Linus Torvalds 5797d10ea4 Merge tag 'cxl-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl
Pull compute express link (CXL) updates from Dave Jiang:
 "The additions of note are adding CXL region remove support for locked
  CXL decoders, adding unit testing support for XOR address translation,
  and adding unit testing support for extended linear cache.

  Misc:
   - Remove incorrect page-allocator quirk section in documentation
   - Remove unused devm_cxl_port_enumerate_dports() function
   - Fix typo in cdat.c code comment
   - Replace use of system_wq with system_percpu_wq
   - Add locked CXL decoder support for region removal
   - Return when generic target updated
   - Rename region_res_match_cxl_range() to spa_maps_hpa()
   - Clarify comment in spa_maps_hpa()

  Enable unit testing for XOR address translation of SPA to DPA and vice versa:
   - Refactor address translation funcs for testing in cxl_region
   - Make the XOR calculations available for testing
   - Add cxl_translate module for address translation testing in
     cxl_test

  Extended Linear Cache changes:
   - Add extended linear cache size sysfs attribute
   - Adjust failure emission of extended linear cache detection in
     cxl_acpi
   - Added extended linear cache unit testing support in cxl_test

  Preparation refactor patches for PRM translation support:
   - Simplify cxl_rd_ops allocation and handling
   - Group xor arithmetric setup code in a single block
   - Remove local variable @inc in cxl_port_setup_targets()"

* tag 'cxl-for-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (22 commits)
  cxl/test: Assign overflow_err_count from log->nr_overflow
  cxl/test: Remove ret_limit race condition in mock_get_event()
  cxl/test: remove unused mock function for cxl_rcd_component_reg_phys()
  cxl/test: Add support for acpi extended linear cache
  cxl/test: Add cxl_test CFMWS support for extended linear cache
  cxl/test: Standardize CXL auto region size
  cxl/region: Remove local variable @inc in cxl_port_setup_targets()
  cxl/acpi: Group xor arithmetric setup code in a single block
  cxl: Simplify cxl_rd_ops allocation and handling
  cxl: Clarify comment in spa_maps_hpa()
  cxl: Rename region_res_match_cxl_range() to spa_maps_hpa()
  acpi/hmat: Return when generic target is updated
  cxl: Add handling of locked CXL decoder
  cxl/region: Add support to indicate region has extended linear cache
  cxl: Adjust extended linear cache failure emission in cxl_acpi
  cxl/test: Add cxl_translate module for address translation testing
  cxl/acpi: Make the XOR calculations available for testing
  cxl/region: Refactor address translation funcs for testing
  cxl/pci: replace use of system_wq with system_percpu_wq
  cxl: fix typos in cdat.c comments
  ...
2025-12-04 17:55:18 -08:00
2022-09-28 09:02:20 +02:00
2025-02-19 14:53:27 -07:00

Linux kernel
============

The Linux kernel is the core of any Linux operating system. It manages hardware,
system resources, and provides the fundamental services for all other software.

Quick Start
-----------

* Report a bug: See Documentation/admin-guide/reporting-issues.rst
* Get the latest kernel: https://kernel.org
* Build the kernel: See Documentation/admin-guide/quickly-build-trimmed-linux.rst
* Join the community: https://lore.kernel.org/

Essential Documentation
-----------------------

All users should be familiar with:

* Building requirements: Documentation/process/changes.rst
* Code of Conduct: Documentation/process/code-of-conduct.rst
* License: See COPYING

Documentation can be built with make htmldocs or viewed online at:
https://www.kernel.org/doc/html/latest/


Who Are You?
============

Find your role below:

* New Kernel Developer - Getting started with kernel development
* Academic Researcher - Studying kernel internals and architecture
* Security Expert - Hardening and vulnerability analysis
* Backport/Maintenance Engineer - Maintaining stable kernels
* System Administrator - Configuring and troubleshooting
* Maintainer - Leading subsystems and reviewing patches
* Hardware Vendor - Writing drivers for new hardware
* Distribution Maintainer - Packaging kernels for distros


For Specific Users
==================

New Kernel Developer
--------------------

Welcome! Start your kernel development journey here:

