From: Luiz Capitulino <luizcap@redhat.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
david@kernel.org, baolin.wang@linux.alibaba.com, ziy@nvidia.com,
lance.yang@linux.dev
Cc: corbet@lwn.net, tsbogend@alpha.franken.de, maddy@linux.ibm.com,
mpe@ellerman.id.au, agordeev@linux.ibm.com,
gerald.schaefer@linux.ibm.com, hca@linux.ibm.com,
gor@linux.ibm.com, x86@kernel.org, tglx@kernel.org,
mingo@redhat.com, bp@alien8.de, hughd@google.com,
dave.hansen@linux.intel.com, djbw@kernel.org,
vishal.l.verma@intel.com, dave.jiang@intel.com,
akpm@linux-foundation.org, yintirui@huawei.com, dev.jain@arm.com,
usama.arif@linux.dev
Subject: [PATCH v7 09/14] powerpc: move has_transparent_hugepage() out of THP guard
Date: Mon, 31 Aug 2026 23:12:13 -0400 [thread overview]
Message-ID: <5d7ed96fc5c9ffe357eca9cb48bd679d658dd8e0.1788232334.git.luizcap@redhat.com> (raw)
In-Reply-To: <cover.1788232334.git.luizcap@redhat.com>
A future commit will introduce a kernel API to allow for checking if the
CPU supports PMD-sized pages. This API will be based on the
has_transparent_hugepage() implementation but will be orthogonal to THP
and therefore must work when CONFIG_TRANSPARENT_HUGEPAGE=n.
Move its definition out of the THP guard.
Signed-off-by: Luiz Capitulino <luizcap@redhat.com>
---
arch/powerpc/include/asm/book3s/64/hash-4k.h | 2 +-
arch/powerpc/include/asm/book3s/64/hash-64k.h | 2 +-
arch/powerpc/include/asm/book3s/64/pgtable.h | 18 +++++++++---------
arch/powerpc/include/asm/book3s/64/radix.h | 14 +++++++-------
arch/powerpc/mm/book3s64/hash_pgtable.c | 4 ++--
5 files changed, 20 insertions(+), 20 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/64/hash-4k.h b/arch/powerpc/include/asm/book3s/64/hash-4k.h
index 8e5bd9902bed..79511e6abfca 100644
--- a/arch/powerpc/include/asm/book3s/64/hash-4k.h
+++ b/arch/powerpc/include/asm/book3s/64/hash-4k.h
@@ -165,9 +165,9 @@ extern void hash__pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
extern pgtable_t hash__pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
extern pmd_t hash__pmdp_huge_get_and_clear(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp);
-extern int hash__has_transparent_hugepage(void);
#endif
+extern int hash__has_transparent_hugepage(void);
#endif /* !__ASSEMBLER__ */
#endif /* _ASM_POWERPC_BOOK3S_64_HASH_4K_H */
diff --git a/arch/powerpc/include/asm/book3s/64/hash-64k.h b/arch/powerpc/include/asm/book3s/64/hash-64k.h
index 7deb3a66890b..a4a44a112ff9 100644
--- a/arch/powerpc/include/asm/book3s/64/hash-64k.h
+++ b/arch/powerpc/include/asm/book3s/64/hash-64k.h
@@ -278,9 +278,9 @@ extern void hash__pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
extern pgtable_t hash__pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
extern pmd_t hash__pmdp_huge_get_and_clear(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp);
-extern int hash__has_transparent_hugepage(void);
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+extern int hash__has_transparent_hugepage(void);
#endif /* __ASSEMBLER__ */
#endif /* _ASM_POWERPC_BOOK3S_64_HASH_64K_H */
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index f4db7d7fbd5c..2a795f6d9263 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -1121,15 +1121,6 @@ static inline void update_mmu_cache_pud(struct vm_area_struct *vma,
{
}
-extern int hash__has_transparent_hugepage(void);
-static inline int has_transparent_hugepage(void)
-{
- if (radix_enabled())
- return radix__has_transparent_hugepage();
- return hash__has_transparent_hugepage();
-}
-#define has_transparent_hugepage has_transparent_hugepage
-
static inline int has_transparent_pud_hugepage(void)
{
if (radix_enabled())
@@ -1441,6 +1432,15 @@ static inline bool arch_needs_pgtable_deposit(void)
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+extern int hash__has_transparent_hugepage(void);
+static inline int has_transparent_hugepage(void)
+{
+ if (radix_enabled())
