tools/testing/cxl/test/cxl.c

File Facts

System

Linux kernel

Corpus path

tools/testing/cxl/test/cxl.c

Extension

.c

Size

52327 bytes

Lines

2058

Domain

Support Tooling And Documentation

Bucket

tools

Inferred role

Support Tooling And Documentation: exported/initcall integration point

Status

integration implementation candidate

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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/platform_device.h
• linux/memory_hotplug.h
• linux/genalloc.h
• linux/module.h
• linux/mutex.h
• linux/acpi.h
• linux/pci.h
• linux/mm.h
• cxlmem.h
• ../watermark.h
• mock.h

Detected Declarations

• struct cxl_mock_res
• struct cxl_cedt_context
• struct target_map_ctx
• struct cxl_test_decoder
• function is_multi_bridge
• function is_single_bridge
• function is_mock_dev
• function is_mock_adev
• function depopulate_all_mock_resources
• function cfmws_elc_update
• function populate_cedt
• function mock_acpi_table_parse_cedt
• function is_mock_bridge
• function is_mock_port
• function host_bridge_index
• function mock_acpi_evaluate_integer
• function mock_hmat_get_extended_linear_cache_size
• function is_mock_bus
• function map_targets
• function id
• function cxld_copy
• function cxld_registry_restore
• function __cxld_registry_save
• function cxld_registry_save
• function cxld_registry_update
• function mock_decoder_commit
• function mock_decoder_reset
• function init_disabled_mock_decoder
• function default_mock_decoder
• function first_decoder
• function configuration
• function mock_cxl_enumerate_decoders
• function __mock_cxl_decoders_setup
• function mock_cxl_switch_port_decoders_setup
• function mock_cxl_endpoint_decoders_setup
• function get_port_array
• function dpa_perf_setup
• function mock_cxl_endpoint_parse_cdat
• function mock_walk_hmem_resources
• function mock_region_intersects
• function mock_region_intersects_soft_reserve
• function mock_companion
• function cxl_mock_platform_device_add
• function cxl_rch_topo_init
• function cxl_rch_topo_exit
• function cxl_single_topo_init
• function cxl_single_topo_exit
• function cxl_mem_exit

Annotated Snippet

module_init(cxl_test_init);
module_exit(cxl_test_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("cxl_test: setup module");
MODULE_IMPORT_NS("ACPI");
MODULE_IMPORT_NS("CXL");

Annotation

• Immediate include surface: `linux/platform_device.h`, `linux/memory_hotplug.h`, `linux/genalloc.h`, `linux/module.h`, `linux/mutex.h`, `linux/acpi.h`, `linux/pci.h`, `linux/mm.h`.
• Detected declarations: `struct cxl_mock_res`, `struct cxl_cedt_context`, `struct target_map_ctx`, `struct cxl_test_decoder`, `function is_multi_bridge`, `function is_single_bridge`, `function is_mock_dev`, `function is_mock_adev`, `function depopulate_all_mock_resources`, `function cfmws_elc_update`.
• Atlas domain: Support Tooling And Documentation / tools.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.