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
16static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
17		unsigned long pkey)
18{
19#ifdef CONFIG_PPC_MEM_KEYS
20	return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
21#else
22	return ((prot & PROT_SAO) ? VM_SAO : 0);
23#endif
24}
25#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
26
27static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
28{
29#ifdef CONFIG_PPC_MEM_KEYS
30	return (vm_flags & VM_SAO) ?
31		__pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) :
32		__pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags));
33#else
34	return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
35#endif
36}
37#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
38
39static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
40{
41	if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
42		return false;
43	if (prot & PROT_SAO) {
44		if (!cpu_has_feature(CPU_FTR_SAO))
45			return false;
46		if (firmware_has_feature(FW_FEATURE_LPAR) &&
47		    !IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR))
48			return false;
49	}
50	return true;
51}
52#define arch_validate_prot arch_validate_prot
53
54#endif /* CONFIG_PPC64 */
55#endif	/* _ASM_POWERPC_MMAN_H */
56