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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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