From: Yanteng Si <siyanteng01@gmail.com>
Date: Mon, 28 Mar 2022 09:59:50 +0000 (+0800)
Subject: docs/zh_CN: add vm page_table_check translation
X-Git-Tag: v6.1-rc5~1172^2~57
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=dc742b017439b18847745c1095e0ee997d586d85;p=platform%2Fkernel%2Flinux-starfive.git

docs/zh_CN: add vm page_table_check translation

Translate .../vm/page_table_check.rst into Chinese.

Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Alex Shi <alexs@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---

diff --git a/Documentation/translations/zh_CN/vm/index.rst b/Documentation/translations/zh_CN/vm/index.rst
index aa983d0..a2dea8b 100644
--- a/Documentation/translations/zh_CN/vm/index.rst
+++ b/Documentation/translations/zh_CN/vm/index.rst
@@ -34,6 +34,7 @@ TODO:待引用文档集被翻译完毕后请及时修改此处）
    overcommit-accounting
    page_frags
    page_owner
+   page_table_check
 
 TODOLIST:
 * arch_pgtable_helpers
@@ -42,7 +43,6 @@ TODOLIST:
 * hugetlbfs_reserv
 * numa
 * page_migration
-* page_table_check
 * remap_file_pages
 * slub
 * split_page_table_lock
diff --git a/Documentation/translations/zh_CN/vm/page_table_check.rst b/Documentation/translations/zh_CN/vm/page_table_check.rst
new file mode 100644
index 0000000..a29fc1b
--- /dev/null
+++ b/Documentation/translations/zh_CN/vm/page_table_check.rst
@@ -0,0 +1,56 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+:Original: Documentation/vm/page_table_check.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+:校译:
+
+
+========
+页表检查
+========
+
+概述
+====
+
+页表检查允许通过确保防止某些类型的内存损坏来强化内核。
+
+当新的页面可以从用户空间访问时，页表检查通过将它们的页表项（PTEs PMD等）添加到页表中来执行额外
+的验证。
+
+在检测到损坏的情况下，内核会被崩溃。页表检查有一个小的性能和内存开销。因此，它在默认情况下是禁用
+的，但是在额外的加固超过性能成本的系统上，可以选择启用。另外，由于页表检查是同步的，它可以帮助调
+试双映射内存损坏问题，在错误的映射发生时崩溃内核，而不是在内存损坏错误发生后内核崩溃。
+
+双重映射检测逻辑
+================
+
++-------------------+-------------------+-------------------+------------------+
+| Current Mapping   | New mapping       | Permissions       | Rule             |
++===================+===================+===================+==================+
+| Anonymous         | Anonymous         | Read              | Allow            |
++-------------------+-------------------+-------------------+------------------+
+| Anonymous         | Anonymous         | Read / Write      | Prohibit         |
++-------------------+-------------------+-------------------+------------------+
+| Anonymous         | Named             | Any               | Prohibit         |
++-------------------+-------------------+-------------------+------------------+
+| Named             | Anonymous         | Any               | Prohibit         |
++-------------------+-------------------+-------------------+------------------+
+| Named             | Named             | Any               | Allow            |
++-------------------+-------------------+-------------------+------------------+
+
+启用页表检查
+============
+
+用以下方法构建内核:
+
+- PAGE_TABLE_CHECK=y
+  注意，它只能在ARCH_SUPPORTS_PAGE_TABLE_CHECK可用的平台上启用。
+
+- 使用 "page_table_check=on" 内核参数启动。
+
+可以选择用PAGE_TABLE_CHECK_ENFORCED来构建内核，以便在没有额外的内核参数的情况下获得页表
+支持。