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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genpd.py (2583B)

      1# SPDX-License-Identifier: GPL-2.0
      2#
      3# Copyright (c) NXP 2019
      4
      5import gdb
      6import sys
      7
      8from linux.utils import CachedType
      9from linux.lists import list_for_each_entry
     10
     11generic_pm_domain_type = CachedType('struct generic_pm_domain')
     12pm_domain_data_type = CachedType('struct pm_domain_data')
     13device_link_type = CachedType('struct device_link')
     14
     15
     16def kobject_get_path(kobj):
     17    path = kobj['name'].string()
     18    parent = kobj['parent']
     19    if parent:
     20        path = kobject_get_path(parent) + '/' + path
     21    return path
     22
     23
     24def rtpm_status_str(dev):
     25    if dev['power']['runtime_error']:
     26        return 'error'
     27    if dev['power']['disable_depth']:
     28        return 'unsupported'
     29    _RPM_STATUS_LOOKUP = [
     30        "active",
     31        "resuming",
     32        "suspended",
     33        "suspending"
     34    ]
     35    return _RPM_STATUS_LOOKUP[dev['power']['runtime_status']]
     36
     37
     38class LxGenPDSummary(gdb.Command):
     39    '''Print genpd summary
     40
     41Output is similar to /sys/kernel/debug/pm_genpd/pm_genpd_summary'''
     42
     43    def __init__(self):
     44        super(LxGenPDSummary, self).__init__('lx-genpd-summary', gdb.COMMAND_DATA)
     45
     46    def summary_one(self, genpd):
     47        if genpd['status'] == 0:
     48            status_string = 'on'
     49        else:
     50            status_string = 'off-{}'.format(genpd['state_idx'])
     51
     52        child_names = []
     53        for link in list_for_each_entry(
     54                genpd['parent_links'],
     55                device_link_type.get_type().pointer(),
     56                'parent_node'):
     57            child_names.append(link['child']['name'])
     58
     59        gdb.write('%-30s  %-15s %s\n' % (
     60                genpd['name'].string(),
     61                status_string,
     62                ', '.join(child_names)))
     63
     64        # Print devices in domain
     65        for pm_data in list_for_each_entry(genpd['dev_list'],
     66                        pm_domain_data_type.get_type().pointer(),
     67                        'list_node'):
     68            dev = pm_data['dev']
     69            kobj_path = kobject_get_path(dev['kobj'])
     70            gdb.write('    %-50s  %s\n' % (kobj_path, rtpm_status_str(dev)))
     71
     72    def invoke(self, arg, from_tty):
     73        gdb.write('domain                          status          children\n');
     74        gdb.write('    /device                                             runtime status\n');
     75        gdb.write('----------------------------------------------------------------------\n');
     76        for genpd in list_for_each_entry(
     77                gdb.parse_and_eval('&gpd_list'),
     78                generic_pm_domain_type.get_type().pointer(),
     79                'gpd_list_node'):
     80            self.summary_one(genpd)
     81
     82
     83LxGenPDSummary()