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No essential content change. Signed-off-by: Changbin Du Reviewed-by: Mauro Carvalho Chehab --- Documentation/driver-api/acpi/index.rst | 1 + .../acpi/linuxized-acpica.rst} | 109 ++++++++++-------- 2 files changed, 64 insertions(+), 46 deletions(-) rename Documentation/{acpi/linuxized-acpica.txt => driver-api/acpi/linuxized-acpica.rst} (80%) diff --git a/Documentation/driver-api/acpi/index.rst b/Documentation/driver-api/acpi/index.rst index 898b0c60671a..12649947b19b 100644 --- a/Documentation/driver-api/acpi/index.rst +++ b/Documentation/driver-api/acpi/index.rst @@ -5,3 +5,4 @@ ACPI Support .. toctree:: :maxdepth: 2 + linuxized-acpica diff --git a/Documentation/acpi/linuxized-acpica.txt b/Documentation/driver-api/acpi/linuxized-acpica.rst similarity index 80% rename from Documentation/acpi/linuxized-acpica.txt rename to Documentation/driver-api/acpi/linuxized-acpica.rst index 3ad7b0dfb083..0ca8f1538519 100644 --- a/Documentation/acpi/linuxized-acpica.txt +++ b/Documentation/driver-api/acpi/linuxized-acpica.rst @@ -1,31 +1,37 @@ +.. SPDX-License-Identifier: GPL-2.0 +.. include:: + +============================================================ Linuxized ACPICA - Introduction to ACPICA Release Automation +============================================================ -Copyright (C) 2013-2016, Intel Corporation -Author: Lv Zheng +:Copyright: |copy| 2013-2016, Intel Corporation +:Author: Lv Zheng -Abstract: +Abstract +======== This document describes the ACPICA project and the relationship between ACPICA and Linux. It also describes how ACPICA code in drivers/acpi/acpica, include/acpi and tools/power/acpi is automatically updated to follow the upstream. +ACPICA Project +============== -1. ACPICA Project - - The ACPI Component Architecture (ACPICA) project provides an operating - system (OS)-independent reference implementation of the Advanced - Configuration and Power Interface Specification (ACPI). It has been - adapted by various host OSes. By directly integrating ACPICA, Linux can - also benefit from the application experiences of ACPICA from other host - OSes. +The ACPI Component Architecture (ACPICA) project provides an operating +system (OS)-independent reference implementation of the Advanced +Configuration and Power Interface Specification (ACPI). It has been +adapted by various host OSes. By directly integrating ACPICA, Linux can +also benefit from the application experiences of ACPICA from other host +OSes. - The homepage of ACPICA project is: www.acpica.org, it is maintained and - supported by Intel Corporation. +The homepage of ACPICA project is: www.acpica.org, it is maintained and +supported by Intel Corporation. - The following figure depicts the Linux ACPI subsystem where the ACPICA - adaptation is included: +The following figure depicts the Linux ACPI subsystem where the ACPICA +adaptation is included:: +---------------------------------------------------------+ | | @@ -71,21 +77,27 @@ upstream. Figure 1. Linux ACPI Software Components - NOTE: +.. note:: A. OS Service Layer - Provided by Linux to offer OS dependent implementation of the predefined ACPICA interfaces (acpi_os_*). + :: + include/acpi/acpiosxf.h drivers/acpi/osl.c include/acpi/platform include/asm/acenv.h B. ACPICA Functionality - Released from ACPICA code base to offer OS independent implementation of the ACPICA interfaces (acpi_*). + :: + drivers/acpi/acpica include/acpi/ac*.h tools/power/acpi C. Linux/ACPI Functionality - Providing Linux specific ACPI functionality to the other Linux kernel subsystems and user space programs. + :: + drivers/acpi include/linux/acpi.h include/linux/acpi*.h @@ -95,24 +107,27 @@ upstream. ACPI subsystem to offer architecture specific implementation of the ACPI interfaces. They are Linux specific components and are out of the scope of this document. + :: + include/asm/acpi.h include/asm/acpi*.h arch/*/acpi -2. ACPICA Release +ACPICA Release +============== - The ACPICA project maintains its code base at the following repository URL: - https://github.com/acpica/acpica.git. As a rule, a release is made every - month. +The ACPICA project maintains its code base at the following repository URL: +https://github.com/acpica/acpica.git. As a rule, a release is made every +month. - As the coding style adopted by the ACPICA project is not acceptable by - Linux, there is a release process to convert the ACPICA git commits into - Linux