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efi/grub-setup: Another update attempt

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1. Move kernel section before emergency boot disk section.  The reason
   is in the emergency boot disk section we already need to mount the
   ESP, so we need VFAT and the related NLS configuration.
2. Add "codepage=437,iocharset=iso8859-1" mounting the ESP.  I'm not
   sure if grub-install will do things properly if a different NLS
   setting is used.  With some (broken IMO) kernel configuration a mount
   command without explicit codepage and iocharset setting won't work at
   all.  And I don't like the idea to force the users to set
   FAT_DEFAULT_CODEPAGE=437 or FAT_DEFAULT_IOCHARSET="iso8859-1" in
   kernel configuration.
3. Use "mount --mkdir" instead of a separate "mkdir -pv" command
   (again).
4. Wrap long commands at 80 characters.
5. The ESP entry in fstab is optional.  Personally I prefer it in fstab
   because I hate the Windoge behavior (hiding the ESP from the user).
6. Update kernel and LFS version in example grub.cfg file (again).
This commit is contained in:
Xi Ruoyao 2023-08-17 10:26:51 +08:00
parent e282f70ebe
commit 31ef72a90f
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GPG Key ID: ACAAD20E19E710E3
1 changed files with 59 additions and 58 deletions
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117
postlfs/filesystems/uefi-bootloaders/grub-setup.xml
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@ -23,6 +23,54 @@
</para>
</sect2>
<sect2 role="kernel" id="uefi-kernel">
<title>Kernel Configuration for UEFI support</title>
<para>
Enable the following options in the kernel configuration and recompile
the kernel if necessary:
</para>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
href="grub-setup-kernel.xml"/>
<variablelist>
<title>The meaning of the configuration options:</title>
<varlistentry>
<term><parameter>CONFIG_PARTITION_ADVANCED</parameter></term>
<listitem>
<para>If it's not enabled,
<parameter>CONFIG_EFI_PARTITION</parameter> will be enabled
automatically. But when it's enabled, you must set
<parameter>CONFIG_EFI_PARTITION</parameter> to enabled as
well.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<parameter>CONFIG_SYSFB_SIMPLEFB</parameter>,
<parameter>CONFIG_DRM</parameter>,
<parameter>CONFIG_DRM_FBDEV_EMULATION</parameter>,
<parameter>CONFIG_DRM_SIMPLEDRM</parameter>,
<parameter>CONFIG_FB</parameter>, and
<parameter>CONFIG_FRAMEBUFFER_CONSOLE</parameter></term>
<listitem>
<para>The combination of these options provides the Linux console
support on top of the UEFI framebuffer. To allow the kernel to
print debug messages at an early boot stage, they shouldn't be
built as kernel modules unless an initramfs will be used.</para>
</listitem>
</varlistentry>
</variablelist>
<indexterm zone="grub-setup uefi-kernel">
<primary sortas="d-uefi">UEFI</primary>
</indexterm>
</sect2>
<sect2>
<title>Create an Emergency Boot Disk</title>
@ -79,14 +127,15 @@ Syncing disks.</literal></screen>
and mount it:
</para>
<screen role="nodump"><userinput>mkdir -pv /mnt/rescue &amp;&amp;
mount -v -t vfat /dev/sdx1 /mnt/rescue</userinput></screen>
<screen role="nodump"><userinput>mount --mkdir -v -t vfat /dev/sdx1 -o codepage=437,iocharset=iso8859-1 \
/mnt/rescue</userinput></screen>
<para>
Install GRUB for EFI on the partition:
</para>
<screen role="nodump"><userinput>grub-install --target=x86_64-efi --removable --efi-directory=/mnt/rescue --boot-directory=/mnt/rescue</userinput></screen>
<screen role="nodump"><userinput>grub-install --target=x86_64-efi --removable \
--efi-directory=/mnt/rescue --boot-directory=/mnt/rescue</userinput></screen>
<para>
Unmount the partition:
@ -104,54 +153,6 @@ mount -v -t vfat /dev/sdx1 /mnt/rescue</userinput></screen>
</sect2>
<sect2 role="kernel" id="uefi-kernel">
<title>Kernel Configuration for UEFI support</title>
<para>
Enable the following options in the kernel configuration and recompile
the kernel if necessary:
</para>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
href="grub-setup-kernel.xml"/>
<variablelist>
<title>The meaning of the configuration options:</title>
<varlistentry>
<term><parameter>CONFIG_PARTITION_ADVANCED</parameter></term>
<listitem>
<para>If it's not enabled,
<parameter>CONFIG_EFI_PARTITION</parameter> will be enabled
automatically. But when it's enabled, you must set
<parameter>CONFIG_EFI_PARTITION</parameter> to enabled as
well.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<parameter>CONFIG_SYSFB_SIMPLEFB</parameter>,
<parameter>CONFIG_DRM</parameter>,
<parameter>CONFIG_DRM_FBDEV_EMULATION</parameter>,
<parameter>CONFIG_DRM_SIMPLEDRM</parameter>,
<parameter>CONFIG_FB</parameter>, and
<parameter>CONFIG_FRAMEBUFFER_CONSOLE</parameter></term>
<listitem>
<para>The combination of these options provides the Linux console
support on top of the UEFI framebuffer. To allow the kernel to
print debug messages at an early boot stage, they shouldn't be
built as kernel modules unless an initramfs will be used.</para>
</listitem>
</varlistentry>
</variablelist>
<indexterm zone="grub-setup uefi-kernel">
<primary sortas="d-uefi">UEFI</primary>
</indexterm>
</sect2>
<sect2>
<title>Find or Create the EFI System Partition</title>
@ -197,13 +198,13 @@ mount -v -t vfat /dev/sdx1 /mnt/rescue</userinput></screen>
the ESP):
</para>
<screen role="nodump"><userinput>mkdir -pv /boot/efi &amp;&amp;
mount -v -t vfat /dev/sda1 /boot/efi</userinput></screen>
<screen role="nodump"><userinput>mount --mkdir -v -t vfat /dev/sda1 -o codepage=437,iocharset=iso8859-1 \
/boot/efi</userinput></screen>
<para>
Add an entry for the ESP in
<filename>/etc/fstab</filename>, so it will be mounted automatically
during system boot:
If you want to mount the ESP automatically during system boot,
as the &root; user, add an entry for the ESP into
<filename>/etc/fstab</filename>:
</para>
<screen role="nodump"><userinput>cat &gt;&gt; /etc/fstab &lt;&lt; EOF</userinput>
@ -443,8 +444,8 @@ if loadfont /boot/grub/fonts/unicode.pf2; then
terminal_output gfxterm
fi
menuentry "GNU/Linux, Linux 6.1.11-lfs-11.3" {
linux /boot/vmlinuz-6.1.11-lfs-11.3 root=/dev/sda2 ro
menuentry "GNU/Linux, Linux 6.4.10-lfs-12.0" {
linux /boot/vmlinuz-6.4.10-lfs-12.0 root=/dev/sda2 ro
}
menuentry "Firmware Setup" {