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-rw-r--r--arch/x86/include/asm/pgalloc.h27
-rw-r--r--arch/x86/mm/init_64.c24
-rw-r--r--include/asm-generic/5level-fixup.h1
-rw-r--r--include/asm-generic/pgtable-nop4d-hack.h1
-rw-r--r--include/asm-generic/pgtable-nop4d.h1
-rw-r--r--include/asm-generic/pgtable-nopud.h1
6 files changed, 43 insertions, 12 deletions
diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h
index ec7f43327033..1ea41aaef68b 100644
--- a/arch/x86/include/asm/pgalloc.h
+++ b/arch/x86/include/asm/pgalloc.h
@@ -80,6 +80,13 @@ static inline void pmd_populate_kernel(struct mm_struct *mm,
set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
}
+static inline void pmd_populate_kernel_safe(struct mm_struct *mm,
+ pmd_t *pmd, pte_t *pte)
+{
+ paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT);
+ set_pmd_safe(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
+}
+
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
struct page *pte)
{
@@ -132,6 +139,12 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));
}
+
+static inline void pud_populate_safe(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+{
+ paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
+ set_pud_safe(pud, __pud(_PAGE_TABLE | __pa(pmd)));
+}
#endif /* CONFIG_X86_PAE */
#if CONFIG_PGTABLE_LEVELS > 3
@@ -141,6 +154,12 @@ static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
set_p4d(p4d, __p4d(_PAGE_TABLE | __pa(pud)));
}
+static inline void p4d_populate_safe(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
+{
+ paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
+ set_p4d_safe(p4d, __p4d(_PAGE_TABLE | __pa(pud)));
+}
+
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
gfp_t gfp = GFP_KERNEL_ACCOUNT;
@@ -173,6 +192,14 @@ static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d)
set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(p4d)));
}
+static inline void pgd_populate_safe(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d)
+{
+ if (!pgtable_l5_enabled())
+ return;
+ paravirt_alloc_p4d(mm, __pa(p4d) >> PAGE_SHIFT);
+ set_pgd_safe(pgd, __pgd(_PAGE_TABLE | __pa(p4d)));
+}
+
static inline p4d_t *p4d_alloc_one(struct mm_struct *mm, unsigned long addr)
{
gfp_t gfp = GFP_KERNEL_ACCOUNT;
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 5fab264948c2..3e25ac2793ef 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -432,7 +432,7 @@ phys_pte_init(pte_t *pte_page, unsigned long paddr, unsigned long paddr_end,
E820_TYPE_RAM) &&
!e820__mapped_any(paddr & PAGE_MASK, paddr_next,
E820_TYPE_RESERVED_KERN))
- set_pte(pte, __pte(0));
+ set_pte_safe(pte, __pte(0));
continue;
}
@@ -452,7 +452,7 @@ phys_pte_init(pte_t *pte_page, unsigned long paddr, unsigned long paddr_end,
pr_info(" pte=%p addr=%lx pte=%016lx\n", pte, paddr,
pfn_pte(paddr >> PAGE_SHIFT, PAGE_KERNEL).pte);
pages++;
- set_pte(pte, pfn_pte(paddr >> PAGE_SHIFT, prot));
+ set_pte_safe(pte, pfn_pte(paddr >> PAGE_SHIFT, prot));
paddr_last = (paddr & PAGE_MASK) + PAGE_SIZE;
}
@@ -487,7 +487,7 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long paddr, unsigned long paddr_end,
E820_TYPE_RAM) &&
!e820__mapped_any(paddr & PMD_MASK, paddr_next,
E820_TYPE_RESERVED_KERN))
- set_pmd(pmd, __pmd(0));
+ set_pmd_safe(pmd, __pmd(0));
continue;
}
@@ -524,7 +524,7 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long paddr, unsigned long paddr_end,
if (page_size_mask & (1<<PG_LEVEL_2M)) {
pages++;
spin_lock(&init_mm.page_table_lock);
- set_pte((pte_t *)pmd,
+ set_pte_safe((pte_t *)pmd,
pfn_pte((paddr & PMD_MASK) >> PAGE_SHIFT,
__pgprot(pgprot_val(prot) | _PAGE_PSE)));
spin_unlock(&init_mm.page_table_lock);
@@ -536,7 +536,7 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long paddr, unsigned long paddr_end,
paddr_last = phys_pte_init(pte, paddr, paddr_end, new_prot);
spin_lock(&init_mm.page_table_lock);
- pmd_populate_kernel(&init_mm, pmd, pte);
+ pmd_populate_kernel_safe(&init_mm, pmd, pte);
spin_unlock(&init_mm.page_table_lock);
}
update_page_count(PG_LEVEL_2M, pages);
@@ -573,7 +573,7 @@ phys_pud_init(pud_t *pud_page, unsigned long paddr, unsigned long paddr_end,
