sample: add sample script for launching xenomai RTVM
Add a launch script for xenomai RTVM. Tracked-On: #4514 Signed-off-by: Tw <wei.tan@intel.com> Reviewed-by: Binbin Wu <binbin.wu@intel.com>
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Tw
wenlingz
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793e22a87a
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#!/bin/bash
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# Copyright (C) 2020 Intel Corporation.
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# SPDX-License-Identifier: BSD-3-Clause
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# set -x
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usage()
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{
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echo "$0 [-b disk | -f img] [-k kernel.tar.gz] {-n ethernet} {-B mem_size}"
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echo " example:"
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echo " $0 -b /dev/sdb3 -k ~/linux-4.19.tar.gz -n eth0"
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echo " $0 -f clearlinux.img -k ../linux-5.2.tar -n eth0 -B 512M"
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exit
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}
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function get_bdf()
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{
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IFS=/
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for dir in $1; do
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case $dir in 0000:??:??.?)
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bdf=$dir;;
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esac
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done
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unset IFS
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echo $bdf
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}
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modprobe pci_stub
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# pci devices for passthru
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dev_opts=
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declare -A passthru_devs
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guest_pci_nr=2
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function passthru_pci_devs()
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{
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for dev in "${passthrus[@]}"
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do
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dev_info=$(find /sys/devices/pci* -name $(basename $dev))
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dev_bdf=$(get_bdf $dev_info)
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dev_path=$(echo $dev_info | sed "s/$dev_bdf\(.*\)//g")$dev_bdf
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dev_vendor_id=$(cat $dev_path/vendor | sed 's/0x//g')
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dev_device_id=$(cat $dev_path/device | sed 's/0x//g')
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dev_bus=$(echo ${dev_bdf#0000:}|sed "s/:.*//g")
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dev_dev=$(echo $dev_bdf|sed "s/.*://g"|sed "s/\..*//g")
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dev_fun=$(echo $dev_bdf|sed "s/.*\.//g")
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dev_drv=$(lspci -k -s $dev_bdf | grep "Kernel driver in use"|sed "s/.*: //g")
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dev_passthru_opt="-s $guest_pci_nr,passthru,$dev_bus/$dev_dev/$dev_fun"
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echo "passthrough a pci device:"
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echo dev_info:$dev_info
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echo dev_path:$dev_path
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echo dev_vendor_id:$dev_vendor_id
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echo dev_device_id:$dev_device_id
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echo dev_bus:$dev_bus
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echo dev_dev:$dev_dev
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echo dev_fun:$dev_fun
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echo dev_drv:$dev_drv
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echo dev_passthru_opt:$dev_passthru_opt
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# replace its driver with pci-stub
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echo "$dev_vendor_id $dev_device_id" > /sys/bus/pci/drivers/pci-stub/new_id
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echo $dev_bdf > $dev_path/driver/unbind
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echo $dev_bdf > /sys/bus/pci/drivers/pci-stub/bind
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# add to global options
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dev_opts="$dev_opts $dev_passthru_opt"
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# register for de-passthrough later
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passthru_devs[$dev_bdf]=$dev_drv
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# increase virtual pci slot number
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guest_pci_nr=$(expr $guest_pci_nr + 1)
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done
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}
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function de_passthru_pci_devs()
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{
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for dev_bdf in "${!passthru_devs[@]}"
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do
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echo $dev_bdf > /sys/bus/pci/drivers/pci-stub/unbind
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echo $dev_bdf > /sys/bus/pci/drivers/${passthru_devs[$dev_bdf]}/bind
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done
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}
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# restore pci device driver on exit
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trap de_passthru_pci_devs EXIT
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mem_size=1024M
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eth=
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disk=
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img=
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kernel=
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passthrus=()
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while getopts hn:b:f:k:B: opt
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do
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case "${opt}" in
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h)
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usage;
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;;
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n)
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eth=${OPTARG}
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passthrus+=($eth)
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;;
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b)
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disk="${OPTARG}"
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passthrus+=($disk)
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;;
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f)
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img="${OPTARG}"
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;;
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k)
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kernel="${OPTARG}"
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;;
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B)
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mem_size="${OPTARG}"
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;;
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?)
