diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index beabb099c04000acf3de74871b875e2563423c4f..62e6ea0a7650a5230f3674be0924c5039e01dfbf 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -1350,5 +1350,26 @@ static inline bool is_pte_rw_upgrade(unsigned long old_val, unsigned long new_va
return false;
}
+/*
+ * Like pmd_huge() and pmd_large(), but works regardless of config options
+ */
+#define pmd_is_leaf pmd_is_leaf
+static inline bool pmd_is_leaf(pmd_t pmd)
+{
+ return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
+}
+
+#define pud_is_leaf pud_is_leaf
+static inline bool pud_is_leaf(pud_t pud)
+{
+ return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
+}
+
+#define pgd_is_leaf pgd_is_leaf
+static inline bool pgd_is_leaf(pgd_t pgd)
+{
+ return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE));
+}
+
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_BOOK3S_64_PGTABLE_H_ */
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index 3f53be60fb014928440ba5e3f5e7e9a985b9499e..bf7d771f342eea2a3e47cd68e950a198f78f8827 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -140,6 +140,30 @@ static inline void pte_frag_set(mm_context_t *ctx, void *p)
}
#endif
+#ifndef pmd_is_leaf
+#define pmd_is_leaf pmd_is_leaf
+static inline bool pmd_is_leaf(pmd_t pmd)
+{
+ return false;
+}
+#endif
+
+#ifndef pud_is_leaf
+#define pud_is_leaf pud_is_leaf
+static inline bool pud_is_leaf(pud_t pud)
+{
+ return false;
+}
+#endif
+
+#ifndef pgd_is_leaf
+#define pgd_is_leaf pgd_is_leaf
+static inline bool pgd_is_leaf(pgd_t pgd)
+{
+ return false;
+}
+#endif
+
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_PGTABLE_H */
diff --git a/arch/powerpc/include/asm/pte-walk.h b/arch/powerpc/include/asm/pte-walk.h
index 2d633e9d686c4f9d3b4ea39ebd160d93806467a7..33fa5dd8ee6a7d7e90f5ae0c087037c4098ce904 100644
--- a/arch/powerpc/include/asm/pte-walk.h
+++ b/arch/powerpc/include/asm/pte-walk.h
@@ -10,8 +10,20 @@ extern pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
static inline pte_t *find_linux_pte(pgd_t *pgdir, unsigned long ea,
bool *is_thp, unsigned *hshift)
{
+ pte_t *pte;
+
VM_WARN(!arch_irqs_disabled(), "%s called with irq enabled\n", __func__);
- return __find_linux_pte(pgdir, ea, is_thp, hshift);
+ pte = __find_linux_pte(pgdir, ea, is_thp, hshift);
+
+#if defined(CONFIG_DEBUG_VM) && \
+ !(defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE))
+ /*
+ * We should not find huge page if these configs are not enabled.
+ */
+ if (hshift)
+ WARN_ON(*hshift);
+#endif
+ return pte;
}
static inline pte_t *find_init_mm_pte(unsigned long ea, unsigned *hshift)
@@ -26,10 +38,22 @@ static inline pte_t *find_init_mm_pte(unsigned long ea, unsigned *hshift)
static inline pte_t *find_current_mm_pte(pgd_t *pgdir, unsigned long ea,
bool *is_thp, unsigned *hshift)
{
+ pte_t *pte;
+
VM_WARN(!arch_irqs_disabled(), "%s called with irq enabled\n", __func__);
VM_WARN(pgdir != current->mm->pgd,
"%s lock less page table lookup called on wrong mm\n", __func__);
- return __find_linux_pte(pgdir, ea, is_thp, hshift);
+ pte = __find_linux_pte(pgdir, ea, is_thp, hshift);
+
+#if defined(CONFIG_DEBUG_VM) && \
+ !(defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE))
+ /*
+ * We should not find huge page if these configs are not enabled.
