tests: disassemble-aml.sh: generate AML in readable format

On systems where the IASL tool exists, we can convert
extected ACPI tables to ASL format, which is useful
for debugging and documentation purposes.
This script does this for all ACPI tables under tests/data/acpi/.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

tests/data/acpi/disassemle-aml.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/bash
+
+outdir=
+while getopts "o:" arg; do
+  case ${arg} in
+    o )
+        outdir=$OPTARG
+        ;;
+    \? )
+        echo "Usage: ./tests/data/acpi/disassemle-aml.sh [-o <output-directory>]"
+        exit 1
+        ;;
+
+  esac
+done
+
+for machine in tests/data/acpi/*
+do
+    if [[ ! -d "$machine" ]];
+    then
+        continue
+    fi
+
+    if [[ "${outdir}" ]];
+    then
+        mkdir -p "${outdir}"/${machine} || exit $?
+    fi
+    for aml in $machine/*
+    do
+        if [[ "$aml" == $machine/*.dsl ]];
+        then
+            continue
+        fi
+        if [[ "$aml" == $machine/SSDT*.* ]];
+        then
+            dsdt=${aml/SSDT*./DSDT.}
+            extra="-e ${dsdt}"
+        elif [[ "$aml" == $machine/SSDT* ]];
+        then
+            dsdt=${aml/SSDT*/DSDT};
+            extra="-e ${dsdt}"
+        else
+            extra=""
+        fi
+        asl=${aml}.dsl
+        if [[ "${outdir}" ]];
+        then
+            asl="${outdir}"/${machine}/${asl}
+        fi
+        iasl -d -p ${asl} ${extra} ${aml}
+    done
+done

tests/data/acpi/rebuild-expected-aml.sh

@@ -36,6 +36,7 @@ old_allowed_dif=`grep -v -e 'List of comma-separated changed AML files to ignore
 echo '/* List of comma-separated changed AML files to ignore */' > ${SRC_PATH}/tests/qtest/bios-tables-test-allowed-diff.h
 
 echo "The files were rebuilt and can be added to git."
+echo "You can use ${SRC_PATH}/tests/data/acpi/disassemle-aml.sh to disassemble them to ASL."
 
 if [ -z "$old_allowed_dif" ]; then
     echo "Note! Please do not commit expected files with source changes"