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Date:   Thu, 6 Jul 2023 14:33:02 +0100
From:   Conor Dooley <conor.dooley@microchip.com>
To:     Samuel Ortiz <sameo@rivosinc.com>
CC:     Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        <linux-riscv@lists.infradead.org>, <linux@rivosinc.com>,
        Andrew Jones <ajones@ventanamicro.com>,
        Heiko Stuebner <heiko.stuebner@vrull.eu>,
        Anup Patel <apatel@ventanamicro.com>,
        <linux-kernel@vger.kernel.org>,
        "Hongren (Zenithal) Zheng" <i@zenithal.me>,
        Guo Ren <guoren@kernel.org>, Atish Patra <atishp@rivosinc.com>,
        =?iso-8859-1?Q?Bj=F6rn_T=F6pel?= <bjorn@rivosinc.com>,
        Evan Green <evan@rivosinc.com>
Subject: Re: [PATCH v2 3/3] RISC-V: Implement archrandom when Zkr is available
Message-ID: <20230706-putdown-unedited-012eafe854f6@wendy>
References: <20230628131442.3022772-1-sameo@rivosinc.com>
 <20230628131442.3022772-4-sameo@rivosinc.com>
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On Wed, Jun 28, 2023 at 03:14:35PM +0200, Samuel Ortiz wrote:
> The Zkr extension is ratified and provides 16 bits of entropy seed when
> reading the SEED CSR.
>=20
> We can implement arch_get_random_seed_longs() by doing multiple csrrw to
> that CSR and filling an unsigned long with valid entropy bits.
>=20
> Signed-off-by: Samuel Ortiz <sameo@rivosinc.com>

Acked-by: Conor Dooley <conor.dooley@microchip.com>

Cheers,
Conor.

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