+ */
+ if (hshift)
+ WARN_ON(*hshift);
+#endif
+ return pte;
}
#endif /* _ASM_POWERPC_PTE_WALK_H */
diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c
index f55ef071883f13166662ca006e10d314d70a135c..91efee7f0329a9753c0b6f835485187bc9643403 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_radix.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c
@@ -363,12 +363,6 @@ static void kvmppc_pte_free(pte_t *ptep)
kmem_cache_free(kvm_pte_cache, ptep);
}
-/* Like pmd_huge() and pmd_large(), but works regardless of config options */
-static inline int pmd_is_leaf(pmd_t pmd)
-{
- return !!(pmd_val(pmd) & _PAGE_PTE);
-}
-
static pmd_t *kvmppc_pmd_alloc(void)
{
return kmem_cache_alloc(kvm_pmd_cache, GFP_KERNEL);
@@ -489,7 +483,7 @@ static void kvmppc_unmap_free_pud(struct kvm *kvm, pud_t *pud,
for (iu = 0; iu < PTRS_PER_PUD; ++iu, ++p) {
if (!pud_present(*p))
continue;
- if (pud_huge(*p)) {
+ if (pud_is_leaf(*p)) {
pud_clear(p);
} else {
pmd_t *pmd;
@@ -588,7 +582,7 @@ int kvmppc_create_pte(struct kvm *kvm, pgd_t *pgtable, pte_t pte,
new_pud = pud_alloc_one(kvm->mm, gpa);
pmd = NULL;
- if (pud && pud_present(*pud) && !pud_huge(*pud))
+ if (pud && pud_present(*pud) && !pud_is_leaf(*pud))
pmd = pmd_offset(pud, gpa);
else if (level <= 1)
new_pmd = kvmppc_pmd_alloc();
@@ -611,7 +605,7 @@ int kvmppc_create_pte(struct kvm *kvm, pgd_t *pgtable, pte_t pte,
new_pud = NULL;
}
pud = pud_offset(pgd, gpa);
- if (pud_huge(*pud)) {
+ if (pud_is_leaf(*pud)) {
unsigned long hgpa = gpa & PUD_MASK;
/* Check if we raced and someone else has set the same thing */
diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index b573fa024b3291b2ce9a0184fdb5d6e980d7d1b0..e92c6472a20c0f634fbd0845d45811c780c429a6 100644
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -203,14 +203,14 @@ void radix__change_memory_range(unsigned long start, unsigned long end,
pudp = pud_alloc(&init_mm, pgdp, idx);
if (!pudp)
continue;
- if (pud_huge(*pudp)) {
+ if (pud_is_leaf(*pudp)) {
ptep = (pte_t *)pudp;
goto update_the_pte;
}
pmdp = pmd_alloc(&init_mm, pudp, idx);
if (!pmdp)
continue;
- if (pmd_huge(*pmdp)) {
+ if (pmd_is_leaf(*pmdp)) {
ptep = pmdp_ptep(pmdp);
goto update_the_pte;
}
@@ -835,7 +835,7 @@ static void remove_pmd_table(pmd_t *pmd_start, unsigned long addr,
if (!pmd_present(*pmd))
continue;
- if (pmd_huge(*pmd)) {
+ if (pmd_is_leaf(*pmd)) {
split_kernel_mapping(addr, end, PMD_SIZE, (pte_t *)pmd);
continue;
}
@@ -860,7 +860,7 @@ static void remove_pud_table(pud_t *pud_start, unsigned long addr,
if (!pud_present(*pud))
continue;
- if (pud_huge(*pud)) {
+ if (pud_is_leaf(*pud)) {
split_kernel_mapping(addr, end, PUD_SIZE, (pte_t *)pud);
continue;
}
@@ -886,7 +886,7 @@ static void __meminit remove_pagetable(unsigned long start, unsigned long end)
if (!pgd_present(*pgd))
continue;
- if (pgd_huge(*pgd)) {
+ if (pgd_is_leaf(*pgd)) {
split_kernel_mapping(addr, end, PGDIR_SIZE, (pte_t *)pgd);
continue;
}
diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c
index 533fc6fa672670614c193339f2dd4285963781b3..2029e585e5c33162b586a8dfa1c3e949d0c525b5 100644
--- a/arch/powerpc/mm/pgtable.c
+++ b/arch/powerpc/mm/pgtable.c
@@ -340,10 +340,11 @@ pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
if (pgd_none(pgd))
return NULL;
- if (pgd_huge(pgd)) {
+ if (pgd_is_leaf(pgd)) {
ret_pte = (pte_t *)pgdp;
goto out;
}
+
if (is_hugepd(__hugepd(pgd_val(pgd)))) {
hpdp = (hugepd_t *)&pgd;
goto out_huge;
@@ -361,14 +362,16 @@ pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
if (pud_none(pud))
return NULL;
- if (pud_huge(pud)) {
+ if (pud_is_leaf(pud)) {
ret_pte = (pte_t *)pudp;
goto out;
}
+
if (is_hugepd(__hugepd(pud_val(pud)))) {
hpdp = (hugepd_t *)&pud;
goto out_huge;
}
+
pdshift = PMD_SHIFT;
pmdp = pmd_offset(&pud, ea);
pmd = READ_ONCE(*pmdp);
@@ -397,15 +400,12 @@ pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
ret_pte = (pte_t *)pmdp;
goto out;
}
- /*
- * pmd_large check below will handle the swap pmd pte
- * we need to do both the check because they are config
- * dependent.
