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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 4C72AC3A589 for ; Thu, 15 Aug 2019 16:46:24 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 1D9B1206C1 for ; Thu, 15 Aug 2019 16:46:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="lDNbpARV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1D9B1206C1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=fQgfAjMrWcENf1j8TfqPa1FWMXKKMm7iNKITFLMBoH4=; b=lDNbpARVVxAyEA uwP1ccrf8Ta1zJb2dX6QRvjNOErmr4q24PtgFMB1isid92BXUbTk0WLuMiqnEYfvDvyTz5mPCozHN qlByuSyFfev+mzjEA/ZURqQnViorFKB+BYUUitolLWnDAfnf5l82Z4uc2C0h7TEZQ1Z6Y/Gt1rPgd joq5pmS4TzcUhucIqZJALDenyEgPJNTtEgrIjjJbFzEmsqxKMrol0wXTnP9qjzCyiBCWLI6k+mhyx WkTGK44RFSMKA5UM2/PKFj43h8OPLm7s4xpVowbiL8WJSsymiVnLue1N45LHnWVsyBUpvNhj6Zhh+ p5/2Lh0Dl/ask6OkLubg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hyItL-0001SW-Ch; Thu, 15 Aug 2019 16:46:23 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hyItE-0001S1-0S for linux-arm-kernel@lists.infradead.org; Thu, 15 Aug 2019 16:46:21 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 61DE0360; Thu, 15 Aug 2019 09:46:12 -0700 (PDT) Received: from fuggles.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 444BB3F706; Thu, 15 Aug 2019 09:46:11 -0700 (PDT) Date: Thu, 15 Aug 2019 17:46:09 +0100 From: Will Deacon To: Zhangshaokun Subject: Re: [PATCH] arm64: do_csum: implement accelerated scalar version Message-ID: <20190815164609.GI2015@fuggles.cambridge.arm.com> References: <20190218230842.11448-1-ard.biesheuvel@linaro.org> <20190412095243.GA27193@fuggles.cambridge.arm.com> <41b30c72-c1c5-14b2-b2e1-3507d552830d@arm.com> <20190515094704.GC24357@fuggles.cambridge.arm.com> <440eb674-0e59-a97e-4a90-0026e2327069@hisilicon.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <440eb674-0e59-a97e-4a90-0026e2327069@hisilicon.com> User-Agent: Mutt/1.11.1+86 (6f28e57d73f2) () X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190815_094616_098108_C3AF9463 X-CRM114-Status: GOOD ( 14.37 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ard Biesheuvel , netdev@vger.kernel.org, ilias.apalodimas@linaro.org, "huanglingyan \(A\)" , Robin Murphy , linux-arm-kernel@lists.infradead.org, steve.capper@arm.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, May 16, 2019 at 11:14:35AM +0800, Zhangshaokun wrote: > On 2019/5/15 17:47, Will Deacon wrote: > > On Mon, Apr 15, 2019 at 07:18:22PM +0100, Robin Murphy wrote: > >> On 12/04/2019 10:52, Will Deacon wrote: > >>> I'm waiting for Robin to come back with numbers for a C implementation. > >>> > >>> Robin -- did you get anywhere with that? > >> > >> Still not what I would call finished, but where I've got so far (besides an > >> increasingly elaborate test rig) is as below - it still wants some unrolling > >> in the middle to really fly (and actual testing on BE), but the worst-case > >> performance already equals or just beats this asm version on Cortex-A53 with > >> GCC 7 (by virtue of being alignment-insensitive and branchless except for > >> the loop). Unfortunately, the advantage of C code being instrumentable does > >> also come around to bite me... > > > > Is there any interest from anybody in spinning a proper patch out of this? > > Shaokun? > > HiSilicon's Kunpeng920(Hi1620) benefits from do_csum optimization, if Ard and > Robin are ok, Lingyan or I can try to do it. > Of course, if any guy posts the patch, we are happy to test it. > Any will be ok. I don't mind who posts it, but Robin is super busy with SMMU stuff at the moment so it probably makes more sense for you or Lingyan to do it. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel