |
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add \tmp1, \tsk, \tmp1 |
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ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APIA] |
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msr_s SYS_APIAKEYLO_EL1, \tmp2 |
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msr_s SYS_APIAKEYHI_EL1, \tmp3 |
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.endm |
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.macro ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 |
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alternative_if ARM64_HAS_ADDRESS_AUTH |
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__ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 |
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alternative_else_nop_endif |
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.endm |
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.macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3 |
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alternative_if ARM64_HAS_ADDRESS_AUTH |
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__ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 |
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isb |
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alternative_else_nop_endif |
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.endm |
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.macro __ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3 |
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mrs \tmp1, id_aa64isar1_el1 |
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ubfx \tmp1, \tmp1, #ID_AA64ISAR1_APA_SHIFT, #8 |
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cbz \tmp1, .Lno_addr_auth\@ |
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mov_q \tmp1, (SCTLR_ELx_ENIA | SCTLR_ELx_ENIB | \ |
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SCTLR_ELx_ENDA | SCTLR_ELx_ENDB) |
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mrs \tmp2, sctlr_el1 |
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orr \tmp2, \tmp2, \tmp1 |
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msr sctlr_el1, \tmp2 |
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__ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3 |
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isb |
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.Lno_addr_auth\@: |
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.endm |
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.macro ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3 |
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alternative_if_not ARM64_HAS_ADDRESS_AUTH |
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b .Lno_addr_auth\@ |
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alternative_else_nop_endif |
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__ptrauth_keys_init_cpu \tsk, \tmp1, \tmp2, \tmp3 |
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.Lno_addr_auth\@: |
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.endm |
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#else /* CONFIG_ARM64_PTR_AUTH */ |
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.macro ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3 |
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.endm |
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.macro ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3 |
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.endm |
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.macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3 |
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.endm |
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#endif /* CONFIG_ARM64_PTR_AUTH */ |
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#endif /* __ASM_ASM_POINTER_AUTH_H */
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