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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 If you've installed GRUB for UEFI with optional dependencies following
BLFS, you should skip this page, and config GRUB with UEFI support BLFS, you should skip this page, and config GRUB with UEFI support
using the instructions provided in 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>
<para> <para>
If your system does not support UEFI or you don't want to use it, 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), <filename class="directory">/boot/efi</filename> (in the chroot),
mount it now:</para> 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> <note>
<para>The path to the device node is intentionally omitted in the <para>The path to the device node is intentionally omitted in the
@ -171,10 +174,16 @@
variable for the newly installed boot loader. Install variable for the newly installed boot loader. Install
<ulink url="&blfs-book;postlfs/efibootmgr.html">efibootmgr</ulink>, <ulink url="&blfs-book;postlfs/efibootmgr.html">efibootmgr</ulink>,
then run the following commands: then run the following commands:
<screen role="nodump"><userinput>mount -v -t efivarfs efivarfs /sys/firmware/efi/efivars <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 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> </para>
</note> </note>