Documentation/edac/features.rst
Source file repositories/reference/linux-study-clean/Documentation/edac/features.rst
File Facts
- System
- Linux kernel
- Corpus path
Documentation/edac/features.rst- Extension
.rst- Size
- 4654 bytes
- Lines
- 104
- Domain
- Support Tooling And Documentation
- Bucket
- Documentation
- Inferred role
- Support Tooling And Documentation: documentation
- 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.
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 OR GFDL-1.2-no-invariants-or-later
=================
EDAC/RAS features
=================
Copyright (c) 2024-2025 HiSilicon Limited.
:Author: Shiju Jose <shiju.jose@huawei.com>
:License: The GNU Free Documentation License, Version 1.2 without
Invariant Sections, Front-Cover Texts nor Back-Cover Texts.
(dual licensed under the GPL v2)
- Written for: 6.15
Introduction
------------
EDAC/RAS components plugging and high-level design:
1. Scrub control
2. Error Check Scrub (ECS) control
3. ACPI RAS2 features
4. Post Package Repair (PPR) control
5. Memory Sparing Repair control
High level design is illustrated in the following diagram::
+-----------------------------------------------+
| Userspace - Rasdaemon |
| +-------------+ |
| | RAS CXL mem | +---------------+ |
| |error handler|---->| | |
| +-------------+ | RAS dynamic | |
| +-------------+ | scrub, memory | |
| | RAS memory |---->| repair control| |
| |error handler| +----|----------+ |
| +-------------+ | |
+--------------------------|--------------------+
|
|
+-------------------------------|------------------------------+
| Kernel EDAC extension for | controlling RAS Features |
|+------------------------------|----------------------------+ |
|| EDAC Core Sysfs EDAC| Bus | |
|| +--------------------------|---------------------------+| |
|| |/sys/bus/edac/devices/<dev>/scrubX/ | | EDAC device || |
|| |/sys/bus/edac/devices/<dev>/ecsX/ |<->| EDAC MC || |
|| |/sys/bus/edac/devices/<dev>/repairX | | EDAC sysfs || |
|| +---------------------------|--------------------------+| |
|| EDAC|Bus | |
|| | | |
|| +----------+ Get feature | Get feature | |
|| | | desc +---------|------+ desc +----------+ | |
|| |EDAC scrub|<-----| EDAC device | | | | |
|| +----------+ | driver- RAS |----->| EDAC mem | | |
|| +----------+ | feature control| | repair | | |
|| | |<-----| | +----------+ | |
|| |EDAC ECS | +---------|------+ | |
|| +----------+ Register RAS|features | |
|| ______________________|_____________ | |
|+---------|---------------|------------------|--------------+ |
| +-------|----+ +-------|-------+ +----|----------+ |
| | | | CXL mem driver| | Client driver | |
| | ACPI RAS2 | | scrub, ECS, | | memory repair | |
| | driver | | sparing, PPR | | features | |Annotation
- Atlas domain: Support Tooling And Documentation / Documentation.
- 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.