linux-kernel - Re: [RFC PATCH] x86/cpu/hygon: Fix phys_proc_id calculation logic for multi-die processor

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Message-ID: <20190322165214.GI7905@worktop.programming.kicks-ass.net>
Date:   Fri, 22 Mar 2019 17:52:14 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Pu Wen <puwen@...on.cn>, "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "hpa@...or.com" <hpa@...or.com>, "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] x86/cpu/hygon: Fix phys_proc_id calculation logic
 for multi-die processor

On Fri, Mar 22, 2019 at 05:44:45PM +0100, Borislav Petkov wrote:
> On Sat, Mar 23, 2019 at 12:19:01AM +0800, Pu Wen wrote:
> > That 6 is not a magic number.
> 
> Well, if I see a naked 6, then it is only magic to me. Now if it were a
> proper define with a descriptive name...

Does AMD/Hygon not have a CPUID leaf to read useful things like this
from?