[-fixes] riscv: Fix arch_hugetlb_migration_supported() for NAPOT

Commit Message

Alexandre Ghiti Jan. 30, 2024, 12:01 p.m. UTC

arch_hugetlb_migration_supported() must be reimplemented to add support
for NAPOT hugepages, which is done here.

Fixes: 82a1a1f3bfb6 ("riscv: mm: support Svnapot in hugetlb page")
Signed-off-by: Alexandre Ghiti <[e-mail]>
---
 arch/riscv/include/asm/hugetlb.h |  3 +++
 arch/riscv/mm/hugetlbpage.c      | 16 +++++++++++++---
 2 files changed, 16 insertions(+), 3 deletions(-)

Comments

[e-mail] Feb. 8, 2024, 1:30 a.m. UTC | #1

Hello:

This patch was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <[e-mail]>:

On Tue, 30 Jan 2024 13:01:14 +0100 you wrote:
> arch_hugetlb_migration_supported() must be reimplemented to add support
> for NAPOT hugepages, which is done here.
> 
> Fixes: 82a1a1f3bfb6 ("riscv: mm: support Svnapot in hugetlb page")
> Signed-off-by: Alexandre Ghiti <[e-mail]>
> ---
>  arch/riscv/include/asm/hugetlb.h |  3 +++
>  arch/riscv/mm/hugetlbpage.c      | 16 +++++++++++++---
>  2 files changed, 16 insertions(+), 3 deletions(-)

Here is the summary with links:
  - [-fixes] riscv: Fix arch_hugetlb_migration_supported() for NAPOT
    https://git.kernel.org/riscv/c/ce68c035457b

You are awesome, thank you!

Patch

diff --git a/arch/riscv/include/asm/hugetlb.h b/arch/riscv/include/asm/hugetlb.h
index 4c5b0e929890..20f9c3ba2341 100644
--- a/arch/riscv/include/asm/hugetlb.h
+++ b/arch/riscv/include/asm/hugetlb.h
@@ -11,6 +11,9 @@  static inline void arch_clear_hugepage_flags(struct page *page)
 }
 #define arch_clear_hugepage_flags arch_clear_hugepage_flags
 
+bool arch_hugetlb_migration_supported(struct hstate *h);
+#define arch_hugetlb_migration_supported arch_hugetlb_migration_supported
+
 #ifdef CONFIG_RISCV_ISA_SVNAPOT
 #define __HAVE_ARCH_HUGE_PTE_CLEAR
 void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
diff --git a/arch/riscv/mm/hugetlbpage.c b/arch/riscv/mm/hugetlbpage.c
index 87406b26c3da..29c7606414d2 100644
--- a/arch/riscv/mm/hugetlbpage.c
+++ b/arch/riscv/mm/hugetlbpage.c
@@ -364,7 +364,7 @@  void huge_pte_clear(struct mm_struct *mm,
 		pte_clear(mm, addr, ptep);
 }
 
-static __init bool is_napot_size(unsigned long size)
+static bool is_napot_size(unsigned long size)
 {
 	unsigned long order;
 
@@ -392,7 +392,7 @@  arch_initcall(napot_hugetlbpages_init);
 
 #else
 
-static __init bool is_napot_size(unsigned long size)
+static bool is_napot_size(unsigned long size)
 {
 	return false;
 }
@@ -409,7 +409,7 @@  int pmd_huge(pmd_t pmd)
 	return pmd_leaf(pmd);
 }
 
-bool __init arch_hugetlb_valid_size(unsigned long size)
+static bool __hugetlb_valid_size(unsigned long size)
 {
 	if (size == HPAGE_SIZE)
 		return true;
@@ -421,6 +421,16 @@  bool __init arch_hugetlb_valid_size(unsigned long size)
 		return false;
 }
 
+bool __init arch_hugetlb_valid_size(unsigned long size)
+{
+	return __hugetlb_valid_size(size);
+}
+
+bool arch_hugetlb_migration_supported(struct hstate *h)
+{
+	return __hugetlb_valid_size(huge_page_size(h));
+}
+
 #ifdef CONFIG_CONTIG_ALLOC
 static __init int gigantic_pages_init(void)
 {