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git.ipfire.org Git - thirdparty/linux.git/blob - arch/riscv/include/asm/pgalloc.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
4 * Copyright (C) 2012 Regents of the University of California
7 #ifndef _ASM_RISCV_PGALLOC_H
8 #define _ASM_RISCV_PGALLOC_H
14 #define __HAVE_ARCH_PUD_ALLOC_ONE
15 #define __HAVE_ARCH_PUD_FREE
16 #include <asm-generic/pgalloc.h>
18 static inline void pmd_populate_kernel(struct mm_struct
*mm
,
19 pmd_t
*pmd
, pte_t
*pte
)
21 unsigned long pfn
= virt_to_pfn(pte
);
23 set_pmd(pmd
, __pmd((pfn
<< _PAGE_PFN_SHIFT
) | _PAGE_TABLE
));
26 static inline void pmd_populate(struct mm_struct
*mm
,
27 pmd_t
*pmd
, pgtable_t pte
)
29 unsigned long pfn
= virt_to_pfn(page_address(pte
));
31 set_pmd(pmd
, __pmd((pfn
<< _PAGE_PFN_SHIFT
) | _PAGE_TABLE
));
34 #ifndef __PAGETABLE_PMD_FOLDED
35 static inline void pud_populate(struct mm_struct
*mm
, pud_t
*pud
, pmd_t
*pmd
)
37 unsigned long pfn
= virt_to_pfn(pmd
);
39 set_pud(pud
, __pud((pfn
<< _PAGE_PFN_SHIFT
) | _PAGE_TABLE
));
42 static inline void p4d_populate(struct mm_struct
*mm
, p4d_t
*p4d
, pud_t
*pud
)
44 if (pgtable_l4_enabled
) {
45 unsigned long pfn
= virt_to_pfn(pud
);
47 set_p4d(p4d
, __p4d((pfn
<< _PAGE_PFN_SHIFT
) | _PAGE_TABLE
));
51 static inline void p4d_populate_safe(struct mm_struct
*mm
, p4d_t
*p4d
,
54 if (pgtable_l4_enabled
) {
55 unsigned long pfn
= virt_to_pfn(pud
);
58 __p4d((pfn
<< _PAGE_PFN_SHIFT
) | _PAGE_TABLE
));
62 static inline void pgd_populate(struct mm_struct
*mm
, pgd_t
*pgd
, p4d_t
*p4d
)
64 if (pgtable_l5_enabled
) {
65 unsigned long pfn
= virt_to_pfn(p4d
);
67 set_pgd(pgd
, __pgd((pfn
<< _PAGE_PFN_SHIFT
) | _PAGE_TABLE
));
71 static inline void pgd_populate_safe(struct mm_struct
*mm
, pgd_t
*pgd
,
74 if (pgtable_l5_enabled
) {
75 unsigned long pfn
= virt_to_pfn(p4d
);
78 __pgd((pfn
<< _PAGE_PFN_SHIFT
) | _PAGE_TABLE
));
82 #define pud_alloc_one pud_alloc_one
83 static inline pud_t
*pud_alloc_one(struct mm_struct
*mm
, unsigned long addr
)
85 if (pgtable_l4_enabled
)
86 return __pud_alloc_one(mm
, addr
);
91 #define pud_free pud_free
92 static inline void pud_free(struct mm_struct
*mm
, pud_t
*pud
)
94 if (pgtable_l4_enabled
)
98 static inline void __pud_free_tlb(struct mmu_gather
*tlb
, pud_t
*pud
,
101 if (pgtable_l4_enabled
) {
102 struct ptdesc
*ptdesc
= virt_to_ptdesc(pud
);
104 pagetable_pud_dtor(ptdesc
);
105 if (riscv_use_ipi_for_rfence())
106 tlb_remove_page_ptdesc(tlb
, ptdesc
);
108 tlb_remove_ptdesc(tlb
, ptdesc
);
112 #define p4d_alloc_one p4d_alloc_one
113 static inline p4d_t
*p4d_alloc_one(struct mm_struct
*mm
, unsigned long addr
)
115 if (pgtable_l5_enabled
) {
116 gfp_t gfp
= GFP_PGTABLE_USER
;
119 gfp
= GFP_PGTABLE_KERNEL
;
120 return (p4d_t
*)get_zeroed_page(gfp
);
126 static inline void __p4d_free(struct mm_struct
*mm
, p4d_t
*p4d
)
128 BUG_ON((unsigned long)p4d
& (PAGE_SIZE
-1));
129 free_page((unsigned long)p4d
);
132 #define p4d_free p4d_free
133 static inline void p4d_free(struct mm_struct
*mm
, p4d_t
*p4d
)
135 if (pgtable_l5_enabled
)
139 static inline void __p4d_free_tlb(struct mmu_gather
*tlb
, p4d_t
*p4d
,
142 if (pgtable_l5_enabled
) {
143 if (riscv_use_ipi_for_rfence())
144 tlb_remove_page_ptdesc(tlb
, virt_to_ptdesc(p4d
));
146 tlb_remove_ptdesc(tlb
, virt_to_ptdesc(p4d
));
149 #endif /* __PAGETABLE_PMD_FOLDED */
151 static inline void sync_kernel_mappings(pgd_t
*pgd
)
153 memcpy(pgd
+ USER_PTRS_PER_PGD
,
154 init_mm
.pgd
+ USER_PTRS_PER_PGD
,
155 (PTRS_PER_PGD
- USER_PTRS_PER_PGD
) * sizeof(pgd_t
));
158 static inline pgd_t
*pgd_alloc(struct mm_struct
*mm
)
162 pgd
= (pgd_t
*)__get_free_page(GFP_KERNEL
);
163 if (likely(pgd
!= NULL
)) {
164 memset(pgd
, 0, USER_PTRS_PER_PGD
* sizeof(pgd_t
));
165 /* Copy kernel mappings */
166 sync_kernel_mappings(pgd
);
171 #ifndef __PAGETABLE_PMD_FOLDED
173 static inline void __pmd_free_tlb(struct mmu_gather
*tlb
, pmd_t
*pmd
,
176 struct ptdesc
*ptdesc
= virt_to_ptdesc(pmd
);
178 pagetable_pmd_dtor(ptdesc
);
179 if (riscv_use_ipi_for_rfence())
180 tlb_remove_page_ptdesc(tlb
, ptdesc
);
182 tlb_remove_ptdesc(tlb
, ptdesc
);
185 #endif /* __PAGETABLE_PMD_FOLDED */
187 static inline void __pte_free_tlb(struct mmu_gather
*tlb
, pgtable_t pte
,
190 struct ptdesc
*ptdesc
= page_ptdesc(pte
);
192 pagetable_pte_dtor(ptdesc
);
193 if (riscv_use_ipi_for_rfence())
194 tlb_remove_page_ptdesc(tlb
, ptdesc
);
196 tlb_remove_ptdesc(tlb
, ptdesc
);
198 #endif /* CONFIG_MMU */
200 #endif /* _ASM_RISCV_PGALLOC_H */