Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1754125AbcJKRIu (ORCPT <rfc822;w@1wt.eu>);
        Tue, 11 Oct 2016 13:08:50 -0400
Received: from mx2.suse.de ([195.135.220.15]:35229 "EHLO mx2.suse.de"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1754094AbcJKRIs (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Tue, 11 Oct 2016 13:08:48 -0400
Date: Tue, 11 Oct 2016 19:03:56 +0200
From: Borislav Petkov <bp@suse.de>
To: Nilay Vaish <nilayvaish@gmail.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        "H. Peter Anvin" <h.peter.anvin@intel.com>,
        Ingo Molnar <mingo@elte.hu>, Tony Luck <tony.luck@intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Stephane Eranian <eranian@google.com>,
        Dave Hansen <dave.hansen@intel.com>, Shaohua Li <shli@fb.com>,
        David Carrillo-Cisneros <davidcc@google.com>,
        Ravi V Shankar <ravi.v.shankar@intel.com>,
        Sai Prakhya <sai.praneeth.prakhya@intel.com>,
        Vikas Shivappa <vikas.shivappa@linux.intel.com>,
        linux-kernel <linux-kernel@vger.kernel.org>, x86 <x86@kernel.org>
Subject: Re: [PATCH v3 04/18] x86/intel_rdt: Feature discovery
Message-ID: <20161011170356.qdv4czmyymzt6obm@pd.tnic>
References: <1475894763-64683-1-git-send-email-fenghua.yu@intel.com>
 <1475894763-64683-5-git-send-email-fenghua.yu@intel.com>
 <CACbG309kJa-6pAB_7K4GaJEPB7Tw0fQxd=_5+oWtZm1kCaAtHA@mail.gmail.com>
 <20161008205454.GB7672@linux.intel.com>
 <20161008195250.zaixshuwfas4y27c@pd.tnic>
 <CACbG30_1BwWx3kq+V5TS6Rr+_UC08aYVRJARhBdayn6KFhBcBA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <CACbG30_1BwWx3kq+V5TS6Rr+_UC08aYVRJARhBdayn6KFhBcBA@mail.gmail.com>
User-Agent: NeoMutt/ (1.7.0)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 782
Lines: 20

On Tue, Oct 11, 2016 at 11:57:52AM -0500, Nilay Vaish wrote:
> I think we should go with Fenghua' suggestion on this.  Reading the
> code around the edits from this patch, it seems word 7 is not owned by
> anyone.  Both AMD and Intel seem to be using it.

No, this is wrong. The 0x0 CPUID leaf is owned by Intel. Let me quote my
reply to Dave from yesterday:

There's no reason to do anything really: the 0x0... CPUID leaf is owned
by Intel and 0x8... by AMD. So far, if AMD implements a feature in the
Intel leaf, it sets the respective CPUID bit. So a feature can be
present in multiple vendors. Thus you don't need the vendor name in the
define."

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--