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From:   Heiko Stuebner <heiko.stuebner@vrull.eu>
To:     Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        linux-riscv@lists.infradead.org
Cc:     "Hongren (Zenithal) Zheng" <i@zenithal.me>, linux@rivosinc.com,
        Conor Dooley <conor.dooley@microchip.com>,
        Andrew Jones <ajones@ventanamicro.com>,
        Anup Patel <apatel@ventanamicro.com>,
        linux-kernel@vger.kernel.org, Guo Ren <guoren@kernel.org>,
        Atish Patra <atishp@rivosinc.com>,
        Samuel Ortiz <sameo@rivosinc.com>,
        =?ISO-8859-1?Q?Bj=F6rn_T=F6pel?= <bjorn@rivosinc.com>,
        Evan Green <evan@rivosinc.com>,
        Jiatai He <jiatai2021@iscas.ac.cn>,
        Samuel Ortiz <sameo@rivosinc.com>
Subject: Re: [PATCH v2 1/3] RISC-V: add Bitmanip/Scalar Crypto parsing from DT
Date:   Sun, 09 Jul 2023 13:30:43 +0200
Message-ID: <7542713.EvYhyI6sBW@phil>
In-Reply-To: <20230628131442.3022772-2-sameo@rivosinc.com>
References: <20230628131442.3022772-1-sameo@rivosinc.com>
 <20230628131442.3022772-2-sameo@rivosinc.com>
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Am Mittwoch, 28. Juni 2023, 15:14:33 CEST schrieb Samuel Ortiz:
> From: "Hongren (Zenithal) Zheng" <i@zenithal.me>
> 
> Parse Zb/Zk related string from DT and output them to cpuinfo.
> 
> It is worth noting that the Scalar Crypto extension defines "zk" as a
> shorthand for the Zkn, Zkr and Zkt extensions. Since the Zkn one also
> implies the Zbkb, Zbkc and Zbkx extensions, simply passing the valid
> "zk" extension name through a DT will enable all of the  Zbkb, Zbkc,
> Zbkx, Zkn, Zkr and Zkt extensions.
> 
> Also, since there currently is no mechanism to merge all enabled
> extensions, the generated cpuinfo output could be relatively large.
> For example, setting the "riscv,isa" DT property to "rv64imafdc_zk_zks"
> will generate the following cpuinfo output:
> "rv64imafdc_zbkb_zbkc_zbkx_zknd_zkne_zknh_zkr_zksed_zksh_zkt".
> 
> Tested-by: Jiatai He <jiatai2021@iscas.ac.cn>
> Signed-off-by: Samuel Ortiz <sameo@rivosinc.com>
> Signed-off-by: Hongren (Zenithal) Zheng <i@zenithal.me>

Reviewed-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Tested-by: Heiko Stuebner <heiko.stuebner@vrull.eu>