/* 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__ */