Make defconfig usable with OpenBMC

[shenki]

If we try to use the aspeed_g4_defconfig built kernel to boot the rest of OpenBMC, such as ast# bootm 0x43000000 0x20300000, it fails to mount the initrd.

This is the list of differences between the aspeed_g4_defconfig and the OpenBMC defconfig:

diff --git a/defconfig b/defconfig
index f77acab80c00..05819c6798c5 100644
--- a/defconfig
+++ b/defconfig
@@ -1,9 +1,8 @@
 CONFIG_KERNEL_XZ=y
+# CONFIG_SWAP is not set
 CONFIG_SYSVIPC=y
-CONFIG_USELIB=y
 CONFIG_IRQ_DOMAIN_DEBUG=y
 CONFIG_NO_HZ_IDLE=y
-CONFIG_HIGH_RES_TIMERS=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_CGROUPS=y
 CONFIG_BLK_DEV_INITRD=y
@@ -12,14 +11,17 @@ CONFIG_BLK_DEV_INITRD=y
 # CONFIG_RD_LZ4 is not set
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_BPF_SYSCALL=y
-# CONFIG_AIO is not set
 CONFIG_EMBEDDED=y
+CONFIG_PERF_EVENTS=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_SLAB=y
+CONFIG_SLAB_FREELIST_RANDOM=y
+CONFIG_JUMP_LABEL=y
 CONFIG_CC_STACKPROTECTOR_STRONG=y
-CONFIG_MODULES=y
-CONFIG_MODULE_UNLOAD=y
 # CONFIG_LBDAF is not set
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+# CONFIG_IOSCHED_CFQ is not set
 # CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_ASPEED=y
 CONFIG_MACH_ASPEED_G4=y
@@ -34,32 +36,44 @@ CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_KEXEC=y
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+# CONFIG_SUSPEND is not set
 CONFIG_NET=y
 CONFIG_PACKET=y
-CONFIG_PACKET_DIAG=y
 CONFIG_UNIX=y
-CONFIG_UNIX_DIAG=y
 CONFIG_INET=y
 CONFIG_IP_MULTICAST=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
 CONFIG_SYN_COOKIES=y
 # CONFIG_INET_XFRM_MODE_TRANSPORT is not set
 # CONFIG_INET_XFRM_MODE_TUNNEL is not set
 # CONFIG_INET_XFRM_MODE_BEET is not set
-CONFIG_INET_UDP_DIAG=y
+# CONFIG_INET_DIAG is not set
 # CONFIG_INET6_XFRM_MODE_TRANSPORT is not set
 # CONFIG_INET6_XFRM_MODE_TUNNEL is not set
 # CONFIG_INET6_XFRM_MODE_BEET is not set
 # CONFIG_IPV6_SIT is not set
+CONFIG_NETFILTER=y
+CONFIG_IP_NF_IPTABLES=y
+CONFIG_IP_NF_FILTER=y
 CONFIG_NET_NCSI=y
+# CONFIG_WIRELESS is not set
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_PREVENT_FIRMWARE_BUILD is not set
 CONFIG_MTD=y
+CONFIG_MTD_CMDLINE_PARTS=y
 CONFIG_MTD_BLOCK=y
+CONFIG_MTD_PARTITIONED_MASTER=y
 CONFIG_MTD_SPI_NOR=y
 CONFIG_ASPEED_FLASH_SPI=y
+CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_COUNT=4
+CONFIG_BLK_DEV_RAM_SIZE=8192
 CONFIG_EEPROM_AT24=y
 CONFIG_NETDEVICES=y
 # CONFIG_NET_VENDOR_ARC is not set
@@ -85,12 +99,15 @@ CONFIG_FTGMAC100=y
 # CONFIG_NET_VENDOR_VIA is not set
 # CONFIG_NET_VENDOR_WIZNET is not set
 CONFIG_BROADCOM_PHY=y
