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>
53 lines
1.7 KiB
Markdown
53 lines
1.7 KiB
Markdown
# QEMU PPC64 emulator
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This page describes how to build and run coreboot for QEMU/PPC64.
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## Building coreboot
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```bash
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make defconfig KBUILD_DEFCONFIG=configs/config.emulation_qemu_power9
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make
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```
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This builds coreboot with no payload.
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## Payloads
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You can configure ELF or `skiboot` payload via `make menuconfig`. In either case
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you might need to adjust "ROM chip size" and make it large enough to accommodate
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the payload (see how much space it needs in the error you get if it doesn't
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fit).
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## Running coreboot in QEMU
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```bash
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qemu-system-ppc64 -M powernv,hb-mode=on \
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-cpu power9 \
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-bios build/coreboot.rom \
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-drive file=build/coreboot.rom,if=mtd \
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-serial stdio \
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-display none
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```
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- The default CPU in QEMU for AArch64 is a 604. You specify a suitable
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PowerPC CPU via `-cpu power9`.
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- By default Hostboot mode is off and needs to be turned on to run coreboot
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as a firmware rather than like an OS.
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- `-bios` specifies initial program (bootloader should suffice, but whole image
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works fine too).
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- `-drive` specifies image for emulated flash device.
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## Running with a kernel
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Loading `skiboot` (built automatically by coreboot or otherwise) allows
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specifying kernel and root file system to be run.
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```bash
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qemu-system-ppc64 -M powernv,hb-mode=on \
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-cpu power9 \
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-bios build/coreboot.rom \
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-drive file=build/coreboot.rom,if=mtd \
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-serial stdio \
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-display none \
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-kernel zImage \
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-initrd initrd.cpio.xz
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```
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- Specify path to your kernel via `-kernel`.
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- Specify path to your rootfs via `-initrd`.
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