On 01/18/18 12:55, Matthew Miller wrote:
On Thu, Jan 18, 2018 at 11:45:42AM -0500, Pete Geenhuizen wrote:
Do we update the microcode now or do we wait until the latest
microcode_ctl rpm is available and then tackle this issue?
Check with your hardware vendor for BIOS/EFI firmware updates. Apply
those.
Thanks for the reply, but you missed what I was asking. I've
already downloaded the appropriate files from the links that Johnny
provided in a previous posting.
My question is, do we wait until the latest microcode_ctl rpm is
installed or do it now? My concern is that if I do it now the new
rpm might undo what I've done.
It does not matter. The microcode_ctl package contains CPU firmware
that is loaded at by the kernel early in the boot process if it's newer
than the one provided by the system firmware/BIOS. It is never
permanently stored in NVRAM or anything — it's loaded at each boot.
You should get a BIOS/EFI firmware update from your hardware vendor
which includes updated microcode. Then, you'll get the IBRS-capable
microcode at boot, every boot. This makes microcode_ctl moot.
Read more about this here: https://access.redhat.com/solutions/3315431
Thanks, Johnny, Matthew, Peter, ... everybody for your insights!
Valeri
++++++++++++++++++++++++++++++++++++++++
Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247
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