linux-kernel - Re: [PATCH v12 04/17] riscv: Add vector feature to compile

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Date:   Mon, 07 Nov 2022 18:21:54 +0100
From:   Björn Töpel <bjorn@...nel.org>
To:     Chris Stillson <stillson@...osinc.com>
Cc:     Greentime Hu <greentime.hu@...ive.com>,
        Guo Ren <guoren@...ux.alibaba.com>,
        Vincent Chen <vincent.chen@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>, Guo Ren <guoren@...nel.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v12 04/17] riscv: Add vector feature to compile

[Cropping the huge Cc:-list.]

Chris Stillson <stillson@...osinc.com> writes:

> From: Guo Ren <guoren@...ux.alibaba.com>
>
> This patch adds a new config option which could enable assembler's
> vector feature.
>
> Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
> Co-developed-by: Greentime Hu <greentime.hu@...ive.com>
> Signed-off-by: Greentime Hu <greentime.hu@...ive.com>
> ---
>  arch/riscv/Kconfig  | 15 +++++++++++++--
>  arch/riscv/Makefile |  1 +
>  2 files changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index ed66c31e4655..e294d85bfb7d 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -432,7 +432,17 @@ config FPU
>  
>  	  If you don't know what to do here, say Y.
>  
> -endmenu # "Platform type"
> +config VECTOR
> +	bool "VECTOR support"
> +	depends on GCC_VERSION >= 120000 || CLANG_VERSION >= 130000
> +	default n
> +	help
> +	  Say N here if you want to disable all vector related procedure
> +	  in the kernel.
> +
> +	  If you don't know what to do here, say Y.
> +
> +endmenu

"VECTOR" is not really consistent to how the other configs are named;
RISCV_ISA_V, RISCV_ISA_VECTOR, RISCV_VECTOR?


Björn