xnox@sochi:/tmp$ journalctl -k | grep microcode
Jun 19 08:45:05 sochi kernel: microcode: CPU0 microcode updated early to revision 0x1c, date = 2015-02-26
Jun 19 08:45:05 sochi kernel: microcode: CPU1 microcode updated early to revision 0x1c, date = 2015-02-26
Jun 19 08:45:05 sochi kernel: microcode: CPU2 microcode updated early to revision 0x1c, date = 2015-02-26
Jun 19 08:45:05 sochi kernel: microcode: CPU3 microcode updated early to revision 0x1c, date = 2015-02-26
Jun 19 08:45:05 sochi kernel: microcode: CPU0 sig=0x306a9, pf=0x2, revision=0x1c
Jun 19 08:45:05 sochi kernel: microcode: CPU1 sig=0x306a9, pf=0x2, revision=0x1c
Jun 19 08:45:05 sochi kernel: microcode: CPU2 sig=0x306a9, pf=0x2, revision=0x1c
Jun 19 08:45:05 sochi kernel: microcode: CPU3 sig=0x306a9, pf=0x2, revision=0x1c
Jun 19 08:45:05 sochi kernel: microcode: CPU4 sig=0x306a9, pf=0x2, revision=0x1c
Jun 19 08:45:05 sochi kernel: microcode: CPU5 sig=0x306a9, pf=0x2, revision=0x1c
Jun 19 08:45:05 sochi kernel: microcode: CPU6 sig=0x306a9, pf=0x2, revision=0x1c
Jun 19 08:45:05 sochi kernel: microcode: CPU7 sig=0x306a9, pf=0x2, revision=0x1c
Jun 19 08:45:05 sochi kernel: microcode: Microcode Update Driver: v2.01 <tigran@aivazian.fsnet.co.uk>, Peter Oruba