Re: [PATCH v2 1/2] x86/AMD: Fix cpu_llc_id for AMD Fam17h systems

[Yazen Ghannam]

> > The current Fam17h cpu_llc_id  derivation has an underflow bug when
> 				^
> 			(Last Level Cache ID)
> 
> Let's write it out the first time.
> 

Ack.

> > 
> > The apicid decoding is fixed for bits 3 and above,
> 						    ^
> "is fixed ... in register... "
> 

Ack.

> > which give the core
> > complex, node and socket IDs. The LLC is at the core complex level so we
> > can find a unique cpu_llc_id by right shifting the apicid by 3.
> 
> "... because then the LSBit will be the Core Complex ID."
> 

Ack.

> > We can fix the underflow bug and simplify the code by replacing the
> > current cpu_llc_id derivation with a right shift.
> > 
> > Signed-off-by: Yazen Ghannam <Yazen.Ghannam@xxxxxxx>
> > Cc: <stable@xxxxxxxxxxxxxxx> # v4.4..
> > Fixes: 3849e91f571d ("x86/AMD: Fix last level cache topology for AMD Fam17h systems")
> > ---
> 
> I'll run it soon.
>

Thanks,
Yazen