From a822283c7e56bb3b409712e0eb9af5a91aac247d Mon Sep 17 00:00:00 2001
From: Tomasz Maciej Nowak <tomek_n@o2.pl>
Date: Wed, 31 Oct 2018 18:48:37 +0100
Subject: [PATCH] x86: add amd microcode entries to grub config

Create initrd enries for x86 images, that'll load amd microcode as early
as possible. Also remove the preinit script responsible for late load of
microcode.

Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
---
 .../x86/base-files/lib/preinit/02_load_x86_ucode     | 12 ------------
 target/linux/x86/image/grub-iso.cfg                  |  9 +++++++--
 target/linux/x86/image/grub.cfg                      |  9 +++++++--
 3 files changed, 14 insertions(+), 16 deletions(-)
 delete mode 100644 target/linux/x86/base-files/lib/preinit/02_load_x86_ucode

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
deleted file mode 100644
index d3a23e24b2..0000000000
--- a/target/linux/x86/base-files/lib/preinit/02_load_x86_ucode
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/sh
-# Copyright (C) 2018 OpenWrt.org
-
-do_load_x86_ucode() {
-	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
-}
-
-boot_hook_add preinit_main do_load_x86_ucode
diff --git a/target/linux/x86/image/grub-iso.cfg b/target/linux/x86/image/grub-iso.cfg
index 5d128aa3aa..c624cbe0ee 100644
--- a/target/linux/x86/image/grub-iso.cfg
+++ b/target/linux/x86/image/grub-iso.cfg
@@ -7,7 +7,12 @@ set root='(cd)'
 
 menuentry "@TITLE@" {
 	linux /boot/vmlinuz @CMDLINE@ noinitrd
-	if [ -s /boot/intel-ucode.img ]; then
-		initrd /boot/intel-ucode.img
+	set amd="/boot/amd-ucode.img"
+	set intel="/boot/intel-ucode.img"
+	if [ -s "$amd" ]; then
+		initrd $amd $intel
+	fi
+	if [ -s "$intel" ]; then
+		initrd $intel $amd
 	fi
 }
diff --git a/target/linux/x86/image/grub.cfg b/target/linux/x86/image/grub.cfg
index a665686863..21d719261b 100644
--- a/target/linux/x86/image/grub.cfg
+++ b/target/linux/x86/image/grub.cfg
@@ -7,8 +7,13 @@ set root='(@ROOT@)'
 
 menuentry "@TITLE@" {
 	linux /boot/vmlinuz @CMDLINE@ noinitrd
-	if [ -s /boot/intel-ucode.img ]; then
-		initrd /boot/intel-ucode.img
+	set amd="/boot/amd-ucode.img"
+	set intel="/boot/intel-ucode.img"
+	if [ -s "$amd" ]; then
+		initrd $amd $intel
+	fi
+	if [ -s "$intel" ]; then
+		initrd $intel $amd
 	fi
 }
 menuentry "@TITLE@ (failsafe)" {