mman.h (d85ddd1318e66c0c2665dbfcbc21a8b66c9152aa) mman.h (12564485ed8caac3c18572793ec01330792c7191)
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
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
16#ifdef CONFIG_PPC_MEM_KEYS
17static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
18 unsigned long pkey)
19{
16static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
17 unsigned long pkey)
18{
20 return pkey_to_vmflag_bits(pkey);
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
21}
22#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
23
24static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
25{
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{
26 return __pgprot(vmflag_to_pte_pkey_bits(vm_flags));
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
27}
28#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
36}
37#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
29#endif
30
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) && !cpu_has_feature(CPU_FTR_SAO))
44 return false;
45 return true;
46}
47#define arch_validate_prot arch_validate_prot
48
31#endif /* CONFIG_PPC64 */
32#endif /* _ASM_POWERPC_MMAN_H */
49#endif /* CONFIG_PPC64 */
50#endif /* _ASM_POWERPC_MMAN_H */