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[Nick <nick@xxxxxxxxxxxx>]

Public bug reported:

dmesg | grep -i microcode
[    0.000000] CPU0 microcode updated early to revision 0xa0b, date = 2010-09-28
[    0.718229] microcode: CPU0 sig=0x1067a, pf=0x40, revision=0xa0b
[    0.718248] microcode: CPU1 sig=0x1067a, pf=0x40, revision=0xa07
[    0.718266] microcode: CPU2 sig=0x1067a, pf=0x40, revision=0xa07
[    0.718280] microcode: CPU3 sig=0x1067a, pf=0x40, revision=0xa07
[    0.718286] microcode: CPU4 sig=0x1067a, pf=0x40, revision=0xa07
[    0.718296] microcode: CPU5 sig=0x1067a, pf=0x40, revision=0xa07
[    0.718308] microcode: CPU6 sig=0x1067a, pf=0x40, revision=0xa07
[    0.718339] microcode: CPU7 sig=0x1067a, pf=0x40, revision=0xa07
[    0.718441] microcode: Microcode Update Driver: v2.00 <tigran@xxxxxxxxxxxxxxxxxxxx>, Peter Oruba

This is weird. All CPU cores showing same sig, but only one core's
microcode updated?

The machines have two physical CPUs, both are L5420, thus totally 8 CPU
cores.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1423296

Title:
  Only one CPU core gets microcode updated

Status in linux package in Ubuntu:
  New

Bug description:
  dmesg | grep -i microcode
  [    0.000000] CPU0 microcode updated early to revision 0xa0b, date = 2010-09-28
  [    0.718229] microcode: CPU0 sig=0x1067a, pf=0x40, revision=0xa0b
  [    0.718248] microcode: CPU1 sig=0x1067a, pf=0x40, revision=0xa07
  [    0.718266] microcode: CPU2 sig=0x1067a, pf=0x40, revision=0xa07
  [    0.718280] microcode: CPU3 sig=0x1067a, pf=0x40, revision=0xa07
  [    0.718286] microcode: CPU4 sig=0x1067a, pf=0x40, revision=0xa07
  [    0.718296] microcode: CPU5 sig=0x1067a, pf=0x40, revision=0xa07
  [    0.718308] microcode: CPU6 sig=0x1067a, pf=0x40, revision=0xa07
  [    0.718339] microcode: CPU7 sig=0x1067a, pf=0x40, revision=0xa07
  [    0.718441] microcode: Microcode Update Driver: v2.00 <tigran@xxxxxxxxxxxxxxxxxxxx>, Peter Oruba

  This is weird. All CPU cores showing same sig, but only one core's
  microcode updated?

  The machines have two physical CPUs, both are L5420, thus totally 8
  CPU cores.

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