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riscv: Flush the tlb when a page directory is freed

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[ Upstream commit 97cf301fa4 ]

The riscv privileged specification mandates to flush the TLB whenever a
page directory is modified, so add that to tlb_flush().

Fixes: c5e9b2c2ae ("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>
This commit is contained in:
Alexandre Ghiti 2024-01-28 13:04:05 +01:00 committed by Greg Kroah-Hartman
parent aceb4ab968
commit f4b69db0ef
1 changed files with 1 additions and 1 deletions
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2
arch/riscv/include/asm/tlb.h
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@ -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,