-CONFIG_REALTEK_PHY=y
 # CONFIG_WLAN is not set
-# CONFIG_INPUT is not set
+# CONFIG_INPUT_LEDS is not set
+# CONFIG_INPUT_MOUSEDEV is not set
+CONFIG_INPUT_EVDEV=y
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
-# CONFIG_LEGACY_PTYS is not set
+CONFIG_LEGACY_PTY_COUNT=4
 # CONFIG_DEVKMEM is not set
 CONFIG_SERIAL_8250=y
 # CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
@@ -104,7 +121,6 @@ CONFIG_SERIAL_ASPEED_VUART=y
 CONFIG_ASPEED_BT_IPMI_BMC=y
 # CONFIG_HW_RANDOM is not set
 CONFIG_I2C=y
-# CONFIG_I2C_COMPAT is not set
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_ASPEED=y
 CONFIG_SENSORS_LM75=y
@@ -114,44 +130,53 @@ CONFIG_PMBUS=y
 # CONFIG_SENSORS_PMBUS is not set
 CONFIG_SENSORS_ADM1275=y
 CONFIG_SENSORS_TMP421=y
+# CONFIG_HID is not set
 # CONFIG_USB_SUPPORT is not set
+CONFIG_NEW_LEDS=y
+CONFIG_LEDS_CLASS=y
+CONFIG_LEDS_GPIO=y
+CONFIG_LEDS_TRIGGERS=y
+CONFIG_LEDS_TRIGGER_TIMER=y
+CONFIG_LEDS_TRIGGER_HEARTBEAT=y
+CONFIG_LEDS_TRIGGER_GPIO=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_DS1307=y
 CONFIG_RTC_DRV_ASPEED=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_FIRMWARE_MEMMAP=y
 CONFIG_FANOTIFY=y
+CONFIG_AUTOFS4_FS=y
 CONFIG_OVERLAY_FS=y
+CONFIG_VFAT_FS=y
 CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
 CONFIG_JFFS2_FS=y
-CONFIG_JFFS2_FS_WBUF_VERIFY=y
+CONFIG_JFFS2_SUMMARY=y
+CONFIG_JFFS2_FS_XATTR=y
 CONFIG_SQUASHFS=y
 CONFIG_SQUASHFS_XZ=y
-CONFIG_PRINTK_TIME=y
+CONFIG_NFS_FS=y
+CONFIG_ROOT_NFS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_CODEPAGE_850=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NLS_UTF8=y
 CONFIG_DYNAMIC_DEBUG=y
 CONFIG_STRIP_ASM_SYMS=y
-CONFIG_PAGE_POISONING=y
-CONFIG_DEBUG_KMEMLEAK=y
-CONFIG_DEBUG_SHIRQ=y
-CONFIG_LOCKUP_DETECTOR=y
-CONFIG_WQ_WATCHDOG=y
+CONFIG_DEBUG_FS=y
 # CONFIG_SCHED_DEBUG is not set
-CONFIG_SCHED_STACK_END_CHECK=y
-CONFIG_DEBUG_RT_MUTEXES=y
-CONFIG_DEBUG_WW_MUTEX_SLOWPATH=y
 # CONFIG_FTRACE is not set
-CONFIG_MEMTEST=y
-CONFIG_UBSAN=y
 CONFIG_DEBUG_USER=y
 CONFIG_DEBUG_LL=y
 CONFIG_DEBUG_LL_UART_8250=y
 CONFIG_DEBUG_UART_PHYS=0x1e784000
 CONFIG_DEBUG_UART_VIRT=0xe8784000
 CONFIG_EARLY_PRINTK=y
-CONFIG_DEBUG_SET_MODULE_RONX=y
 # CONFIG_CRYPTO_ECHAINIV is not set
 # CONFIG_CRYPTO_HW is not set
 # CONFIG_XZ_DEC_X86 is not set
 # CONFIG_XZ_DEC_POWERPC is not set
 # CONFIG_XZ_DEC_IA64 is not set
+# CONFIG_XZ_DEC_ARM is not set
+# CONFIG_XZ_DEC_ARMTHUMB is not set
 # CONFIG_XZ_DEC_SPARC is not set

[shenki]

The in-kernel defconfig is a superset of the openbmc options, so this should no longer be an issue.