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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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/*
17 * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
18 * here. How important is the optimization?
19 */
20static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
21 unsigned long pkey)
22{
23#ifdef CONFIG_PPC_MEM_KEYS
24 return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
25#else
26 return ((prot & PROT_SAO) ? VM_SAO : 0);
27#endif
28}
29#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
30
31static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
32{
33#ifdef CONFIG_PPC_MEM_KEYS
34 return (vm_flags & VM_SAO) ?
35 __pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) :
36 __pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags));
37#else
38 return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
39#endif
40}
41#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
42
43static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
44{
45 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
46 return false;
47 if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
48 return false;
49 return true;
50}
51#define arch_validate_prot arch_validate_prot
52
53#endif /* CONFIG_PPC64 */
54#endif /* _ASM_POWERPC_MMAN_H */