Merge tag 'docs-6.6' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "Documentation work keeps chugging along; this includes:

   - Work from Carlos Bilbao to integrate rustdoc output into the
     generated HTML documentation. This took some work to figure out how
     to do it without slowing the docs build and without creating people
     who don't have Rust installed, but Carlos got there

   - Move the loongarch and mips architecture documentation under
     Documentation/arch/

   - Some more maintainer documentation from Jakub

  ... plus the usual assortment of updates, translations, and fixes"

* tag 'docs-6.6' of git://git.lwn.net/linux: (56 commits)
  Docu: genericirq.rst: fix irq-example
  input: docs: pxrc: remove reference to phoenix-sim
  Documentation: serial-console: Fix literal block marker
  docs/mm: remove references to hmm_mirror ops and clean typos
  docs/zh_CN: correct regi_chg(),regi_add() to region_chg(),region_add()
  Documentation: Fix typos
  Documentation/ABI: Fix typos
  scripts: kernel-doc: fix macro handling in enums
  scripts: kernel-doc: parse DEFINE_DMA_UNMAP_[ADDR|LEN]
  Documentation: riscv: Update boot image header since EFI stub is supported
  Documentation: riscv: Add early boot document
  Documentation: arm: Add bootargs to the table of added DT parameters
  docs: kernel-parameters: Refer to the correct bitmap function
  doc: update params of memhp_default_state=
  docs: Add book to process/kernel-docs.rst
  docs: sparse: fix invalid link addresses
  docs: vfs: clean up after the iterate() removal
  docs: Add a section on surveys to the researcher guidelines
  docs: move mips under arch
  docs: move loongarch under arch
  ...

