From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 478E3C00449 for ; Fri, 5 Oct 2018 08:14:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CABD520875 for ; Fri, 5 Oct 2018 08:14:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linaro.org header.i=@linaro.org header.b="PJcLwtVX" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CABD520875 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728614AbeJEPLg (ORCPT ); Fri, 5 Oct 2018 11:11:36 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:35454 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728581AbeJEPLa (ORCPT ); Fri, 5 Oct 2018 11:11:30 -0400 Received: by mail-wm1-f68.google.com with SMTP id e187-v6so1036453wmf.0 for ; Fri, 05 Oct 2018 01:13:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=A+1FdRMKX5kWT68MST48ZYdoIobJ5B3kYMhv71JKOAg=; b=PJcLwtVXRuyJPKWbbwJBGaYD/0+A6pH/bRN1v8Ky+MsOeDl1X8nZVqwwcKBgUCWjct PMh/eQPIxbpQRmrMSUG0NVWRyNWL60QRHPjdWY8s3j9dnprSTAVQeym8nwAdgE0Kfn39 qt/i7giQasS5aiIXOxSLGpmt7KZ1soLYUoyuA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=A+1FdRMKX5kWT68MST48ZYdoIobJ5B3kYMhv71JKOAg=; b=tluxwEiIPDSJloz+1X+IG6iOxivHJCcj7VFN3GI3k9ynxYazam65OuSDmD1tqpjFrD 5gebJftGlpeApmHmueXgA6YLtF9JNym2F31lBl4viCwjQLERmTRkb4VkDUKFewIEQ3Fs mTc1qRayiXCbguKoSCzDyAcWHc/9Fd+xCFKx2x9/S/t9vspnweixVlNdTGvSsdybj3xL M+37WceBLO/GCstMm9bUfmcJzYm+aPF0LmTCkrTAIwITLdJeGm90QPkYKvswJ6mRsaXr wcEKQZAenow33QvJfepZN0fV3NEFyqGRYFK8lxabirZYh6EbfmDWPrEQUZzr7rJFL7NE MqkQ== X-Gm-Message-State: ABuFfogglaQiDw746rUjizPb1/G/yZaL05+jdkyh9NM9AXzw0riiQoJ5 baR9nVD+s/pEQSAARAXfnWfsHrNSEVE= X-Google-Smtp-Source: ACcGV61whWAPedlj0YXt2r0zQodYfSJJwK7RNqx61OHr39dNjfuLTcFQbE9SyFx0akoRNcAg/V4cJg== X-Received: by 2002:a1c:9e8f:: with SMTP id h137-v6mr380822wme.142.1538727232789; Fri, 05 Oct 2018 01:13:52 -0700 (PDT) Received: from localhost.localdomain ([2a01:cb1d:112:6f00:697e:67d9:a05d:22c7]) by smtp.gmail.com with ESMTPSA id t4-v6sm6565620wrb.45.2018.10.05.01.13.51 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 05 Oct 2018 01:13:52 -0700 (PDT) From: Ard Biesheuvel To: linux-kernel@vger.kernel.org Cc: Ard Biesheuvel , "Jason A . Donenfeld" , Eric Biggers , Samuel Neves , Andy Lutomirski , Arnd Bergmann , Herbert Xu , "David S. Miller" , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Thomas Gleixner , Ingo Molnar , Kees Cook , "Martin K. Petersen" , Greg Kroah-Hartman , Andrew Morton , Richard Weinberger , Peter Zijlstra , linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org Subject: [RFC PATCH 9/9] crypto: crc-t10dif/x86 - move PMULL based code into core library Date: Fri, 5 Oct 2018 10:13:33 +0200 Message-Id: <20181005081333.15018-10-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20181005081333.15018-1-ard.biesheuvel@linaro.org> References: <20181005081333.15018-1-ard.biesheuvel@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Move the PMULL based routines out of the crypto API into the core CRC-T10DIF library. Signed-off-by: Ard Biesheuvel --- arch/x86/crypto/crct10dif-pclmul_glue.c | 98 +++----------------- 1 file changed, 13 insertions(+), 85 deletions(-) diff --git a/arch/x86/crypto/crct10dif-pclmul_glue.c b/arch/x86/crypto/crct10dif-pclmul_glue.c index