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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __SPARC_MMAN_H__
3#define __SPARC_MMAN_H__
4
5#include <uapi/asm/mman.h>
6
7#ifndef __ASSEMBLY__
8#define arch_mmap_check(addr,len,flags) sparc_mmap_check(addr,len)
9int sparc_mmap_check(unsigned long addr, unsigned long len);
10
11#ifdef CONFIG_SPARC64
12#include <asm/adi_64.h>
13
14static inline void ipi_set_tstate_mcde(void *arg)
15{
16 struct mm_struct *mm = arg;
17
18 /* Set TSTATE_MCDE for the task using address map that ADI has been
19 * enabled on if the task is running. If not, it will be set
20 * automatically at the next context switch
21 */
22 if (current->mm == mm) {
23 struct pt_regs *regs;
24
25 regs = task_pt_regs(current);
26 regs->tstate |= TSTATE_MCDE;
27 }
28}
29
30#define arch_calc_vm_prot_bits(prot, pkey) sparc_calc_vm_prot_bits(prot)
31static inline unsigned long sparc_calc_vm_prot_bits(unsigned long prot)
32{
33 if (adi_capable() && (prot & PROT_ADI)) {
34 struct pt_regs *regs;
35
36 if (!current->mm->context.adi) {
37 regs = task_pt_regs(current);
38 regs->tstate |= TSTATE_MCDE;
39 current->mm->context.adi = true;
40 on_each_cpu_mask(mm_cpumask(current->mm),
41 ipi_set_tstate_mcde, current->mm, 0);
42 }
43 return VM_SPARC_ADI;
44 } else {
45 return 0;
46 }
47}
48
49#define arch_vm_get_page_prot(vm_flags) sparc_vm_get_page_prot(vm_flags)
50static inline pgprot_t sparc_vm_get_page_prot(unsigned long vm_flags)
51{
52 return (vm_flags & VM_SPARC_ADI) ? __pgprot(_PAGE_MCD_4V) : __pgprot(0);
53}
54
55#define arch_validate_prot(prot, addr) sparc_validate_prot(prot, addr)
56static inline int sparc_validate_prot(unsigned long prot, unsigned long addr)
57{
58 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_ADI))
59 return 0;
60 if (prot & PROT_ADI) {
61 if (!adi_capable())
62 return 0;
63
64 if (addr) {
65 struct vm_area_struct *vma;
66
67 vma = find_vma(current->mm, addr);
68 if (vma) {
69 /* ADI can not be enabled on PFN
70 * mapped pages
71 */
72 if (vma->vm_flags & (VM_PFNMAP | VM_MIXEDMAP))
73 return 0;
74
75 /* Mergeable pages can become unmergeable
76 * if ADI is enabled on them even if they
77 * have identical data on them. This can be
78 * because ADI enabled pages with identical
79 * data may still not have identical ADI
80 * tags on them. Disallow ADI on mergeable
81 * pages.
82 */
83 if (vma->vm_flags & VM_MERGEABLE)
84 return 0;
85 }
86 }
87 }
88 return 1;
89}
90#endif /* CONFIG_SPARC64 */
91
92#endif /* __ASSEMBLY__ */
93#endif /* __SPARC_MMAN_H__ */
1#ifndef __SPARC_MMAN_H__
2#define __SPARC_MMAN_H__
3
4#include <asm-generic/mman-common.h>
5
6/* SunOS'ified... */
7
8#define MAP_RENAME MAP_ANONYMOUS /* In SunOS terminology */
9#define MAP_NORESERVE 0x40 /* don't reserve swap pages */
10#define MAP_INHERIT 0x80 /* SunOS doesn't do this, but... */
11#define MAP_LOCKED 0x100 /* lock the mapping */
12#define _MAP_NEW 0x80000000 /* Binary compatibility is fun... */
13
14#define MAP_GROWSDOWN 0x0200 /* stack-like segment */
15#define MAP_DENYWRITE 0x0800 /* ETXTBSY */
16#define MAP_EXECUTABLE 0x1000 /* mark it as an executable */
17
18#define MCL_CURRENT 0x2000 /* lock all currently mapped pages */
19#define MCL_FUTURE 0x4000 /* lock all additions to address space */
20
21#define MAP_POPULATE 0x8000 /* populate (prefault) pagetables */
22#define MAP_NONBLOCK 0x10000 /* do not block on IO */
23#define MAP_STACK 0x20000 /* give out an address that is best suited for process/thread stacks */
24#define MAP_HUGETLB 0x40000 /* create a huge page mapping */
25
26#ifdef __KERNEL__
27#ifndef __ASSEMBLY__
28#define arch_mmap_check(addr,len,flags) sparc_mmap_check(addr,len)
29int sparc_mmap_check(unsigned long addr, unsigned long len);
30#endif
31#endif
32
33#endif /* __SPARC_MMAN_H__ */