From 546fced2a23557e95dd34246744c3aa6cad92fe6 Mon Sep 17 00:00:00 2001 From: Tomasz Maciej Nowak Date: Tue, 20 Nov 2018 17:20:43 +0100 Subject: [PATCH] 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 --- target/linux/x86/base-files/lib/preinit/02_load_x86_ucode | 6 ++++-- target/linux/x86/image/Makefile | 4 ++-- target/linux/x86/image/grub-iso.cfg | 3 +++ target/linux/x86/image/grub.cfg | 3 +++ 4 files changed, 12 insertions(+), 4 deletions(-) diff --git a/target/linux/x86/base-files/lib/preinit/02_load_x86_ucode b/target/linux/x86/base-files/lib/preinit/02_load_x86_ucode index fb309c75c115..d3a23e24b231 100644 --- a/target/linux/x86/base-files/lib/preinit/02_load_x86_ucode +++ b/target/linux/x86/base-files/lib/preinit/02_load_x86_ucode @@ -2,8 +2,10 @@ # Copyright (C) 2018 OpenWrt.org do_load_x86_ucode() { - if [ -e "/sys/devices/system/cpu/microcode/reload" ]; then - echo 1 > /sys/devices/system/cpu/microcode/reload + if grep -q AuthenticAMD /proc/cpuinfo; then + if [ -e "/sys/devices/system/cpu/microcode/reload" ]; then + echo 1 > /sys/devices/system/cpu/microcode/reload + fi fi } diff --git a/target/linux/x86/image/Makefile b/target/linux/x86/image/Makefile index dbf8a8594b44..f8c3700d3215 100644 --- a/target/linux/x86/image/Makefile +++ b/target/linux/x86/image/Makefile @@ -9,8 +9,8 @@ include $(INCLUDE_DIR)/image.mk export PATH=$(TARGET_PATH):/sbin -GRUB2_MODULES = biosdisk boot chain configfile ext2 linux ls part_msdos reboot serial vga -GRUB2_MODULES_ISO = biosdisk boot chain configfile iso9660 linux ls part_msdos reboot serial vga +GRUB2_MODULES = biosdisk boot chain configfile ext2 linux ls part_msdos reboot serial test vga +GRUB2_MODULES_ISO = biosdisk boot chain configfile iso9660 linux ls part_msdos reboot serial test vga GRUB_TERMINALS = GRUB_SERIAL_CONFIG = GRUB_TERMINAL_CONFIG = diff --git a/target/linux/x86/image/grub-iso.cfg b/target/linux/x86/image/grub-iso.cfg index 9c59bdf6d49e..5d128aa3aab1 100644 --- a/target/linux/x86/image/grub-iso.cfg +++ b/target/linux/x86/image/grub-iso.cfg @@ -7,4 +7,7 @@ set root='(cd)' menuentry "@TITLE@" { linux /boot/vmlinuz @CMDLINE@ noinitrd + if [ -s /boot/intel-ucode.img ]; then + initrd /boot/intel-ucode.img + fi } diff --git a/target/linux/x86/image/grub.cfg b/target/linux/x86/image/grub.cfg index dedfa0a63675..a665686863e2 100644 --- a/target/linux/x86/image/grub.cfg +++ b/target/linux/x86/image/grub.cfg @@ -7,6 +7,9 @@ set root='(@ROOT@)' menuentry "@TITLE@" { linux /boot/vmlinuz @CMDLINE@ noinitrd + if [ -s /boot/intel-ucode.img ]; then + initrd /boot/intel-ucode.img + fi } menuentry "@TITLE@ (failsafe)" { linux /boot/vmlinuz failsafe=true @CMDLINE@ noinitrd -- 2.30.2