--- /dev/null
+#!/usr/bin/env bash
+# Enable WC in VFIO-PCI driver
+# Tested on:
+# * Amazon Linux 2 AMI (HVM), SSD Volume Type - ami-0bb3fad3c0286ebd5
+# * Amazon Linux AMI 2018.03.0 (HVM), SSD Volume Type - ami-015232c01a82b847b
+# * Red Hat Enterprise Linux 8 (HVM), SSD Volume Type - ami-08f4717d06813bf00
+# * Ubuntu Server 20.04 LTS (HVM), SSD Volume Type - ami-06fd8a495a537da8b
+# * Ubuntu Server 18.04 LTS (HVM), SSD Volume Type - ami-0823c236601fef765
+
+set -e
+
+TMP_DIR="tmp"
+
+# Kernel modules location:
+P1="/usr/lib/modules/`uname -r`/kernel/drivers/vfio"
+P2="/lib/modules/`uname -r`/kernel/drivers/vfio"
+
+# This may return an error if executed from inside the script
+set +e
+RED="$(tput setaf 1)"
+GREEN="$(tput setaf 2)"
+
+BOLD="$(tput bold)"
+NORMAL="$(tput sgr0)"
+set -e
+
+function bold {
+ echo -e "${BOLD}${@}${NORMAL}"
+}
+
+function err {
+ bold "${RED}ERROR: ${@}"
+}
+
+function green {
+ bold "${GREEN}${@}"
+}
+
+function get_kernel_version {
+ local ver=$(uname -r | cut -f 1 -d '-')
+ local ver_major=$(echo $ver | cut -f1 -d '.')
+ local ver_minor=$(echo $ver | cut -f2 -d '.')
+ local ver_subminor=$(echo $ver | cut -f3 -d '.')
+
+ printf "%d%02d%04d" "${ver_major}" "${ver_minor}" "${ver_subminor}"
+}
+
+function download_kernel_src_yum {
+ echo "Use yum to get the kernel sources"
+
+ bold "\nInstall required applications and kernel headers"
+ yum install -y gcc "kernel-$(uname -r)" "kernel-devel-$(uname -r)" \
+ git make elfutils-libelf-devel patch yum-utils
+ green Done
+
+ # Download kernel source
+ bold "\nDownload kernel source with vfio"
+ yumdownloader --source "kernel-devel-$(uname -r)"
+ rpm2cpio kernel*.src.rpm | cpio -idmv
+ green Done
+
+ rm -f *patches.tar
+ tar xf linux-*.tar*
+ rm -f linux-*.tar* linux-*.patch
+}
+
+function download_kernel_src_apt {
+ echo "Use apt-get to get the kernel sources"
+ apt-get -q -y update
+ green Done
+
+ bold "\nInstall required applications"
+ apt-get -q -y install dpkg-dev build-essential git
+ green Done
+
+ bold "\nDownload Linux kernel source with vfio"
+ if ! apt-get -q -y source -t focal linux-image-$(uname -r); then
+ err "Cannot download Linux kernel source.\nPlease uncomment appropriate 'deb-src' line in the /etc/apt/sources.list file"
+ exit 1
+ fi
+ green Done
+
+ rm -f linux-*.dsc linux-*.gz
+}
+
+function download_kernel_src {
+ bold "[1] Downloading prerequisites..."
+ rm -rf "${TMP_DIR}"
+ mkdir -p "${TMP_DIR}"
+ cd "${TMP_DIR}"
+
+ if apt-get -v >/dev/null 2>/dev/null; then
+ download_kernel_src_apt
+ else
+ download_kernel_src_yum
+ fi
+ cd linux-*
+}
+
+function apply_wc_patch {
+ echo "Using patch for kernel version 4.10"
+ local wc_patch="${BASE_PATH}/patches/linux-4.10-vfio-wc.patch"
+
+ if ! patch --ignore-whitespace -p1 < "${wc_patch}"; then
+ err "Cannot apply patch: ${wc_patch}!"
+ exit 1
+ fi
+}
+
+function compile_vfio_driver {
+ bold "\n[2] Patch and build the vfio driver"
+ # Adjust VFIO-PCI driver
+
+ bold "Apply patch for the write combining to the vfio-pci"
+ apply_wc_patch
+ green Done
+
+ cd drivers/vfio
+ # Configure Makefile - build VFIO with support for NOIOMMU mode
+ bold "\nConfigure Makefile for standalone vfio build and noiommu mode support"
+ echo "ccflags-y := -DCONFIG_VFIO_NOIOMMU=1" >> Makefile
+ echo 'all:' >> Makefile
+ echo ' make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules' >> Makefile
+ green Done
+
+ bold "\nBuild the driver"
+ if ! make; then
+ err "Compilation error."
+ exit 1
+ fi
+ green Done
+}
+
+function get_module_location {
+ for p in ${P1} ${P2}; do
+ if find "${p}" -name "vfio.*" >/dev/null 2>/dev/null; then
+ MOD_PATH="${p}"
+ break
+ fi
+ done
+
+ if [ -z "${MOD_PATH}" ]; then
+ err "Cannot find kernel modules location..."
+ exit
+ fi
+}
+
+function get_module_compression {
+ if ls "${MOD_PATH}/vfio.ko.xz" >/dev/null 2>/dev/null; then
+ XZ=".xz"
+ else
+ XZ=""
+ fi
+}
+
+function replace_module {
+ local installed=0
+
+ bold "\n[3] Install module"
+ get_module_location
+ get_module_compression
+
+ for name in "pci/vfio-pci.ko" "pci/vfio-pci-core.ko" "vfio.ko"; do
+ if test -e "${MOD_PATH}/${name}${XZ}"; then
+ if [ -n "${XZ}" ]; then
+ xz "${name}" -c > "${name}${XZ}"
+ fi
+ mv "${MOD_PATH}/${name}${XZ}" "${MOD_PATH}/${name}${XZ}_no_wc"
+ cp "${name}${XZ}" "${MOD_PATH}/${name}${XZ}"
+ bold "Installing: ${MOD_PATH}/${name}${XZ}"
+ installed=1
+ fi
+ done
+ if [ "${installed}" -eq 1 ]; then
+ green "Module installed at: ${MOD_PATH}"
+ else
+ err "Failure during vfio-pci module installation. Prehaps it's not provided as a kernel module!"
+ exit 1
+ fi
+}
+
+###############################################
+# Main script code
+###############################################
+
+if [ "$(id -u)" -ne 0 ]; then
+ err 'Please execute script as a root'
+ exit 1
+fi
+
+cd $(dirname ${0})
+BASE_PATH=$(pwd)
+
+KERNEL_VERSION=$(get_kernel_version)
+
+if [ "${KERNEL_VERSION}" -lt 4100000 ]; then
+ err "Kernel version: $(uname -r) is not supported by the script. Please upgrade kernel to at least v4.10."
+ exit 1
+fi
+
+download_kernel_src
+compile_vfio_driver
+replace_module
Code Review / csit.git / blobdiff