* Getting Started: Documentation/process/development-process.rst
* Your First Patch: Documentation/process/submitting-patches.rst
* Coding Style: Documentation/process/coding-style.rst
* Build System: Documentation/kbuild/index.rst
* Development Tools: Documentation/dev-tools/index.rst
* Kernel Hacking Guide: Documentation/kernel-hacking/hacking.rst
* Core APIs: Documentation/core-api/index.rst

Academic Researcher
-------------------

Explore the kernel's architecture and internals:

* Researcher Guidelines: Documentation/process/researcher-guidelines.rst
* Memory Management: Documentation/mm/index.rst
* Scheduler: Documentation/scheduler/index.rst
* Networking Stack: Documentation/networking/index.rst
* Filesystems: Documentation/filesystems/index.rst
* RCU (Read-Copy Update): Documentation/RCU/index.rst
* Locking Primitives: Documentation/locking/index.rst
* Power Management: Documentation/power/index.rst

Security Expert
---------------

Security documentation and hardening guides:

* Security Documentation: Documentation/security/index.rst
* LSM Development: Documentation/security/lsm-development.rst
* Self Protection: Documentation/security/self-protection.rst
* Reporting Vulnerabilities: Documentation/process/security-bugs.rst
* CVE Procedures: Documentation/process/cve.rst
* Embargoed Hardware Issues: Documentation/process/embargoed-hardware-issues.rst
* Security Features: Documentation/userspace-api/seccomp_filter.rst

Backport/Maintenance Engineer
-----------------------------

Maintain and stabilize kernel versions:

* Stable Kernel Rules: Documentation/process/stable-kernel-rules.rst
* Backporting Guide: Documentation/process/backporting.rst
* Applying Patches: Documentation/process/applying-patches.rst
* Subsystem Profile: Documentation/maintainer/maintainer-entry-profile.rst
* Git for Maintainers: Documentation/maintainer/configure-git.rst

System Administrator
--------------------

Configure, tune, and troubleshoot Linux systems:

* Admin Guide: Documentation/admin-guide/index.rst
* Kernel Parameters: Documentation/admin-guide/kernel-parameters.rst
* Sysctl Tuning: Documentation/admin-guide/sysctl/index.rst
* Tracing/Debugging: Documentation/trace/index.rst
* Performance Security: Documentation/admin-guide/perf-security.rst
* Hardware Monitoring: Documentation/hwmon/index.rst

Maintainer
----------

Lead kernel subsystems and manage contributions:

* Maintainer Handbook: Documentation/maintainer/index.rst
* Pull Requests: Documentation/maintainer/pull-requests.rst
* Managing Patches: Documentation/maintainer/modifying-patches.rst
* Rebasing and Merging: Documentation/maintainer/rebasing-and-merging.rst
* Development Process: Documentation/process/maintainer-handbooks.rst
* Maintainer Entry Profile: Documentation/maintainer/maintainer-entry-profile.rst
* Git Configuration: Documentation/maintainer/configure-git.rst

Hardware Vendor
---------------

Write drivers and support new hardware:

* Driver API Guide: Documentation/driver-api/index.rst
* Driver Model: Documentation/driver-api/driver-model/driver.rst
* Device Drivers: Documentation/driver-api/infrastructure.rst
* Bus Types: Documentation/driver-api/driver-model/bus.rst
* Device Tree Bindings: Documentation/devicetree/bindings/
* Power Management: Documentation/driver-api/pm/index.rst
* DMA API: Documentation/core-api/dma-api.rst

Distribution Maintainer
-----------------------

Package and distribute the kernel:

* Stable Kernel Rules: Documentation/process/stable-kernel-rules.rst
* ABI Documentation: Documentation/ABI/README
* Kernel Configuration: Documentation/kbuild/kconfig.rst
* Module Signing: Documentation/admin-guide/module-signing.rst
* Kernel Parameters: Documentation/admin-guide/kernel-parameters.rst
* Tainted Kernels: Documentation/admin-guide/tainted-kernels.rst



Communication and Support
=========================

* Mailing Lists: https://lore.kernel.org/
* IRC: #kernelnewbies on irc.oftc.net
* Bugzilla: https://bugzilla.kernel.org/
* MAINTAINERS file: Lists subsystem maintainers and mailing lists
* Email Clients: Documentation/process/email-clients.rst
Description
No description provided
Readme 3.5 GiB
Languages
C 97.1%
Assembly 1%
Shell 0.6%
Rust 0.4%
Python 0.4%
Other 0.3%