diff --git a/install.sh b/install.sh
index fa932bb..0c31a64 100755
--- a/install.sh
+++ b/install.sh
@@ -44,7 +44,7 @@ main()
             die "Files not found or unknown FW file layout $1 \n"
         fi
 
-        for sdir in sof sof-ipc4 sof-ace-tplg sof-tplg; do
+        for sdir in sof sof-ipc4 sof-ipc4-tplg sof-ace-tplg sof-tplg; do
             if test -e "$path/$sdir${optversuffix}" ; then
                 # Test workaround. Currently enough to run the whole test suite on Darwin
                 case "$(uname)" in
diff --git a/tarball_multi_releases.bash b/tarball_multi_releases.bash
index d3b6a84..220c807 100755
--- a/tarball_multi_releases.bash
+++ b/tarball_multi_releases.bash
@@ -125,6 +125,15 @@ main()
     check_symlinks "$archive_name" ||
         die "Found some broken symbolic links after combining\n"
 
+    # 2024.03 compatibility hack, add a symlink for sof-ace-tplg as per
+    # the compatibility note for Intel MTL in
+    # https://thesofproject.github.io/latest/getting_started/intel_debug/introduction.html#user-space-and-filesystem-requirements
+    ( cd "${archive_name}"
+      if test -e "sof-ipc4-tplg-WIP" -a ! -e "sof-ace-tplg-WIP" ; then
+          ln -s sof-ipc4-tplg sof-ace-tplg
+      fi
+    )
+
     # Rename sof-WIP -> sof-vX.Y, tools-WIP -> tools-vX.Y, ...
     ( cd "${archive_name}"
       set -e
diff --git a/tests/tests.bats b/tests/tests.bats
index 26d871d..9da8991 100644
--- a/tests/tests.bats
+++ b/tests/tests.bats
@@ -198,6 +198,10 @@ test_install_one_version()
 
     tar xf sof-bin-"$ver".tar.gz
 
+    # install.sh was updated in 2024.03, so it won't match
+    # anymore
+    git show v2023.12.1:install.sh > "$(pwd)/sof-bin-$ver"/install.sh
+
     diff -qr "$EXTR_REFS"/sof-bin-"$ver"  "$(pwd)/sof-bin-$ver"/
 
