| #!/usr/bin/env bash |
| |
| # Copyright 2020 The Android KVM Authors |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| source "$(dirname "${BASH_SOURCE[0]}")/../common.inc" |
| |
| default_var QEMU "${PREBUILTS_QEMU_BIN}" |
| default_var ROM_DIR "${PREBUILTS_QEMU_ROM_DIR}" |
| default_var KERNEL "${LINUX_OUT_IMAGE}" |
| default_var ROOTFS "${PREBUILTS_KUT_ROOTFS}" |
| default_var PVMFW "" |
| default_var CPU "" |
| default_var SMP 2 |
| default_var RAM 512 |
| default_var GIC 3 |
| default_var GDB 0 |
| default_var MODE "pkvm" |
| default_var MODE_CPU "" |
| default_var VERBOSE 0 |
| default_var KEEP_TEMP 0 |
| default_var TIMEOUT "" |
| |
| # QEMU CPUs to use for VHE and nVHE runs |
| CPU_VHE="max" |
| CPU_NVHE="cortex-a53" |
| |
| KiB=1024 |
| MiB=$((1024 * KiB)) |
| GiB=$((1024 * MiB)) |
| |
| # We assume the largest potential kernel's PAGE_SIZE (for alignment purpose): |
| MAX_SUPPORTED_PAGE_SIZE=$(( 64*KiB )) |
| # From QEMU's hw/arm/boot.c: |
| # RAM always starts at 1GiB PA offset. The kernel is placed there. |
| KERNEL_ADDR=$(( 1*GiB )) |
| |
| function usage() { |
| cat <<EOF |
| |
| Usage: $0 [-h] [-v] [-K] |
| [-e QEMU] [-L ROM_DIR] [-k KERNEL] [-r ROOTFS] [-R DRIVE] [-F PVMFW] |
| [-c CPU] [-s NUM_CPUS] [-m MEM] [-g GIC] [-M KVM_MODE] [-G] |
| [-t TIMEOUT] [-a APPEND] |
| |
| -h output this help text |
| -v print invoked command |
| -e QEMU emulator binary |
| -L directory where QEMU should look for BIOS image |
| -k kernel image |
| -r root filesystem image |
| -R additional drive image(s) to mount as read-only |
| -F pvmfw image |
| -c CPU model (defaults to "${DEFAULT_CPU}") |
| -s number of CPU cores (defaults to ${DEFAULT_SMP}) |
| -m amount of memory in MB (defaults to ${DEFAULT_RAM}) |
| -g version of GIC (defaults to ${DEFAULT_GIC}) |
| -M KVM mode (defaults to 'pkvm', other: 'vhe', 'nvhe') |
| -a append to kernel command line |
| -G enable debugging of emulated system with GDB |
| -t kill QEMU after given number of seconds |
| -K keep temp files |
| EOF |
| } |
| |
| # Note: Due to a bug in older versions of Bash, use '${array[@]+"${array[@]}"}' |
| # to expand potentially empty arrays. '${array[@]}' is treated as undefined. |
| TMP_FILES=() |
| function cleanup() { |
| rm -f ${TMP_FILES[@]+"${TMP_FILES[@]}"} |
| } |
| |
| function file_size() { |
| stat --format=%s "$1" |
| } |
| |
| function align_up_pow2() { |
| local val="$1" |
| local align="$2" |
| echo $(( (val + (align - 1)) & (~(align - 1)) )) |
| } |
| |
| function align_page_size() { |
| echo $(align_up_pow2 "$1" ${MAX_SUPPORTED_PAGE_SIZE}) |
| } |
| |
| function hex() { |
| printf "%${2-#}x\n" $1 |
| } |
| |
| function min() { |
| echo $(( $1 < $2 ? $1 : $2 )) |
| } |
| |
| function pvmfw_overlay() { |
| local addr=$(hex "$1") |
| local size=$(hex "$2") |
| |
| cat <<EOF |
| &{/} { |
| reserved-memory { |
| #address-cells = <2>; |
| #size-cells = <2>; |
| ranges; |
| |
| pvmfw: pkvm_guest_firmware@$(hex ${addr} '') { |
| compatible = "linux,pkvm-guest-firmware-memory"; |
| no-map; |
| reg = <0x00 ${addr} 0x00 ${size}>; |
| }; |
| }; |
| }; |
| EOF |
| } |
| |
| function inject_overlay() { |
| local overlay="$1" |
| local dtb="$2" |
| |
| ${DTC} -I dts -O dtb <(cat <(${DTC} -I dtb -O dts "${dtb}") "${overlay}") |
| } |
| |
| CMD=() |
| APPEND=() |
| EXTRA_RO_MOUNTS=() |
| |
| while getopts ":e:L:k:r:R:F:c:s:m:g:t:M:a:vGKh" OPT; do |
| case "${OPT}" in |
| e) QEMU="${OPTARG}" ;; |
| L) ROM_DIR="${OPTARG}" ;; |
| k) KERNEL="${OPTARG}" ;; |
| r) ROOTFS="${OPTARG}" ;; |
| R) EXTRA_RO_MOUNTS+=("${OPTARG}") ;; |
