From nobody Wed Sep 10 02:04:14 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 39739C7EE2E for ; Tue, 28 Feb 2023 00:06:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230166AbjB1AGQ (ORCPT ); Mon, 27 Feb 2023 19:06:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35978 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229972AbjB1AF4 (ORCPT ); Mon, 27 Feb 2023 19:05:56 -0500 Received: from gloria.sntech.de (gloria.sntech.de [185.11.138.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A89224CBF for ; Mon, 27 Feb 2023 16:05:54 -0800 (PST) Received: from ip5b412258.dynamic.kabel-deutschland.de ([91.65.34.88] helo=phil.lan) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1pWnV9-000552-Qd; Tue, 28 Feb 2023 01:05:51 +0100 From: Heiko Stuebner To: palmer@rivosinc.com Cc: greentime.hu@sifive.com, conor@kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, christoph.muellner@vrull.eu, heiko@sntech.de, Heiko Stuebner Subject: [PATCH RFC v2 08/16] RISC-V: add vector crypto extension detection Date: Tue, 28 Feb 2023 01:05:36 +0100 Message-Id: <20230228000544.2234136-9-heiko@sntech.de> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230228000544.2234136-1-heiko@sntech.de> References: <20230228000544.2234136-1-heiko@sntech.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Heiko Stuebner Add detection for some extensions of the vector-crypto specification, namely - Zvkb: Vector Bit-manipulation used in Cryptography - Zvkg: Vector GCM/GMAC - Zvknha and Zvknhb: NIST Algorithm Suite - Zvkns: AES-128, AES-256 Single Round Suite - Zvksed: ShangMi Algorithm Suite - Zvksh: ShangMi Algorithm Suite As their use is very specific and will likely be limited to special places we expect current code to just pre-encode those instructions, so right now we don't introduce toolchain requirements. Signed-off-by: Heiko Stuebner --- arch/riscv/include/asm/hwcap.h | 7 +++++++ arch/riscv/kernel/cpu.c | 7 +++++++ arch/riscv/kernel/cpufeature.c | 7 +++++++ 3 files changed, 21 insertions(+) diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h index 23427b9ed1e6..3701032a4df5 100644 --- a/arch/riscv/include/asm/hwcap.h +++ b/arch/riscv/include/asm/hwcap.h @@ -64,6 +64,13 @@ enum riscv_isa_ext_id { RISCV_ISA_EXT_ZBKB, RISCV_ISA_EXT_ZICBOM, RISCV_ISA_EXT_ZIHINTPAUSE, + RISCV_ISA_EXT_ZVKB, + RISCV_ISA_EXT_ZVKG, + RISCV_ISA_EXT_ZVKNED, + RISCV_ISA_EXT_ZVKNHA, + RISCV_ISA_EXT_ZVKNHB, + RISCV_ISA_EXT_ZVKSED, + RISCV_ISA_EXT_ZVKSH, RISCV_ISA_EXT_ID_MAX }; static_assert(RISCV_ISA_EXT_ID_MAX <=3D RISCV_ISA_EXT_MAX); diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c index 6f65aac68018..c01e6673a947 100644 --- a/arch/riscv/kernel/cpu.c +++ b/arch/riscv/kernel/cpu.c @@ -190,6 +190,13 @@ static struct riscv_isa_ext_data isa_ext_arr[] =3D { __RISCV_ISA_EXT_DATA(zbb, RISCV_ISA_EXT_ZBB), __RISCV_ISA_EXT_DATA(zbc, RISCV_ISA_EXT_ZBC), __RISCV_ISA_EXT_DATA(zbkb, RISCV_ISA_EXT_ZBKB), + __RISCV_ISA_EXT_DATA(zvkb, RISCV_ISA_EXT_ZVKB), + __RISCV_ISA_EXT_DATA(zvkg, RISCV_ISA_EXT_ZVKG), + __RISCV_ISA_EXT_DATA(zvkned, RISCV_ISA_EXT_ZVKNED), + __RISCV_ISA_EXT_DATA(zvknha, RISCV_ISA_EXT_ZVKNHA), + __RISCV_ISA_EXT_DATA(zvknhb, RISCV_ISA_EXT_ZVKNHB), + __RISCV_ISA_EXT_DATA(zvksed, RISCV_ISA_EXT_ZVKSED), + __RISCV_ISA_EXT_DATA(zvksh, RISCV_ISA_EXT_ZVKSH), __RISCV_ISA_EXT_DATA(sscofpmf, RISCV_ISA_EXT_SSCOFPMF), __RISCV_ISA_EXT_DATA(sstc, RISCV_ISA_EXT_SSTC), __RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL), diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 8f5434993128..4971008fa1fa 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -238,6 +238,13 @@ void __init riscv_fill_hwcap(void) SET_ISA_EXT_MAP("zbkb", RISCV_ISA_EXT_ZBKB); SET_ISA_EXT_MAP("zicbom", RISCV_ISA_EXT_ZICBOM); SET_ISA_EXT_MAP("zihintpause", RISCV_ISA_EXT_ZIHINTPAUSE); + SET_ISA_EXT_MAP("zvkb", RISCV_ISA_EXT_ZVKB); + SET_ISA_EXT_MAP("zvkg", RISCV_ISA_EXT_ZVKG); + SET_ISA_EXT_MAP("zvkned", RISCV_ISA_EXT_ZVKNED); + SET_ISA_EXT_MAP("zvknha", RISCV_ISA_EXT_ZVKNHA); + SET_ISA_EXT_MAP("zvknhb", RISCV_ISA_EXT_ZVKNHB); + SET_ISA_EXT_MAP("zvksed", RISCV_ISA_EXT_ZVKSED); + SET_ISA_EXT_MAP("zvksh", RISCV_ISA_EXT_ZVKSH); } #undef SET_ISA_EXT_MAP } --=20 2.39.0