1 files changed, 157 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst b/Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst
new file mode 100644
index 000000000000..f1e9ab18206c
--- /dev/null
+++ b/Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst
@@ -0,0 +1,157 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: ../../disclaimer-zh_CN.rst
+
+:Original: Documentation/arch/loongarch/irq-chip-model.rst
+:Translator: Huacai Chen <chenhuacai@loongson.cn>
+
+==================================
+LoongArch的IRQ芯片模型（层级关系）
+==================================
+
+目前，基于LoongArch的处理器（如龙芯3A5000）只能与LS7A芯片组配合工作。LoongArch计算机
+中的中断控制器（即IRQ芯片）包括CPUINTC（CPU Core Interrupt Controller）、LIOINTC（
+Legacy I/O Interrupt Controller）、EIOINTC（Extended I/O Interrupt Controller）、
+HTVECINTC（Hyper-Transport Vector Interrupt Controller）、PCH-PIC（LS7A芯片组的主中
+断控制器）、PCH-LPC（LS7A芯片组的LPC中断控制器）和PCH-MSI（MSI中断控制器）。
+
+CPUINTC是一种CPU内部的每个核本地的中断控制器，LIOINTC/EIOINTC/HTVECINTC是CPU内部的
+全局中断控制器（每个芯片一个，所有核共享），而PCH-PIC/PCH-LPC/PCH-MSI是CPU外部的中
+断控制器（在配套芯片组里面）。这些中断控制器（或者说IRQ芯片）以一种层次树的组织形式
+级联在一起，一共有两种层级关系模型（传统IRQ模型和扩展IRQ模型）。
+
+传统IRQ模型
+===========
+
+在这种模型里面，IPI（Inter-Processor Interrupt）和CPU本地时钟中断直接发送到CPUINTC，
+CPU串口（UARTs）中断发送到LIOINTC，而其他所有设备的中断则分别发送到所连接的PCH-PIC/
+PCH-LPC/PCH-MSI，然后被HTVECINTC统一收集，再发送到LIOINTC，最后到达CPUINTC::
+
+     +-----+     +---------+     +-------+
+     | IPI | --> | CPUINTC | <-- | Timer |
+     +-----+     +---------+     +-------+
+                      ^
+                      |
+                 +---------+     +-------+
+                 | LIOINTC | <-- | UARTs |
+                 +---------+     +-------+
+                      ^
+                      |
+                +-----------+
+                | HTVECINTC |
+                +-----------+
+                 ^         ^
+                 |         |
+           +---------+ +---------+
+           | PCH-PIC | | PCH-MSI |
+           +---------+ +---------+
+             ^     ^           ^
+             |     |           |
+     +---------+ +---------+ +---------+
+     | PCH-LPC | | Devices | | Devices |
+     +---------+ +---------+ +---------+
+          ^
+          |
+     +---------+
+     | Devices |
+     +---------+
+
+扩展IRQ模型
+===========
+
+在这种模型里面，IPI（Inter-Processor Interrupt）和CPU本地时钟中断直接发送到CPUINTC，
+CPU串口（UARTs）中断发送到LIOINTC，而其他所有设备的中断则分别发送到所连接的PCH-PIC/
+PCH-LPC/PCH-MSI，然后被EIOINTC统一收集，再直接到达CPUINTC::
+
+          +-----+     +---------+     +-------+
+          | IPI | --> | CPUINTC | <-- | Timer |
+          +-----+     +---------+     +-------+
+                       ^       ^
+                       |       |
+                +---------+ +---------+     +-------+
+                | EIOINTC | | LIOINTC | <-- | UARTs |
+                +---------+ +---------+     +-------+
+                 ^       ^
+                 |       |
+          +---------+ +---------+
+          | PCH-PIC | | PCH-MSI |
+          +---------+ +---------+
+            ^     ^           ^
+            |     |           |
+    +---------+ +---------+ +---------+
+    | PCH-LPC | | Devices | | Devices |
+    +---------+ +---------+ +---------+
+         ^
+         |
+    +---------+
+    | Devices |
+    +---------+
+
+ACPI相关的定义
+==============
+
+CPUINTC::
+
+  ACPI_MADT_TYPE_CORE_PIC;
+  struct acpi_madt_core_pic;
+  enum acpi_madt_core_pic_version;
+
+LIOINTC::
+
+  ACPI_MADT_TYPE_LIO_PIC;
+  struct acpi_madt_lio_pic;
+  enum acpi_madt_lio_pic_version;
+
+EIOINTC::
+
+  ACPI_MADT_TYPE_EIO_PIC;
+  struct acpi_madt_eio_pic;
+  enum acpi_madt_eio_pic_version;
+
+HTVECINTC::
+
+  ACPI_MADT_TYPE_HT_PIC;
+  struct acpi_madt_ht_pic;
+  enum acpi_madt_ht_pic_version;
+
+PCH-PIC::
+
+  ACPI_MADT_TYPE_BIO_PIC;
+  struct acpi_madt_bio_pic;
+  enum acpi_madt_bio_pic_version;
+
+PCH-MSI::
+
+  ACPI_MADT_TYPE_MSI_PIC;
+  struct acpi_madt_msi_pic;
+  enum acpi_madt_msi_pic_version;
+
+PCH-LPC::
+
+  ACPI_MADT_TYPE_LPC_PIC;
+  struct acpi_madt_lpc_pic;
+  enum acpi_madt_lpc_pic_version;
+
+参考文献
+========
+
+龙芯3A5000的文档：
+
+  https://github.com/loongson/LoongArch-Documentation/releases/latest/download/Loongson-3A5000-usermanual-1.02-CN.pdf (中文版)
+
+  https://github.com/loongson/LoongArch-Documentation/releases/latest/download/Loongson-3A5000-usermanual-1.02-EN.pdf (英文版)
+
+龙芯LS7A芯片组的文档：
+
+  https://github.com/loongson/LoongArch-Documentation/releases/latest/download/Loongson-7A1000-usermanual-2.00-CN.pdf (中文版)
+
+  https://github.com/loongson/LoongArch-Documentation/releases/latest/download/Loongson-7A1000-usermanual-2.00-EN.pdf (英文版)
+
+.. note::
+    - CPUINTC：即《龙芯架构参考手册卷一》第7.4节所描述的CSR.ECFG/CSR.ESTAT寄存器及其
+      中断控制逻辑；
+    - LIOINTC：即《龙芯3A5000处理器使用手册》第11.1节所描述的“传统I/O中断”；
+    - EIOINTC：即《龙芯3A5000处理器使用手册》第11.2节所描述的“扩展I/O中断”；
+    - HTVECINTC：即《龙芯3A5000处理器使用手册》第14.3节所描述的“HyperTransport中断”；
+    - PCH-PIC/PCH-MSI：即《龙芯7A1000桥片用户手册》第5章所描述的“中断控制器”；
+    - PCH-LPC：即《龙芯7A1000桥片用户手册》第24.3节所描述的“LPC中断”。