[PATCH v2] tests: disassemble-aml.sh: generate AML in readable format

["Michael S. Tsirkin" <mst@redhat.com>]

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>
---

changes from v1:
    - suggest the script from rebuild-expected-aml.sh
    - fix subject typo

 tests/data/acpi/disassemle-aml.sh       | 52 +++++++++++++++++++++++++
 tests/data/acpi/rebuild-expected-aml.sh |  1 +
 2 files changed, 53 insertions(+)
 create mode 100755 tests/data/acpi/disassemle-aml.sh

diff --git a/tests/data/acpi/disassemle-aml.sh b/tests/data/acpi/disassemle-aml.sh
new file mode 100755
index 0000000000..1d8a4d0301
--- /dev/null
+++ b/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
diff --git a/tests/data/acpi/rebuild-expected-aml.sh b/tests/data/acpi/rebuild-expected-aml.sh
index 9cbaab1a4d..76cd797d1e 100755
--- a/tests/data/acpi/rebuild-expected-aml.sh
+++ b/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"
-- 
MST