| <html devsite><head> |
| <title>其他资源</title> |
| <meta name="project_path" value="/_project.yaml"/> |
| <meta name="book_path" value="/_book.yaml"/> |
| </head> |
| <body> |
| <!-- |
| Copyright 2017 The Android Open Source Project |
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| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
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| http://www.apache.org/licenses/LICENSE-2.0 |
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| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| |
| <p>以下资源详细介绍了代码位置、工具、测试和许可信息。</p> |
| |
| <h2 id="query-api-code">可查询的代码位置</h2> |
| <p>可查询的供应商接口对象的代码位于 <code><a href="https://android.googlesource.com/platform/system/libvintf/+/master#" class="external">system/libvintf</a></code>(请参阅<a href="/devices/architecture/vintf/objects.html#queryable-api">可查询的 API</a>)。</p> |
| |
| <h2 id="related-tools">工具</h2> |
| <p>手写清单文件和兼容性矩阵可能很难。您可以使用以下工具来生成样板清单/兼容性矩阵,从其入手。</p> |
| |
| <h3 id="lshal">LSHAL</h3> |
| <p>LSHAL 是一种设备端工具,可以列出向 <code>hwservicemanager</code> 注册的所有 HAL 以及设备上所有可用的直通实现(例如 <code>android.hardware.foo@1.0-impl.so</code>)。它还可以根据该列表生成<strong>设备清单</strong>文件:</p> |
| |
| <pre class="devsite-terminal"> |
| adb shell su 0 /system/bin/lshal --init-vintf |
| </pre> |
| |
| <p>请注意以下几点:</p> |
| <ol> |
| <li>如果发现某个软件包既向 <code>hwservicemanager</code> 进行了注册,又发现其属于直通 HAL,则将 <code><transport></code> 设置为 <code>hwbinder</code>。</li> |
| <li>没有任何 SELinux 版本写入清单中。建议通过 <code>assemble_vintf</code> 注入该元素(如下所述)。</li> |
| <li>生成的 HAL 清单文件可能不准确。需要手动对比来更正设备清单与 <code>vendor.img</code> 实际提供的内容之间的不一致。</li> |
| </ol> |
| |
| <h3 id="assemble_vintf">ASSEMBLE_VINTF</h3> |
| <p><code>assemble_vintf</code> 是一种主机端工具,可以执行以下操作:</p> |
| <ol> |
| <li>验证兼容性矩阵或清单文件是否有效。</li> |
| <li>将变量注入到构建时可用的清单/兼容性矩阵,并生成应该安装到设备上的新文件。</li> |
| <li>检查生成的文件与其双重文件之间的兼容性。</li> |
| <li>如果给出了清单文件,则可以视需要生成与该清单文件兼容的样板兼容性矩阵。</li> |
| </ol> |
| |
| <h4><strong>示例:</strong>从框架清单文件生成<strong>设备兼容性矩阵</strong></h4> |
| |
| <pre class="devsite-terminal"> |
| assemble_vintf -m --hals-only \ |
| -i system/libhidl/manifest.xml \ |
| -o device/manufacturer/device_name/compatibility_matrix.xml |
| </pre> |
| <p>请注意,所有 HAL 都设置为 <code>optional="true"</code>。</p> |
| |
| <h4><strong>示例:</strong>从设备清单文件生成骨架框架兼容性矩阵</h4> |
| |
| <pre class="devsite-terminal"> |
| assemble_vintf -m --hals-only \ |
| -i device/foo/bar/manifest.xml \ |
| -o path/to/place/output/compatibility_matrix.xml |
| </pre> |
| <p>请注意,所有 HAL 都设置为 <code>optional="true"</code>。</p> |
| |
| <h4><strong>示例:</strong>从变量生成 XML 文件</h4> |
| |
| <p>编译时,如果在 <code>device/manufacturer/device_name/BoardConfig.mk</code> 中定义了以下变量:</p> |
| |
| <pre class="prettyprint"> |
| DEVICE_MANIFEST_FILE := \ |
| device/manufacturer/device_name/manifest.xml |
| DEVICE_MATRIX_FILE := \ |
| device/manufacturer/device_name/compatibility_matrix.xml |
| </pre> |
| |
| <p>然后,执行以下命令(已在编译系统中修改为省略实现详细信息),以生成所有 XML 文件:</p> |
| |
| <pre class="prettyprint"> |
| # device manifest; only when DEVICE_MANIFEST_FILE is set |
| BOARD_SEPOLICY_VERS=10000.0 assemble_vintf \ |
| $(addprefix,-i ,$(DEVICE_MANIFEST_FILE)) \ |
| -o $(TARGET_OUT_VENDOR)/etc/vintf/manifest.xml |
| |
| # device compatibility matrix; only when DEVICE_MATRIX_FILE is set |
| assemble_vintf \ |
| -i $(DEVICE_MATRIX_FILE) \ |
| -o $(TARGET_OUT_VENDOR)/etc/vintf/compatibility_matrix.xml |
| |
| # framework manifest |
| assemble_vintf |
