![qemu system qemu system](https://www.ubuntupit.com/wp-content/uploads/2019/05/qemu.jpg)
It also supports various IP models and reference boards using which one can readily bring-up a SoC and run either bare-metal application or full-fledged OS.Īs we are aware, SystemC is a standard language for the modelling of SoC & Electronics system. It supports various CPU architectures ARM, Micro blaze, PowerPC, Sparc to a name a few and also allows us to enhance or add new CPU architecture. Qemu is completely implemented in ‘C’ language and have its own simulation engine. I find that starting with a configm that works and cutting it down is faster than building one up from nothing by trying to find all the obscure options that need to be present.Qemu is an open-source processor emulator and can be freely downloaded from It is a fast open-source processor emulator and its performance is very close to Host machine performance as it does dynamic translation of Guest instructions into Host machine instructions and run them on Host thus decreasing the boot-time & run-time of the applications running on the simulated platform. The upstream kernel source 'defconfig' also should work. You can boot a stock Debian kernel on the virt board (instructions here: ) so one approach you could take to finding the error in your kernel config is to compare your config with the one the Debian kernel has. So your problem is likely that the kernel config is missing some important items. Your command line option with virt looks basically right (at least enough so to boot you probably want "if=none" rather than "if=sd" and I'm not sure if the network options are quite right, but if those parts are wrong they will result in errors from the guest kernel later rather than total lack of output). Adding virtio-related options won't work, because the raspi3 has no PCI and so there's no way to plug in a pci virtio device. Your raspi3 command line has no networking because on a raspi3 the networking is via USB, and QEMU doesn't have a model of the USB controller for that board yet. On boot, the gadget is now automatically recognized: To be sure, I also modified /boot/cmdline.txt on the Raspberry image (before rebooting with the new kernel) so that it now added the dwc and g_ether modules: now current directory holds "kernel8.img".
![qemu system qemu system](https://user-images.githubusercontent.com/1716020/63227941-74f27480-c1ec-11e9-808b-b8ff14d56c5e.png)
I no longer need the raspbian.img copy so I delete it. # rmdir /mnt/raspi # remove temporary mount point # losetup -d /dev/loop9 # destroy loop device now "ls -la /mnt/raspi" shows the content of image partition 1, with kernels # losetup -o $ /dev/loop9 raspbian.img # because sectors are 512 bytes command "p" lists partitions and tells me that P#1 starts at sector 2048
![qemu system qemu system](http://media.nbcmontana.com/wp-content/uploads/injalolbqkw/qemu-for-windows-pc-free-download.jpg)
So, I copied the Raspbian OS image on my Linux box, and mounted it with loop: # fdisk raspbian.img The only problem was getting it out and use it to replace the wrong kernelv8.img (I could not find the correct one online - and anyway, the kernel of the Raspbian image is by definition more correct). On the other hand, the Raspbian OS image had the correct kernel in its first partition (I could see it in /boot). It was then that I realized that the kernelv8.img file I had downloaded and the Raspbian OS image that I was booting were different versions, so the kernel could not find its modules because it looked for them in the wrong directory. So I tried manually inserting the appropriate module g_ether - and it said that it could not find the driver. I have had the same problems as user in that while I could see the gadget with lsusb, I could not see any net device. Could anyone give me advice for options to build the kernel that works with both the QEMU and the virtio? I decided to build for my own custom kernel.
![qemu system qemu system](http://media.nbcmontana.com/wp-content/uploads/injalolbqkw/wifi-qemu-os-x.jpg)
It means the kernel does not work with virt machine. There is nothing printed and the terminal was suspended. device virtio-blk-device,drive=hd-root \ append "rw root=/dev/vda3 console=ttyAMA0 loglevel=8 rootwait fsck.repair=yes memtest=1" \ I have referenced some forum, and used the "virt" machine instead of raspi3 in order of emulating virtio-network qemu-system-aarch64 \ Qemu-system-aarch64: -device virtio-blk-device,drive=hd-root: No 'virtio-bus' bus found for device 'virtio-blk-device' I tried to add this option -device virtio-blk-device,drive=hd-root \ drive file=./genpi64lite.img,format=raw,if=sd,id=hd-root \ append "rw earlycon=pl011,0x3f201000 console=ttyAMA0 loglevel=8 root=/dev/mmcblk0p3 fsck.repair=yes net.ifnames=0 rootwait memtest=1" \ Everything was working but there was no networking. I used the QEMU(qemu-system-aarch64 -M raspi3) for emulating the Raspberry pi3 with the kernel from the working image.