| 1 |
|
| 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_KERNEL
|
| 11 |
|
| 12 | .macro __ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3
|
| 13 | mov \tmp1, #THREAD_KEYS_KERNEL
|
| 14 | add \tmp1, \tsk, \tmp1
|
| 15 | ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APIA]
|
| 16 | msr_s SYS_APIAKEYLO_EL1, \tmp2
|
| 17 | msr_s SYS_APIAKEYHI_EL1, \tmp3
|
| 18 | .endm
|
| 19 |
|
| 20 | .macro ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3
|
| 21 | alternative_if ARM64_HAS_ADDRESS_AUTH
|
| 22 | __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3
|
| 23 | alternative_else_nop_endif
|
| 24 | .endm
|
| 25 |
|
| 26 | .macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3
|
| 27 | alternative_if ARM64_HAS_ADDRESS_AUTH
|
| 28 | __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3
|
| 29 | isb
|
| 30 | alternative_else_nop_endif
|
| 31 | .endm
|
| 32 |
|
| 33 | #else
|
| 34 |
|
| 35 | .macro __ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3
|
| 36 | .endm
|
| 37 |
|
| 38 | .macro ptrauth_keys_install_kernel_nosync tsk, tmp1, tmp2, tmp3
|
| 39 | .endm
|
| 40 |
|
| 41 | .macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3
|
| 42 | .endm
|
| 43 |
|
| 44 | #endif
|
| 45 |
|
| 46 | #ifdef CONFIG_ARM64_PTR_AUTH
|
| 47 | |
| 48 | * thread.keys_user.ap* as offset exceeds the #imm offset range
|
| 49 | * so use the base value of ldp as thread.keys_user and offset as
|
| 50 | * thread.keys_user.ap*.
|
| 51 |
|
| 52 | .macro __ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3
|
| 53 | mov \tmp1, #THREAD_KEYS_USER
|
| 54 | add \tmp1, \tsk, \tmp1
|
| 55 | ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_USER_KEY_APIA]
|
| 56 | msr_s SYS_APIAKEYLO_EL1, \tmp2
|
| 57 | msr_s SYS_APIAKEYHI_EL1, \tmp3
|
| 58 | .endm
|
| 59 |
|
| 60 | .macro __ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3
|
| 61 | mrs \tmp1, id_aa64isar1_el1
|
| 62 | ubfx \tmp1, \tmp1, #ID_AA64ISAR1_EL1_APA_SHIFT, #8
|
| 63 | mrs_s \tmp2, SYS_ID_AA64ISAR2_EL1
|
| 64 | ubfx \tmp2, \tmp2, #ID_AA64ISAR2_EL1_APA3_SHIFT, #4
|
| 65 | orr \tmp1, \tmp1, \tmp2
|
| 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
|
| 86 |
|
| 87 | .macro ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3
|
| 88 | .endm
|
| 89 |
|
| 90 | #endif
|
| 91 |
|
| 92 | #endif
|