/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_MMAN_H__ #define __ASM_MMAN_H__ #include <linux/compiler.h> #include <linux/types.h> #include <uapi/asm/mman.h> static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot, unsigned long pkey __always_unused) { if (system_supports_bti() && (prot & PROT_BTI)) return VM_ARM64_BTI; return 0; } #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey) static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags) { return (vm_flags & VM_ARM64_BTI) ? __pgprot(PTE_GP) : __pgprot(0); } #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags) static inline bool arch_validate_prot(unsigned long prot, unsigned long addr __always_unused) { unsigned long supported = PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM; if (system_supports_bti()) supported |= PROT_BTI; return (prot & ~supported) == 0; } #define arch_validate_prot(prot, addr) arch_validate_prot(prot, addr) #endif /* ! __ASM_MMAN_H__ */