tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License
4 * as published by the Free Software Foundation; either version
5 * 2 of the License, or (at your option) any later version.
6 */
7#ifndef _ASM_POWERPC_MMAN_H
8#define _ASM_POWERPC_MMAN_H
9
10#include <uapi/asm/mman.h>
11
12#ifdef CONFIG_PPC64
13
14#include <asm/cputable.h>
15#include <linux/mm.h>
16#include <asm/cpu_has_feature.h>
17
18/*
19 * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
20 * here. How important is the optimization?
21 */
22static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
23 unsigned long pkey)
24{
25 return (prot & PROT_SAO) ? VM_SAO : 0;
26}
27#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
28
29static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
30{
31 return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
32}
33#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
34
35static inline bool arch_validate_prot(unsigned long prot)
36{
37 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
38 return false;
39 if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
40 return false;
41 return true;
42}
43#define arch_validate_prot(prot) arch_validate_prot(prot)
44
45#endif /* CONFIG_PPC64 */
46#endif /* _ASM_POWERPC_MMAN_H */