From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shannon Zhao Subject: Re: [Query] Does Linux & Qemu support KVM for ARM32 guest on ARM64 host Date: Thu, 28 Apr 2016 10:33:50 +0800 Message-ID: <5721768E.407@huawei.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org Sender: "Qemu-devel" To: r.sande@samsung.com, "kvmarm@lists.cs.columbia.edu" , qemu-arm@nongnu.org Cc: Marc Zyngier , Andre Przywara , qemu-devel@nongnu.org, "kvm@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" List-Id: kvmarm@lists.cs.columbia.edu On 2016/4/28 9:50, RAVINDRA KUMAR SANDE wrote: > > What I did : > 1) Just for investigation, I took a ARMv8 ( OdroidC2 ) board > 2) I compiled Linux 3.14 with KVM support for this ARMv8 ( OdroidC2 ) > board, with modification replacing meson_timer by arm timer in its dts > file. > Why Linux 3.14 : I took Linux 3.14 because display drivers for this > board are officially for this version; and I am interested in seeing > some Linux guest booting with display on. > 3) I see from boot log of that KVM is initialized successfully, and I > can see /dev/kvm node. > 4) I built latest Qemu with --enable-kvm on this board natively. > > What I find : > 1) running "qemu-system-arm -enable-kvm -machine vexpress-a9 ...." > gives error : no accelerator found > 2) running "qemu-system-aarch64 -enable-kvm -machine vexpress-a9 ...." > gives error : kmv_init_vcpu (IOCtl on /dev/kvm) failed, guest not supported > ( I experimented some modifications as well to overcome above error, > such as replacing value assigned to cpu->kvm_target etc, but IOCtl call > is failing) > > Query: > 1) Does Arm64 Linux not enable KVM support for Arm32 guest ? > 2) Can qemu-system-arm not use the KVM feature on Arm64 host ? > 3) Can qemu-system-aarch64 not use KVM feature for Arm32 guest ? > You can use below command to boot a ARM32 guest on ARM64： qemu-system-aarch64 -enable-kvm -machine virt,kernel_irqchip=on -cpu host,aarch64=off .... -- Shannon From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by 10.25.208.137 with SMTP id h131csp11761lfg; Wed, 27 Apr 2016 19:34:45 -0700 (PDT) X-Received: by 10.55.74.141 with SMTP id x135mr12442148qka.20.1461810885125; Wed, 27 Apr 2016 19:34:45 -0700 (PDT) Return-Path: Received: from lists.gnu.org (lists.gnu.org. [2001:4830:134:3::11]) by mx.google.com with ESMTPS id j129si3843292qkd.267.2016.04.27.19.34.44 for (version=TLS1 cipher=AES128-SHA bits=128/128); Wed, 27 Apr 2016 19:34:45 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) client-ip=2001:4830:134:3::11; Authentication-Results: mx.google.com; spf=pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) smtp.mailfrom=qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Received: from localhost ([::1]:46242 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avbmu-0001Ci-MF for alex.bennee@linaro.org; Wed, 27 Apr 2016 22:34:44 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43818) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avbmr-00019l-Gv for qemu-arm@nongnu.org; Wed, 27 Apr 2016 22:34:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1avbmm-0004XZ-HV for qemu-arm@nongnu.org; Wed, 27 Apr 2016 22:34:41 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:47604) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avbml-0004V1-PV; Wed, 27 Apr 2016 22:34:36 -0400 Received: from 172.24.1.47 (EHLO szxeml430-hub.china.huawei.com) ([172.24.1.47]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DGF69321; Thu, 28 Apr 2016 10:34:14 +0800 (CST) Received: from [127.0.0.1] (10.177.16.142) by szxeml430-hub.china.huawei.com (10.82.67.185) with Microsoft SMTP Server id 14.3.235.1; Thu, 28 Apr 2016 10:34:02 +0800 Message-ID: <5721768E.407@huawei.com> Date: Thu, 28 Apr 2016 10:33:50 +0800 From: Shannon Zhao User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: , "kvmarm@lists.cs.columbia.edu" , References: