# SPDX-License-Identifier: GPL-2.0## Copyright (c) 2023 MediaTek Inc.## Authors:#  Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com># import gdbimport refrom 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")         nr_vmap_nodes = gdb.parse_and_eval('nr_vmap_nodes')        for i in range(0, nr_vmap_nodes):            vn = gdb.parse_and_eval('&vmap_nodes[%d]' % i)            for vmap_area in lists.list_for_each_entry(vn['busy']['head'], 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()