linux-kernel - RE: [PATCH v8: 1/4] x86/msr: Add MSR_MISC_FEATURE

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Date:   Fri, 4 Nov 2016 06:47:02 +0000
From:   "Andrejczuk, Grzegorz" <grzegorz.andrejczuk@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
CC:     "mingo@...hat.com" <mingo@...hat.com>,
        "hpa@...or.com" <hpa@...or.com>, "x86@...nel.org" <x86@...nel.org>,
        "bp@...e.de" <bp@...e.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "Daniluk, Lukasz" <lukasz.daniluk@...el.com>,
        "Cownie, James H" <james.h.cownie@...el.com>,
        "Pan, Jacob jun" <jacob.jun.pan@...el.com>,
        "Luc, Piotr" <Piotr.Luc@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v8: 1/4] x86/msr: Add MSR_MISC_FEATURE_ENABLES and
 PHIR3MWAIT bit

>>On Tue, 1 Nov 2016, Grzegorz Andrejczuk wrote:
>>  
>> +/* Intel Xeon Phi x200 ring 3 MONITOR/MWAIT */
>
>Oh well. I asked you to make that whole PHI thing go away. 
>
>This is a feature which has nothing to do with PHI. It just happens to be implemented on PHI. The FEATURES_ENABLES MSR is not at all PHI specific.
>
>It's all about a feature which enables ring 3 mwait/monitor.

This bit enables ring 3 MONITOR/MWAIT only on Xeon Phi. It is reserved for other architectures.
I think this will be confusing when I remove PHI.

>> +#define MSR_MISC_FEATURE_ENABLES	0x00000140
>> +#define MSR_MISC_FEATURE_ENABLES_PHIR3MWAIT_BIT	1
>> +#define MSR_MISC_FEATURE_ENABLES_PHIR3MWAIT	(1ULL << MSR_MISC_FEATURE_ENABLES_PHIR3MWAIT_BIT)
>> +
>
>You really try hard to get your crap behind me. Stop sending out half baken shit every other day without addressing my review comments.
>
>Your trust level approaches negative space. 
>
>Thanks,
>
>	tglx

Regards,
Grzegorz