[LEDE-DEV] [PATCH v2 5/6] x86: add intel microcode entries to grub config

[Tomasz Maciej Nowak]

W dniu 18.04.2018 o 00:51, Philip Prindeville pisze:
> Is there a downside to forcing AMD to also do early firmware updates?

AFAIK there shouldn't be any for either methods regarding AMD. I made 
also a prototype for AMD, but as there are no downsides for current 
method and I don't have any hardware to test it, it's being left out.

> 
> 
> 
>> On Apr 17, 2018, at 12:50 PM, Tomasz Maciej Nowak <tomek_n at o2.pl> wrote:
>>
>> Create initrd enries for x86 images, that'll load intel microcode as
>> early as possible. Also restrict the late load of microcode to AMD
>> processors.
>>
>> Signed-off-by: Tomasz Maciej Nowak <tomek_n at o2.pl>
>> ---
>> 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 fb309c75c1..d3a23e24b2 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 cf1e1a9edf..523c07eb75 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 3d47a95a4b..30b587bd1c 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 "OpenWrt" {
>> 	linux /boot/vmlinuz @CMDLINE@ noinitrd
>> +	if [ -e /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 9ec6b2d39c..dde24b95ce 100644
>> --- a/target/linux/x86/image/grub.cfg
>> +++ b/target/linux/x86/image/grub.cfg
>> @@ -7,6 +7,9 @@ set root='(@ROOT@)'
>>
>> menuentry "OpenWrt" {
>> 	linux /boot/vmlinuz @CMDLINE@ noinitrd
>> +	if [ -e /boot/intel-ucode.img ]; then
>> +		initrd /boot/intel-ucode.img
>> +	fi
>> }
>> menuentry "OpenWrt (failsafe)" {
>> 	linux /boot/vmlinuz failsafe=true @CMDLINE@ noinitrd
>> -- 
>> 2.17.0
>>
> 
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-- 
TMN