Re: [Buildroot] [PATCH 1/3] configs/qemu: Add a ppc64le-powernv8 configuration

["Cédric Le Goater" <clg@kaod.org>]

oops. I sent the patchset twice. Sorry for the noise.

C.

On 1/10/22 22:02, Cédric Le Goater wrote:
> PowerNV is the platform using the OPAL [1] firmware on OpenPOWER
> systems. OPAL first loads a kernel and an initramfs image based on
> buildroot including a second boot loader petitboot [2]. The latter
> does device discovery and kexecs a new Linux image from disk or
> network.
> 
> QEMU implements PowerNV machines [3] for the POWER8, POWER9 and
> Power10 processors which are used for dev and tests. POWER8 images
> being compatible with POWER9 and Power10, simply add a single
> qemu_ppc64le_powernv8 board for all.
> 
> The QEMU script boots directly from a nvme disk because it is simple
> enough but a real system would boot from a ramfs first.
> 
> [1] https://github.com/open-power/skiboot/blob/master/doc/overview.rst
> [2] https://github.com/open-power/petitboot/
> [3] https://qemu.readthedocs.io/en/latest/system/ppc/powernv.html
> 
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---
>   board/qemu/ppc64le-powernv8/readme.txt  |  5 +++++
>   configs/qemu_ppc64le_powernv8_defconfig | 29 +++++++++++++++++++++++++
>   2 files changed, 34 insertions(+)
>   create mode 100644 board/qemu/ppc64le-powernv8/readme.txt
>   create mode 100644 configs/qemu_ppc64le_powernv8_defconfig
> 
> diff --git a/board/qemu/ppc64le-powernv8/readme.txt b/board/qemu/ppc64le-powernv8/readme.txt
> new file mode 100644
> index 000000000000..059f55fbc917
> --- /dev/null
> +++ b/board/qemu/ppc64le-powernv8/readme.txt
> @@ -0,0 +1,5 @@
> +Run the emulation with:
> +
> +qemu-system-ppc64 -M powernv9 -kernel vmlinux -append "console=hvc0 rootwait root=/dev/nvme0n1" -device nvme,bus=pcie.3,addr=0x0,drive=drive0,serial=1234 -drive file=./rootfs.ext2,if=none,id=drive0,format=raw,cache=none -device e1000e,netdev=net0,mac=C0:FF:EE:00:01:03,bus=pcie.1,addr=0x0  -netdev user,id=net0 -serial mon:stdio -nographic # qemu_ppc64le_powernv8_defconfig
> +
> +The login prompt will appear in the terminal window.
> diff --git a/configs/qemu_ppc64le_powernv8_defconfig b/configs/qemu_ppc64le_powernv8_defconfig
> new file mode 100644
> index 000000000000..d8ea6655fce0
> --- /dev/null
> +++ b/configs/qemu_ppc64le_powernv8_defconfig
> @@ -0,0 +1,29 @@
> +# Architecture
> +BR2_powerpc64le=y
> +BR2_powerpc_power8=y
> +
> +# System
> +BR2_TARGET_GENERIC_GETTY_PORT="hvc0"
> +BR2_SYSTEM_DHCP="eth0"
> +
> +# Filesystem
> +BR2_TARGET_ROOTFS_EXT2=y
> +# BR2_TARGET_ROOTFS_TAR is not set
> +
> +# Image
> +BR2_ROOTFS_POST_IMAGE_SCRIPT="board/qemu/post-image.sh"
> +BR2_ROOTFS_POST_SCRIPT_ARGS="$(BR2_DEFCONFIG)"
> +
> +# Linux headers same as kernel
> +BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_15=y
> +
> +# Kernel
> +BR2_LINUX_KERNEL=y
> +BR2_LINUX_KERNEL_CUSTOM_VERSION=y
> +BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.15"
> +BR2_LINUX_KERNEL_DEFCONFIG="powernv"
> +BR2_LINUX_KERNEL_VMLINUX=y
> +
> +# host-qemu for gitlab testing
> +BR2_PACKAGE_HOST_QEMU=y
> +BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE=y
> 

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