From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joel Schopp Subject: Re: KVM on ARM64 Date: Thu, 7 Aug 2014 11:52:55 -0500 Message-ID: <53E3AEE7.2070500@amd.com> References: <53E0E7AE.90402@amd.com> <53E25C45.9050603@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Cc: Christoffer Dall , KVM To: Mathew Li Return-path: Received: from mail-bn1blp0187.outbound.protection.outlook.com ([207.46.163.187]:54256 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932330AbaHGQxH (ORCPT ); Thu, 7 Aug 2014 12:53:07 -0400 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: virtio will get you the best performance so why would you want to use something slower? -Joel On 08/07/2014 11:51 AM, Mathew Li wrote: > Great. VirtIO works for me. Thanks for your help folks! > > Is there is any other way to add virtual disk, more like a traditional > disk to qemu-system-aarch64? For example IDE disk or SATA disk or > maybe as a SCSI disk? > > On Wed, Aug 6, 2014 at 9:48 AM, Joel Schopp wrote: >> It turns out that after a recent rebase of my kernel and qemu to the >> latest the problem is fixed. Rather than hunt down what fixed it I'm >> just accepting the win and moving on. -smp 4 now works. >> >> -Joel >> >> On 08/06/2014 11:15 AM, Christoffer Dall wrote: >>> On Tue, Aug 5, 2014 at 4:18 PM, Joel Schopp wrote: >>>> On 08/04/2014 07:35 PM, Mathew Li wrote: >>>>> Hi, >>>>> >>>>> I have a quick question. How do we add a hard disk to the qemu ARM VM? >>>>> >>>>> I tried: >>>>> >>>>> qemu-system-aarch64 -machine virt -hda disk.img -kernel image -initrd initrd.img >>>>> >>>>> qemu-system-aarch64 -machine virt -sd disk.img -kernel image -initrd initrd.img >>>>> >>>>> qemu-system-aarch64 -machine virt -mtdblock disk.img -kernel image >>>>> -initrd initrd.img >>>>> >>>>> Nothing seems to work. I am not able to see any disk (i.e. dev/sdX) >>>>> inside guest OS. >>>> I've been running something like this: >>>> >>>> qemu-system-aarch64 -smp 1 --enable-kvm -nographic -netdev tap,id=t0,ifname=tap0,script=no,downscript=no,vhost=on -device virtio-net-device,netdev=t0,id=nic0 \ >>>> -kernel /extra/rootfs/boot/Image -drive file=/extra/rootfs.img,id=fs -device virtio-blk-device,drive=fs -m 512 -M virt -cpu host -append "console=ttyAMA0 console=ttyS0 root=/dev/vda" >>>> >>>> >>>> On my system -smp 2 or higher hangs in the guest kernel. >>> The -smp 2 hang issue is probably due to a missing PSCI v0.2 follow-up >>> patch to QEMU, you can try: >>> https://git.linaro.org/people/christoffer.dall/qemu-arm.git/shortlog/refs/heads/psci2-smp-fix >>> >>> [disclaimer: there may be a better fix somewhere on the qemu list, I >>> haven't kept track the last couple of days] >>> >>> -Christoffer