Re: [PATCH] x86/microcode: Add an option to reload microcode even if revision is unchanged

[Thomas Gleixner]

On Thu, 5 Sep 2019, Borislav Petkov wrote:
> On Wed, Sep 04, 2019 at 05:21:32PM -0700, Raj, Ashok wrote:
> > But echo 2 > reload would allow reading a microcode file from 
> > /lib/firmware/intel-ucode/ even if the revision hasn't changed right?
> > 
> > #echo 1 > reload wouldn't load if the revision on disk is same as what's loaded,
> > and we want to permit that with the echo 2 option.
> 
> Then before we continue with this, please specify what the exact
> requirements are. Talk to your microcoders or whoever is going to use
> this and give the exact use cases which should be supported and describe
> them in detail.

Plus I have to ask whether this facility makes any sense outside of
microcode development. If so, then please explain the use case and give
a proper justification why this needs to be in the mainline kernel.

Thanks,

	tglx