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Subject: Re: [PATCH] x86/Kconfig: make X86_UMIP to cover any X86 CPU
To:     "H. Peter Anvin" <hpa@zytor.com>, Borislav Petkov <bp@alien8.de>
CC:     <tglx@linutronix.de>, <mingo@redhat.com>, <x86@kernel.org>,
        <linux-kernel@vger.kernel.org>, <DavidWang@zhaoxin.com>,
        <CooperYan@zhaoxin.com>, <QiyuanWang@zhaoxin.com>,
        <HerryYang@zhaoxin.com>, <CobeChen@zhaoxin.com>
References: <1583733990-2587-1-git-send-email-TonyWWang-oc@zhaoxin.com>
 <20200309203632.GB9002@zn.tnic>
 <79c4bc05-0482-3ce7-0f93-544977e466dc@zytor.com>
From:   Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
Message-ID: <621e255f-f497-a324-b004-4cb9b84784d0@zhaoxin.com>
Date:   Tue, 10 Mar 2020 15:24:37 +0800
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On 10/03/2020 08:25, H. Peter Anvin wrote:
> On 2020-03-09 13:36, Borislav Petkov wrote:
>>
>> If you're going to do that, is there even any use for that config option
>> at all?
>>
>> AFAICT, it adds ~1K to kernel text so we might just as well remove the
>> ifdeffery completely. The code ends up built in in 99% of the cases
>> anyway...
>>
> 
> Perhaps the super-tiny-embedded kernel guys care? Otherwise it seems
> pointless.

Agree, and I think leave this config to some users are meaningful.

Moreover, if remove the X86_UMIP config, a kernel-parameter like
"noumip" may be needed?

Sincerely
TonyWWang-oc

> 
> In general, once INTEL and AMD is enabled, it is just a matter of time
> until other (still existent) vendors add those features, at least for
> core features.
> 
> 	-hpa
> .
>