patches. The patches generated by this process are referred to as - "linuxized ACPICA patches". The release process is carried out on a local - copy the ACPICA git repository. Each commit in the monthly release is - converted into a linuxized ACPICA patch. Together, they form the monthly - ACPICA release patchset for the Linux ACPI community. This process is - illustrated in the following figure: +As the coding style adopted by the ACPICA project is not acceptable by +Linux, there is a release process to convert the ACPICA git commits into +Linux patches. The patches generated by this process are referred to as +"linuxized ACPICA patches". The release process is carried out on a local +copy the ACPICA git repository. Each commit in the monthly release is +converted into a linuxized ACPICA patch. Together, they form the monthly +ACPICA release patchset for the Linux ACPI community. This process is +illustrated in the following figure:: +-----------------------------+ | acpica / master (-) commits | @@ -153,7 +168,7 @@ upstream. Figure 2. ACPICA -> Linux Upstream Process - NOTE: +.. note:: A. Linuxize Utilities - Provided by the ACPICA repository, including a utility located in source/tools/acpisrc folder and a number of scripts located in generate/linux folder. @@ -170,19 +185,20 @@ upstream. following kernel configuration options: CONFIG_ACPI/CONFIG_ACPI_DEBUG/CONFIG_ACPI_DEBUGGER -3. ACPICA Divergences +ACPICA Divergences +================== - Ideally, all of the ACPICA commits should be converted into Linux patches - automatically without manual modifications, the "linux / master" tree should - contain the ACPICA code that exactly corresponds to the ACPICA code - contained in "new linuxized acpica" tree and it should be possible to run - the release process fully automatically. +Ideally, all of the ACPICA commits should be converted into Linux patches +automatically without manual modifications, the "linux / master" tree should +contain the ACPICA code that exactly corresponds to the ACPICA code +contained in "new linuxized acpica" tree and it should be possible to run +the release process fully automatically. - As a matter of fact, however, there are source code differences between - the ACPICA code in Linux and the upstream ACPICA code, referred to as - "ACPICA Divergences". +As a matter of fact, however, there are source code differences between +the ACPICA code in Linux and the upstream ACPICA code, referred to as +"ACPICA Divergences". - The various sources of ACPICA divergences include: +The various sources of ACPICA divergences include: 1. Legacy divergences - Before the current ACPICA release process was established, there already had been divergences between Linux and ACPICA. Over the past several years those divergences have been greatly @@ -213,11 +229,12 @@ upstream. rebased on the ACPICA side in order to offer better solutions, new ACPICA divergences are generated. -4. ACPICA Development +ACPICA Development +================== - This paragraph guides Linux developers to use the ACPICA upstream release - utilities to obtain Linux patches corresponding to upstream ACPICA commits - before they become available from the ACPICA release process. +This paragraph guides Linux developers to use the ACPICA upstream release +utilities to obtain Linux patches corresponding to upstream ACPICA commits +before they become available from the ACPICA release process. 1. Cherry-pick an ACPICA commit @@ -225,7 +242,7 @@ upstream. you want to cherry pick must be committed into the local repository. Then the gen-patch.sh command can help to cherry-pick an ACPICA commit - from the ACPICA local repository: + from the ACPICA local repository:: $ git clone https://github.com/acpica/acpica $ cd acpica @@ -240,7 +257,7 @@ upstream. changes that haven't been applied to Linux yet. You can generate the ACPICA release series yourself and rebase your code on - top of the generated ACPICA release patches: + top of the generated ACPICA release patches:: $ git clone https://github.com/acpica/acpica $ cd acpica @@ -254,7 +271,7 @@ upstream. 3. Inspect the current divergences If you have local copies of both Linux and upstream ACPICA, you can generate - a diff file indicating the state of the current divergences: + a diff file indicating the state of the current divergences:: # git clone https://github.com/acpica/acpica # git clone http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git -- 2.20.1