Create data/ dir, move cli, 9p and readfile there.

.gitignore

@@ -6,5 +6,5 @@
 gitignore*
 
 # Specific files.
+/data
 /out
-/9p

README.adoc

@@ -117,10 +117,10 @@ It gets annoying to retype `-a aarch64` for every single command, or to remember
 So simplify that, do:
 
 ....
-cp cli.gitignore.example cli.gitignore
+cp cli.example data/cli
 ....
 
-and then edit the `cli.gitignore` file to your needs.
+and then edit the `data/cli` file to your needs.
 
 That file is used to pass extra command line arguments to most of our utilities.
 
@@ -1960,7 +1960,7 @@ TODO performance compared to NFS.
 As usual, we have already set everything up for you. On host:
 
 ....
-cd 9p
+cd data/9p
 uname -a > host
 ....
 
@@ -2401,17 +2401,17 @@ arch=aarch64
 
 # Generate a checkpoint after Linux boots.
 # The boot takes a while, be patient young Padawan.
-printf 'm5 exit' >readfile.gitignore
+printf 'm5 exit' >data/readfile
 ./run -a "$arch" -g -E 'm5 checkpoint;m5 readfile > a.sh;sh a.sh'
 
 # Restore the checkpoint, and run the benchmark with parameter 1.000.
 # We skip the boot completely, saving time!
-printf 'm5 resetstats;dhrystone 1000;m5 exit' >readfile.gitignore
+printf 'm5 resetstats;dhrystone 1000;m5 exit' >data/readfile
 ./run -a "$arch" -g -- -r 1
 ./gem5-stat -a "$arch"
 
 # Now with another parameter 10.000.
-printf 'm5 resetstats;dhrystone 10000;m5 exit' >readfile.gitignore
+printf 'm5 resetstats;dhrystone 10000;m5 exit' >data/readfile
 ./run -a "$arch" -g -- -r 1
 ./gem5-stat -a "$arch"
 ....
@@ -3036,11 +3036,11 @@ The problem is that after the checkpoint, the memory and disk states are fixed,
 There is however one loophole: <<m5-readfile>>, which reads whatever is present on the host, so we can do it like:
 
 ....
-printf 'echo "setup run";m5 exit' >readfile.gitignore
+printf 'echo "setup run";m5 exit' >data/readfile
 ./run -a aarch64 -g -E 'm5 checkpoint;m5 readfile > a.sh;sh a.sh'
-printf 'echo "first benchmark";m5 exit' >readfile.gitignore
+printf 'echo "first benchmark";m5 exit' >data/readfile
 ./run -a aarch64 -g -- -r 1
-printf 'echo "second benchmark";m5 exit' >readfile.gitignore
+printf 'echo "second benchmark";m5 exit' >data/readfile
 ./run -a aarch64 -g -- -r 1
 ....
 
@@ -3382,7 +3382,7 @@ https://stackoverflow.com/questions/49516399/how-to-use-m5-readfile-and-m5-execf
 Host:
 
 ....
-date > readfile.gitignore
+date > data/readfile
 ....
 
 Guest:
@@ -3397,7 +3397,7 @@ Host:
 
 ....
 printf '#!/bin/sh
-echo asdf' > readfile.gitignore
+echo asdf' > data/readfile
 ....
 
 Guest:
@@ -3973,6 +3973,9 @@ then `dtc a.dts` gives:
 
 === Directory structure
 
+* `/data`: gitignored user created data. Deleting this might lead to loss of data. Of course, if something there becomes is important enough to you, git track it.
+* `/out`: gitignored Build outputs. You won't lose data by deleting this folder since everything there can be re-generated, only time.
+
 :leveloffset: +3
 
 include::buildroot_patches/README.adoc[]

build

@@ -159,11 +159,10 @@ BR2_ROOTFS_POST_SCRIPT_ARGS=\"$post_script_args\"
   make O="$buildroot_out_dir" olddefconfig
 fi
 
-# Build.
 mkdir -p \
   "${gem5_out_dir}" \
   "${qemu_out_dir}" \
-  "${root_dir}/9p" \
+  "${p9_dir}" \
 ;
 cd "${buildroot_dir}"
 # HOST_QEMU_OPTS is a hack that happens to work because the QEMU package luckly uses += at all times.

