linux-kernel - Re: [PATCH v17 03/23] x86/cpufeatures: Add SGX sub-features (as Linux-defined bits)

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Date:   Sun, 18 Nov 2018 10:36:33 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     x86@...nel.org, platform-driver-x86@...r.kernel.org,
        linux-sgx@...r.kernel.org, sean.j.christopherson@...el.com,
        nhorman@...hat.com, npmccallum@...hat.com, serge.ayoun@...el.com,
        shay.katz-zamir@...el.com, haitao.huang@...ux.intel.com,
        andriy.shevchenko@...ux.intel.com, tglx@...utronix.de,
        kai.svahn@...el.com, mark.shanahan@...el.com, luto@...capital.net,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Brijesh Singh <brijesh.singh@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v17 03/23] x86/cpufeatures: Add SGX sub-features (as
 Linux-defined bits)

On Fri, Nov 16, 2018 at 03:31:28PM -0800, Dave Hansen wrote:
> On 11/15/18 5:01 PM, Jarkko Sakkinen wrote:
> > +#define X86_FEATURE_SGX1		( 8*32+ 0) /* SGX1 leaf functions */
> > +#define X86_FEATURE_SGX2		( 8*32+ 1) /* SGX2 leaf functions */
> 
> Is there a reason these are not (all) tied to CONFIG_INTEL_SGX via:
> 
> arch/x86/include/asm/disabled-features.h
> 
> ?

No any particular reason.

/Jarkko