linux-kernel - Re: [PATCH v14 10/19] x86/sgx: Detect Intel SGX

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Message-ID: <20180927131300.GC5436@linux.intel.com>
Date:   Thu, 27 Sep 2018 16:13:00 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     x86@...nel.org, platform-driver-x86@...r.kernel.org,
        dave.hansen@...el.com, sean.j.christopherson@...el.com,
        nhorman@...hat.com, npmccallum@...hat.com, serge.ayoun@...el.com,
        shay.katz-zamir@...el.com, linux-sgx@...r.kernel.org,
        andriy.shevchenko@...ux.intel.com,
        Suresh Siddha <suresh.b.siddha@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v14 10/19] x86/sgx: Detect Intel SGX

On Tue, Sep 25, 2018 at 01:02:14PM -0700, Randy Dunlap wrote:
> On 9/25/18 6:06 AM, Jarkko Sakkinen wrote:
> > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> > index 1a0be022f91d..b47e1a144409 100644
> > --- a/arch/x86/Kconfig
> > +++ b/arch/x86/Kconfig
> > @@ -1913,6 +1913,23 @@ config X86_INTEL_MEMORY_PROTECTION_KEYS
> >  
> >  	  If unsure, say y.
> >  
> > +config INTEL_SGX_CORE
> > +	bool "Intel SGX core functionality"
> > +	depends on X86_64 && CPU_SUP_INTEL
> > +	help
> > +	Intel Software Guard eXtensions (SGX) CPU feature that allows ring 3
> > +	applications to create enclaves: private regions of memory that are
> > +	architecturally protected from unauthorized access and/or modification.
> > +
> > +	This option enables kernel recognition of SGX, high-level management
> > +	of the Enclave Page Cache (EPC), tracking and writing of SGX Launch
> > +	Enclave Hash MSRs, and allows for virtualization of SGX via KVM. By
> > +	itself, this option does not provide SGX support to userspace.
> > +
> > +	For details, see Documentation/x86/intel_sgx.rst
> > +
> > +	If unsure, say N.
> > +
> 
> Hi,
> coding-style.rst says that help text should be indented with
> one tab + 2 spaces.
> 
> thanks.

Thank you.

/Jarkko