Re: [PATCH 1/3] riscv: Fixup _PAGE_GLOBAL in _PAGE_KERNEL

Anup Patel
2021-05-24T18:15:46Z

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>
> ---
> 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)

It seems this patch is not based on the upstream kernel. The
_PAGE_CACHE seems to be from your other patch series.

Please rebase these patches on the latest upstream kernel without
dependency on any other patch series.

Regards,
Anup

>
> #define PAGE_KERNEL __pgprot(_PAGE_KERNEL)
> --
> 2.7.4