Changeset 8e65a6a for chapter08

Timestamp:

01/08/2017 05:45:12 PM (7 years ago)

Author:

Bruce Dubbs <bdubbs@…>

Branches:

10.0, 10.0-rc1, 10.1, 10.1-rc1, 11.0, 11.0-rc1, 11.0-rc2, 11.0-rc3, 11.1, 11.1-rc1, 11.2, 11.2-rc1, 11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, 8.0, 8.1, 8.2, 8.3, 8.4, 9.0, 9.1, arm, bdubbs/gcc13, ml-11.0, multilib, renodr/libudev-from-systemd, s6-init, trunk, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/lfs-next, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/pip3, xry111/rust-wip-20221008, xry111/update-glibc

Children:

3e92f82

Parents:

6bc94ca

Message:

Expand discussion of UEFI in kernel and grub sections

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11165 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

Location:

chapter08

Files:

• grub.xml (modified) (1 diff)
• kernel.xml (modified) (1 diff)

chapter08/grub.xml

@@ -39 +39 @@
 xorriso -as cdrecord -v dev=/dev/cdrw blank=as_needed grub-img.iso</userinput></screen>
 
-    <note><para>Most newer systems now come with system firmware that is in
-    UEFI (Unified Extensible Firmware Interface) mode by default. To boot LFS
-    on these systems using the instructions here, the UEFI Mode and Secure Boot
-    capabilities need to be turned off. There are ways to boot with these
-    capabilities still enabled, but then are not covered here. For details, 
-    see <ulink
-    url="http://www.linuxfromscratch.org/hints/downloads/files/lfs-uefi.txt"> 
-    the lfs-uefi.txt hint</ulink> at
-    http://www.linuxfromscratch.org/hints/downloads/files/lfs-uefi.txt.</para></note>
+    <note>
+      <para>
+        To boot LFS on host systems that have UEFI enabled, the kernel needs to
+        have been built with the CONFIG_EFI_STUB capabality described in the
+        previous section.  However, LFS can be booted using GRUB2 without such
+        an addition. To do this, the UEFI Mode and Secure Boot capabilities in
+        the host system's BIOS need to be turned off.  For details, see <ulink
+        url="http://www.linuxfromscratch.org/hints/downloads/files/lfs-uefi.txt">
+        the lfs-uefi.txt hint</ulink> at
+        http://www.linuxfromscratch.org/hints/downloads/files/lfs-uefi.txt.
+      </para>
+    </note>
 
   </sect2>

chapter08/kernel.xml

@@ -122 +122 @@
     (&lfs-root;blfs/view/&short-version;/longindex.html#kernel-config-index).</para>
 
+    <note>
+      <para>If your host hardware is using UEFI, then the 'make defconfig'
+      above should automatically add in some EFI-related kernel options.</para>
+
+      <para>In order to allow your LFS kernel to be booted from within your
+      host's UEFI boot environment, your kernel must have this option
+      selected:</para>
+
+<screen role="nodump">Processor type and features  ---&gt;
+   [*]   EFI stub support  [CONFIG_EFI_STUB]</screen>
+
+      <para>A fuller description of managing UEFI environments from within LFS
+      is covered by the lfs-uefi.txt hint at
+      <ulink 
+        url="http://www.linuxfromscratch.org/hints/downloads/files/lfs-uefi.txt"/>.
+      </para>
+    </note>
+
     <variablelist>
       <title>The rationale for the above configuration items:</title>