1 files changed, 60 insertions, 0 deletions
diff --git a/scripts/gdb/linux/vmalloc.py b/scripts/gdb/linux/vmalloc.py
new file mode 100644
index 000000000000..d3c8a0274d1e
--- /dev/null
+++ b/scripts/gdb/linux/vmalloc.py
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2023 MediaTek Inc.
+#
+# Authors:
+#  Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
+#
+
+import gdb
+import re
+from linux import lists, utils, stackdepot, constants, mm
+
+if constants.LX_CONFIG_MMU:
+    vmap_area_type = utils.CachedType('struct vmap_area')
+    vmap_area_ptr_type = vmap_area_type.get_type().pointer()
+
+def is_vmalloc_addr(x):
+    pg_ops = mm.page_ops().ops
+    addr = pg_ops.kasan_reset_tag(x)
+    return addr >= pg_ops.VMALLOC_START and addr < pg_ops.VMALLOC_END
+
+class LxVmallocInfo(gdb.Command):
+    """Show vmallocinfo"""
+
+    def __init__(self):
+        super(LxVmallocInfo, self).__init__("lx-vmallocinfo", gdb.COMMAND_DATA)
+
+    def invoke(self, arg, from_tty):
+        if not constants.LX_CONFIG_MMU:
+            raise gdb.GdbError("Requires MMU support")
+
+        vmap_area_list = gdb.parse_and_eval('vmap_area_list')
+        for vmap_area in lists.list_for_each_entry(vmap_area_list, vmap_area_ptr_type, "list"):
+            if not vmap_area['vm']:
+                gdb.write("0x%x-0x%x %10d vm_map_ram\n" % (vmap_area['va_start'], vmap_area['va_end'],
+                    vmap_area['va_end'] - vmap_area['va_start']))
+                continue
+            v = vmap_area['vm']
+            gdb.write("0x%x-0x%x %10d" % (v['addr'], v['addr'] + v['size'], v['size']))
+            if v['caller']:
+                gdb.write(" %s" % str(v['caller']).split(' ')[-1])
+            if v['nr_pages']:
+                gdb.write(" pages=%d" % v['nr_pages'])
+            if v['phys_addr']:
+                gdb.write(" phys=0x%x" % v['phys_addr'])
+            if v['flags'] & constants.LX_VM_IOREMAP:
+                gdb.write(" ioremap")
+            if v['flags'] & constants.LX_VM_ALLOC:
+                gdb.write(" vmalloc")
+            if v['flags'] & constants.LX_VM_MAP:
+                gdb.write(" vmap")
+            if v['flags'] & constants.LX_VM_USERMAP:
+                gdb.write(" user")
+            if v['flags'] & constants.LX_VM_DMA_COHERENT:
+                gdb.write(" dma-coherent")
+            if is_vmalloc_addr(v['pages']):
+                gdb.write(" vpages")
+            gdb.write("\n")
+
+LxVmallocInfo()