The riscv-softmmu target for full system emulation is currently supported. It supports booting riscv-linux (currently requires building from the qemu branch). A precompiled copy of the kernel is included in the "hacking_files" directory for convenience (see Method 1 under installation).
Prereqs:
$ sudo apt-get install gcc libc6-dev pkg-config bridge-utils uml-utilities zlib1g-dev libglib2.0-dev autoconf automake libtool libsdl1.2-dev
####Step 1: Build QEMU
$ git clone https://github.com/riscv/riscv-qemu
$ cd riscv-qemu
$ git submodule update --init pixman
$ ./configure --target-list=riscv-softmmu [--prefix=INSTALL_LOCATION]
$ make
$ [make install] # if you supplied prefix above
$ cd riscv-softmmu
####Step 2: Obtain Images
To get started, you may download the following kernel image and disk images from the RISC-V Getting Started Guide.
a) vmlinux
b) root.bin
####Step 3: Run QEMU
Now from the riscv-softmmu/ directory, start qemu-system-riscv:
$ ./qemu-system-riscv -hda [your root.bin location] -kernel [your vmlinux location] -nographic
IMPORTANT: To cleanly exit this system, you must enter halt -f at the prompt
and then hit ctrl-a x. Otherwise, the root filesystem will likely be corrupted.
- Qemu also supports a "linux-user" mode, however this is currently not implemented for RISC-V.
- Once in a while, you may see a message from qemu of the form
main-loop: WARNING: I/O thread spun for N iterations. You may safely ignore this message without consequence. - Files/directories of interest:
- target-riscv/
- hw/riscv/