1# SPDX-License-Identifier: GPL-2.0
2#
3# Copyright (c) 2023 MediaTek Inc.
4#
5# Authors:
6#  Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
7#
8
9import gdb
10import re
11from linux import lists, utils, stackdepot, constants, mm
12
13if constants.LX_CONFIG_MMU:
14    vmap_area_type = utils.CachedType('struct vmap_area')
15    vmap_area_ptr_type = vmap_area_type.get_type().pointer()
16
17def is_vmalloc_addr(x):
18    pg_ops = mm.page_ops().ops
19    addr = pg_ops.kasan_reset_tag(x)
20    return addr >= pg_ops.VMALLOC_START and addr < pg_ops.VMALLOC_END
21
22class LxVmallocInfo(gdb.Command):
23    """Show vmallocinfo"""
24
25    def __init__(self):
26        super(LxVmallocInfo, self).__init__("lx-vmallocinfo", gdb.COMMAND_DATA)
27
28    def invoke(self, arg, from_tty):
29        if not constants.LX_CONFIG_MMU:
30            raise gdb.GdbError("Requires MMU support")
31
32        nr_vmap_nodes = gdb.parse_and_eval('nr_vmap_nodes')
33        for i in range(0, nr_vmap_nodes):
34            vn = gdb.parse_and_eval('&vmap_nodes[%d]' % i)
35            for vmap_area in lists.list_for_each_entry(vn['busy']['head'], vmap_area_ptr_type, "list"):
36                if not vmap_area['vm']:
37                    gdb.write("0x%x-0x%x %10d vm_map_ram\n" % (vmap_area['va_start'], vmap_area['va_end'],
38                        vmap_area['va_end'] - vmap_area['va_start']))
39                    continue
40                v = vmap_area['vm']
41                gdb.write("0x%x-0x%x %10d" % (v['addr'], v['addr'] + v['size'], v['size']))
42                if v['caller']:
43                    gdb.write(" %s" % str(v['caller']).split(' ')[-1])
44                if v['nr_pages']:
45                    gdb.write(" pages=%d" % v['nr_pages'])
46                if v['phys_addr']:
47                    gdb.write(" phys=0x%x" % v['phys_addr'])
48                if v['flags'] & constants.LX_VM_IOREMAP:
49                    gdb.write(" ioremap")
50                if v['flags'] & constants.LX_VM_ALLOC:
51                    gdb.write(" vmalloc")
52                if v['flags'] & constants.LX_VM_MAP:
53                    gdb.write(" vmap")
54                if v['flags'] & constants.LX_VM_USERMAP:
55                    gdb.write(" user")
56                if v['flags'] & constants.LX_VM_DMA_COHERENT:
57                    gdb.write(" dma-coherent")
58                if is_vmalloc_addr(v['pages']):
59                    gdb.write(" vpages")
60                gdb.write("\n")
61
62LxVmallocInfo()
63