linux-kernel - Re: [PATCH] Ability to read the MKTME status from userspace

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Message-ID: <20200619161026.GF32683@zn.tnic>
Date:   Fri, 19 Jun 2020 18:10:26 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Richard Hughes <hughsient@...il.com>
Cc:     Daniel Gutson <daniel@...ypsium.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh@...nel.org>, Tony Luck <tony.luck@...el.com>,
        Rahul Tanwar <rahul.tanwar@...ux.intel.com>,
        Xiaoyao Li <xiaoyao.li@...el.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Ability to read the MKTME status from userspace

On Fri, Jun 19, 2020 at 02:50:39PM +0100, Richard Hughes wrote:
> No, it's not a boolean at all.

So before you do any kernel modules, you have to sit down and precisely
define what you want do to:

- do you want to initialize different stuff in your application based on
platform support?

- do you want to tell the user something so that the user can act
accordingly?

- do you just want to display feature support?

- ...

All this needs to be properly written down and discussed first, and then
we can think of the best way for the kernel to provide it, if there is
even any kind of info the kernel can provide reliably.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette