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
21alternative_if ARM64_HAS_ADDRESS_AUTH
22 __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3
23alternative_else_nop_endif
24 .endm
25
26 .macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3
27alternative_if ARM64_HAS_ADDRESS_AUTH
28 __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3
29 isb
30alternative_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
49
50
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_APA_SHIFT, #8
63 cbz \tmp1, .Lno_addr_auth\@
64 mov_q \tmp1, (SCTLR_ELx_ENIA | SCTLR_ELx_ENIB | \
65 SCTLR_ELx_ENDA | SCTLR_ELx_ENDB)
66 mrs \tmp2, sctlr_el1
67 orr \tmp2, \tmp2, \tmp1
68 msr sctlr_el1, \tmp2
69 __ptrauth_keys_install_kernel_nosync \tsk, \tmp1, \tmp2, \tmp3
70 isb
71.Lno_addr_auth\@:
72 .endm
73
74 .macro ptrauth_keys_init_cpu tsk, tmp1, tmp2, tmp3
75alternative_if_not ARM64_HAS_ADDRESS_AUTH
76 b .Lno_addr_auth\@
77alternative_else_nop_endif
78 __ptrauth_keys_init_cpu \tsk, \tmp1, \tmp2, \tmp3
79.Lno_addr_auth\@:
80 .endm
81
82#else
83
84 .macro ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3
85 .endm
86
87#endif
88
89#endif
90