1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 */
4#ifndef _ASM_POWERPC_MMAN_H
5#define _ASM_POWERPC_MMAN_H
6
7#include <uapi/asm/mman.h>
8
9#ifdef CONFIG_PPC64
10
11#include <asm/cputable.h>
12#include <linux/mm.h>
13#include <linux/pkeys.h>
14#include <asm/cpu_has_feature.h>
15#include <asm/firmware.h>
16
17static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
18		unsigned long pkey)
19{
20#ifdef CONFIG_PPC_MEM_KEYS
21	return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
22#else
23	return ((prot & PROT_SAO) ? VM_SAO : 0);
24#endif
25}
26#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
27
28static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
29{
30	if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
31		return false;
32	if (prot & PROT_SAO) {
33		if (!cpu_has_feature(CPU_FTR_SAO))
34			return false;
35		if (firmware_has_feature(FW_FEATURE_LPAR) &&
36		    !IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR))
37			return false;
38	}
39	return true;
40}
41#define arch_validate_prot arch_validate_prot
42
43#endif /* CONFIG_PPC64 */
44#endif	/* _ASM_POWERPC_MMAN_H */
45