From patchwork Mon Dec 19 22:02:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Elliott, Robert \(Servers\)" X-Patchwork-Id: 635188 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 B0C63C10F1D for ; Mon, 19 Dec 2022 22:03:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232693AbiLSWDi (ORCPT ); Mon, 19 Dec 2022 17:03:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60762 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232853AbiLSWDU (ORCPT ); Mon, 19 Dec 2022 17:03:20 -0500 Received: from mx0a-002e3701.pphosted.com (mx0a-002e3701.pphosted.com [148.163.147.86]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 99A87140C9; Mon, 19 Dec 2022 14:03:19 -0800 (PST) Received: from pps.filterd (m0134422.ppops.net [127.0.0.1]) by mx0b-002e3701.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2BJL1wCX003253; Mon, 19 Dec 2022 22:02:55 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hpe.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pps0720; bh=v7bR1szvHVL/RPr0ZNg3zP1MrZYuBcDYIV4Z7L2T914=; b=ONkH+4LS7SXoAXohpr8SBsVPGhgEtOKMi2uiTZ/y20e/Do1S5koY8UmDXOn3lCXox5Gn so3QBUWBG47i6BhCiN1h9GBDOunOEmqQBNWLC4fVDMmZXYbsS4f75dGWSMnEYgyh7vzQ NlR9wRg+i+GW4T+IoGPEXc94OdVPr4bbNuEabW8S6Y6ggDc42r+GRaCCARK0+v67mXCv qygtL8Ok8JtwYw2oFH+YXQdb/ClYASd/ORpDCqkqSSBgxLRPGV23lOu384M0WACUnMbN jB/1ECLjBKvuYhLZ+1EsHtqIWonj1zY4LmsHc4WdNSXYQdhmGOC6XnpXIuA0XRNLaQRt cg== Received: from p1lg14878.it.hpe.com (p1lg14878.it.hpe.com [16.230.97.204]) by mx0b-002e3701.pphosted.com (PPS) with ESMTPS id 3mjyd9rcn4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 Dec 2022 22:02:55 +0000 Received: from p1lg14885.dc01.its.hpecorp.net (unknown [10.119.18.236]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by p1lg14878.it.hpe.com (Postfix) with ESMTPS id AF7183DE2E; Mon, 19 Dec 2022 22:02:54 +0000 (UTC) Received: from adevxp033-sys.us.rdlabs.hpecorp.net (unknown [16.231.227.36]) by p1lg14885.dc01.its.hpecorp.net (Postfix) with ESMTP id E37DB80649A; Mon, 19 Dec 2022 22:02:53 +0000 (UTC) From: Robert Elliott To: herbert@gondor.apana.org.au, davem@davemloft.net, Jason@zx2c4.com, ardb@kernel.org, ap420073@gmail.com, David.Laight@ACULAB.COM, ebiggers@kernel.org, tim.c.chen@linux.intel.com, peter@n8pjl.ca, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com Cc: linux-crypto@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, Robert Elliott Subject: [PATCH 07/13] crypto: x86/ghash - restructure FPU context saving Date: Mon, 19 Dec 2022 16:02:17 -0600 Message-Id: <20221219220223.3982176-8-elliott@hpe.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221219220223.3982176-1-elliott@hpe.com> References: <20221219220223.3982176-1-elliott@hpe.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: wEAm2iiXTf33vjlVf3B3bGIxapDJMGAh X-Proofpoint-GUID: wEAm2iiXTf33vjlVf3B3bGIxapDJMGAh X-HPE-SCL: -1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-12-19_01,2022-12-15_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxlogscore=999 clxscore=1015 bulkscore=0 adultscore=0 malwarescore=0 spamscore=0 impostorscore=0 mlxscore=0 lowpriorityscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2212190193 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Wrap each of the calls to clmul_hash_update and clmul_ghash__mul in its own set of kernel_fpu_begin and kernel_fpu_end calls, preparing to limit the amount of data processed by each _update call to avoid RCU stalls. This is more like how polyval-clmulni_glue is structured. Fixes: 0e1227d356e9 ("crypto: ghash - Add PCLMULQDQ accelerated implementation") Suggested-by: Herbert Xu Signed-off-by: Robert Elliott --- arch/x86/crypto/ghash-clmulni-intel_glue.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/x86/crypto/ghash-clmulni-intel_glue.c b/arch/x86/crypto/ghash-clmulni-intel_glue.c index beac4b2eddf6..1bfde099de0f 100644 --- a/arch/x86/crypto/ghash-clmulni-intel_glue.c +++ b/arch/x86/crypto/ghash-clmulni-intel_glue.c @@ -80,7 +80,6 @@ static int ghash_update(struct shash_desc *desc, struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm); u8 *dst = dctx->buffer; - kernel_fpu_begin(); if (dctx->bytes) { int n = min(srclen, dctx->bytes); u8 *pos = dst + (GHASH_BLOCK_SIZE - dctx->bytes); @@ -91,10 +90,14 @@ static int ghash_update(struct shash_desc *desc, while (n--) *pos++ ^= *src++; - if (!dctx->bytes) + if (!dctx->bytes) { + kernel_fpu_begin(); clmul_ghash_mul(dst, &ctx->shash); + kernel_fpu_end(); + } } + kernel_fpu_begin(); clmul_ghash_update(dst, src, srclen, &ctx->shash); kernel_fpu_end();