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-rw-r--r--arch/arm64/include/asm/pgtable.h48
1 files changed, 25 insertions, 23 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 27c78395ae76..b524dcd17243 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -28,7 +28,7 @@
28#define PTE_FILE (_AT(pteval_t, 1) << 2) /* only when !pte_present() */ 28#define PTE_FILE (_AT(pteval_t, 1) << 2) /* only when !pte_present() */
29#define PTE_DIRTY (_AT(pteval_t, 1) << 55) 29#define PTE_DIRTY (_AT(pteval_t, 1) << 55)
30#define PTE_SPECIAL (_AT(pteval_t, 1) << 56) 30#define PTE_SPECIAL (_AT(pteval_t, 1) << 56)
31 /* bit 57 for PMD_SECT_SPLITTING */ 31#define PTE_WRITE (_AT(pteval_t, 1) << 57)
32#define PTE_PROT_NONE (_AT(pteval_t, 1) << 58) /* only when !PTE_VALID */ 32#define PTE_PROT_NONE (_AT(pteval_t, 1) << 58) /* only when !PTE_VALID */
33 33
34/* 34/*
@@ -67,15 +67,15 @@ extern pgprot_t pgprot_default;
67 67
68#define _MOD_PROT(p, b) __pgprot_modify(p, 0, b) 68#define _MOD_PROT(p, b) __pgprot_modify(p, 0, b)
69 69
70#define PAGE_NONE __pgprot_modify(pgprot_default, PTE_TYPE_MASK, PTE_PROT_NONE | PTE_RDONLY | PTE_PXN | PTE_UXN) 70#define PAGE_NONE __pgprot_modify(pgprot_default, PTE_TYPE_MASK, PTE_PROT_NONE | PTE_PXN | PTE_UXN)
71#define PAGE_SHARED _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN) 71#define PAGE_SHARED _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_WRITE)
72#define PAGE_SHARED_EXEC _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN) 72#define PAGE_SHARED_EXEC _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_WRITE)
73#define PAGE_COPY _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY) 73#define PAGE_COPY _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN)
74#define PAGE_COPY_EXEC _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY) 74#define PAGE_COPY_EXEC _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN)
75#define PAGE_READONLY _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY) 75#define PAGE_READONLY _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_UXN)
76#define PAGE_READONLY_EXEC _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY) 76#define PAGE_READONLY_EXEC _MOD_PROT(pgprot_default, PTE_USER | PTE_NG | PTE_PXN)
77#define PAGE_KERNEL _MOD_PROT(pgprot_default, PTE_PXN | PTE_UXN | PTE_DIRTY) 77#define PAGE_KERNEL _MOD_PROT(pgprot_default, PTE_PXN | PTE_UXN | PTE_DIRTY | PTE_WRITE)
78#define PAGE_KERNEL_EXEC _MOD_PROT(pgprot_default, PTE_UXN | PTE_DIRTY) 78#define PAGE_KERNEL_EXEC _MOD_PROT(pgprot_default, PTE_UXN | PTE_DIRTY | PTE_WRITE)
79 79
80#define PAGE_HYP _MOD_PROT(pgprot_default, PTE_HYP) 80#define PAGE_HYP _MOD_PROT(pgprot_default, PTE_HYP)
81#define PAGE_HYP_DEVICE __pgprot(PROT_DEVICE_nGnRE | PTE_HYP) 81#define PAGE_HYP_DEVICE __pgprot(PROT_DEVICE_nGnRE | PTE_HYP)
@@ -83,13 +83,13 @@ extern pgprot_t pgprot_default;
83#define PAGE_S2 __pgprot_modify(pgprot_default, PTE_S2_MEMATTR_MASK, PTE_S2_MEMATTR(MT_S2_NORMAL) | PTE_S2_RDONLY) 83#define PAGE_S2 __pgprot_modify(pgprot_default, PTE_S2_MEMATTR_MASK, PTE_S2_MEMATTR(MT_S2_NORMAL) | PTE_S2_RDONLY)
84#define PAGE_S2_DEVICE __pgprot(PROT_DEFAULT | PTE_S2_MEMATTR(MT_S2_DEVICE_nGnRE) | PTE_S2_RDWR | PTE_UXN) 84#define PAGE_S2_DEVICE __pgprot(PROT_DEFAULT | PTE_S2_MEMATTR(MT_S2_DEVICE_nGnRE) | PTE_S2_RDWR | PTE_UXN)
85 85
86#define __PAGE_NONE __pgprot(((_PAGE_DEFAULT) & ~PTE_TYPE_MASK) | PTE_PROT_NONE | PTE_RDONLY | PTE_PXN | PTE_UXN) 86#define __PAGE_NONE __pgprot(((_PAGE_DEFAULT) & ~PTE_TYPE_MASK) | PTE_PROT_NONE | PTE_PXN | PTE_UXN)
