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Thu, 09 Jan 2020 09:46:14 +0000 MIME-Version: 1.0 Date: Thu, 09 Jan 2020 09:46:14 +0000 From: Marc Zyngier To: Jianyong Wu Subject: Re: [RFC PATCH v9 7/8] ptp: arm64: Enable ptp_kvm for arm64 In-Reply-To: References: <20191210034026.45229-1-jianyong.wu@arm.com> <20191210034026.45229-8-jianyong.wu@arm.com> Message-ID: X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.8 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: Jianyong.Wu@arm.com, netdev@vger.kernel.org, yangbo.lu@nxp.com, john.stultz@linaro.org, tglx@linutronix.de, pbonzini@redhat.com, sean.j.christopherson@intel.com, richardcochran@gmail.com, Mark.Rutland@arm.com, will@kernel.org, Suzuki.Poulose@arm.com, Steven.Price@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, Steve.Capper@arm.com, Kaly.Xin@arm.com, Justin.He@arm.com, nd@arm.com, kvm-owner@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Cc: Justin He , kvm-owner@vger.kernel.org, kvm@vger.kernel.org, netdev@vger.kernel.org, richardcochran@gmail.com, linux-kernel@vger.kernel.org, sean.j.christopherson@intel.com, Steven Price , john.stultz@linaro.org, yangbo.lu@nxp.com, pbonzini@redhat.com, tglx@linutronix.de, nd , will@kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On 2020-01-09 09:24, Marc Zyngier wrote: > On 2020-01-09 05:59, Jianyong Wu wrote: [...] >> So we focus it on arm64. Also I have never tested it on arm32 machine >> ( we lack of arm32 machine) > > I'm sure your employer can provide you with such a box. I can probably > even tell you which cupboard they are stored in... ;-) > >> Do you think it's necessary to enable ptp_kvm on arm32? If so, I can >> do that. > > I can't see why we wouldn't, given that it should be a zero effort task > (none of the code here is arch specific). To be clear, what I'm after is support for 32bit *guests*. I don't expect any issue with a 32bit host (it's all common code), but you should be able to test 32bit guests pretty easily (most ARMv8.0 CPUs support 32bit EL1). M. -- Jazz is not dead. It just smells funny... _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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=-1.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 D01DBC32771 for ; Thu, 9 Jan 2020 09:46:20 +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 A25FF2072E for ; Thu, 9 Jan 2020 09:46:20 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Thu, 9 Jan 2020 09:46:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578563176; bh=NHHel1PVO2HlRqINTAayeLOlQXHvdSb0MKXB6GwG2Xo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=Lv9mjO62CPa1so1ZNZc7FENfSViFFVsdY2DTNxbyY0LlNLpor7G78cti04LiXbtAQ i1UplCiDuC04AomjvqZIGN5V5p177tJ+wuJY8hHksssGF7ld7YsHQULYsaCu+Rzqoe SJjCc7PRPQRTg+7rJf13faQFdPYCd31nGKHrR8L8= Received: from disco-boy.misterjones.org ([51.254.78.96] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1ipUOM-0002fn-Nv; Thu, 09 Jan 2020 09:46:14 +0000 MIME-Version: 1.0 Date: Thu, 09 Jan 2020 09:46:14 +0000 From: Marc Zyngier To: Jianyong Wu Subject: Re: [RFC PATCH v9 7/8] ptp: arm64: Enable ptp_kvm for arm64 In-Reply-To: References: <20191210034026.45229-1-jianyong.wu@arm.com> <20191210034026.45229-8-jianyong.wu@arm.com> Message-ID: X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.8 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: Jianyong.Wu@arm.com, netdev@vger.kernel.org, yangbo.lu@nxp.com, john.stultz@linaro.org, tglx@linutronix.de, pbonzini@redhat.com, sean.j.christopherson@intel.com, richardcochran@gmail.com, Mark.Rutland@arm.com, will@kernel.org, Suzuki.Poulose@arm.com, Steven.Price@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, Steve.Capper@arm.com, Kaly.Xin@arm.com, Justin.He@arm.com, nd@arm.com, kvm-owner@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200109_014617_520584_B4593CAE X-CRM114-Status: GOOD ( 10.19 ) 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: Mark Rutland , Justin He , kvm-owner@vger.kernel.org, kvm@vger.kernel.org, Suzuki Poulose , netdev@vger.kernel.org, richardcochran@gmail.com, Steve Capper , linux-kernel@vger.kernel.org, sean.j.christopherson@intel.com, Steven Price , Kaly Xin , john.stultz@linaro.org, yangbo.lu@nxp.com, pbonzini@redhat.com, tglx@linutronix.de, nd , will@kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2020-01-09 09:24, Marc Zyngier wrote: > On 2020-01-09 05:59, Jianyong Wu wrote: [...] >> So we focus it on arm64. Also I have never tested it on arm32 machine >> ( we lack of arm32 machine) > > I'm sure your employer can provide you with such a box. I can probably > even tell you which cupboard they are stored in... ;-) > >> Do you think it's necessary to enable ptp_kvm on arm32? If so, I can >> do that. > > I can't see why we wouldn't, given that it should be a zero effort task > (none of the code here is arch specific). To be clear, what I'm after is support for 32bit *guests*. I don't expect any issue with a 32bit host (it's all common code), but you should be able to test 32bit guests pretty easily (most ARMv8.0 CPUs support 32bit EL1). M. -- Jazz is not dead. It just smells funny... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 2EF21C3F68F for ; Thu, 9 Jan 2020 09:46:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0635E2075D for ; Thu, 9 Jan 2020 09:46:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578563182; bh=NHHel1PVO2HlRqINTAayeLOlQXHvdSb0MKXB6GwG2Xo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=IZRbC5YM9cTw+RDK5MyvOfhRkBL2M2CRWCPll7W893l+6ATcvWhz8TprFhzcEZGDq lgS8axdOvnVQiG4a7rGsKvq6AoBuf+IkBm8hh+26AALafASwGmziti4NWsTO81jmOf s1bnnsOvb4KVk2z3N3M7TCd6xvGoLOM9SL79n4tk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729144AbgAIJqR (ORCPT ); Thu, 9 Jan 2020 04:46:17 -0500 Received: from mail.kernel.org ([198.145.29.99]:32852 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728791AbgAIJqR (ORCPT ); Thu, 9 Jan 2020 04:46:17 -0500 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8ED0920678; Thu, 9 Jan 2020 09:46:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578563176; bh=NHHel1PVO2HlRqINTAayeLOlQXHvdSb0MKXB6GwG2Xo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=Lv9mjO62CPa1so1ZNZc7FENfSViFFVsdY2DTNxbyY0LlNLpor7G78cti04LiXbtAQ i1UplCiDuC04AomjvqZIGN5V5p177tJ+wuJY8hHksssGF7ld7YsHQULYsaCu+Rzqoe SJjCc7PRPQRTg+7rJf13faQFdPYCd31nGKHrR8L8= Received: from disco-boy.misterjones.org ([51.254.78.96] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1ipUOM-0002fn-Nv; Thu, 09 Jan 2020 09:46:14 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Thu, 09 Jan 2020 09:46:14 +0000 From: Marc Zyngier To: Jianyong Wu Cc: netdev@vger.kernel.org, yangbo.lu@nxp.com, john.stultz@linaro.org, tglx@linutronix.de, pbonzini@redhat.com, sean.j.christopherson@intel.com, richardcochran@gmail.com, Mark Rutland , will@kernel.org, Suzuki Poulose , Steven Price , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, Steve Capper , Kaly Xin , Justin He , nd , kvm-owner@vger.kernel.org Subject: Re: [RFC PATCH v9 7/8] ptp: arm64: Enable ptp_kvm for arm64 In-Reply-To: References: <20191210034026.45229-1-jianyong.wu@arm.com> <20191210034026.45229-8-jianyong.wu@arm.com> Message-ID: X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.8 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: Jianyong.Wu@arm.com, netdev@vger.kernel.org, yangbo.lu@nxp.com, john.stultz@linaro.org, tglx@linutronix.de, pbonzini@redhat.com, sean.j.christopherson@intel.com, richardcochran@gmail.com, Mark.Rutland@arm.com, will@kernel.org, Suzuki.Poulose@arm.com, Steven.Price@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, Steve.Capper@arm.com, Kaly.Xin@arm.com, Justin.He@arm.com, nd@arm.com, kvm-owner@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 2020-01-09 09:24, Marc Zyngier wrote: > On 2020-01-09 05:59, Jianyong Wu wrote: [...] >> So we focus it on arm64. Also I have never tested it on arm32 machine >> ( we lack of arm32 machine) > > I'm sure your employer can provide you with such a box. I can probably > even tell you which cupboard they are stored in... ;-) > >> Do you think it's necessary to enable ptp_kvm on arm32? If so, I can >> do that. > > I can't see why we wouldn't, given that it should be a zero effort task > (none of the code here is arch specific). To be clear, what I'm after is support for 32bit *guests*. I don't expect any issue with a 32bit host (it's all common code), but you should be able to test 32bit guests pretty easily (most ARMv8.0 CPUs support 32bit EL1). M. -- Jazz is not dead. It just smells funny...