     popd || exit 1
diff --git a/v2.9.x/sof-ace-tplg-v2.9 b/v2.9.x/sof-ace-tplg-v2.9
new file mode 120000
index 0000000..e265e23
--- /dev/null
+++ b/v2.9.x/sof-ace-tplg-v2.9
@@ -0,0 +1 @@
+sof-ipc4-tplg-v2.9
\ No newline at end of file
diff --git a/v2.9.x/sof-ipc4-tplg-v2.9/sof-adl-rt711-4ch.tplg b/v2.9.x/sof-ipc4-tplg-v2.9/sof-adl-rt711-4ch.tplg
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diff --git a/v2.9.x/sof-ipc4-tplg-v2.9/sof-imx8mp-wm8960.tplg b/v2.9.x/sof-ipc4-tplg-v2.9/sof-imx8mp-wm8960.tplg
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new file mode 120000
index 0000000..10347dc
--- /dev/null
+++ b/v2.9.x/sof-ipc4-v2.9/adl-n/community/sof-adl-n.ri
@@ -0,0 +1 @@
+../../tgl/community/sof-tgl.ri
\ No newline at end of file
diff --git a/v2.9.x/sof-ipc4-v2.9/adl-n/intel-signed/sof-adl-n.ri b/v2.9.x/sof-ipc4-v2.9/adl-n/intel-signed/sof-adl-n.ri
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--- /dev/null
+++ b/v2.9.x/sof-ipc4-v2.9/adl-n/sof-adl-n.ri
@@ -0,0 +1 @@
+intel-signed/sof-adl-n.ri
\ No newline at end of file
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+++ b/v2.9.x/sof-ipc4-v2.9/adl-s/community/sof-adl-s.ri
@@ -0,0 +1 @@
+../../tgl-h/community/sof-tgl-h.ri
\ No newline at end of file
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+intel-signed/sof-adl-s.ri
\ No newline at end of file
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+../../tgl/community/sof-tgl.ri
\ No newline at end of file
diff --git a/v2.9.x/sof-ipc4-v2.9/adl/intel-signed/sof-adl.ri b/v2.9.x/sof-ipc4-v2.9/adl/intel-signed/sof-adl.ri
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diff --git a/v2.9.x/sof-ipc4-v2.9/adl/sof-adl.ri b/v2.9.x/sof-ipc4-v2.9/adl/sof-adl.ri
new file mode 120000
index 0000000..2fde46f
--- /dev/null
+++ b/v2.9.x/sof-ipc4-v2.9/adl/sof-adl.ri
@@ -0,0 +1 @@
+intel-signed/sof-adl.ri
\ No newline at end of file
diff --git a/v2.9.x/sof-ipc4-v2.9/mtl/community/sof-mtl.ri b/v2.9.x/sof-ipc4-v2.9/mtl/community/sof-mtl.ri
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new file mode 120000
index 0000000..3d21fe5
--- /dev/null
+++ b/v2.9.x/sof-ipc4-v2.9/mtl/sof-mtl.ri
@@ -0,0 +1 @@
+intel-signed/sof-mtl.ri
\ No newline at end of file
diff --git a/v2.9.x/sof-ipc4-v2.9/rpl-s/community/sof-rpl-s.ri b/v2.9.x/sof-ipc4-v2.9/rpl-s/community/sof-rpl-s.ri
new file mode 120000
index 0000000..dc81868
--- /dev/null
+++ b/v2.9.x/sof-ipc4-v2.9/rpl-s/community/sof-rpl-s.ri
@@ -0,0 +1 @@
+../../tgl-h/community/sof-tgl-h.ri
\ No newline at end of file
diff --git a/v2.9.x/sof-ipc4-v2.9/rpl-s/intel-signed/sof-rpl-s.ri b/v2.9.x/sof-ipc4-v2.9/rpl-s/intel-signed/sof-rpl-s.ri
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new file mode 120000
index 0000000..98063db
--- /dev/null
+++ b/v2.9.x/sof-ipc4-v2.9/rpl-s/sof-rpl-s.ri
@@ -0,0 +1 @@
+intel-signed/sof-rpl-s.ri
\ No newline at end of file
diff --git a/v2.9.x/sof-ipc4-v2.9/rpl/community/sof-rpl.ri b/v2.9.x/sof-ipc4-v2.9/rpl/community/sof-rpl.ri
new file mode 120000
index 0000000..10347dc
--- /dev/null
+++ b/v2.9.x/sof-ipc4-v2.9/rpl/community/sof-rpl.ri
@@ -0,0 +1 @@
+../../tgl/community/sof-tgl.ri
\ No newline at end of file
diff --git a/v2.9.x/sof-ipc4-v2.9/rpl/intel-signed/sof-rpl.ri b/v2.9.x/sof-ipc4-v2.9/rpl/intel-signed/sof-rpl.ri
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new file mode 120000
index 0000000..04f1736
--- /dev/null
+++ b/v2.9.x/sof-ipc4-v2.9/rpl/sof-rpl.ri
@@ -0,0 +1 @@
+intel-signed/sof-rpl.ri
\ No newline at end of file
diff --git a/v2.9.x/sof-ipc4-v2.9/tgl-h/community/sof-tgl-h.ri b/v2.9.x/sof-ipc4-v2.9/tgl-h/community/sof-tgl-h.ri
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diff --git a/v2.9.x/sof-ipc4-v2.9/tgl-h/sof-tgl-h.ri b/v2.9.x/sof-ipc4-v2.9/tgl-h/sof-tgl-h.ri
new file mode 120000
index 0000000..1a6e2b1
--- /dev/null
+++ b/v2.9.x/sof-ipc4-v2.9/tgl-h/sof-tgl-h.ri
@@ -0,0 +1 @@
+intel-signed/sof-tgl-h.ri
\ No newline at end of file
diff --git a/v2.9.x/sof-ipc4-v2.9/tgl/community/sof-tgl.ri b/v2.9.x/sof-ipc4-v2.9/tgl/community/sof-tgl.ri
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diff --git a/v2.9.x/sof-ipc4-v2.9/tgl/intel-signed/sof-tgl.ri b/v2.9.x/sof-ipc4-v2.9/tgl/intel-signed/sof-tgl.ri
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diff --git a/v2.9.x/sof-ipc4-v2.9/tgl/sof-tgl.ri b/v2.9.x/sof-ipc4-v2.9/tgl/sof-tgl.ri
new file mode 120000
index 0000000..975fa79
--- /dev/null
+++ b/v2.9.x/sof-ipc4-v2.9/tgl/sof-tgl.ri
@@ -0,0 +1 @@
+intel-signed/sof-tgl.ri
\ No newline at end of file
diff --git a/v2.9.x/tools-v2.9/mtrace-reader.py b/v2.9.x/tools-v2.9/mtrace-reader.py
new file mode 100755
index 0000000..06b005a
--- /dev/null
+++ b/v2.9.x/tools-v2.9/mtrace-reader.py
@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# Copyright (c) 2022, Intel Corporation. All rights reserved.
+
+#pylint:disable=mixed-indentation
+
+# Tool to stream data from Linux SOF driver "mtrace" debugfs
+# interface to standard output. Plain "cat" is not sufficient
+# as each read() syscall returns log data with a 32bit binary
+# header, containing the payload length.
+
+import struct
+import os
+import sys
+
+READ_BUFFER = 16384
+MTRACE_FILE = "/sys/kernel/debug/sof/mtrace/core0"
+
+fd = os.open(MTRACE_FILE, os.O_RDONLY)
+while fd >= 0:
+    # direct unbuffered os.read() must be used to comply with
+    # debugfs protocol used. each non-zero read will return
+    # a buffer containing a 32bit header and a payload
+    read_bytes = os.read(fd, READ_BUFFER)
+
+    # handle end-of-file
+    if len(read_bytes) == 0:
+        continue
+
+    if len(read_bytes) <= 4:
+        continue
+
+    header = struct.unpack('I', read_bytes[0:4])
+    data_len = header[0]
+    data = read_bytes[4:4+data_len]
+
+    os.write(sys.stdout.fileno(), data)
diff --git a/v2.9.x/tools-v2.9/sof-ctl b/v2.9.x/tools-v2.9/sof-ctl
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diff --git a/v2.9.x/tools-v2.9/sof-probes b/v2.9.x/tools-v2.9/sof-probes
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