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x86: add intel microcode entries to grub config
Create initrd enries for x86 images, that'll load intel microcode as early as possible. To achieve that the test module for grub is enabled which provides shell-like conditionals. Also restrict the late load of microcode to AMD processors. Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
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@ -2,9 +2,11 @@
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# Copyright (C) 2018 OpenWrt.org
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do_load_x86_ucode() {
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if grep -q AuthenticAMD /proc/cpuinfo; then
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if [ -e "/sys/devices/system/cpu/microcode/reload" ]; then
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echo 1 > /sys/devices/system/cpu/microcode/reload
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fi
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fi
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}
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boot_hook_add preinit_main do_load_x86_ucode
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@ -9,8 +9,8 @@ include $(INCLUDE_DIR)/image.mk
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export PATH=$(TARGET_PATH):/sbin
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GRUB2_MODULES = biosdisk boot chain configfile ext2 linux ls part_msdos reboot serial vga
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GRUB2_MODULES_ISO = biosdisk boot chain configfile iso9660 linux ls part_msdos reboot serial vga
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GRUB2_MODULES = biosdisk boot chain configfile ext2 linux ls part_msdos reboot serial test vga
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GRUB2_MODULES_ISO = biosdisk boot chain configfile iso9660 linux ls part_msdos reboot serial test vga
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GRUB_TERMINALS =
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GRUB_SERIAL_CONFIG =
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GRUB_TERMINAL_CONFIG =
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@ -7,4 +7,7 @@ set root='(cd)'
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menuentry "@TITLE@" {
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linux /boot/vmlinuz @CMDLINE@ noinitrd
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if [ -s /boot/intel-ucode.img ]; then
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initrd /boot/intel-ucode.img
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fi
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}
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@ -7,6 +7,9 @@ set root='(@ROOT@)'
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menuentry "@TITLE@" {
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linux /boot/vmlinuz @CMDLINE@ noinitrd
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if [ -s /boot/intel-ucode.img ]; then
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initrd /boot/intel-ucode.img
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fi
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}
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menuentry "@TITLE@ (failsafe)" {
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linux /boot/vmlinuz failsafe=true @CMDLINE@ noinitrd
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