linux-kernel - Re: [PATCH v1] RISC-V: clarify what some RISCV

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Message-ID: <979139a9-3f87-4c42-8849-4909311f0891@sifive.com>
Date: Thu, 18 Apr 2024 17:18:55 -0500
From: Samuel Holland <samuel.holland@...ive.com>
To: Conor Dooley <conor@...nel.org>
Cc: Conor Dooley <conor.dooley@...rochip.com>,
 Björn Töpel <bjorn@...osinc.com>,
 Pu Lehui <pulehui@...weicloud.com>, Björn Töpel
 <bjorn@...nel.org>, Paul Walmsley <paul.walmsley@...ive.com>,
 Palmer Dabbelt <palmer@...belt.com>, linux-kernel@...r.kernel.org,
 linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v1] RISC-V: clarify what some RISCV_ISA* config options do

On 2024-04-18 9:21 AM, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@...rochip.com>
> 
> During some discussion on IRC yesterday and on Pu's bpf patch [1]
> I noticed that these RISCV_ISA* Kconfig options are not really clear
> about their implications. Many of these options have no impact on what
> userspace is allowed to do, for example an application can use Zbb
> regardless of whether or not the kernel does. Change the help text to
> try and clarify whether or not an option affects just the kernel, or
> also userspace. None of these options actually control whether or not an
> extension is detected dynamically as that's done regardless of Kconfig
> options, so drop any text that implies the option is required for
> dynamic detection, rewording them as "do x when y is detected".
> 
> Link: https://lore.kernel.org/linux-riscv/20240328-ferocity-repose-c554f75a676c@spud/ [1]
> Reviewed-by: Björn Töpel <bjorn@...osinc.com>
> Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
> ---
> 
> Vector copy-paste-o fixed, correct spelling of optimisations kept.
> 
> CC: Samuel Holland <samuel.holland@...ive.com>
> CC: Pu Lehui <pulehui@...weicloud.com>
> CC: Björn Töpel <bjorn@...nel.org>
> CC: Paul Walmsley <paul.walmsley@...ive.com>
> CC: Palmer Dabbelt <palmer@...belt.com>
> CC: linux-riscv@...ts.infradead.org
> CC: linux-kernel@...r.kernel.org
> ---
>  arch/riscv/Kconfig | 28 +++++++++++++++-------------
>  1 file changed, 15 insertions(+), 13 deletions(-)

Reviewed-by: Samuel Holland <samuel.holland@...ive.com>