[coreboot] microcode updates
rminnich at gmail.com
Tue Jul 8 20:21:18 CEST 2014
no, that is not early enough on some CPUs.
On Tue, Jul 8, 2014 at 11:20 AM, yhlu <yinghailu at gmail.com> wrote:
> On Tue, Jul 8, 2014 at 10:39 AM, ron minnich <rminnich at gmail.com> wrote:
> > you can no longer update microcode after the kernel boots (on modern
> > CPUs). It has to happen before you do Cache As Ram in many cases, or
> > get some pretty unpleasant consequences.
> so even microcode_early will not help?
> config MICROCODE_EARLY
> bool "Early load microcode"
> depends on MICROCODE=y && BLK_DEV_INITRD
> select MICROCODE_INTEL_EARLY if MICROCODE_INTEL
> select MICROCODE_AMD_EARLY if MICROCODE_AMD
> default y
> This option provides functionality to read additional microcode
> at the beginning of initrd image. The data tells kernel to load
> microcode to CPU's as early as possible. No functional change if
> microcode data is glued to the initrd, therefore it's safe to
> say Y.
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