common

@@ -17,8 +17,11 @@ set_common_vars() {
 }
 root_dir="$(pwd)"
 out_dir="${root_dir}/out"
+data_dir="${root_dir}/data"
+p9_dir="${data_dir}/9p"
+readfile_file="${data_dir}/readfile"
 common_dir="${out_dir}/common"
-f=cli.gitignore
+f="${data_dir}/cli"
 if [ -f "$f" ]; then
   . "$f"
 fi

gem5-bench-cache

@@ -20,7 +20,7 @@ result_file="${gem5_out_dir}/bench-cache.txt"
 
 bench() (
   cmd="$1"
-  eeval "$cmd" "$result_file"
+  ./eeval "$cmd" "$result_file"
   ./gem5-ncycles -a "$arch" >> "$result_file"
 )
 
@@ -39,25 +39,25 @@ rm -rf \
 ;
 
 # Create the checkpoints after the kernel boot.
-printf 'm5 exit' >readfile.gitignore
-eeval "$cmd $cpt"
-eeval "$cmd $cpt -- $cache_small"
-eeval "$cmd $cpt -- $cache_large"
-eeval "$cmd $cpt -- $cache_small --cpu-type=HPI"
-eeval "$cmd $cpt -- $cache_large --cpu-type=HPI"
+printf 'm5 exit' >"${readfile_file}"
+./eeval "$cmd $cpt"
+./eeval "$cmd $cpt -- $cache_small"
+./eeval "$cmd $cpt -- $cache_large"
+./eeval "$cmd $cpt -- $cache_small --cpu-type=HPI"
+./eeval "$cmd $cpt -- $cache_large --cpu-type=HPI"
 
 # dhrystone 1.000
 printf '#!/bin/sh
 m5 resetstats
 dhrystone 1000
 m5 exit
-' >readfile.gitignore
+' >"${readfile_file}"
 bench-all
 
 # dhrystone 10.000
-sed -Ei 's/^dhrystone .*/dhrystone 10000/' readfile.gitignore
+sed -Ei 's/^dhrystone .*/dhrystone 10000/' "${readfile_file}"
 bench-all
 
 # dhrystone 100.000
-sed -Ei 's/^dhrystone .*/dhrystone 100000/' readfile.gitignore
+sed -Ei 's/^dhrystone .*/dhrystone 100000/' "${readfile_file}"
 bench-all

run

@@ -143,7 +143,7 @@ ${gem5opts} \
 --kernel='${buildroot_out_dir}/build/linux-custom/vmlinux' \
 --mem-size=${memory} \
 --num-cpus='${cpus}' \
---script='${root_dir}/readfile.gitignore' \
+--script='${readfile_file}' \
 "
   if [ "$arch" = x86_64 ]; then
     if "$kvm"; then
@@ -173,13 +173,13 @@ else
 ${debug_vm} \
 '${buildroot_out_dir}/host/usr/bin/qemu-system-${arch}' \
 -gdb tcp::1234 \
--m ${memory} \
+-m '${memory}' \
 -monitor telnet::45454,server,nowait \
 -netdev user,hostfwd=tcp::45455-:45455,hostfwd=tcp::45456-:22,id=net0 \
--smp ${cpus} \
--trace enable=${trace_enable},file='${qemu_out_dir}/trace.bin' \
--virtfs local,path=9p,mount_tag=host_scratch,security_model=mapped,id=host_scratch \
--virtfs local,path=${buildroot_out_dir}/build,mount_tag=host_out,security_model=mapped,id=host_out \
+-smp '${cpus}' \
+-trace 'enable=${trace_enable},file=${qemu_out_dir}/trace.bin' \
+-virtfs 'local,path=${p9_dir},mount_tag=host_scratch,security_model=mapped,id=host_scratch' \
+-virtfs 'local,path=${buildroot_out_dir}/build,mount_tag=host_out,security_model=mapped,id=host_out' \
 "
   if "$initrd"; then
     extra_flags="${extra_flags} -initrd '${images_dir}/rootfs.cpio'"