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=-6.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,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 751FBC63793 for ; Thu, 22 Jul 2021 15:24:11 +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 347C86128D for ; Thu, 22 Jul 2021 15:24:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 347C86128D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:Cc:To:Subject:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=T6JZkT+eVohY8SctNSJR1s+Cykdte1JwdGMvzq4Ol2g=; b=WS1vDx6Z9yTIqf2zXVAmmIi9Ni qvaO8YNoy8Ida65U5NqV3d7O/Djm6j9sMXtwYB/0R/iLZW+NyxRVL3abj9rwDoFZxDZGa6L+Ev946 FCzbOOovAkdXbFnUqtU5bkeKf4OGSuD9HgbdrKXO+NfYn02gUR/1NsHVEE9w+Bv1fmUg5jSe1et2f SB618vc+ckLHt+T0dwwmhabsgtvPd6QN18IMCtSVXm6yIFcrxGztBhK5F5YhjvHQ7poobgUf+y8aw aWSedmhK9bl+eSjQsH5V2PGmJljbwax0eeDc42AqGEtaqe9xD394dDibC/p/3KSlBrDuji7mrqyvD 3uRL1n5w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m6aWz-001yc2-O0; Thu, 22 Jul 2021 15:22:37 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m6aWv-001ybW-T7 for linux-arm-kernel@lists.infradead.org; Thu, 22 Jul 2021 15:22:35 +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 BCA88106F; Thu, 22 Jul 2021 08:22:28 -0700 (PDT) Received: from [10.57.7.91] (unknown [10.57.7.91]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6E3563F694; Thu, 22 Jul 2021 08:22:27 -0700 (PDT) Subject: Re: [PATCH v2 3/3] kvm/arm: Align the VMID allocation with the arm64 ASID one To: Will Deacon , Shameerali Kolothum Thodi Cc: "jean-philippe@linaro.org" , "maz@kernel.org" , "linux-kernel@vger.kernel.org" , Linuxarm , "catalin.marinas@arm.com" , "kvmarm@lists.cs.columbia.edu" , "linux-arm-kernel@lists.infradead.org" References: <20210616155606.2806-1-shameerali.kolothum.thodi@huawei.com> <20210616155606.2806-4-shameerali.kolothum.thodi@huawei.com> <20210721163138.GD11003@willie-the-truck> <20210722095010.GA12012@willie-the-truck> From: Vladimir Murzin Message-ID: <43b32e77-52b1-8524-63a1-c99578c2dd1d@arm.com> Date: Thu, 22 Jul 2021 16:22:26 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20210722095010.GA12012@willie-the-truck> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210722_082234_041560_DA7787A8 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 7/22/21 10:50 AM, Will Deacon wrote: > As an aside: I'm more and more inclined to rip out the CnP stuff given > that it doesn't appear to being any benefits, but does have some clear > downsides. Perhaps something for next week. Can you please clarify what do you mean by "it doesn't appear to being any benefits"? IIRC, Cortex-A65 implements CnP hint and I've heard that some payloads seen improvement... Cheers Vladimir _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel