From c674f61876eb8fb583bdfcaa6895ebeca42b21ab Mon Sep 17 00:00:00 2001
From: tiyn <tiyn@mail-mk.eu>
Date: Mon, 9 Jan 2023 20:25:06 +0100
Subject: [PATCH] microcode: added arch microcode install

---
 wiki/linux/arch-linux/arch-linux.md           | 20 +++++++++++++++++--
 .../{pacman_and_yay.md => package_manager.md} |  0
 wiki/linux/flatpak.md                         |  2 +-
 wiki/linux/microcode.md                       | 15 ++++++++++++++
 4 files changed, 34 insertions(+), 3 deletions(-)
 rename wiki/linux/arch-linux/{pacman_and_yay.md => package_manager.md} (100%)
 create mode 100644 wiki/linux/microcode.md

diff --git a/wiki/linux/arch-linux/arch-linux.md b/wiki/linux/arch-linux/arch-linux.md
index 03d2441..a90ee32 100644
--- a/wiki/linux/arch-linux/arch-linux.md
+++ b/wiki/linux/arch-linux/arch-linux.md
@@ -2,10 +2,10 @@
 
 [Arch Linux](https://archlinux.org/) is a rolling-release, general-purpose Linux
 distribution.
-Arch Linux uses the [pacman](./pacman_and_yay.md) package manager.
+Arch Linux uses the [pacman](./package_manager.md) package manager.
 The Arch User Repositories (AUR) features community-made packages that can be
 installed with different
-[package manager that inlcude access to the AUR](/wiki/linux/arch-linux/pacman_and_yay.md).
+[package manager that inlcude access to the AUR](/wiki/linux/arch-linux/package_manager.md).
 
 ## Installation Medium
 
@@ -16,3 +16,19 @@ The ISO file can be found on the
 The iso can be written on an USB-stick using the command
 `dd bs=4M if=<path to ISO> of=/dev/sdx conv=fsync oflag=direct status=progress`.
 `<path to ISO>` points the command to the location of the ISO file
+
+## Enable Microcode Updates
+
+The microcode of Intel and AMD CPUs can be automatically updated by installing
+the `amd-ucode` or `intel-ucode` package depending on your CPU.
+The following description assumes the system is installed with
+[UEFI bootloader](/wiki/linux/arch-linux/installation.md#10-install-and-configure-uefi-bootloader)
+similar to the [recommended guide](/wiki/linux/arch-linux/installation.md).
+The microcode updates can then be enabled by adding the following line into
+`/boot/loader/entries/arch.conf`:
+
+```txt
+initrd  /<installed microcode package>.img
+```
+
+`<installed microcode package>` is either `amd-ucode` or `intel-ucode`.
diff --git a/wiki/linux/arch-linux/pacman_and_yay.md b/wiki/linux/arch-linux/package_manager.md
similarity index 100%
rename from wiki/linux/arch-linux/pacman_and_yay.md
rename to wiki/linux/arch-linux/package_manager.md
diff --git a/wiki/linux/flatpak.md b/wiki/linux/flatpak.md
index db421dd..0187b5f 100644
--- a/wiki/linux/flatpak.md
+++ b/wiki/linux/flatpak.md
@@ -6,7 +6,7 @@ linux systems.
 ## Setup
 
 The `flatpak` package can be installed by most distribution specific package
-managers (e.g. [pacman or yay](./arch-linux/pacman_and_yay.md)).
+managers (e.g. [pacman or yay](./arch-linux/package_manager.md)).
 After installation it is important to add [flathub](https://flathub.org/home),
 a source for many Flatpak packages.
 The addition of this can be done by running
diff --git a/wiki/linux/microcode.md b/wiki/linux/microcode.md
new file mode 100644
index 0000000..ff0b6a8
--- /dev/null
+++ b/wiki/linux/microcode.md
@@ -0,0 +1,15 @@
+# Microcode
+
+Processor vendors release stability and security updates to the processor
+microcode.
+
+## Installation
+
+Most Linux based operating systems feature packages depending on the processor
+manufacturer (on Arch Linux for example `intel-ucode` and `amd-ucode`).
+
+## Automatic Updates
+
+Automatic updates can be enabled depending on bootloader and operating system.
+For Arch Linux a description is given in the
+[Arch Linux entry](/wiki/linux/arch-linux/arch-linux.md#enable-microcode-updates).