87#define __PAGE_SHARED __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN) 87#define __PAGE_SHARED __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_WRITE)
88#define __PAGE_SHARED_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN) 88#define __PAGE_SHARED_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_WRITE)
89#define __PAGE_COPY __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY) 89#define __PAGE_COPY __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN)
90#define __PAGE_COPY_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY) 90#define __PAGE_COPY_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN)
91#define __PAGE_READONLY __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_RDONLY) 91#define __PAGE_READONLY __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN)
92#define __PAGE_READONLY_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_RDONLY) 92#define __PAGE_READONLY_EXEC __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN)
93 93
94#endif /* __ASSEMBLY__ */ 94#endif /* __ASSEMBLY__ */
95 95
@@ -140,7 +140,7 @@ extern struct page *empty_zero_page;
140#define pte_dirty(pte) (pte_val(pte) & PTE_DIRTY) 140#define pte_dirty(pte) (pte_val(pte) & PTE_DIRTY)
141#define pte_young(pte) (pte_val(pte) & PTE_AF) 141#define pte_young(pte) (pte_val(pte) & PTE_AF)
142#define pte_special(pte) (pte_val(pte) & PTE_SPECIAL) 142#define pte_special(pte) (pte_val(pte) & PTE_SPECIAL)
143#define pte_write(pte) (!(pte_val(pte) & PTE_RDONLY)) 143#define pte_write(pte) (pte_val(pte) & PTE_WRITE)
144#define pte_exec(pte) (!(pte_val(pte) & PTE_UXN)) 144#define pte_exec(pte) (!(pte_val(pte) & PTE_UXN))
145 145
146#define pte_valid_user(pte) \ 146#define pte_valid_user(pte) \
@@ -148,13 +148,13 @@ extern struct page *empty_zero_page;
148 148
149static inline pte_t pte_wrprotect(pte_t pte) 149static inline pte_t pte_wrprotect(pte_t pte)
150{ 150{
151 pte_val(pte) |= PTE_RDONLY; 151 pte_val(pte) &= ~PTE_WRITE;
152 return pte; 152 return pte;
153} 153}
154 154
155static inline pte_t pte_mkwrite(pte_t pte) 155static inline pte_t pte_mkwrite(pte_t pte)
156{ 156{
157 pte_val(pte) &= ~PTE_RDONLY; 157 pte_val(pte) |= PTE_WRITE;
158 return pte; 158 return pte;
159} 159}
160 160
@@ -201,8 +201,10 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
201 if (pte_valid_user(pte)) { 201 if (pte_valid_user(pte)) {
202 if (pte_exec(pte)) 202 if (pte_exec(pte))
203 __sync_icache_dcache(pte, addr); 203 __sync_icache_dcache(pte, addr);
204 if (!pte_dirty(pte)) 204 if (pte_dirty(pte) && pte_write(pte))
205 pte = pte_wrprotect(pte); 205 pte_val(pte) &= ~PTE_RDONLY;
206 else
207 pte_val(pte) |= PTE_RDONLY;
206 } 208 }
207 209
208 set_pte(ptep, pte); 210 set_pte(ptep, pte);
@@ -376,7 +378,7 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
376static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) 378static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
377{ 379{
378 const pteval_t mask = PTE_USER | PTE_PXN | PTE_UXN | PTE_RDONLY | 380 const pteval_t mask = PTE_USER | PTE_PXN | PTE_UXN | PTE_RDONLY |
379 PTE_PROT_NONE | PTE_VALID; 381 PTE_PROT_NONE | PTE_VALID | PTE_WRITE;
380 pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask); 382 pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask);
381 return pte; 383 return pte;
382} 384}
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-01 08:34:16 -0500