sce-kconfig

#!/bin/bash
#
# This script generates a Linux kernel config for SCE.
#
# The script may be run with multiple arguments, each of which appends
# additional config settings that are merged into the final result. To add a
# new target, add a function that appends some config to the .config file,
# and add it to the usage and main while loop.

set -e

# default sets the default config for SCE kernels
#
# Please maintain the commented sections and keep config sorted within the
# section, for sanity.
default() {
    cat << EOF >> .config
# kernel version
CONFIG_LOCALVERSION="-sce"
CONFIG_LOCALVERSION_AUTO=y
# VM config
CONFIG_HYPERVISOR_GUEST=y
CONFIG_PARAVIRT=y
CONFIG_KVM_GUEST=y
# /proc/config.gz support
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
# network config
CONFIG_BRIDGE=m
CONFIG_DUMMY=m
CONFIG_IFB=m
CONFIG_INET_AH=m
CONFIG_INET_DIAG=m
CONFIG_INET_ESP=m
CONFIG_IPVLAN=m
CONFIG_IP_DCCP=m
CONFIG_IP_SCTP=m
CONFIG_MACVLAN=m
CONFIG_MPTCP=y
CONFIG_NETLINK_DIAG=m
CONFIG_NET_FOU=m
CONFIG_NET_FOU_IP_TUNNELS=y
CONFIG_NET_IPIP=m
CONFIG_NET_IPVTI=m
CONFIG_NLMON=m
CONFIG_TUN=m
CONFIG_VETH=m
CONFIG_VLAN_8021Q=m
CONFIG_VXLAN=m
CONFIG_WIREGUARD=m
# SCE qdiscs
CONFIG_NET_SCH_CAKE=m
CONFIG_NET_SCH_CNQ_COBALT=m
CONFIG_NET_SCH_CNQ_CODEL_AF=m
CONFIG_NET_SCH_COBALT=m
CONFIG_NET_SCH_DELTIC=y
CONFIG_NET_SCH_DELTIC_POLYA=m
CONFIG_NET_SCH_DELTIC_ZERNO=n
CONFIG_NET_SCH_DELTIC_BOROSHNE=m
CONFIG_NET_SCH_DELTIC_KHLIB=n
CONFIG_NET_SCH_LFQ_COBALT=m
CONFIG_NET_SCH_QUARTZ=m
CONFIG_NET_SCH_TWIN_CODEL_AF=m
# other qdiscs
CONFIG_NET_SCH_CODEL=m
CONFIG_NET_SCH_DRR=m
CONFIG_NET_SCH_FQ=m
CONFIG_NET_SCH_FQ_CODEL=m
CONFIG_NET_SCH_FQ_PIE=m
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_HFSC=m
CONFIG_NET_SCH_HTB=m
CONFIG_NET_SCH_INGRESS=m
CONFIG_NET_SCH_MQPRIO=m
CONFIG_NET_SCH_NETEM=m
CONFIG_NET_SCH_PIE=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_QFQ=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFB=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_SKBPRIO=m
# net/sched classifiers, matches and actions
CONFIG_CLS_U32_MARK=y
CONFIG_CLS_U32_PERF=y
CONFIG_NET_ACT_BPF=m
CONFIG_NET_ACT_CSUM=m
CONFIG_NET_ACT_GACT=m
CONFIG_NET_ACT_MIRRED=m
CONFIG_NET_ACT_PEDIT=m
CONFIG_NET_ACT_POLICE=m
CONFIG_NET_ACT_SKBEDIT=m
CONFIG_NET_ACT_SKBMOD=m
CONFIG_NET_ACT_VLAN=m
CONFIG_NET_CLS_ACT=y
CONFIG_NET_CLS_BPF=m
CONFIG_NET_CLS_FLOW=m
CONFIG_NET_CLS_FLOWER=m
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_MATCHALL=m
CONFIG_NET_CLS_U32=m
CONFIG_NET_EMATCH_CMP=m
CONFIG_NET_EMATCH_META=m
CONFIG_NET_EMATCH_NBYTE=m
CONFIG_NET_EMATCH_TEXT=m
CONFIG_NET_EMATCH_U32=m
# SCE transports
CONFIG_TCP_CONG_CUBIC_SCE=m
CONFIG_TCP_CONG_DCTCP_SCE=m
CONFIG_TCP_CONG_LINEAR=m
CONFIG_TCP_CONG_RENO_SCE=m
# other transports
CONFIG_TCP_CONG_BBR=m
CONFIG_TCP_CONG_DCTCP=m
CONFIG_TCP_CONG_HSTCP=m
CONFIG_TCP_CONG_LP=m
CONFIG_TCP_CONG_SCALABLE=m
CONFIG_TCP_CONG_VEGAS=m
CONFIG_TCP_CONG_VENO=m
EOF
}

# pn52 sets config for Arch Linux on the ASUS ExpertCenter PN52
#
# note: add tsc=reliable to /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT
#
# also tried, with no benefit:
# KCFLAGS="-march=znver3" and "-march=native"
pn52() {
    cat << EOF >> .config
# required to boot
CONFIG_BLK_DEV_NVME=m
CONFIG_FW_LOADER_COMPRESS=y
CONFIG_FW_LOADER_COMPRESS_XZ=y
CONFIG_FW_LOADER_COMPRESS_ZSTD=y
# video and console
CONFIG_DRM_AMDGPU=m
CONFIG_FB=y
CONFIG_FRAMEBUFFER_CONSOLE=y
# KVM support
CONFIG_KVM=m
CONFIG_KVM_AMD=m
# additional hardware support
CONFIG_NVME_HWMON=y
CONFIG_X86_X2APIC=y
CONFIG_X86_AMD_PLATFORM_DEVICE=y
CONFIG_AMD_IOMMU=y
CONFIG_AMD_IOMMU_V2=m
CONFIG_SENSORS_K10TEMP=m
# disable some heavy-weight defaults we don't use
CONFIG_SND_HDA_INTEL=n
CONFIG_DRM_I915=n
# other possible AMD configs we're not using
# CONFIG_AMD_PMC
# CONFIG_PERF_EVENTS_AMD_POWER
# CONFIG_CRYPTO_DEV_CCP=y
# CONFIG_CRYPTO_DEV_CCP_DD=m
# CONFIG_CRYPTO_DEV_SP_CCP=y
# CONFIG_CRYPTO_DEV_CCP_CRYPTO=m
# CONFIG_CRYPTO_DEV_SP_PSP=y
# CONFIG_SENSORS_FAM15H_POWER=m
# CONFIG_USB_XHCI_PCI_RENESAS=m
# CONFIG_ASUS_WMI=m
# CONFIG_MK8 # for older CPUs
EOF
}

# usage
if (($# == 0)); then
    cat << EOF >&2
usage: $0 [target] ...

valid targets:
default  default config
pn52     ASUS ExpertCenter PN52
EOF
    exit 1
fi

# start with default config and add SCE defaults
make defconfig
default

# add configs for each of the specified targets
while (($# > 0)); do
    case "$1" in
    pn52)
        $1
        ;;
    default)
        ;;
    *)
        >&2 echo "error: unrecognized target: $1"
        exit 1
    esac
    shift
done

# take any other defaults based on the new config
make olddefconfig