| $(addprefix,-i ,system/libhidl/manifest.xml $(DEVICE_FRAMEWORK_MANIFEST_FILE)) \ |
| -o $(TARGET_OUT)/manifest.xml \ |
| -c $(TARGET_OUT_VENDOR)/etc/vintf/compatibility_matrix.xml |
| |
| # common framework compatibility matrix for each FCM version |
| BOARD_SEPOLICY_VERS=$(BOARD_SEPOLICY_VERS) \ |
| POLICYVERS=$(POLICYVERS) \ |
| BOARD_AVB_VBMETA_VERSION=$(BOARD_AVB_VBMETA_VERSION) |
| assemble_vintf \ |
| $(addprefix,-i ,\ |
| hardware/interfaces/compatibility_matrices/compatibility_matrix.empty.xml \ |
| $(DEVICE_FRAMEWORK_COMPATIBILITY_MATRIX_FILE)) \ |
| -o $(TARGET_OUT)/etc/vintf/compatibility_matrix.empty.xml |
| |
| # framework compatibility matrices at each FCM version |
| assemble_vintf |
| -i hardware/interfaces/compatibility_matrices/compatibility_matrix.{level}.xml \ |
| -o $(TARGET_OUT)/etc/vintf/compatibility_matrix.{level}.xml \ |
| --kernel=... |
| |
| # Final framework compatibility matrix to check with device manifest. |
| # Each input matrix should have a unique "level" attribute. |
| PRODUCT_ENFORCE_VINTF_MANIFEST=$(PRODUCT_ENFORCE_VINTF_MANIFEST) \ |
| assemble_vintf |
| -i $(TARGET_OUT)/etc/vintf/compatibility_matrix.*.xml |
| -o /tmp/compatibility_matrix.xml |
| -c $(TARGET_OUT_VENDOR)/manifest.xml |
| </pre> |
| |
| <h4 id="manifest-fragments"><strong>示例:</strong>从片段生成设备清单</h4> |
| |
| <p>多个设备清单片段可以在编译时捆绑。例如:</p> |
| |
| <pre class="prettyprint"> |
| <!-- device/manufacturer/device_name/manifest_common.xml --> |
| <manifest version="1.0" type="device"> |
| <!-- common HALs here --> |
| </manifest> |
| </pre> |
| |
| <pre class="prettyprint"> |
| <!-- device/manufacturer/device_name/ir.xml --> |
| <manifest version="1.0" type="device"> |
| <hal> |
| <name>android.hardware.ir</name> |
| <version>1.0</version> |
| <!-- other fields --> |
| </hal> |
| </manifest> |
| </pre> |
| |
| <pre class="prettyprint"> |
| # device/manufacturer/device_name/BoardConfig.mk |
| DEVICE_MANIFEST_FILE := device/manufacturer/device_name/manifest_common.xml |
| ifdef BOARD_ENABLE_IR |
| DEVICE_MANIFEST_FILE += device/manufacturer/device_name/ir.xml |
| endif |
| </pre> |
| |
| <p>然后,如果定义了 <code>BOARD_ENABLE_IR</code>,则 <code>assemble_vintf</code> 将 Ir HAL 添加到设备清单;如果未定义 <code>BOARD_ENABLE_IR</code>,则将其省略。执行以下命令(修改为省略实现详细信息)来生成设备清单:</p> |
| |
| <pre class="prettyprint"> |
| # if BOARD_ENABLE_IR is defined |
| BOARD_SEPOLICY_VERS=10000.0 assemble_vintf \ |
| -i device/manufacturer/device_name/manifest_common.xml:device/manufacturer/device_name/ir.xml \ |
| -o $(TARGET_OUT_VENDOR)/manifest.xml |
| |
| # if BOARD_ENABLE_IR is not defined |
| BOARD_SEPOLICY_VERS=10000.0 assemble_vintf \ |
| -i device/manufacturer/device_name/manifest_common.xml \ |
| -o $(TARGET_OUT_VENDOR)/manifest.xml |
| </pre> |
| |
| <p>有关详细信息,请参见:</p> |
| |
| <pre class="devsite-terminal">assemble_vintf --help</pre> |
| |
| <h2 id="testing">测试</h2> |
| <p><code>platform/system/libvintf</code> 项目使用 <a href="https://github.com/google/googletest" class="external">GTest</a> 进行序列化、反序列化和兼容性检查。</p> |
| |
| <h2 id="licensing">许可</h2> |
| <ul> |
| <li><code>tinyxml2</code> (external/tinyxml2) 用于将对象序列化到 XML 或从 XML 反序列化对象。类似于 BSD 的许可证。</li> |
| <li><code>libselinux</code> (external/selinux/libselinux) 用于获取 policydb 版本。公共网域许可证。</li> |
| <li><code>libz</code> (external/zlib) 用于解压缩 <code>/proc/config.gz</code>。类似于 BSD 的许可证。</li> |
| <li><code>libvintf</code> 项目使用 Apache 2.0 许可证(具有适当的 MODULE_LICENSE_APACHE2 和 NOTICE 文件)。</li> |
| </ul> |
| |
| </body></html> |