Received-SPF: pass (google.com: domain of linux-kernel+bounces-54106-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
Date: Mon, 5 Feb 2024 15:53:54 -0800
From: Charlie Jenkins <charlie@rivosinc.com>
To: Alexandre Ghiti <alexghiti@rivosinc.com>
Cc: Will Deacon <will@kernel.org>,
	"Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Nick Piggin <npiggin@gmail.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Samuel Holland <samuel.holland@sifive.com>,
	Andrew Jones <ajones@ventanamicro.com>, linux-arch@vger.kernel.org,
	linux-mm@kvack.org, linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH -fixes] riscv: Flush the tlb when a page directory is
 freed
Message-ID: <ZcF1Er55ClKgJtHJ@ghost>
References: <20240128120405.25876-1-alexghiti@rivosinc.com>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20240128120405.25876-1-alexghiti@rivosinc.com>

On Sun, Jan 28, 2024 at 01:04:05PM +0100, Alexandre Ghiti wrote:
> 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>
> ---
>  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,
> -- 
> 2.39.2
> 
> 
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv

Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>