cd4df9322501..47f0017ad7f3 100644 --- a/arch/x86/crypto/crct10dif-pclmul_glue.c +++ b/arch/x86/crypto/crct10dif-pclmul_glue.c @@ -25,7 +25,7 @@ #include #include #include -#include +#include #include #include #include @@ -36,90 +36,17 @@ asmlinkage __u16 crc_t10dif_pcl(__u16 crc, const unsigned char *buf, size_t len); -struct chksum_desc_ctx { - __u16 crc; -}; - -/* - * Steps through buffer one byte at at time, calculates reflected - * crc using table. - */ - -static int chksum_init(struct shash_desc *desc) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - ctx->crc = 0; - - return 0; -} - -static int chksum_update(struct shash_desc *desc, const u8 *data, - unsigned int length) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - if (irq_fpu_usable()) { - kernel_fpu_begin(); - ctx->crc = crc_t10dif_pcl(ctx->crc, data, length); - kernel_fpu_end(); - } else - ctx->crc = crc_t10dif_generic(ctx->crc, data, length); - return 0; -} - -static int chksum_final(struct shash_desc *desc, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - *(__u16 *)out = ctx->crc; - return 0; -} - -static int __chksum_finup(__u16 *crcp, const u8 *data, unsigned int len, - u8 *out) +static __u16 crct10dif_update_x86(__u16 crc, const u8 *data, unsigned int length) { if (irq_fpu_usable()) { kernel_fpu_begin(); - *(__u16 *)out = crc_t10dif_pcl(*crcp, data, len); + crc = crc_t10dif_pcl(crc, data, length); kernel_fpu_end(); - } else - *(__u16 *)out = crc_t10dif_generic(*crcp, data, len); - return 0; -} - -static int chksum_finup(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - return __chksum_finup(&ctx->crc, data, len, out); -} - -static int chksum_digest(struct shash_desc *desc, const u8 *data, - unsigned int length, u8 *out) -{ - struct chksum_desc_ctx *ctx = shash_desc_ctx(desc); - - return __chksum_finup(&ctx->crc, data, length, out); -} - -static struct shash_alg alg = { - .digestsize = CRC_T10DIF_DIGEST_SIZE, - .init = chksum_init, - .update = chksum_update, - .final = chksum_final, - .finup = chksum_finup, - .digest = chksum_digest, - .descsize = sizeof(struct chksum_desc_ctx), - .base = { - .cra_name = "crct10dif", - .cra_driver_name = "crct10dif-pclmul", - .cra_priority = 200, - .cra_blocksize = CRC_T10DIF_BLOCK_SIZE, - .cra_module = THIS_MODULE, + } else { + crc = crc_t10dif_generic(crc, data, length); } -}; + return crc; +} static const struct x86_cpu_id crct10dif_cpu_id[] = { X86_FEATURE_MATCH(X86_FEATURE_PCLMULQDQ), @@ -132,12 +59,16 @@ static int __init crct10dif_intel_mod_init(void) if (!x86_match_cpu(crct10dif_cpu_id)) return -ENODEV; - return crypto_register_shash(&alg); + SET_FFP(crc_t10dif_update_arch, crct10dif_update_x86); + + return 0; } static void __exit crct10dif_intel_mod_fini(void) { - crypto_unregister_shash(&alg); + RESET_FFP(crc_t10dif_update_arch); + /* wait for all users to switch back to the old version */ + synchronize_rcu(); } module_init(crct10dif_intel_mod_init); @@ -146,6 +77,3 @@ module_exit(crct10dif_intel_mod_fini); MODULE_AUTHOR("Tim Chen "); MODULE_DESCRIPTION("T10 DIF CRC calculation accelerated with PCLMULQDQ."); MODULE_LICENSE("GPL"); - -MODULE_ALIAS_CRYPTO("crct10dif"); -MODULE_ALIAS_CRYPTO("crct10dif-pclmul"); -- 2.11.0