On Fri, Feb 22, 2019 at 07:17:00PM +0530, Pintu Agarwal wrote:
Hi All,
Hi,
I want to build Linux Kernel 4.20 for arm64 and use it on qemu-arm64. I see that there is a defconfig available in arch/arm64/configs/defconfig But I am not sure whether it will work for qemu-arm64, and by default which machine type is supported.
I already have working setup for qemu-arm for both versatile and vexpress machine. There is already a defconfig available for these under arch/arm. So I can build the kernel for it.
But, whether these defconfig are supported for arm64 ? If anybody have setup for qemu-arm64 kernel, please share the steps. About rootfs, I am planning to use the arm32 version of busybox itself.
The arm64 defconfig is intended to work for all platforms. I use that with qemu's '-machine virt'. Assuming you use virtio-net and virtio-block, no additional drivers are required. For example, I can boot a defconfig kernel using the followign QEMU options: qemu-system-aarch64 \ -m 2048 -smp 4 \ -net nic \ -net user,host=10.0.2.10,hostfwd=tcp::65022-:22 \ -nographic \ -no-reboot \ -machine virt,accel=kvm,gic_version=host \ -cpu host \ -hda ${FILESYSTEM} \ -snapshot \ -kernel ${KERNEL} \ -append "earlycon root=/dev/vda panic_on_warn" Thanks, Mark.