E820_TYPE_RAM) &&
!e820__mapped_any(paddr & PUD_MASK, paddr_next,
E820_TYPE_RESERVED_KERN))
- set_pud(pud, __pud(0));
+ set_pud_safe(pud, __pud(0));
continue;
}
@@ -611,7 +611,7 @@ phys_pud_init(pud_t *pud_page, unsigned long paddr, unsigned long paddr_end,
if (page_size_mask & (1<<PG_LEVEL_1G)) {
pages++;
spin_lock(&init_mm.page_table_lock);
- set_pte((pte_t *)pud,
+ set_pte_safe((pte_t *)pud,
pfn_pte((paddr & PUD_MASK) >> PAGE_SHIFT,
PAGE_KERNEL_LARGE));
spin_unlock(&init_mm.page_table_lock);
@@ -624,7 +624,7 @@ phys_pud_init(pud_t *pud_page, unsigned long paddr, unsigned long paddr_end,
page_size_mask, prot);
spin_lock(&init_mm.page_table_lock);
- pud_populate(&init_mm, pud, pmd);
+ pud_populate_safe(&init_mm, pud, pmd);
spin_unlock(&init_mm.page_table_lock);
}
__flush_tlb_all();
@@ -659,7 +659,7 @@ phys_p4d_init(p4d_t *p4d_page, unsigned long paddr, unsigned long paddr_end,
E820_TYPE_RAM) &&
!e820__mapped_any(paddr & P4D_MASK, paddr_next,
E820_TYPE_RESERVED_KERN))
- set_p4d(p4d, __p4d(0));
+ set_p4d_safe(p4d, __p4d(0));
continue;
}
@@ -677,7 +677,7 @@ phys_p4d_init(p4d_t *p4d_page, unsigned long paddr, unsigned long paddr_end,
page_size_mask);
spin_lock(&init_mm.page_table_lock);
- p4d_populate(&init_mm, p4d, pud);
+ p4d_populate_safe(&init_mm, p4d, pud);
spin_unlock(&init_mm.page_table_lock);
}
__flush_tlb_all();
@@ -723,9 +723,9 @@ kernel_physical_mapping_init(unsigned long paddr_start,
spin_lock(&init_mm.page_table_lock);
if (pgtable_l5_enabled())
- pgd_populate(&init_mm, pgd, p4d);
+ pgd_populate_safe(&init_mm, pgd, p4d);
else
- p4d_populate(&init_mm, p4d_offset(pgd, vaddr), (pud_t *) p4d);
+ p4d_populate_safe(&init_mm, p4d_offset(pgd, vaddr), (pud_t *) p4d);
spin_unlock(&init_mm.page_table_lock);
pgd_changed = true;
}
diff --git a/include/asm-generic/5level-fixup.h b/include/asm-generic/5level-fixup.h
index 73474bb52344..bb6cb347018c 100644
--- a/include/asm-generic/5level-fixup.h
+++ b/include/asm-generic/5level-fixup.h
@@ -26,6 +26,7 @@
#define p4d_clear(p4d) pgd_clear(p4d)
#define p4d_val(p4d) pgd_val(p4d)
#define p4d_populate(mm, p4d, pud) pgd_populate(mm, p4d, pud)
+#define p4d_populate_safe(mm, p4d, pud) pgd_populate(mm, p4d, pud)
#define p4d_page(p4d) pgd_page(p4d)
#define p4d_page_vaddr(p4d) pgd_page_vaddr(p4d)
diff --git a/include/asm-generic/pgtable-nop4d-hack.h b/include/asm-generic/pgtable-nop4d-hack.h
index 1d6dd38c0e5e..829bdb0d6327 100644
--- a/include/asm-generic/pgtable-nop4d-hack.h
+++ b/include/asm-generic/pgtable-nop4d-hack.h
@@ -31,6 +31,7 @@ static inline void pgd_clear(pgd_t *pgd) { }
#define pud_ERROR(pud) (pgd_ERROR((pud).pgd))
#define pgd_populate(mm, pgd, pud) do { } while (0)
+#define pgd_populate_safe(mm, pgd, pud) do { } while (0)
/*
* (puds are folded into pgds so this doesn't get actually called,
* but the define is needed for a generic inline function.)
diff --git a/include/asm-generic/pgtable-nop4d.h b/include/asm-generic/pgtable-nop4d.h
index 04cb913797bc..aebab905e6cd 100644
--- a/include/asm-generic/pgtable-nop4d.h
+++ b/include/asm-generic/pgtable-nop4d.h
@@ -26,6 +26,7 @@ static inline void pgd_clear(pgd_t *pgd) { }
#define p4d_ERROR(p4d) (pgd_ERROR((p4d).pgd))
#define pgd_populate(mm, pgd, p4d) do { } while (0)
+#define pgd_populate_safe(mm, pgd, p4d) do { } while (0)
/*
* (p4ds are folded into pgds so this doesn't get actually called,
* but the define is needed for a generic inline function.)
diff --git a/include/asm-generic/pgtable-nopud.h b/include/asm-generic/pgtable-nopud.h
index 9bef475db6fe..c77a1d301155 100644
--- a/include/asm-generic/pgtable-nopud.h
+++ b/include/asm-generic/pgtable-nopud.h
@@ -35,6 +35,7 @@ static inline void p4d_clear(p4d_t *p4d) { }
#define pud_ERROR(pud) (p4d_ERROR((pud).p4d))
#define p4d_populate(mm, p4d, pud) do { } while (0)
+#define p4d_populate_safe(mm, p4d, pud) do { } while (0)
/*
* (puds are folded into p4ds so this doesn't get actually called,
* but the define is needed for a generic inline function.)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 13:52:50 +0100