[PATCH mm-unstable v7 18/31] arm64: Convert various functions to use ptdescs

Vishal Moola (Oracle)
2023-07-25T04:24:47Z

As part of the conversions to replace pgtable constructor/destructors with
ptdesc equivalents, convert various page table functions to use ptdescs.

Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
---
arch/arm64/include/asm/tlb.h | 14 ++++++++------
arch/arm64/mm/mmu.c | 7 ++++---
2 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h
index c995d1f4594f..2c29239d05c3 100644
--- a/arch/arm64/include/asm/tlb.h
+++ b/arch/arm64/include/asm/tlb.h
@@ -75,18 +75,20 @@ static inline void tlb_flush(struct mmu_gather *tlb)
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
unsigned long addr)
{
- pgtable_pte_page_dtor(pte);
- tlb_remove_table(tlb, pte);
+ struct ptdesc *ptdesc = page_ptdesc(pte);
+
+ pagetable_pte_dtor(ptdesc);
+ tlb_remove_ptdesc(tlb, ptdesc);
}

#if CONFIG_PGTABLE_LEVELS > 2
static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
unsigned long addr)
{
- struct page *page = virt_to_page(pmdp);
+ struct ptdesc *ptdesc = virt_to_ptdesc(pmdp);

- pgtable_pmd_page_dtor(page);
- tlb_remove_table(tlb, page);
+ pagetable_pmd_dtor(ptdesc);
+ tlb_remove_ptdesc(tlb, ptdesc);
}
#endif

@@ -94,7 +96,7 @@ static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
unsigned long addr)
{
- tlb_remove_table(tlb, virt_to_page(pudp));
+ tlb_remove_ptdesc(tlb, virt_to_ptdesc(pudp));
}
#endif

diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 95d360805f8a..47781bec6171 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -426,6 +426,7 @@ static phys_addr_t __pgd_pgtable_alloc(int shift)
static phys_addr_t pgd_pgtable_alloc(int shift)
{
phys_addr_t pa = __pgd_pgtable_alloc(shift);
+ struct ptdesc *ptdesc = page_ptdesc(phys_to_page(pa));

/*
* Call proper page table ctor in case later we need to
@@ -433,12 +434,12 @@ static phys_addr_t pgd_pgtable_alloc(int shift)
* this pre-allocated page table.
*
* We don't select ARCH_ENABLE_SPLIT_PMD_PTLOCK if pmd is
- * folded, and if so pgtable_pmd_page_ctor() becomes nop.
+ * folded, and if so pagetable_pte_ctor() becomes nop.
*/
if (shift == PAGE_SHIFT)
- BUG_ON(!pgtable_pte_page_ctor(phys_to_page(pa)));
+ BUG_ON(!pagetable_pte_ctor(ptdesc));
else if (shift == PMD_SHIFT)
- BUG_ON(!pgtable_pmd_page_ctor(phys_to_page(pa)));
+ BUG_ON(!pagetable_pmd_ctor(ptdesc));

return pa;
}
--
2.40.1