Changeset ba78ebe2 for postlfs/config/firmware.xml

Timestamp:

03/05/2017 07:19:30 PM (7 years ago)

Author:

Bruce Dubbs <bdubbs@…>

Branches:

10.0, 10.1, 11.0, 11.1, 11.2, 11.3, 12.0, 12.1, 8.1, 8.2, 8.3, 8.4, 9.0, 9.1, basic, bdubbs/svn, elogind, kea, ken/TL2024, ken/inkscape-core-mods, ken/tuningfonts, lazarus, lxqt, perl-modules, plabs/newcss, plabs/python-mods, python3.11, qt5new, rahul/power-profiles-daemon, renodr/vulkan-addition, trunk, upgradedb, xry111/intltool, xry111/llvm18, xry111/soup3, xry111/test-20220226, xry111/xf86-video-removal

Children:

1ad29630

Parents:

dcff87e8

Message:

Update firmware discussion for Intel CPUs

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@18439 af4574ff-66df-0310-9fd7-8a98e5e911e0

File:

• postlfs/config/firmware.xml (modified) (3 diffs)

postlfs/config/firmware.xml

@@ -126 +126 @@
     <sect3 id="intel-microcode">
       <title>Intel Microcode for the CPU</title>
-
+<!--
       <bridgehead renderas="sect4">Required Package</bridgehead>
       <para role='required'>
@@ -155 +155 @@
       microcode for it. Determine the decimal values of the cpu family, model
       and stepping by running:</para>
+-->
+
+      <bridgehead renderas="sect4">Required File</bridgehead>
+      <para role='required'>
+         <ulink url='&sources-anduin-http;/intel-microcode/intel-microcode2ucode.c'/>
+      </para>
+
+      <para>For Intel CPUs an extra program, intel-microcode2ucode, is required. 
+      This is done a little differently since it is only a single source
+      code file.  The reason for this is that there are differnet versions
+      available, but most are specific to commercial distributions.</para>
+
+      <para>This program reformats the microcode supplied by Intel into a
+      format which the kernel can apply. The program
+      <userinput>intel-microcode2ucode</userinput> is used create the
+      individual firmware blobs </para>
+
+      <para>Create the program by downloading the source file and running:</para>
+
+<screen><userinput>gcc -g -Wall -O2 -o intel-microcode2ucode intel-microcode2ucode.c</userinput></screen>
+
+      <para>Now install the program as the <systemitem class="username">root</systemitem> user:</para>
+
+<screen><userinput>install intel-microcode2ucode /usr/bin</userinput></screen>
+
+     <para>The next step is to get the most recent version of the Intel
+     microcode.  The must be done by navigating to 
+     <ulink url='https://downloadcenter.intel.com/download/26400/Linux-Processor-Microcode-Data-File'/>
+     and following the instructions there.  As of this writing the most recent
+     version of the microcode is <filename>microcode-20161104.tgz</filename>.
+     This file is a tar file, but expands to <filename>microcode.dat</filename>
+     in the current directory.</para>
+
+     <para>Next, create various blobs with names in the form XX-YY-ZZ in a
+     subdirectory named <filename class="directory">intel-ucode/</filename>:
+     </para>
+
+<screen><userinput>intel-microcode2ucode microcode.dat</userinput></screen>
+
+     <para>Now you need to determine your processor's identity to see if there
+     is any microcode for it. Determine the decimal values of the cpu family,
+     model and stepping by running:</para>
 
 <screen><userinput>head -n7 /proc/cpuinfo</userinput></screen>
 
-      <para>Now convert the cpu family, model and stepping to pairs of hexadecimal
+      <para>Convert the cpu family, model and stepping to pairs of hexadecimal
       digits. For a SandyBridge i3-2120 (described as Intel(R) Core(TM) i3-2120
       CPU) the relevant values are cpu family 6, model 42, stepping 7 so in
@@ -168 +210 @@
 
 <screen><userinput>mkdir -pv /lib/firmware/intel-ucode
-cp -v &lt;XX-YY-ZZ&gt; /lib/firmware/intel-ucode</userinput></screen>
+cp -v intel-ucode/&lt;XX-YY-ZZ&gt; /lib/firmware/intel-ucode</userinput></screen>
 
       <para>Now that the Intel microcode has been prepared, use the following