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From:   Randy Dunlap <rdunlap@infradead.org>
Subject: [PATCH v14 10/19] x86/sgx: Detect Intel SGX
To:     Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>, x86@kernel.org,
        platform-driver-x86@vger.kernel.org
Cc:     dave.hansen@intel.com, sean.j.christopherson@intel.com,
        nhorman@redhat.com, npmccallum@redhat.com, serge.ayoun@intel.com,
        shay.katz-zamir@intel.com, linux-sgx@vger.kernel.org,
        andriy.shevchenko@linux.intel.com,
        Suresh Siddha <suresh.b.siddha@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Reinette Chatre <reinette.chatre@intel.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@vger.kernel.org>
References: <20180925130845.9962-1-jarkko.sakkinen@linux.intel.com>
 <20180925130845.9962-11-jarkko.sakkinen@linux.intel.com>
Message-ID: <7ea823ce-d6ee-1ff0-efb4-3ca93536fb7e@infradead.org>
Date:   Tue, 25 Sep 2018 13:02:14 -0700
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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.

-- 
~Randy