On 2023/12/14 15:39, Nanyong Sun wrote:
Add pmd/pte update and tlb flush helper function to update page
table. This refactoring patch is designed to facilitate each
architecture to implement its own special logic in preparation
for the arm64 architecture to follow the necessary break-before-make
sequence when updating page tables.
Signed-off-by: Nanyong Sun <sunnanyong@xxxxxxxxxx>
---
mm/hugetlb_vmemmap.c | 55 ++++++++++++++++++++++++++++++++++----------
1 file changed, 43 insertions(+), 12 deletions(-)
diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index 87818ee7f01d..49e8b351def3 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -45,6 +45,37 @@ struct vmemmap_remap_walk {
unsigned long flags;
};
+#ifndef vmemmap_update_pmd
+static inline void vmemmap_update_pmd(unsigned long start,
+ pmd_t *pmd, pte_t *pgtable)
pgtable -> ptep
+{
+ pmd_populate_kernel(&init_mm, pmd, pgtable);
+}
+#endif
+
+#ifndef vmemmap_update_pte
+static inline void vmemmap_update_pte(unsigned long addr,
+ pte_t *pte, pte_t entry)
pte -> ptep
entry -> pte
+{
+ set_pte_at(&init_mm, addr, pte, entry);
+}
+#endif
