On 6/30/20 9:56 PM, Jonathan Billings wrote:
On Tue, Jun 30, 2020 at 09:25:01PM +0530, Sreyan Chakravarty wrote:
Would be great if I could be absolutely certain about this.
For now, saying that it works without verification, is just like wishful
thinking for me.
Take a look at /proc/cpuinfo
Your CPU code will be the:
'cpu family'-'model'-'stepping'
So, for example, on my computer, that is:
6 - 58 - 9
Now, Intel uses the hex for that, so lets get it easily:
$ printf '%02x-%02x-%02x\n' 6 58 9
06-3a-09
So, lets look at the github page for the intel microcode releases:
https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/releases
I don't see my CPU ID mentioned there, so the latest microcode doesn't
seem to have been updated for my CPU. Either the CPU isn't vulnerable
or they didn't address it.
But if I look at another computer:
$ printf '%02x-%02x-%02x\n' 6 94 3
06-5e-03
I do see it. And the microcode_ctl update does appear to be applying
an update. Actually, that one is a RHEL system and in its notes, it
says that it doesn't apply the microcode update because it causes
hangs.
Hopefully this will help you research your own system.
Thank you. Just one question what happens if I find out that my CPU is
affected but they did not address it ?
Should I open a report on BZ ?
--
Regards,
Sreyan
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