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 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 CD4D81061B06 for ; Mon, 30 Mar 2026 14:46:52 +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=uUeLzAAwS3AKge6vRe1Y968SmW8eZYwvyvt9/B2qHxQ=; b=LYW5qxYHHQ/lIYMGD5eDePftTs j0Ua/oK47kN6z9R58eLW5XjEHwBe5CKuWZFFbZr5YLka/fU+MJ1U4UNaSuJaKa3Dz4WbUx86m7AdB M7Vr68yvmpXcdnclgUEzjUYqbWlJmf/6uZyNaB1mAHBdmeuC7PepHpYtEnhbO4oesbkzEspQjbiYi TP2I/uyktYKlU5n8bjogNNuQaeEB2E24sNZjso3UoxxFcZBdywDw5egMEjbTGsxnQi+X7Xo6q4d5n FW4/D9bWV+Vd6i/AXExC5cPMVl9cjhYSMx3I9uIfyZESrP7cbWh1606daLsaxBQM1DGP1H/DmiTeY jbJ/19EQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7DtA-0000000BS5y-49fP; Mon, 30 Mar 2026 14:46:48 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7Dt5-0000000BS47-2wZt for linux-arm-kernel@lists.infradead.org; Mon, 30 Mar 2026 14:46:44 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 0FAC544357; Mon, 30 Mar 2026 14:46:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 43AA9C4CEF7; Mon, 30 Mar 2026 14:46:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774882002; bh=5V9bXxWmYXvrmutVJY6nsrGoOdvZArmahKRGSQilrU0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=spme1y9S3UqclPAT4pHAj/Gm6PPg0wyYqc3gZigumyeUc/d4esllbb7n5apOSz0W7 P2A9/zuvpLw8qdiuoxBBkOWIxwYMBsu5n2JN0ymE6W2bHN8sm4darlB8MZcaYCGqAD f/jpBy/WQoLNNHNUqsZ1Zafq8YiD1EUd11vTkPQh1Cnvi9ILe1jHz84Og4T8Zd+sdp W8Kt1Gi5p43sia9HH64hJSZ+ycs7Til0AcqfotW07GWdGDFbiEr6jDbu5BZYEU2PJT LQHCKnBRz2yIFU4/EjF7S6NcbuWj5IxISApwEmiXM7tpHQn7+eGq0XU8dlwA9/iinB MIFNzSq+vaGgQ== From: Ard Biesheuvel To: linux-crypto@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Ard Biesheuvel , Demian Shulhan , Eric Biggers Subject: [PATCH 1/5] lib/crc: arm64: Drop unnecessary chunking logic from crc64 Date: Mon, 30 Mar 2026 16:46:32 +0200 Message-ID: <20260330144630.33026-8-ardb@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260330144630.33026-7-ardb@kernel.org> References: <20260330144630.33026-7-ardb@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1010; i=ardb@kernel.org; h=from:subject; bh=5V9bXxWmYXvrmutVJY6nsrGoOdvZArmahKRGSQilrU0=; b=owGbwMvMwCn83sBh/rljoYmMp9WSGDJP9RyXXunSke/JOvfT9e+75tWpXl72fMMKB+XX5+aly gXNEl29sWMqC4MwJ4OsmCLLTuWc7tcuou/0FSpzYOawMoEMYeDiFICJ7M1lrHfW6Gd5Wv+XK//2 jVx/ttKZC0q3JL9/+m7HP5kLy+WvKX+5wZ+844jHGdWc1XraEyOrJjDWZwmubvoim1h3Sv6OTbP AkQkVe2y2fDv8WD769aTzEZckg7N0RKue35nbpp2wMUM1a+d9AA== X-Developer-Key: i=ardb@kernel.org; a=openpgp; fpr=F43D03328115A198C90016883D200E9CA6329909 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260330_074643_776237_988E3947 X-CRM114-Status: UNSURE ( 9.60 ) X-CRM114-Notice: Please train this message. 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 On arm64, kernel mode NEON executes with preemption enabled, so there is no need to chunk the input by hand. Signed-off-by: Ard Biesheuvel --- lib/crc/arm64/crc64.h | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/lib/crc/arm64/crc64.h b/lib/crc/arm64/crc64.h index cc65abeee24c..ab052a782c07 100644 --- a/lib/crc/arm64/crc64.h +++ b/lib/crc/arm64/crc64.h @@ -16,15 +16,13 @@ static inline u64 crc64_nvme_arch(u64 crc, const u8 *p, size_t len) { if (len >= 128 && cpu_have_named_feature(PMULL) && likely(may_use_simd())) { - do { - size_t chunk = min_t(size_t, len & ~15, SZ_4K); + size_t chunk = len & ~15; - scoped_ksimd() - crc = crc64_nvme_arm64_c(crc, p, chunk); + scoped_ksimd() + crc = crc64_nvme_arm64_c(crc, p, chunk); - p += chunk; - len -= chunk; - } while (len >= 128); + p += chunk; + len &= 15; } return crc64_nvme_generic(crc, p, len); } -- 2.53.0.1018.g2bb0e51243-goog