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echo "{OPTARG}"
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;;
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esac
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done
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if [[ ( -z "${kernel}") || (( -z "${disk}") && ( -z "${img}" )) ]]; then
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usage; exit 1
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fi
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# create a unique tap device for each VM
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if [ -z $eth ];then
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tap=tap_rtvm
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tap_exist=$(ip a | grep "$tap" | awk '{print $1}')
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if [ "$tap_exist"x != "x" ]; then
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echo "tap device existed, reuse $tap"
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else
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ip tuntap add dev $tap mode tap
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ip link set "$tap" master acrn-br0
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ip link set dev "$tap" down
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ip link set dev "$tap" up
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fi
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dev_opts="$dev_opts -s $guest_pci_nr,virtio-net,$tap"
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guest_pci_nr=$(expr $guest_pci_nr + 1)
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fi
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function launch_hard_rt_vm()
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{
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mkdir -p /mnt
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if [ ! -z $img ]; then
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# mount virtual disk (assuming the last partition is root)
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vdisk=$(losetup -f -P --show $img)
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vdisk_root=$(ls -1 ${vdisk}p* | tail -1)
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mount $vdisk_root /mnt
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# extract the kernel and install kernel modules
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bzImage=/mnt/$(tar xzvf $kernel -C /mnt --dereference --exclude=vmlinux* | grep vmlinuz)
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cp $bzImage /tmp/bzImage.xenomai
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# umount disk
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umount /mnt
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losetup -d $vdisk
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# find appropriate root partition information
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disk_part_nr=$(basename $vdisk_root| sed 's/.*p\([0-9]$\)/\1/')
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vdisk=/dev/vda$disk_part_nr
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dev_opts="$dev_opts -s $guest_pci_nr,virtio-blk,$img"
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guest_pci_nr=$(expr $guest_pci_nr + 1)
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elif [ ! -z $disk ];then
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# mount the physical disk
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mount $disk /mnt
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# extract the kernel and install kernel modules
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bzImage=/mnt/$(tar xzvf $kernel -C /mnt --dereference --exclude=vmlinux* | grep vmlinuz)
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cp $bzImage /tmp/bzImage.xenomai
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# umount disk
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umount /mnt
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# detect partition information
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disk_part_nr=$(basename $disk| sed 's/.*\([0-9]$\)/\1/')
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if grep -q "nvme" "$disk"; then
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vdisk=/dev/nvme0n1p$disk_part_nr
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else
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vdisk=/dev/sda$disk_part_nr
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fi
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fi
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passthru_pci_devs
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/usr/bin/acrn-dm -A -m $mem_size -s 0:0,hostbridge \
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-k /tmp/bzImage.xenomai \
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-U 495ae2e5-2603-4d64-af76-d4bc5a8ec0e5 \
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--lapic_pt \
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--rtvm \
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--virtio_poll 1000000 \
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-s 1,virtio-console,@stdio:stdio_port \
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$dev_opts \
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-B "root=$vdisk rw rootwait nohpet console=hvc0 consoleblank=0 \
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no_timer_check ignore_loglevel log_buf_len=16M nmi_watchdog=0 nosoftlockup \
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processor.max_cstate=0 intel_idle.max_cstate=0 intel_pstate=disable idle=poll \
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rcu_nocb_poll isolcpus=1 nohz_full=1 rcu_nocbs=1 \
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tsc=reliable x2apic_phys xenomai.supported_cpus=2 irqaffinity=0 mce=off" hard_rtvm
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}
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# offline SOS CPUs except BSP before launch UOS
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for i in `ls -d /sys/devices/system/cpu/cpu[1-99]`; do
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online=`cat $i/online`
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idx=`echo $i | tr -cd "[1-99]"`
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echo cpu$idx online=$online
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if [ "$online" = "1" ]; then
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echo 0 > $i/online
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echo $idx > /sys/class/vhm/acrn_vhm/offline_cpu
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fi
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done
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echo 3 > /sys/kernel/debug/dri/0/i915_cache_sharing
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echo 300 > /sys/class/drm/card0/gt_max_freq_mhz
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echo 300 > /sys/class/drm/card0/gt_min_freq_mhz
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echo 300 > /sys/class/drm/card0/gt_boost_freq_mhz
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launch_hard_rt_vm
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