OvmfPkg/CpuHotplugSmm: complete root MMI handler for CPU hotplug

[mirror_edk2.git] / Readme.md

# EDK II Project\r
\r
A modern, feature-rich, cross-platform firmware development environment\r
for the UEFI and PI specifications from www.uefi.org.\r
\r
# Build Status\r
\r
<table>\r
  <tr>\r
    <th>Host Type</th>\r
    <th>Toolchain</th>\r
    <th>Branch</th>\r
    <th>Build Status</th>\r
    <th>Test Status</th>\r
    <th>Code Coverage</th>\r
  </tr>\r
  <tr>\r
    <td>Windows</td>\r
    <td>VS2019</td>\r
    <td>master</td>\r
    <td>\r
      <a  href="https://dev.azure.com/tianocore/edk2-ci/_build/latest?definitionId=32&branchName=master">\r
      <img src="https://dev.azure.com/tianocore/edk2-ci/_apis/build/status/Windows%20VS2019%20CI?branchName=master"/></a>\r
    </td>\r
    <td>\r
      <a  href="https://dev.azure.com/tianocore/edk2-ci/_build/latest?definitionId=32&branchName=master">\r
      <img src="https://img.shields.io/azure-devops/tests/tianocore/edk2-ci/32.svg"/></a>\r
    </td>\r
    <td>\r
      <a  href="https://dev.azure.com/tianocore/edk2-ci/_build/latest?definitionId=32&branchName=master">\r
      <img src="https://img.shields.io/badge/coverage-coming_soon-blue"/></a>\r
    </td>\r
  </tr>\r
  <tr>\r
    <td>Ubuntu</td>\r
    <td>GCC</td>\r
    <td>master</td>\r
    <td>\r
      <a  href="https://dev.azure.com/tianocore/edk2-ci/_build/latest?definitionId=31&branchName=master">\r
      <img src="https://dev.azure.com/tianocore/edk2-ci/_apis/build/status/Ubuntu%20GCC5%20CI?branchName=master"/></a>\r
    </td>\r
    <td>\r
      <a  href="https://dev.azure.com/tianocore/edk2-ci/_build/latest?definitionId=31&branchName=master">\r
      <img src="https://img.shields.io/azure-devops/tests/tianocore/edk2-ci/31.svg"/></a>\r
    </td>\r
    <td>\r
      <a  href="https://dev.azure.com/tianocore/edk2-ci/_build/latest?definitionId=31&branchName=master">\r
      <img src="https://img.shields.io/badge/coverage-coming_soon-blue"/></a>\r
    </td>\r
  </tr>\r
</table>\r
\r
[More CI Build information](.pytool/Readme.md)\r
\r
# License Details\r
\r
The majority of the content in the EDK II open source project uses a\r
[BSD-2-Clause Plus Patent License](License.txt).  The EDK II open source project\r
contains the following components that are covered by additional licenses:\r
* [BaseTools/Source/C/BrotliCompress](BaseTools/Source/C/BrotliCompress/LICENSE)\r
* [MdeModulePkg/Library/BrotliCustomDecompressLib](MdeModulePkg/Library/BrotliCustomDecompressLib/LICENSE)\r
* [BaseTools/Source/C/LzmaCompress](BaseTools/Source/C/LzmaCompress/LZMA-SDK-README.txt)\r
* [MdeModulePkg/Library/LzmaCustomDecompressLib](MdeModulePkg/Library/LzmaCustomDecompressLib/LZMA-SDK-README.txt)\r
* [IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/Sdk](IntelFrameworkModulePkg/Library/LzmaCustomDecompressLib/LZMA-SDK-README.txt)\r
* [BaseTools/Source/C/VfrCompile/Pccts](BaseTools/Source/C/VfrCompile/Pccts/RIGHTS)\r
* [MdeModulePkg/Universal/RegularExpressionDxe/Oniguruma](MdeModulePkg/Universal/RegularExpressionDxe/Oniguruma/README)\r
* [OvmfPkg](OvmfPkg/License.txt)\r
* [CryptoPkg/Library/OpensslLib/openssl](https://github.com/openssl/openssl/blob/50eaac9f3337667259de725451f201e784599687/LICENSE)\r
* [ArmPkg/Library/ArmSoftFloatLib/berkeley-softfloat-3](https://github.com/ucb-bar/berkeley-softfloat-3/blob/b64af41c3276f97f0e181920400ee056b9c88037/COPYING.txt)\r
\r
The EDK II Project is composed of packages.  The maintainers for each package\r
are listed in [Maintainers.txt](Maintainers.txt).\r
\r
# Resources\r
* [TianoCore](http://www.tianocore.org)\r
* [EDK II](https://github.com/tianocore/tianocore.github.io/wiki/EDK-II)\r
* [Getting Started with EDK II](https://github.com/tianocore/tianocore.github.io/wiki/Getting-Started-with-EDK-II)\r
* [Mailing Lists](https://github.com/tianocore/tianocore.github.io/wiki/Mailing-Lists)\r
* [TianoCore Bugzilla](https://bugzilla.tianocore.org)\r
* [How To Contribute](https://github.com/tianocore/tianocore.github.io/wiki/How-To-Contribute)\r
* [Release Planning](https://github.com/tianocore/tianocore.github.io/wiki/EDK-II-Release-Planning)\r
\r
# Code Contributions\r
To make a contribution to a TianoCore project, follow these steps.\r
1. Create a change description in the format specified below to\r
   use in the source control commit log.\r
2. Your commit message must include your `Signed-off-by` signature\r
3. Submit your code to the TianoCore project using the process\r
   that the project documents on its web page.  If the process is\r
   not documented, then submit the code on development email list\r
   for the project.\r
4. It is preferred that contributions are submitted using the same\r
   copyright license as the base project. When that is not possible,\r
   then contributions using the following licenses can be accepted:\r
   * BSD (2-clause): http://opensource.org/licenses/BSD-2-Clause\r
   * BSD (3-clause): http://opensource.org/licenses/BSD-3-Clause\r
   * MIT: http://opensource.org/licenses/MIT\r
   * Python-2.0: http://opensource.org/licenses/Python-2.0\r
   * Zlib: http://opensource.org/licenses/Zlib\r
\r
