From patchwork Sun Nov 17 00:22:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 13877768 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C573BD68BFA for ; Sun, 17 Nov 2024 00:26:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=nulWKMnEXoWZUMSUrZco9XdRO+pd5CWpNIFDDWv+NDk=; b=CODUFIALI84Edw/znGhi8TUDIP tbOjTFVmG41CMqtQuPN2QlFwHQ/CETlSkmXEBTRhzX1Yc1IL/gf7nrE3ItfOnCjWeGxrUC3JjBLTs 6rxLvq5N4q2EOyOzL4Co8ytJSocTObbLeIZRHDbycpdyk4+aeJdyjpIzW2eLxXBs645Rov5UMbbIS ea6T5uDxeCMmjxVzuNm9oR40dviSwUE1mWISO8F0uO3T97XNn4FYi5PGwOEqmKJiTt62QW1LlQ/5/ FiBxtNlP6B3gw6V4Qmtz8SLmX5FeCcFjcBqrUC8UZxabVP9GMdz0eGBEuhYGIr8IFNXPpy9N+4ImF CKTshPkA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tCT7n-00000006auV-3Rn3; Sun, 17 Nov 2024 00:26:47 +0000 Received: from nyc.source.kernel.org ([147.75.193.91]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tCT51-00000006Zr4-3nGv for linux-arm-kernel@lists.infradead.org; Sun, 17 Nov 2024 00:23:58 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 173A3A40C01; Sun, 17 Nov 2024 00:22:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2EC2CC4CEDB; Sun, 17 Nov 2024 00:23:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1731803034; bh=SOmKtc1U+Cth3ARmtiU8OIUv0APQu6lfcmWi1oOE0T4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ae3xjGCtOs/y/2IA9+TlSWBoIoshQQNPXgr0SgZ3f/r3v0tK6ppp+TNKKkk5FhMaW fzhPJxnAGNYoXtldO4TD34DmtPZGZJVe6afCKZa77lMI67XEvqDcdJsy/eOf4UQzu+ UWMfcIvzW7ZZUSkslybJsRHzXpnJ9NwfZeU9Hl8H24dX7fea6Wx8fkBvKzt0IJevAp +Oa1FxY9qXH1f+iivqzfVTgaHpriJPKUjS8BHISYZq/3g2CZr3mrS7oCMW9kzxxkPJ jiuDIbfYJj5EPXDpkPR8PqnoUcYxPOZMjuZXUqo2eVxc9uVn3W3IGA73Qbdf+fCtM+ kIcqazZYknmnw== From: Eric Biggers To: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, Zhihang Shao , Ard Biesheuvel Subject: [PATCH 02/11] lib/crc-t10dif: add support for arch overrides Date: Sat, 16 Nov 2024 16:22:35 -0800 Message-ID: <20241117002244.105200-3-ebiggers@kernel.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241117002244.105200-1-ebiggers@kernel.org> References: <20241117002244.105200-1-ebiggers@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241116_162356_143104_73F39B51 X-CRM114-Status: GOOD ( 13.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Eric Biggers Following what was done for CRC32, add support for architecture-specific override of the CRC-T10DIF library. This will allow the CRC-T10DIF library functions to access architecture-optimized code directly. Signed-off-by: Eric Biggers --- include/linux/crc-t10dif.h | 12 ++++++++++++ lib/Kconfig | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 44 insertions(+) diff --git a/include/linux/crc-t10dif.h b/include/linux/crc-t10dif.h index 206ba2305483..16787c1cee21 100644 --- a/include/linux/crc-t10dif.h +++ b/include/linux/crc-t10dif.h @@ -5,18 +5,30 @@ #include #define CRC_T10DIF_DIGEST_SIZE 2 #define CRC_T10DIF_BLOCK_SIZE 1 +u16 crc_t10dif_arch(u16 crc, const u8 *p, size_t len); u16 crc_t10dif_generic(u16 crc, const u8 *p, size_t len); static inline u16 crc_t10dif_update(u16 crc, const u8 *p, size_t len) { + if (IS_ENABLED(CONFIG_CRC_T10DIF_ARCH)) + return crc_t10dif_arch(crc, p, len); return crc_t10dif_generic(crc, p, len); } static inline u16 crc_t10dif(const u8 *p, size_t len) { return crc_t10dif_update(0, p, len); } +#if IS_ENABLED(CONFIG_CRC_T10DIF_ARCH) +bool crc_t10dif_is_optimized(void); +#else +static inline bool crc_t10dif_is_optimized(void) +{ + return false; +} +#endif + #endif diff --git a/lib/Kconfig b/lib/Kconfig index eb6c7a023be9..b84aa06ade30 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -147,10 +147,42 @@ config CRC_T10DIF help This option is only needed if a module that's not in the kernel tree needs to calculate CRC checks for use with the SCSI data integrity subsystem. +config ARCH_HAS_CRC_T10DIF + bool + +choice + prompt "CRC-T10DIF implementation" + depends on CRC_T10DIF + default CRC_T10DIF_IMPL_ARCH if ARCH_HAS_CRC_T10DIF + default CRC_T10DIF_IMPL_GENERIC if !ARCH_HAS_CRC_T10DIF + help + This option allows you to override the default choice of CRC-T10DIF + implementation. + +config CRC_T10DIF_IMPL_ARCH + bool "Architecture-optimized" if ARCH_HAS_CRC_T10DIF + help + Use the optimized implementation of CRC-T10DIF for the selected + architecture. It is recommended to keep this enabled, as it can + greatly improve CRC-T10DIF performance. + +config CRC_T10DIF_IMPL_GENERIC + bool "Generic implementation" + help + Use the generic table-based implementation of CRC-T10DIF. Selecting + this will reduce code size slightly but can greatly reduce CRC-T10DIF + performance. + +endchoice + +config CRC_T10DIF_ARCH + tristate + default CRC_T10DIF if CRC_T10DIF_IMPL_ARCH + config CRC64_ROCKSOFT tristate "CRC calculation for the Rocksoft model CRC64" select CRC64 select CRYPTO select CRYPTO_CRC64_ROCKSOFT