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2 posts tagged with "qemu"

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QEMU Direct Linux Kernel Boot

· 3 min read
Frank Chen
Frank Chen
Backend & Applied ML Engineer

Here, I will employ QEMU to emulate a minimal Linux x86_64 platform with a minimal root filesystem from scratch, as well as debugging with GDB:

  • Build Linux x86_64 kernel
  • Build Linux x86_64 rootfs(root filesystem)
  • Run QEMU
  • Debug with GDB

Why do I use QEMU to boot Linux kernel directly with skipping BIOS/UEFI boot procedures?

Use QEMU to launch a Linux kernel directly without having to make a fully bootable disk image. This is very useful for:

  • Linux kernel testing
  • root filesystem testing
  • arm system emulation

QEMU Emulate Raspberry Pi 3 and 4

· 9 min read
Frank Chen
Frank Chen
Backend & Applied ML Engineer

In this blog, QEMU is employed to emulate Raspberry Pi 3/4 in mac M1 host(it's also supposed to work in Windows/Linux with a little tweak). I will demonstrate two different ways to emulate Raspberry Pi 3 and Raspberry Pi 4 in respect. These two ways are different by using different QEMU machines as you would like to use:

  1. -machine raspi3b: raspberry pi 3b machine to emulate Raspberry Pi 3.
  2. -machine virt: general arm machine to emulate Raspberry Pi 4.
note

In mac M1 with setting -machine virt, I use the hardware acceleration by -accel hvf. In Windows(x86_64), the hardware acceleration for aarch64 is not available, so removing the hardware acceleration will work as well in Windows.

For both of these two, we still need prepare some common steps before running QEMU:

  • Extract the appropriate kernel, device tree or root filesystem