[elrepo] kernel-lt and kernel-ml updates for Meltdown and Spectre

[Phil Perry]

On 10/01/18 20:21, Phil Perry wrote:
> On 10/01/18 19:55, Phil Perry wrote:
>> I'm starting this thread as somewhere to collect latest information on 
>> Meltdown and Spectre as relating to the elrepo kernel-lt and kernel-ml 
>> kernels.
>>
>> Please feel free to post to this thread, ask questions and share 
>> information. This is the place to do it.
>>
>> Please do not open bugs on https://elrepo.org/bugs unless you have 
>> identified a bug in the elrepo packaging process. They will be closed 
>> and you will be pointed here. Understand elrepo simply packages the 
>> upstream kernel source code as-is for your use on RHEL. They are not 
>> our bugs!
>>
>> Thank you,
>>
>> The ELRepo Team.
>>
> 
> Microcode updates from Intel:
> 
> https://downloadcenter.intel.com/download/27431/Linux-Processor-Microcode-Data-File 
> 
> 
> You can download the latest mircocode update directly from Intel (above, 
> check you are downloading the latest version) and apply it directly to 
> your machine.
> 
> Download and extract the above microcode tarball and extract.
> 
> Copy the files in the intel-ucode directory to 
> /usr/lib/firmware/intel-ucode/ to update the firmware files.
> 
> The following command may be used to reload the updated firmware without 
> rebooting:
> 
> echo 1 > /sys/devices/system/cpu/microcode/reload
> 
> Check in /var/log/messages to see if the microcode has been updated. For 
> example:
> 
> # cat /var/log/messages | grep 'microcode'
> Jan 10 20:17:00 quad kernel: microcode: CPU0 sig=0x506e3, pf=0x2, 
> revision=0xba
> Jan 10 20:17:00 quad kernel: microcode: CPU0 updated to revision 0xc2, 
> date = 2017-11-16
> Jan 10 20:17:00 quad kernel: microcode: CPU1 sig=0x506e3, pf=0x2, 
> revision=0xba
> Jan 10 20:17:00 quad kernel: microcode: CPU1 updated to revision 0xc2, 
> date = 2017-11-16
> Jan 10 20:17:00 quad kernel: microcode: CPU2 sig=0x506e3, pf=0x2, 
> revision=0xba
> Jan 10 20:17:00 quad kernel: microcode: CPU2 updated to revision 0xc2, 
> date = 2017-11-16
> Jan 10 20:17:00 quad kernel: microcode: CPU3 sig=0x506e3, pf=0x2, 
> revision=0xba
> Jan 10 20:17:00 quad kernel: microcode: CPU3 updated to revision 0xc2, 
> date = 2017-11-16
> 
> Note that updating of the microcode_ctl package may overwrite the 
> microcode firmware files so check a package update doesn't revert to 
> older firmware.
> 

Also check with your system / motherboard manufacturer for a BIOS 
update. Good luck with that one if you have older hardware!