From 903fd7aa01807f0394a8355a031a0b2361e04663 Mon Sep 17 00:00:00 2001
From: Florian Fuchs <fuchsfl@gmail.com>
Date: Thu, 8 Jan 2026 09:26:35 +0100
Subject: [PATCH] Support booting T2SDE ISOs better (#3468)

T2 uses zstd compressed kernel modules, where dm-mod also depends on
dax module. So the default fallback to only decompress dm-mod isn't
sufficient. So we manually uncompress dax.ko and dm-mod.ko and insmod
this, as default busybox modprobe/insmod doesn't support zstd modules.
---
 IMG/cpio/ventoy/hook/t2/disk_hook.sh | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/IMG/cpio/ventoy/hook/t2/disk_hook.sh b/IMG/cpio/ventoy/hook/t2/disk_hook.sh
index d3b79a43..b977f710 100644
--- a/IMG/cpio/ventoy/hook/t2/disk_hook.sh
+++ b/IMG/cpio/ventoy/hook/t2/disk_hook.sh
@@ -25,7 +25,19 @@ fi
 
 VTPATH_OLD=$PATH; PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
 
-modprobe dm-mod
+vtlog "Loading dax and dm-mod module ..."
+$BUSYBOX_PATH/modprobe dax      > /dev/null 2>&1
+$BUSYBOX_PATH/modprobe dm-mod   > /dev/null 2>&1
+
+if $GREP -q 'device-mapper' /proc/devices; then
+    vtlog "dm-mod module check success ..."
+else
+    vtlog "Need to extract dax and dm-mod module ..."
+    $VTOY_PATH/tool/zstdcat /lib/modules/$(uname -r)/drivers/dax/dax.ko.zst > $VTOY_PATH/extract_dax.ko
+    $BUSYBOX_PATH/insmod $VTOY_PATH/extract_dax.ko
+    $VTOY_PATH/tool/zstdcat /lib/modules/$(uname -r)/drivers/md/dm-mod.ko.zst > $VTOY_PATH/extract_dm_mod.ko
+    $BUSYBOX_PATH/insmod $VTOY_PATH/extract_dm_mod.ko
+fi
 
 wait_for_usb_disk_ready