Setup

Linux Kernel Hacking

Linux: Mainline (/linux_work/linux_mainline)

Hardware: QEMU (qemu-system-x86_64)

Steps

1. Install necessary tools
   • Build tools: gcc, make
   • Kernel configuration: menuconfig dependencies
   • QEMU: emulator
   • Git: version control

2. Clone Linux mainline repository using git clone.

3. Configure and build the Kernel

cd /linux_work/linux_mainline
make mrproper

Configure and build the kernel:

make x86_64_defconfig
make menuconfig
make -j$(nproc)

Detailed instructions here.

1. Setup QEMU for kernel testing

Boot on QEMU:

qemu-system-x86_64 -kernel arch/x86/boot/bzImage -drive file=../qemu.img,index=0,media=disk,format=raw -append "root=/dev/sda console=ttyS0" --enable-kvm --nographic

Kill QEMU using Ctrl-A x.

Other

Show and modify contents of qemu-image.img:

sudo losetup -f --show --partscan qemu.img

Detailed instructions here.

Is there other process using the image?

qemu-system-x86_64 -kernel arch/x86/boot/bzImage -drive file=../qemu-image.img,index=0,media=disk,format=raw -append "root=/dev/sda console=ttyS0" --enable-kvm --nographic
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.80000001H:ECX.svm [bit 2]
qemu-system-x86_64: Failed to get "write" lock
Is another process using the image [../qemu-image.img]?

Fix here.