Author: bdubbs
Date: Sun Mar 5 11:19:30 2017
New Revision: 18439
Log:
Update firmware discussion for Intel CPUs
Modified:
trunk/BOOK/introduction/welcome/changelog.xml
trunk/BOOK/postlfs/config/firmware.xml
Modified: trunk/BOOK/introduction/welcome/changelog.xml
==============================================================================
--- trunk/BOOK/introduction/welcome/changelog.xml Sun Mar 5 10:35:44
2017 (r18438)
+++ trunk/BOOK/introduction/welcome/changelog.xml Sun Mar 5 11:19:30
2017 (r18439)
@@ -46,6 +46,10 @@
<para>March 5th, 2017</para>
<itemizedlist>
<listitem>
+ <para>[bdubbs] - Update firmware discussion for Intel CPUs .
Partially fixes
+ <ulink url="&blfs-ticket-root;8929">#8929</ulink>.</para>
+ </listitem>
+ <listitem>
<para>[bdubbs] - Update to mpg123 1.24.0. Fixes
<ulink url="&blfs-ticket-root;8958">#8958</ulink>.</para>
</listitem>
Modified: trunk/BOOK/postlfs/config/firmware.xml
==============================================================================
--- trunk/BOOK/postlfs/config/firmware.xml Sun Mar 5 10:35:44 2017
(r18438)
+++ trunk/BOOK/postlfs/config/firmware.xml Sun Mar 5 11:19:30 2017
(r18439)
@@ -125,7 +125,7 @@
<sect3 id="intel-microcode">
<title>Intel Microcode for the CPU</title>
-
+<!--
<bridgehead renderas="sect4">Required Package</bridgehead>
<para role='required'>
<ulink url='http://fedorahosted.org/released/microcode_ctl/'/></para>
@@ -154,10 +154,52 @@
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>
+-->
+
+ <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
this case the required identification is 06-2a-07. A look at the blobs
@@ -167,7 +209,7 @@
by the identifier for your machine) to where the kernel can find
it:</para>
<screen><userinput>mkdir -pv /lib/firmware/intel-ucode
-cp -v <XX-YY-ZZ> /lib/firmware/intel-ucode</userinput></screen>
+cp -v intel-ucode/<XX-YY-ZZ>
/lib/firmware/intel-ucode</userinput></screen>
<para>Now that the Intel microcode has been prepared, use the following
options when you configure the kernel to try late loading of the Intel
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