linux-kernel - Re: [PATCH 3/4] RISC-V: Fix L1_CACHE_BYTES for RV32

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Date:   Mon, 11 Jan 2021 09:30:01 +0530
From:   Anup Patel <anup@...infault.org>
To:     Atish Patra <atish.patra@....com>
Cc:     "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Anup Patel <anup.patel@....com>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Nick Kossifidis <mick@....forth.gr>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Mike Rapoport <rppt@...nel.org>
Subject: Re: [PATCH 3/4] RISC-V: Fix L1_CACHE_BYTES for RV32

On Thu, Jan 7, 2021 at 2:57 PM Atish Patra <atish.patra@....com> wrote:
>
> SMP_CACHE_BYTES/L1_CACHE_BYTES should be defined as 32 instead of
> 64 for RV32. Otherwise, there will be hole of 32 bytes with each memblock
> allocation if it is requested to be aligned with SMP_CACHE_BYTES.
>
> Signed-off-by: Atish Patra <atish.patra@....com>

Looks good to me.

Reviewed-by: Anup Patel <anup@...infault.org>

> ---
>  arch/riscv/include/asm/cache.h | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/arch/riscv/include/asm/cache.h b/arch/riscv/include/asm/cache.h
> index 9b58b104559e..c9c669ea2fe6 100644
> --- a/arch/riscv/include/asm/cache.h
> +++ b/arch/riscv/include/asm/cache.h
> @@ -7,7 +7,11 @@
>  #ifndef _ASM_RISCV_CACHE_H
>  #define _ASM_RISCV_CACHE_H
>
> +#ifdef CONFIG_64BIT
>  #define L1_CACHE_SHIFT         6
> +#else
> +#define L1_CACHE_SHIFT         5
> +#endif
>
>  #define L1_CACHE_BYTES         (1 << L1_CACHE_SHIFT)
>
> --
> 2.25.1
>
>
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv

Regards,
Anup

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