From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0E0723254B3 for ; Mon, 30 Mar 2026 14:46:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774882003; cv=none; b=QAefJkTTBOWvxg6KEUJswEOXa0M6IXZuXG6ORT1uXDQH/C4xjCyRQVTRyVuRtS0dLfEvIKeH3UuCVkHKHmib4yOyBVspJlC1dkOboOIgQhR7JwefHL1OoITcaEPnn5LbFDtgWTG9j+MZQXnzJSAaGMymoYnN/gCGhynvPHF2te4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774882003; c=relaxed/simple; bh=5V9bXxWmYXvrmutVJY6nsrGoOdvZArmahKRGSQilrU0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YT3h+1ii7Z794Eai5LHdXY8XEpRY0qGF5bO9ZCBNzwjk03n6T33q+BSqkirboqv9K0dxCchQ4w1G6/EefxyI3PivdzhWNm4Zx0hPS+djO46gxhJnCB9J5zZu4AAkbsEvO45Dfw1kDjoPB20JIc+EPB6EoDA6ocI0BFrDXnOIqCI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=spme1y9S; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="spme1y9S" 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> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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