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[v1,3/3] arm64/mm: Elide tlbi in contpte_convert() under BBML2

Message ID 20250219143837.44277-7-miko.lenczewski@arm.com (mailing list archive)
State New
Headers show
Series Initial BBML2 support for contpte_convert() | expand

Commit Message

Mikołaj Lenczewski Feb. 19, 2025, 2:38 p.m. UTC 
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 <miko.lenczewski@arm.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
---
 arch/arm64/mm/contpte.c | 3 ---
 1 file changed, 3 deletions(-)
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Patch

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,