X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=fdio.infra.ansible%2Froles%2Faws%2Ffiles%2Fget-vfio-with-wc.sh;fp=fdio.infra.ansible%2Froles%2Faws%2Ffiles%2Fget-vfio-with-wc.sh;h=02a3139b66480c9b86d48998e08969cb7a6746a0;hb=7566d9fe1ff86a7dab3de09f9477e50d60a12dfc;hp=0000000000000000000000000000000000000000;hpb=82419f7f8a1b08c7451340b413e54486bd4c0b9b;p=csit.git

diff --git a/fdio.infra.ansible/roles/aws/files/get-vfio-with-wc.sh b/fdio.infra.ansible/roles/aws/files/get-vfio-with-wc.sh
new file mode 100644
index 0000000000..02a3139b66
--- /dev/null
+++ b/fdio.infra.ansible/roles/aws/files/get-vfio-with-wc.sh
@@ -0,0 +1,203 @@
+#!/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