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coreboot-kgpe-d16/Documentation/mainboard/emulation/qemu-power9.md

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QEMU PPC64 emulator

This page describes how to build and run coreboot for QEMU/PPC64. You can configure ELF payload via make menuconfig (make sure "ROM chip size" is large enough).

Running coreboot in QEMU

qemu-system-ppc64 -M powernv,hb-mode=on \
                  -cpu power9 \
                  -bios build/coreboot.rom \
                  -drive file=build/coreboot.rom,if=mtd \
                  -serial stdio \
                  -display none
  • The default CPU in QEMU for AArch64 is a 604. You specify a suitable PowerPC CPU via -cpu power9.
  • By default Hostboot mode is off and it needs to be turned on to run coreboot as a firmware rather than like an OS.
  • -bios specifies initial program (bootloader should suffice, but whole image works fine too).
  • -drive specifies image for emulated flash device.

Building coreboot

make defconfig KBUILD_DEFCONFIG=configs/config.emulation_qemu_power9
make

This builds coreboot with no payload.