mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 10:15:57 +01:00
2eff007f7c
Don't pass -e on checkpoint restore. Add benchmarks to how much GEM5 is slower than QEMU. Rename Kernel boot command line arguments to match kernel docs name. Document how to pass extra options to GEM5. Start listing interesting benchmarks to run on GEM5. Add an openmp hello world.
175 lines
4.4 KiB
Bash
Executable File
175 lines
4.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -e
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# CLI handling.
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arch=x86_64
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debug_vm=''
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kgdb=false
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nographic=false
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# norandmaps: Don't use address space randomization. Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space.
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# printk.time=y: log in format: "[time ] msg" for all printk messages.
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# nokaslr: https://unix.stackexchange.com/questions/397939/turning-off-kaslr-to-debug-linux-kernel-using-qemu-and-gdb
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# Turned on by default since v4.12
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extra_append='nokaslr norandmaps printk.devkmsg=on printk.time=y'
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extra_flags=''
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gem5=false
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gem5opts=''
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initrd=false
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root=''
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while getopts a:Dde:G:giknt:x OPT; do
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case "$OPT" in
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a)
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arch="$OPTARG"
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;;
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d)
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extra_flags="$extra_flags -S -s"
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;;
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D)
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debug_vm='gdb -q -ex start --args'
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;;
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e)
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extra_append="$extra_append $OPTARG"
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;;
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k)
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extra_append="$extra_append kgdbwait"
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# For those who want to try KDB.
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#extra_append="$extra_append kgdbwait kgdboc=kbd"
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extra_flags="$extra_flags -serial tcp::1234,server,nowait"
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kgdb=true
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;;
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g)
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gem5=true
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;;
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G)
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gem5opts="$OPTARG"
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;;
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i)
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initrd=true
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;;
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n)
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extra_append="$extra_append console=ttyS0"
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extra_flags="$extra_flags -nographic"
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nographic=true
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;;
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esac
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done
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shift "$(($OPTIND - 1))"
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extra_flags="$extra_flags $@"
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if $gem5; then
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outdir="$(pwd)/buildroot/output.${arch}-gem5~"
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gem5_dir="$(pwd)/gem5/gem5"
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if [ "$arch" = x86_64 ]; then
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cmd="\
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M5_PATH='$(pwd)/gem5/gem5-system' \
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'${gem5_dir}/build/X86/gem5.opt' \
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${gem5opts} \
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'${gem5_dir}/configs/example/fs.py' \
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--disk-image='${outdir}/images/rootfs.ext2' \
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--kernel='${outdir}/build/linux-custom/vmlinux' \
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--root-device=/dev/sda \
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$extra_flags \
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"
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elif [ "$arch" = arm ] || [ "$arch" = aarch64 ]; then
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cmd="\
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M5_PATH='$(pwd)/gem5/gem5-system' \
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$debug_vm \
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'${gem5_dir}/build/ARM/gem5.opt' \
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${gem5opts} \
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'${gem5_dir}/configs/example/fs.py' \
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--command-line='earlyprintk=pl011,0x1c090000 console=ttyAMA0 lpj=19988480 rw loglevel=8 mem=512MB root=/dev/sda $extra_append' \
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--disk-image='${outdir}/images/rootfs.ext2' \
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--dtb-file='${gem5_dir}/system/arm/dt/$([ "$arch" = arm ] && echo armv7_gem5_v1_1cpu || echo armv8_gem5_v1_1cpu).dtb' \
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--kernel='${outdir}/build/linux-custom/vmlinux' \
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--machine-type=VExpress_GEM5_V1 \
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$extra_flags \
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"
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fi
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else
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buildroot_out_dir="./buildroot/output.${arch}~"
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images_dir="$buildroot_out_dir/images"
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qemu_common="\
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$debug_vm \
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$buildroot_out_dir/host/usr/bin/qemu-system-${arch} \
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-m 128M \
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-monitor telnet::45454,server,nowait \
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-netdev user,hostfwd=tcp::45455-:45455,id=net0 \
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-smp 1 \
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"
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if $initrd; then
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extra_flags="$extra_flags -initrd '${images_dir}/rootfs.cpio'"
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fi
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# The base QEMU commands are found under board/qemu/*/readme.tx
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case "$arch" in
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x86_64)
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if $kgdb; then
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extra_append="$extra_append kgdboc=ttyS0,115200"
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fi
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if ! $initrd; then
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root='root=/dev/vda'
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extra_flags="$extra_flags -drive file='${images_dir}/rootfs.ext2.qcow2,if=virtio,format=qcow2'"
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fi
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cmd="$qemu_common \
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-M pc \
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-append '$root nopat $extra_append' \
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-device edu \
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-device lkmc_pci_min \
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-device virtio-net-pci,netdev=net0 \
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-kernel ${images_dir}/bzImage \
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$extra_flags \
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"
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;;
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arm)
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if $kgdb; then
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extra_append="$extra_append kgdboc=ttyAMA0,115200"
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fi
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if ! $initrd; then
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root='root=/dev/sda'
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extra_flags="$extra_flags -drive file='${images_dir}/rootfs.ext2.qcow2,if=scsi,format=qcow2'"
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fi
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cmd="$qemu_common \
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-M versatilepb \
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-append '$root $extra_append' \
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-device rtl8139,netdev=net0 \
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-dtb ${images_dir}/versatile-pb.dtb \
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-kernel ${images_dir}/zImage \
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-serial stdio \
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$extra_flags \
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"
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;;
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aarch64)
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if $kgdb; then
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extra_append="$extra_append kgdboc=ttyAMA0,115200"
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fi
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cmd="$qemu_common \
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-M virt \
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-append 'root=/dev/sda $extra_append' \
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-cpu cortex-a57 \
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-device virtio-net-device,netdev=net0 \
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-kernel ${images_dir}/Image \
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-nographic \
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-serial stdio \
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$extra_flags \
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"
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;;
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mips64)
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if ! $initrd; then
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root='root=/dev/hda'
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extra_flags="$extra_flags -drive file='${images_dir}/rootfs.ext2.qcow2,format=qcow2'"
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fi
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cmd="$qemu_common \
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-M malta \
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-append 'root=/dev/hda $extra_append' \
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-cpu I6400 \
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-device pcnet \
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-kernel ${images_dir}/vmlinux \
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-nographic \
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$extra_flags \
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"
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;;
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esac
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fi
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echo "$cmd" | tee run.log
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eval "$cmd"
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