From f4b69db0efca10cd140a4478520f3835a56a898d Mon Sep 17 00:00:00 2001 From: Alexandre Ghiti Date: Sun, 28 Jan 2024 13:04:05 +0100 Subject: [PATCH] riscv: Flush the tlb when a page directory is freed [ Upstream commit 97cf301fa42e8ea6e0a24de97bc0abcdc87d9504 ] The riscv privileged specification mandates to flush the TLB whenever a page directory is modified, so add that to tlb_flush(). Fixes: c5e9b2c2ae82 ("riscv: Improve tlb_flush()") Signed-off-by: Alexandre Ghiti Reviewed-by: Charlie Jenkins Link: https://lore.kernel.org/r/20240128120405.25876-1-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt Signed-off-by: Sasha Levin --- arch/riscv/include/asm/tlb.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/riscv/include/asm/tlb.h b/arch/riscv/include/asm/tlb.h index 1eb5682..50b63b5 100644 --- a/arch/riscv/include/asm/tlb.h +++ b/arch/riscv/include/asm/tlb.h @@ -16,7 +16,7 @@ static void tlb_flush(struct mmu_gather *tlb); static inline void tlb_flush(struct mmu_gather *tlb) { #ifdef CONFIG_MMU - if (tlb->fullmm || tlb->need_flush_all) + if (tlb->fullmm || tlb->need_flush_all || tlb->freed_tables) flush_tlb_mm(tlb->mm); else flush_tlb_mm_range(tlb->mm, tlb->start, tlb->end, -- 2.7.4