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arm64: grub cfg: some improvements

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- Ensure /boot/efi is created before mounting ESP.
- Delete already existing "LFS" boot entry in efivar.
- Umount /sys/firmware/efi/efivars after running efibootmgr (or it
  causing troubles in "umount /sys").
- Mention "-e 3" which is needed for some UEFI implementation.
This commit is contained in:
Xi Ruoyao 2022-09-25 15:30:30 +08:00
parent ef6e958f10
commit c0a0f2536c
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1 changed files with 13 additions and 4 deletions
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17
chapter10/grub.xml
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@ -25,7 +25,9 @@
If you've installed GRUB for UEFI with optional dependencies following
BLFS, you should skip this page, and config GRUB with UEFI support
using the instructions provided in
<ulink url="&blfs-book;postlfs/grub-setup.html">the BLFS page</ulink>.
<ulink url="&blfs-book;postlfs/grub-setup.html">the BLFS page</ulink>,
but replace <parameter>--target=x86_64-efi</parameter> with
<parameter>--target=arm64-efi</parameter> for the ARM64 system.
</para>
<para>
If your system does not support UEFI or you don't want to use it,
@ -99,7 +101,8 @@
<filename class="directory">/boot/efi</filename> (in the chroot),
mount it now:</para>
<screen role="nodump"><userinput>mount /boot/efi</userinput></screen>
<screen role="nodump"><userinput>mkdir -pv /boot/efi
mount /boot/efi</userinput></screen>
<note>
<para>The path to the device node is intentionally omitted in the
@ -171,10 +174,16 @@
variable for the newly installed boot loader. Install
<ulink url="&blfs-book;postlfs/efibootmgr.html">efibootmgr</ulink>,
then run the following commands:
<screen role="nodump"><userinput>mount -v -t efivarfs efivarfs /sys/firmware/efi/efivars
efibootmgr -c -L LFS -l \EFI\BOOT\BOOTAA64.EFI -d /dev/sda</userinput></screen>
efibootmgr -B -L LFS || true
efibootmgr -c -L LFS -l \EFI\BOOT\BOOTAA64.EFI -d /dev/sda
umount /sys/firmware/efi/efivars</userinput></screen>
Replace <filename>/dev/sda</filename> with the device node of the
hard drive where you are installing GRUB into.
hard drive where you are installing GRUB into. For some UEFI
firmwares, <option>-e 3</option> option may be needed for the
<command>efibootmgr -c</command> command.
</para>
</note>