- */
- if (pmd_huge(pmd) || pmd_large(pmd)) {
+
+ if (pmd_is_leaf(pmd)) {
ret_pte = (pte_t *)pmdp;
goto out;
}
+
if (is_hugepd(__hugepd(pmd_val(pmd)))) {
hpdp = (hugepd_t *)&pmd;
goto out_huge;
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index 63cd811306435184b0545cf618fa34dc975914ad..2892246a6fef48a2c3c54d384fccbc7804f5bb90 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -309,16 +309,20 @@ EXPORT_SYMBOL(__iounmap_at);
/* 4 level page table */
struct page *pgd_page(pgd_t pgd)
{
- if (pgd_huge(pgd))
+ if (pgd_is_leaf(pgd)) {
+ VM_WARN_ON(!pgd_huge(pgd));
return pte_page(pgd_pte(pgd));
+ }
return virt_to_page(pgd_page_vaddr(pgd));
}
#endif
struct page *pud_page(pud_t pud)
{
- if (pud_huge(pud))
+ if (pud_is_leaf(pud)) {
+ VM_WARN_ON(!pud_huge(pud));
return pte_page(pud_pte(pud));
+ }
return virt_to_page(pud_page_vaddr(pud));
}
@@ -328,8 +332,10 @@ struct page *pud_page(pud_t pud)
*/
struct page *pmd_page(pmd_t pmd)
{
- if (pmd_large(pmd) || pmd_huge(pmd) || pmd_devmap(pmd))
+ if (pmd_is_leaf(pmd)) {
+ VM_WARN_ON(!(pmd_large(pmd) || pmd_huge(pmd) || pmd_devmap(pmd)));
return pte_page(pmd_pte(pmd));
+ }
return virt_to_page(pmd_page_vaddr(pmd));
}
diff --git a/arch/powerpc/mm/ptdump/ptdump.c b/arch/powerpc/mm/ptdump/ptdump.c
index 646876d9da640fac314b7f1120af7f368439b588..abe60d25b4e6f7ac476e10feaf15b3d9321773d5 100644
--- a/arch/powerpc/mm/ptdump/ptdump.c
+++ b/arch/powerpc/mm/ptdump/ptdump.c
@@ -277,7 +277,7 @@ static void walk_pmd(struct pg_state *st, pud_t *pud, unsigned long start)
for (i = 0; i < PTRS_PER_PMD; i++, pmd++) {
addr = start + i * PMD_SIZE;
- if (!pmd_none(*pmd) && !pmd_huge(*pmd))
+ if (!pmd_none(*pmd) && !pmd_is_leaf(*pmd))
/* pmd exists */
walk_pte(st, pmd, addr);
else
@@ -293,7 +293,7 @@ static void walk_pud(struct pg_state *st, pgd_t *pgd, unsigned long start)
for (i = 0; i < PTRS_PER_PUD; i++, pud++) {
addr = start + i * PUD_SIZE;
- if (!pud_none(*pud) && !pud_huge(*pud))
+ if (!pud_none(*pud) && !pud_is_leaf(*pud))
/* pud exists */
walk_pmd(st, pud, addr);
else
@@ -314,7 +314,7 @@ static void walk_pagetables(struct pg_state *st)
* the hash pagetable.
*/
for (i = 0; i < PTRS_PER_PGD; i++, pgd++, addr += PGDIR_SIZE) {
- if (!pgd_none(*pgd) && !pgd_huge(*pgd))
+ if (!pgd_none(*pgd) && !pgd_is_leaf(*pgd))
/* pgd exists */
walk_pud(st, pgd, addr);
else
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index f879e9fe9733581124bcfce0b3682a73df0231d6..2ec20a5bb556bdaf85f54856471084cb276c1fb2 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -3098,7 +3098,7 @@ static void show_pte(unsigned long addr)
printf("pgd @ 0x%px\n", pgdir);
- if (pgd_huge(*pgdp)) {
+ if (pgd_is_leaf(*pgdp)) {
format_pte(pgdp, pgd_val(*pgdp));
return;
}
@@ -3111,7 +3111,7 @@ static void show_pte(unsigned long addr)
return;
}
- if (pud_huge(*pudp)) {
+ if (pud_is_leaf(*pudp)) {
format_pte(pudp, pud_val(*pudp));
return;
}
@@ -3125,7 +3125,7 @@ static void show_pte(unsigned long addr)
return;
}
- if (pmd_huge(*pmdp)) {
+ if (pmd_is_leaf(*pmdp)) {
format_pte(pmdp, pmd_val(*pmdp));
return;
}