In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.177.16.142] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020204.572176A9.0120, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 18f5f7ba130adb0ce4ec2991bb4e6d38 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] X-Received-From: 119.145.14.65 Subject: Re: [Qemu-arm] [Query] Does Linux & Qemu support KVM for ARM32 guest on ARM64 host X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marc Zyngier , Andre Przywara , qemu-devel@nongnu.org, "kvm@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-arm" X-TUID: 33stsomLzcQ+ On 2016/4/28 9:50, RAVINDRA KUMAR SANDE wrote: > > What I did : > 1) Just for investigation, I took a ARMv8 ( OdroidC2 ) board > 2) I compiled Linux 3.14 with KVM support for this ARMv8 ( OdroidC2 ) > board, with modification replacing meson_timer by arm timer in its dts > file. > Why Linux 3.14 : I took Linux 3.14 because display drivers for this > board are officially for this version; and I am interested in seeing > some Linux guest booting with display on. > 3) I see from boot log of that KVM is initialized successfully, and I > can see /dev/kvm node. > 4) I built latest Qemu with --enable-kvm on this board natively. > > What I find : > 1) running "qemu-system-arm -enable-kvm -machine vexpress-a9 ...." > gives error : no accelerator found > 2) running "qemu-system-aarch64 -enable-kvm -machine vexpress-a9 ...." > gives error : kmv_init_vcpu (IOCtl on /dev/kvm) failed, guest not supported > ( I experimented some modifications as well to overcome above error, > such as replacing value assigned to cpu->kvm_target etc, but IOCtl call > is failing) > > Query: > 1) Does Arm64 Linux not enable KVM support for Arm32 guest ? > 2) Can qemu-system-arm not use the KVM feature on Arm64 host ? > 3) Can qemu-system-aarch64 not use KVM feature for Arm32 guest ? > You can use below command to boot a ARM32 guest on ARM64： qemu-system-aarch64 -enable-kvm -machine virt,kernel_irqchip=on -cpu host,aarch64=off .... -- Shannon From mboxrd@z Thu Jan 1 00:00:00 1970 From: zhaoshenglong@huawei.com (Shannon Zhao) Date: Thu, 28 Apr 2016 10:33:50 +0800 Subject: [Query] Does Linux & Qemu support KVM for ARM32 guest on ARM64 host In-Reply-To: References: Message-ID: <5721768E.407@huawei.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 2016/4/28 9:50, RAVINDRA KUMAR SANDE wrote: > > What I did : > 1) Just for investigation, I took a ARMv8 ( OdroidC2 ) board > 2) I compiled Linux 3.14 with KVM support for this ARMv8 ( OdroidC2 ) > board, with modification replacing meson_timer by arm timer in its dts > file. > Why Linux 3.14 : I took Linux 3.14 because display drivers for this > board are officially for this version; and I am interested in seeing > some Linux guest booting with display on. > 3) I see from boot log of that KVM is initialized successfully, and I > can see /dev/kvm node. > 4) I built latest Qemu with --enable-kvm on this board natively. > > What I find : > 1) running "qemu-system-arm -enable-kvm -machine vexpress-a9 ...." > gives error : no accelerator found > 2) running "qemu-system-aarch64 -enable-kvm -machine vexpress-a9 ...." > gives error : kmv_init_vcpu (IOCtl on /dev/kvm) failed, guest not supported > ( I experimented some modifications as well to overcome above error, > such as replacing value assigned to cpu->kvm_target etc, but IOCtl call > is failing) > > Query: > 1) Does Arm64 Linux not enable KVM support for Arm32 guest ? > 2) Can qemu-system-arm not use the KVM feature on Arm64 host ? > 3) Can qemu-system-aarch64 not use KVM feature for Arm32 guest ? > You can use below command to boot a ARM32 guest on ARM64? qemu-system-aarch64 -enable-kvm -machine virt,kernel_irqchip=on -cpu host,aarch64=off .... -- Shannon From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shannon Zhao Subject: Re: [Query] Does Linux & Qemu support KVM for ARM32 guest on ARM64 host Date: Thu, 28 Apr 2016 10:33:50 +0800 Message-ID: <5721768E.407@huawei.