   For documentation:\r
   * FreeBSD Documentation License\r
     https://www.freebsd.org/copyright/freebsd-doc-license.html\r
\r
   Contributions of code put into the public domain can also be\r
   accepted.\r
\r
   Contributions using other licenses might be accepted, but further\r
   review will be required.\r
\r
# Developer Certificate of Origin\r
\r
Your change description should use the standard format for a\r
commit message, and must include your `Signed-off-by` signature.\r
\r
In order to keep track of who did what, all patches contributed must\r
include a statement that to the best of the contributor's knowledge\r
they have the right to contribute it under the specified license.\r
\r
The test for this is as specified in the [Developer's Certificate of\r
Origin (DCO) 1.1](https://developercertificate.org/). The contributor\r
certifies compliance by adding a line saying\r
\r
  Signed-off-by: Developer Name <developer@example.org>\r
\r
where `Developer Name` is the contributor's real name, and the email\r
address is one the developer is reachable through at the time of\r
contributing.\r
\r
```\r
Developer's Certificate of Origin 1.1\r
\r
By making a contribution to this project, I certify that:\r
\r
(a) The contribution was created in whole or in part by me and I\r
    have the right to submit it under the open source license\r
    indicated in the file; or\r
\r
(b) The contribution is based upon previous work that, to the best\r
    of my knowledge, is covered under an appropriate open source\r
    license and I have the right under that license to submit that\r
    work with modifications, whether created in whole or in part\r
    by me, under the same open source license (unless I am\r
    permitted to submit under a different license), as indicated\r
    in the file; or\r
\r
(c) The contribution was provided directly to me by some other\r
    person who certified (a), (b) or (c) and I have not modified\r
    it.\r
\r
(d) I understand and agree that this project and the contribution\r
    are public and that a record of the contribution (including all\r
    personal information I submit with it, including my sign-off) is\r
    maintained indefinitely and may be redistributed consistent with\r
    this project or the open source license(s) involved.\r
```\r
\r
# Sample Change Description / Commit Message\r
\r
```\r
From: Contributor Name <contributor@example.com>\r
Subject: [Repository/Branch PATCH] Pkg-Module: Brief-single-line-summary\r
\r
Full-commit-message\r
\r
Signed-off-by: Contributor Name <contributor@example.com>\r
```\r
\r
## Notes for sample patch email\r
\r
* The first line of commit message is taken from the email's subject\r
  line following `[Repository/Branch PATCH]`. The remaining portion of the\r
  commit message is the email's content.\r
* `git format-patch` is one way to create this format\r
\r
## Definitions for sample patch email\r
\r
* `Repository` is the identifier of the repository the patch applies.\r
  This identifier should only be provided for repositories other than\r
  `edk2`. For example `edk2-BuildSpecification` or `staging`.\r
* `Branch` is the identifier of the branch the patch applies. This\r
  identifier should only be provided for branches other than `edk2/master`.\r
  For example `edk2/UDK2015`, `edk2-BuildSpecification/release/1.27`, or\r
  `staging/edk2-test`.\r
* `Module` is a short identifier for the affected code or documentation. For\r
  example `MdePkg`, `MdeModulePkg/UsbBusDxe`, `Introduction`, or\r
  `EDK II INF File Format`.\r
* `Brief-single-line-summary` is a short summary of the change.\r
* The entire first line should be less than ~70 characters.\r
* `Full-commit-message` a verbose multiple line comment describing\r
  the change.  Each line should be less than ~70 characters.\r
* `Signed-off-by` is the contributor's signature identifying them\r
  by their real/legal name and their email address.\r
\r
# Submodules\r
\r
Submodule in EDK II is allowed but submodule chain should be avoided\r
as possible as we can. Currently EDK II contains the following submodules\r
\r
- CryptoPkg/Library/OpensslLib/openssl\r
- ArmPkg/Library/ArmSoftFloatLib/berkeley-softfloat-3\r
\r
ArmSoftFloatLib is actually required by OpensslLib. It's inevitable\r
in openssl-1.1.1 (since stable201905) for floating point parameter\r
conversion, but should be dropped once there's no such need in future\r
release of openssl.\r
\r
To get a full, buildable EDK II repository, use following steps of git\r
command\r
\r
```\r
$ git clone https://github.com/tianocore/edk2.git\r
$ cd edk2\r
$ git submodule update --init\r
$ cd ..\r
```\r
\r
If there's update for submodules, use following git commands to get the\r
latest submodules code.\r
\r
```\r
$ cd edk2\r
$ git pull\r
$ git submodule update\r
```\r
\r
Note: When cloning submodule repos, '--recursive' option is not\r
recommended. EDK II itself will not use any code/feature from\r
submodules in above submodules. So using '--recursive' adds a\r
dependency on being able to reach servers we do not actually want\r
any code from, as well as needlessly downloading code we will not\r
use.\r