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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_COMPILER_H
#define __ASM_COMPILER_H
#if defined(CONFIG_ARM64_PTR_AUTH)
/*
* The EL0/EL1 pointer bits used by a pointer authentication code.
* This is dependent on TBI0/TBI1 being enabled, or bits 63:56 would also apply.
*/
#define ptrauth_user_pac_mask() GENMASK_ULL(54, vabits_actual)
#define ptrauth_kernel_pac_mask() GENMASK_ULL(63, vabits_actual)
/* Valid for EL0 TTBR0 and EL1 TTBR1 instruction pointers */
#define ptrauth_clear_pac(ptr) \
((ptr & BIT_ULL(55)) ? (ptr | ptrauth_kernel_pac_mask()) : \
(ptr & ~ptrauth_user_pac_mask()))
#define __builtin_return_address(val) \
(void *)(ptrauth_clear_pac((unsigned long)__builtin_return_address(val)))
#endif /* CONFIG_ARM64_PTR_AUTH */
#endif /* __ASM_COMPILER_H */
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