cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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clk.py (2515B)

      1# SPDX-License-Identifier: GPL-2.0
      2#
      3# Copyright (c) NXP 2019
      4
      5import gdb
      6import sys
      7
      8from linux import utils, lists, constants
      9
     10clk_core_type = utils.CachedType("struct clk_core")
     11
     12
     13def clk_core_for_each_child(hlist_head):
     14    return lists.hlist_for_each_entry(hlist_head,
     15            clk_core_type.get_type().pointer(), "child_node")
     16
     17
     18class LxClkSummary(gdb.Command):
     19    """Print clk tree summary
     20
     21Output is a subset of /sys/kernel/debug/clk/clk_summary
     22
     23No calls are made during printing, instead a (c) if printed after values which
     24are cached and potentially out of date"""
     25
     26    def __init__(self):
     27        super(LxClkSummary, self).__init__("lx-clk-summary", gdb.COMMAND_DATA)
     28
     29    def show_subtree(self, clk, level):
     30        gdb.write("%*s%-*s %7d %8d %8d %11lu%s\n" % (
     31                level * 3 + 1, "",
     32                30 - level * 3,
     33                clk['name'].string(),
     34                clk['enable_count'],
     35                clk['prepare_count'],
     36                clk['protect_count'],
     37                clk['rate'],
     38                '(c)' if clk['flags'] & constants.LX_CLK_GET_RATE_NOCACHE else '   '))
     39
     40        for child in clk_core_for_each_child(clk['children']):
     41            self.show_subtree(child, level + 1)
     42
     43    def invoke(self, arg, from_tty):
     44        gdb.write("                                 enable  prepare  protect               \n")
     45        gdb.write("   clock                          count    count    count        rate   \n")
     46        gdb.write("------------------------------------------------------------------------\n")
     47        for clk in clk_core_for_each_child(gdb.parse_and_eval("clk_root_list")):
     48            self.show_subtree(clk, 0)
     49        for clk in clk_core_for_each_child(gdb.parse_and_eval("clk_orphan_list")):
     50            self.show_subtree(clk, 0)
     51
     52
     53LxClkSummary()
     54
     55
     56class LxClkCoreLookup(gdb.Function):
     57    """Find struct clk_core by name"""
     58
     59    def __init__(self):
     60        super(LxClkCoreLookup, self).__init__("lx_clk_core_lookup")
     61
     62    def lookup_hlist(self, hlist_head, name):
     63        for child in clk_core_for_each_child(hlist_head):
     64            if child['name'].string() == name:
     65                return child
     66            result = self.lookup_hlist(child['children'], name)
     67            if result:
     68                return result
     69
     70    def invoke(self, name):
     71        name = name.string()
     72        return (self.lookup_hlist(gdb.parse_and_eval("clk_root_list"), name) or
     73                self.lookup_hlist(gdb.parse_and_eval("clk_orphan_list"), name))
     74
     75
     76LxClkCoreLookup()