linux-kernel - Re: [PATCH v7 01/10] RISC-V: Mark existing SBI as 0.1 SBI.

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Date:   Fri, 6 Mar 2020 11:32:34 +0800
From:   Bin Meng <bmeng.cn@...il.com>
To:     Atish Patra <atish.patra@....com>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Thomas Gleixner <tglx@...utronix.de>,
        Kees Cook <keescook@...omium.org>,
        "Chang, Abner (HPS SW/FW Technologist)" <abner.chang@....com>,
        Vincent Chen <vincent.chen@...ive.com>, nickhu@...estech.com,
        Anup Patel <anup@...infault.org>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Mike Rapoport <rppt@...ux.ibm.com>, clin@...e.com,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Greentime Hu <greentime.hu@...ive.com>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Borislav Petkov <bp@...e.de>,
        Palmer Dabbelt <palmer@...belt.com>,
        Mao Han <han_mao@...ky.com>
Subject: Re: [PATCH v7 01/10] RISC-V: Mark existing SBI as 0.1 SBI.

On Tue, Jan 28, 2020 at 10:28 AM Atish Patra <atish.patra@....com> wrote:
>
> As per the new SBI specification, current SBI implementation version
> is defined as 0.1 and will be removed/replaced in future. Each of the
> function call in 0.1 is defined as a separate extension which makes
> easier to replace them one at a time.
>
> Rename existing implementation to reflect that. This patch is just
> a preparatory patch for SBI v0.2 and doesn't introduce any functional
> changes.
>
> Signed-off-by: Atish Patra <atish.patra@....com>
> Reviewed-by: Anup Patel <anup@...infault.org>
> Reviewed-by: Palmer Dabbelt <palmerdabbelt@...gle.com>
> ---
>  arch/riscv/include/asm/sbi.h | 44 ++++++++++++++++++++----------------
>  1 file changed, 24 insertions(+), 20 deletions(-)
>
> diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
> index 2570c1e683d3..b38bc36f7429 100644
> --- a/arch/riscv/include/asm/sbi.h
> +++ b/arch/riscv/include/asm/sbi.h
> @@ -1,6 +1,7 @@
>  /* SPDX-License-Identifier: GPL-2.0-only */
>  /*
>   * Copyright (C) 2015 Regents of the University of California
> + * Copyright (c) 2019 Western Digital Corporation or its affiliates.
>   */
>
>  #ifndef _ASM_RISCV_SBI_H
> @@ -9,17 +10,17 @@
>  #include <linux/types.h>
>
>  #ifdef CONFIG_RISCV_SBI
> -#define SBI_SET_TIMER 0
> -#define SBI_CONSOLE_PUTCHAR 1
> -#define SBI_CONSOLE_GETCHAR 2
> -#define SBI_CLEAR_IPI 3
> -#define SBI_SEND_IPI 4
> -#define SBI_REMOTE_FENCE_I 5
> -#define SBI_REMOTE_SFENCE_VMA 6
> -#define SBI_REMOTE_SFENCE_VMA_ASID 7
> -#define SBI_SHUTDOWN 8
> +#define SBI_EXT_0_1_SET_TIMER 0x0
> +#define SBI_EXT_0_1_CONSOLE_PUTCHAR 0x1
> +#define SBI_EXT_0_1_CONSOLE_GETCHAR 0x2
> +#define SBI_EXT_0_1_CLEAR_IPI 0x3
> +#define SBI_EXT_0_1_SEND_IPI 0x4
> +#define SBI_EXT_0_1_REMOTE_FENCE_I 0x5
> +#define SBI_EXT_0_1_REMOTE_SFENCE_VMA 0x6
> +#define SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID 0x7
> +#define SBI_EXT_0_1_SHUTDOWN 0x8
>
> -#define SBI_CALL(which, arg0, arg1, arg2, arg3) ({             \
> +#define SBI_CALL(which, arg0, arg1, arg2, arg3) ({             \

nits: this line should not be changed

>         register uintptr_t a0 asm ("a0") = (uintptr_t)(arg0);   \
>         register uintptr_t a1 asm ("a1") = (uintptr_t)(arg1);   \
>         register uintptr_t a2 asm ("a2") = (uintptr_t)(arg2);   \
> @@ -43,48 +44,50 @@
>

[snip]

Regards,
Bin