+ return radix__has_transparent_hugepage();
+ return hash__has_transparent_hugepage();
+}
+#define has_transparent_hugepage has_transparent_hugepage
+
#define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
pte_t ptep_modify_prot_start(struct vm_area_struct *, unsigned long, pte_t *);
void ptep_modify_prot_commit(struct vm_area_struct *, unsigned long,
diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h
index da954e779744..50545cf519bd 100644
--- a/arch/powerpc/include/asm/book3s/64/radix.h
+++ b/arch/powerpc/include/asm/book3s/64/radix.h
@@ -298,22 +298,22 @@ extern pmd_t radix__pmdp_huge_get_and_clear(struct mm_struct *mm,
pud_t radix__pudp_huge_get_and_clear(struct mm_struct *mm,
unsigned long addr, pud_t *pudp);
-static inline int radix__has_transparent_hugepage(void)
+static inline int radix__has_transparent_pud_hugepage(void)
{
- /* For radix 2M at PMD level means thp */
- if (mmu_psize_defs[MMU_PAGE_2M].shift == PMD_SHIFT)
+ /* For radix 1G at PUD level means pud hugepage support */
+ if (mmu_psize_defs[MMU_PAGE_1G].shift == PUD_SHIFT)
return 1;
return 0;
}
+#endif
-static inline int radix__has_transparent_pud_hugepage(void)
+static inline int radix__has_transparent_hugepage(void)
{
- /* For radix 1G at PUD level means pud hugepage support */
- if (mmu_psize_defs[MMU_PAGE_1G].shift == PUD_SHIFT)
+ /* For radix 2M at PMD level means thp */
+ if (mmu_psize_defs[MMU_PAGE_2M].shift == PMD_SHIFT)
return 1;
return 0;
}
-#endif
struct vmem_altmap;
struct dev_pagemap;
diff --git a/arch/powerpc/mm/book3s64/hash_pgtable.c b/arch/powerpc/mm/book3s64/hash_pgtable.c
index d9b5b751d7b7..50316f3fc5d3 100644
--- a/arch/powerpc/mm/book3s64/hash_pgtable.c
+++ b/arch/powerpc/mm/book3s64/hash_pgtable.c
@@ -391,6 +391,8 @@ pmd_t hash__pmdp_huge_get_and_clear(struct mm_struct *mm,
return old_pmd;
}
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+
int hash__has_transparent_hugepage(void)
{
@@ -422,8 +424,6 @@ int hash__has_transparent_hugepage(void)
}
EXPORT_SYMBOL_GPL(hash__has_transparent_hugepage);
-#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-
#ifdef CONFIG_STRICT_KERNEL_RWX
struct change_memory_parms {
--
2.55.0
next prev parent reply other threads:[~2026-09-01 3:13 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 3:12 [PATCH v7 00/14] mm: thp: always enable mTHP support Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 01/14] docs: tmpfs: remove implementation detail reference Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 02/14] mm: shmem: shmem_getattr(): set blksize to highest supported THP order Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 03/14] mm: introduce pgtable_has_pmd_leaves() Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 04/14] drivers: dax: use pgtable_has_pmd_leaves() Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 05/14] drivers: nvdimm: " Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 06/14] mm: debug_vm_pgtable: " Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 07/14] mm: shmem: allow THP support determination at folio allocation time Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 08/14] s390: move has_transparent_hugepage() out of THP guard Luiz Capitulino
2026-09-01 3:12 ` Luiz Capitulino [this message]
2026-09-01 3:12 ` [PATCH v7 10/14] mips: " Luiz Capitulino
2026-09-01 11:42 ` Lance Yang
2026-09-01 19:53 ` Luiz Capitulino
2026-09-01 22:25 ` Thomas Bogendoerfer
2026-09-02 15:12 ` Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 11/14] x86: " Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 12/14] treewide: introduce arch_has_pmd_leaves() Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 13/14] mm: replace thp_disabled_by_hw() with pgtable_has_pmd_leaves() Luiz Capitulino
2026-09-01 3:12 ` [PATCH v7 14/14] mm: thp: always enable mTHP support Luiz Capitulino
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