scripts/gdb/linux/genpd.py
Source file repositories/reference/linux-study-clean/scripts/gdb/linux/genpd.py
File Facts
- System
- Linux kernel
- Corpus path
scripts/gdb/linux/genpd.py- Extension
.py- Size
- 2715 bytes
- Lines
- 86
- Domain
- Support Tooling And Documentation
- Bucket
- scripts
- Inferred role
- Support Tooling And Documentation: scripts
- Status
- atlas-only
Why This File Exists
Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) NXP 2019
import gdb
import sys
from linux.utils import CachedType, gdb_eval_or_none
from linux.lists import list_for_each_entry
generic_pm_domain_type = CachedType('struct generic_pm_domain')
pm_domain_data_type = CachedType('struct pm_domain_data')
device_link_type = CachedType('struct device_link')
def kobject_get_path(kobj):
path = kobj['name'].string()
parent = kobj['parent']
if parent:
path = kobject_get_path(parent) + '/' + path
return path
def rtpm_status_str(dev):
if dev['power']['runtime_error']:
return 'error'
if dev['power']['disable_depth']:
return 'unsupported'
_RPM_STATUS_LOOKUP = [
"active",
"resuming",
"suspended",
"suspending"
]
return _RPM_STATUS_LOOKUP[dev['power']['runtime_status']]
class LxGenPDSummary(gdb.Command):
'''Print genpd summary
Output is similar to /sys/kernel/debug/pm_genpd/pm_genpd_summary'''
def __init__(self):
super(LxGenPDSummary, self).__init__('lx-genpd-summary', gdb.COMMAND_DATA)
def summary_one(self, genpd):
if genpd['status'] == 0:
status_string = 'on'
else:
status_string = 'off-{}'.format(genpd['state_idx'])
child_names = []
for link in list_for_each_entry(
genpd['parent_links'],
device_link_type.get_type().pointer(),
'parent_node'):
child_names.append(link['child']['name'])
gdb.write('%-30s %-15s %s\n' % (
genpd['name'].string(),
status_string,
', '.join(child_names)))
# Print devices in domain
for pm_data in list_for_each_entry(genpd['dev_list'],
pm_domain_data_type.get_type().pointer(),
'list_node'):
dev = pm_data['dev']
kobj_path = kobject_get_path(dev['kobj'])
gdb.write(' %-50s %s\n' % (kobj_path, rtpm_status_str(dev)))
Annotation
- Atlas domain: Support Tooling And Documentation / scripts.
- Implementation status: atlas-only.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.