6.6-stable review patch. If anyone has any objections, please let me know.
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From: Alexandre Ghiti alexghiti@rivosinc.com
[ 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 alexghiti@rivosinc.com Reviewed-by: Charlie Jenkins charlie@rivosinc.com Link: https://lore.kernel.org/r/20240128120405.25876-1-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt palmer@rivosinc.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 1eb5682b2af6..50b63b5c15bd 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,