[PATCH v1 3/3] arm64/mm: Elide tlbi in contpte_convert() under BBML2
From: Mikołaj Lenczewski <hidden>
Date: 2025-02-19 14:46:23
Also in:
lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
If we support bbml2 without conflict aborts, we can avoid the final flush and have hardware manage the tlb entries for us. Avoiding flushes is a win. Signed-off-by: Mikołaj Lenczewski <redacted> Reviewed-by: Ryan Roberts <ryan.roberts@arm.com> --- arch/arm64/mm/contpte.c | 3 --- 1 file changed, 3 deletions(-)
diff --git a/arch/arm64/mm/contpte.c b/arch/arm64/mm/contpte.c
index e26e8f8cfb9b..26a86248f897 100644
--- a/arch/arm64/mm/contpte.c
+++ b/arch/arm64/mm/contpte.c@@ -72,9 +72,6 @@ static void contpte_convert(struct mm_struct *mm, unsigned long addr, __flush_tlb_range(&vma, start_addr, addr, PAGE_SIZE, true, 3); __set_ptes(mm, start_addr, start_ptep, pte, CONT_PTES); - - if (system_supports_bbml2_noconflict()) - __flush_tlb_range(&vma, start_addr, addr, PAGE_SIZE, true, 3); } void __contpte_try_fold(struct mm_struct *mm, unsigned long addr,
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2.45.3