added virtio post

1 files changed, 67 insertions, 0 deletions

diff --git a/content/2021-12-02-toying-with-virtio/build_kernel.sh b/content/2021-12-02-toying-with-virtio/build_kernel.sh
new file mode 100755
index 0000000..b219b57
--- /dev/null
+++ b/content/2021-12-02-toying-with-virtio/build_kernel.sh
@@ -0,0 +1,67 @@
+#!/bin/bash
+
+set -e
+
+LINUX=linux-5.15.6
+
+test -f $LINUX.tar.xz || wget -nc https://cdn.kernel.org/pub/linux/kernel/v5.x/$LINUX.tar.xz
+test -d $LINUX || tar xf $LINUX.tar.xz
+
+cd $LINUX
+
+cat <<EOF > kernel_fragment.config
+# 64bit kernel.
+CONFIG_64BIT=y
+# Enable support for cpio compressed initramfs (gzip).
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_RD_GZIP=y
+# Support for ELF and #! binary format.
+CONFIG_BINFMT_ELF=y
+CONFIG_BINFMT_SCRIPT=y
+# Enable devtmpfs (can automatically populate /dev).
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# Enable tty & console.
+CONFIG_TTY=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+# Enable proc & sys pseudo fs.
+CONFIG_PROC_FS=y
+CONFIG_SYSFS=y
+
+# Enable support for virtio pci.
+CONFIG_PCI=y
+CONFIG_VIRTIO_MENU=y
+CONFIG_VIRTIO_PCI=y
+
+# Enable virtio console driver.
+CONFIG_VIRTIO_CONSOLE=y
+
+# Enable support for block devices.
+CONFIG_BLK_DEV=y
+
+# Enable virtio blk driver.
+CONFIG_VIRTIO_BLK=y
+
+# Enable support for ext2 filesystems.
+CONFIG_EXT2_FS=y
+
+# Enable general networking support.
+CONFIG_NET=y
+
+# Enable support for TCP/IP.
+CONFIG_INET=y
+
+# Enable support for network devices.
+CONFIG_NETDEVICES=y
+
+# Enable networking core drivers.
+CONFIG_NET_CORE=y
+
+# Enable virtio net driver.
+CONFIG_VIRTIO_NET=y
+EOF
+
+make tinyconfig
+./scripts/kconfig/merge_config.sh -n ./kernel_fragment.config
+make -j$(nproc)