From: Anup Patel <anup@brainfault.org>
To: Guo Ren <guoren@kernel.org>
Cc: Anup Patel <anup.patel@wdc.com>,
Palmer Dabbelt <palmerdabbelt@google.com>,
Arnd Bergmann <arnd@arndb.de>,
linux-riscv <linux-riscv@lists.infradead.org>,
"linux-kernel@vger.kernel.org List"
<linux-kernel@vger.kernel.org>,
linux-arch <linux-arch@vger.kernel.org>,
linux-sunxi@lists.linux.dev, Guo Ren <guoren@linux.alibaba.com>
Subject: Re: [PATCH 1/3] riscv: Fixup _PAGE_GLOBAL in _PAGE_KERNEL
Date: Mon, 24 May 2021 13:33:08 +0530 [thread overview]
Message-ID: <CAAhSdy3ORUGqyL-9oMQCKYCXnG8M=xrZ8q+AiWg8s+v6zsk=_A@mail.gmail.com> (raw)
In-Reply-To: <1621839068-31738-1-git-send-email-guoren@kernel.org>
On Mon, May 24, 2021 at 12:22 PM <guoren@kernel.org> wrote:
>
> From: Guo Ren <guoren@linux.alibaba.com>
>
> Kernel virtual address translation should avoid care asid or it'll
> cause more TLB-miss and TLB-refill. Because the current asid in satp
> belongs to the current process, but the target kernel va TLB entry's
> asid still belongs to the previous process.
>
> Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
> Cc: Anup Patel <anup.patel@wdc.com>
> Cc: Palmer Dabbelt <palmerdabbelt@google.com>
First of all thanks for doing this series, I had similar changes in mind
as follow-up to the ASID allocator.
I went through all three patches and at least I don't see any
obvious issue but I think we should try testing it more on a few
existing platforms.
Reviewed-by: Anup Patel <anup@brainfault.org>
Regards,
Anup
> ---
> arch/riscv/include/asm/pgtable.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
> index 78f2323..017da15 100644
> --- a/arch/riscv/include/asm/pgtable.h
> +++ b/arch/riscv/include/asm/pgtable.h
> @@ -135,6 +135,7 @@
> | _PAGE_PRESENT \
> | _PAGE_ACCESSED \
> | _PAGE_DIRTY \
> + | _PAGE_GLOBAL \
> | _PAGE_CACHE)
>
> #define PAGE_KERNEL __pgprot(_PAGE_KERNEL)
> --
> 2.7.4
>
next prev parent reply other threads:[~2021-05-24 8:03 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-24 6:51 guoren
2021-05-24 6:51 ` [PATCH 2/3] riscv: Fixup PAGE_UP in asm/page.h guoren
2021-05-25 6:34 ` Christoph Hellwig
2021-05-25 9:28 ` Guo Ren
2021-05-25 9:34 ` Christoph Hellwig
2021-05-24 6:51 ` [PATCH 3/3] riscv: Use use_asid_allocator flush TLB guoren
2021-05-24 8:13 ` Anup Patel
2021-05-24 8:03 ` Anup Patel [this message]
2021-05-24 8:22 ` [PATCH 1/3] riscv: Fixup _PAGE_GLOBAL in _PAGE_KERNEL Guo Ren
2021-05-24 10:42 ` Anup Patel
2021-05-24 12:01 ` Guo Ren
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