用qemu-system-aarch64起Linux虚拟机

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本文介绍如何使用 QEMU 进行 aarch64 架构的系统仿真。首先通过 apt-get 安装 qemu，然后下载预构建的 build-root kernel 镜像，并使用 qemu-system-aarch64 启动虚拟机。文章还提供了构建 QEMU 的详细步骤及所需依赖。

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第一步：安装qemu

apt-get -y qemu

第二步：下载build-root kernel镜像，并用qemu-system-aarch64 起虚拟机

wget http://people.linaro.org/~alex.bennee/images/aarch64-linux-3.15rc2-buildroot.img
qemu-system-aarch64 -machine virt -cpu cortex-a57 -machine type=virt -nographic -smp 1 -m 2048 -kernel aarch64-linux-3.15rc2-buildroot.img  --append "console=ttyAMA0"

来源：

Running Linux in QEMU’s aarch64 system emulation mode

Posted by Alex on 9 May 2014, 1:14 pm

Since I started working on aarch64 support for QEMU the most frequently asked question I got was “when can I run aarch64 system emulation on QEMU?”. Well wait no more as support for a VIRT-IO based aarch64 board was recently merged into the master branch of QEMU. In this post I’ll talk about building QEMU, a rootfs and a kernel that will allow you to start experimenting with the architecture.

Quick start

Let’s first start with building and running QEMU with some pre-built images.

BUILD DEPENDANCIES

As has been noted in the comments the configure script will automatically enable features as long as the pre-requisite developer libraries are installed on your sytem. With a Debian/Ubuntu system this is easily achieved by running:

sudo apt-get build-dep qemu

Of course if you want to enable a feature (either a bleeding edge or non-standard) that requires additional libraries then you will need to install the appropriate development packages manually. The config.log file is usually a useful first step in working out what headers are being looked for.

BUILDING QEMU

git clone git://git.qemu.org/qemu.git qemu.git
cd qemu.git
./configure --target-list=aarch64-softmmu
make

Assuming the build ran without any problems you should now have an executable ./aarch64-softmmu/qemu-system-aarch64 in your build directory. Grab a pre-built image from here and we’ll check it works. The image is a kernel that has been combined with an initial RAM disk (initrd) with a basic root file-system. I go into more details on how to create this later on.

Be aware the command line is quite long so make sure you copy it all