Merge pull request #787 from wedsonaf/configs

configs: add `qemu-busybox-min`

Author: wedsonaf

arch/arm64/configs/qemu-busybox-min.config

@@ -0,0 +1,11 @@
+CONFIG_PCI_HOST_GENERIC=y
+
+CONFIG_SERIAL_AMBA_PL011=y
+CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+
+CONFIG_GPIOLIB=y
+CONFIG_GPIO_PL061=y
+
+CONFIG_KEYBOARD_GPIO=y
+
+CONFIG_CMDLINE="console=ttyAMA0 nokaslr rdinit=/sbin/init"

arch/x86/configs/qemu-busybox-min.config

@@ -0,0 +1,11 @@
+CONFIG_64BIT=y
+CONFIG_ACPI=y
+
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+
+CONFIG_HYPERVISOR_GUEST=y
+CONFIG_PVH=y
+
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="console=ttyS0 nokaslr rdinit=/sbin/init"

kernel/configs/qemu-busybox-min.config

@@ -0,0 +1,55 @@
+# This is a minimal configuration for running a busybox initramfs image with
+# networking support.
+#
+# The following command can be used create the configuration for a minimal
+# kernel image:
+#
+# make allnoconfig qemu-busybox-min.config
+#
+# The following command can be used to build the configuration for a default
+# kernel image:
+#
+# make defconfig qemu-busybox-min.config
+#
+# On x86, the following command can be used to run qemu:
+#
+# qemu-system-x86_64 -nographic -kernel vmlinux -initrd initrd.img -nic user,model=rtl8139,hostfwd=tcp::5555-:23
+#
+# On arm64, the following command can be used to run qemu:
+#
+# qemu-system-aarch64 -M virt -cpu cortex-a72 -nographic -kernel arch/arm64/boot/Image -initrd initrd.img -nic user,model=rtl8139,hostfwd=tcp::5555-:23
+
+CONFIG_SMP=y
+CONFIG_PRINTK=y
+CONFIG_PRINTK_TIME=y
+
+CONFIG_PCI=y
+
+# We use an initramfs for busybox with elf binaries in it.
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_RD_GZIP=y
+CONFIG_BINFMT_ELF=y
+
+# This is for /dev file system.
+CONFIG_DEVTMPFS=y
+
+# Core networking (packet is for dhcp).
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_INET=y
+
+# RTL8139 NIC support.
+CONFIG_NETDEVICES=y
+CONFIG_ETHERNET=y
+CONFIG_NET_VENDOR_REALTEK=y
+CONFIG_8139CP=y
+
+# To get GDB symbols and script.
+CONFIG_DEBUG_KERNEL=y
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_GDB_SCRIPTS=y
+
+# For the power-down button (triggered by qemu's `system_powerdown` command).
+CONFIG_INPUT=y
+CONFIG_INPUT_EVDEV=y
+CONFIG_INPUT_KEYBOARD=y