| F) PVMFW="${OPTARG}" ;; |
| c) CPU="${OPTARG}" ;; |
| s) SMP="${OPTARG}" ;; |
| m) RAM="${OPTARG}" ;; |
| g) GIC="${OPTARG}" ;; |
| t) TIMEOUT="${OPTARG}" ;; |
| M) MODE="${OPTARG}" ;; |
| a) APPEND+=("${OPTARG}") ;; |
| v) VERBOSE=1 ;; |
| G) GDB=1 ;; |
| K) KEEP_TEMP=1 ;; |
| h) |
| usage |
| exit 0 |
| ;; |
| \?) |
| echo "Invalid option: -${OPTARG}" 1>&2 |
| usage 1>&2 |
| exit 1 |
| ;; |
| :) |
| echo "Invalid option: -${OPTARG} requires an argument" 1>&2 |
| usage 1>&2 |
| exit 1 |
| ;; |
| esac |
| done |
| shift $((OPTIND -1)) |
| if [ $# -ne 0 ]; then |
| echo "Unrecognized options: $@" 1>&2 |
| usage 1>&2 |
| exit 1 |
| fi |
| |
| if [ "${KEEP_TEMP}" -ne 1 ]; then |
| trap cleanup EXIT |
| fi |
| |
| if [ -n "${TIMEOUT}" ]; then |
| CMD+=(timeout -k 1s --foreground "${TIMEOUT}") |
| fi |
| |
| case "${MODE}" in |
| vhe) MODE_CPU="${CPU_VHE}";; |
| nvhe) MODE_CPU="${CPU_NVHE}";; |
| pkvm) APPEND+=(kvm-arm.mode=protected) |
| MODE_CPU="${CPU_NVHE}" |
| ;; |
| *) echo "Unknown KVM mode: ${MODE}" 1>&2 |
| exit 1 |
| ;; |
| esac |
| |
| # If not set by the user, use the default CPU model for the given mode. |
| if [ -z "${CPU}" -a -n "${MODE_CPU}" ]; then |
| CPU="${MODE_CPU}" |
| fi |
| |
| CMD+=("${QEMU}") |
| CMD+=(-M virt) |
| CMD+=(-machine virtualization=true -machine virt,gic-version=${GIC}) |
| CMD+=(-cpu "${CPU}") |
| CMD+=(-smp "${SMP}") |
| CMD+=(-m "${RAM}") |
| CMD+=(-L "${ROM_DIR}") |
| CMD+=(-kernel "${KERNEL}") |
| CMD+=(-drive file="${ROOTFS}",readonly,if=virtio,format=raw) |
| CMD+=(-object rng-random,filename=/dev/urandom,id=rng0) |
| CMD+=(-device virtio-rng-pci,rng=rng0) |
| CMD+=(-nographic -nodefaults -serial stdio) |
| |
| APPEND+=(rootwait root=/dev/vda) |
| |
| # Note: Due to a bug in older versions of Bash, use '${array[@]+"${array[@]}"}' |
| # to expand potentially empty arrays. '${array[@]}' is treated as undefined. |
| for MOUNT in ${EXTRA_RO_MOUNTS[@]+"${EXTRA_RO_MOUNTS[@]}"}; do |
| CMD+=(-drive "file=${MOUNT},readonly,if=virtio,format=raw") |
| done |
| |
| if [ "${GDB}" -eq 1 ]; then |
| CMD+=(-S -s) |
| APPEND+=(nokaslr) |
| fi |
| |
| CMD+=(-append "${APPEND[*]}") |
| |
| if [ -n "${PVMFW}" ]; then |
| QEMU_DTB="$(mktemp)" |
| DTB="$(mktemp)" |
| |
| # Mark files for deletion on EXIT. |
| TMP_FILES+=("${QEMU_DTB}" "${DTB}") |
| |
| # Dump the QEMU DTB. |
| "${CMD[@]}" -machine dumpdtb="${QEMU_DTB}" > /dev/null |
| |
| # Compile the overlayed DTB with dummy values to determine its size. |
| inject_overlay <(pvmfw_overlay 0x0 0x0) "${QEMU_DTB}" >"${DTB}" |
| |
| # 128MiB (or RAM/2 if RAM<256MiB) is left to the kernel to decompress. |
| KERNEL_PAD_SIZE=$(min $(( RAM * MiB / 2 )) $(( 128 * MiB )) ) |
| # This is followed by the ramdisk and then 2MiB-aligned DTB. |
| KERNEL_PAD_SIZE=$(align_up_pow2 ${KERNEL_PAD_SIZE} $(( 2 * MiB ))) |
| # We place the pvmfw at the following page. |
| PVMFW_ADDR=$(( KERNEL_ADDR + KERNEL_PAD_SIZE + $(file_size "${DTB}") )) |
| PVMFW_ADDR=$(hex $(align_page_size ${PVMFW_ADDR})) |
| PVMFW_SIZE=$(file_size "${PVMFW}") |
| # pKVM enforces a page-aligned size for the memory slot |
| MEMSLOT_SIZE=$(align_page_size ${PVMFW_SIZE}) |
| |
| inject_overlay <(pvmfw_overlay ${PVMFW_ADDR} ${MEMSLOT_SIZE}) "${QEMU_DTB}"\ |
| >"${DTB}" |
| |
| CMD+=(-dtb "${DTB}") |
| CMD+=(-device loader,file="${PVMFW}",addr=${PVMFW_ADDR},force-raw=true) |
| fi |
| |
| if [ "${VERBOSE}" -eq 1 ]; then |
| set -x |
| fi |
| |
| # Invoke QEMU and then propagate its exit code. |
| # We do this instead of `exec` to delete TMP_FILES in the EXIT handler. |
| set +e; "${CMD[@]}"; exit $? |