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Cc: Marc Zyngier , Andre Przywara , qemu-devel@nongnu.org, "kvm@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" To: , "kvmarm@lists.cs.columbia.edu" , Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org Sender: "Qemu-devel" List-Id: kvm.vger.kernel.org On 2016/4/28 9:50, RAVINDRA KUMAR SANDE wrote: > > What I did : > 1) Just for investigation, I took a ARMv8 ( OdroidC2 ) board > 2) I compiled Linux 3.14 with KVM support for this ARMv8 ( OdroidC2 ) > board, with modification replacing meson_timer by arm timer in its dts > file. > Why Linux 3.14 : I took Linux 3.14 because display drivers for this > board are officially for this version; and I am interested in seeing > some Linux guest booting with display on. > 3) I see from boot log of that KVM is initialized successfully, and I > can see /dev/kvm node. > 4) I built latest Qemu with --enable-kvm on this board natively. > > What I find : > 1) running "qemu-system-arm -enable-kvm -machine vexpress-a9 ...." > gives error : no accelerator found > 2) running "qemu-system-aarch64 -enable-kvm -machine vexpress-a9 ...." > gives error : kmv_init_vcpu (IOCtl on /dev/kvm) failed, guest not supported > ( I experimented some modifications as well to overcome above error, > such as replacing value assigned to cpu->kvm_target etc, but IOCtl call > is failing) > > Query: > 1) Does Arm64 Linux not enable KVM support for Arm32 guest ? > 2) Can qemu-system-arm not use the KVM feature on Arm64 host ? > 3) Can qemu-system-aarch64 not use KVM feature for Arm32 guest ? > You can use below command to boot a ARM32 guest on ARM64： qemu-system-aarch64 -enable-kvm -machine virt,kernel_irqchip=on -cpu host,aarch64=off .... -- Shannon From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43841) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avbmt-0001C0-HR for qemu-devel@nongnu.org; Wed, 27 Apr 2016 22:34:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1avbms-0004Yw-DU for qemu-devel@nongnu.org; Wed, 27 Apr 2016 22:34:43 -0400 Message-ID: <5721768E.407@huawei.com> Date: Thu, 28 Apr 2016 10:33:50 +0800 From: Shannon Zhao MIME-Version: 1.0 References: In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Subject: Re: [Qemu-devel] [Query] Does Linux & Qemu support KVM for ARM32 guest on ARM64 host List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: r.sande@samsung.com, "kvmarm@lists.cs.columbia.edu" , qemu-arm@nongnu.org Cc: "kvm@vger.kernel.org" , Marc Zyngier , Andre Przywara , qemu-devel@nongnu.org, "linux-arm-kernel@lists.infradead.org" On 2016/4/28 9:50, RAVINDRA KUMAR SANDE wrote: > > What I did : > 1) Just for investigation, I took a ARMv8 ( OdroidC2 ) board > 2) I compiled Linux 3.14 with KVM support for this ARMv8 ( OdroidC2 ) > board, with modification replacing meson_timer by arm timer in its dts > file. > Why Linux 3.14 : I took Linux 3.14 because display drivers for this > board are officially for this version; and I am interested in seeing > some Linux guest booting with display on. > 3) I see from boot log of that KVM is initialized successfully, and I > can see /dev/kvm node. > 4) I built latest Qemu with --enable-kvm on this board natively. > > What I find : > 1) running "qemu-system-arm -enable-kvm -machine vexpress-a9 ...." > gives error : no accelerator found > 2) running "qemu-system-aarch64 -enable-kvm -machine vexpress-a9 ...." > gives error : kmv_init_vcpu (IOCtl on /dev/kvm) failed, guest not supported > ( I experimented some modifications as well to overcome above error, > such as replacing value assigned to cpu->kvm_target etc, but IOCtl call > is failing) > > Query: > 1) Does Arm64 Linux not enable KVM support for Arm32 guest ? > 2) Can qemu-system-arm not use the KVM feature on Arm64 host ? > 3) Can qemu-system-aarch64 not use KVM feature for Arm32 guest ? > You can use below command to boot a ARM32 guest on ARM64： qemu-system-aarch64 -enable-kvm -machine virt,kernel_irqchip=on -cpu host,aarch64=off .... -- Shannon