a816c29882
Add an option to build skiboot as a payload. This makes QEMU Power9 board simpler to use as skiboot is necessary anyway. Change-Id: I0b49ea7464c97cc2ff0d5030629deed549851372 Signed-off-by: Igor Bagnucki <igor.bagnucki@3mdeb.com> Signed-off-by: Krystian Hebel <krystian.hebel@3mdeb.com> Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/58656 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>
52 lines
1.7 KiB
Markdown
52 lines
1.7 KiB
Markdown
# QEMU PPC64 emulator
|
|
This page describes how to build and run coreboot for QEMU/PPC64.
|
|
|
|
## Building coreboot
|
|
```bash
|
|
make defconfig KBUILD_DEFCONFIG=configs/config.emulation_qemu_power9
|
|
make
|
|
```
|
|
|
|
This builds coreboot with no payload.
|
|
|
|
## Payloads
|
|
You can configure ELF or `skiboot` payload via `make menuconfig`. In either case
|
|
you might need to adjust "ROM chip size" and make it large enough to accommodate
|
|
the payload (see how much space it needs in the error you get if it doesn't
|
|
fit).
|
|
|
|
## Running coreboot in QEMU
|
|
```bash
|
|
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 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.
|
|
|
|
## Running with a kernel
|
|
Loading `skiboot` (built automatically by coreboot or otherwise) allows
|
|
specifying kernel and root file system to be run.
|
|
|
|
```bash
|
|
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 \
|
|
-kernel zImage \
|
|
-initrd initrd.cpio.xz
|
|
```
|
|
|
|
- Specify path to your kernel via `-kernel`.
|
|
- Specify path to your rootfs via `-initrd`.
|