linux-kernel - Re: [PATCH 0/6] Intel Secure Guard Extensions

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Message-ID: <20160425175352.GA16786@kroah.com>
Date:	Mon, 25 Apr 2016 10:53:52 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:	Andy Lutomirski <luto@...nel.org>, Borislav Petkov <bp@...e.de>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	"open list:STAGING SUBSYSTEM" <devel@...verdev.osuosl.org>,
	Ingo Molnar <mingo@...nel.org>,
	Kristen Carlson Accardi <kristen@...ux.intel.com>,
	"open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>,
	Mathias Krause <minipli@...glemail.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Wan Zongshun <Vincent.Wan@....com>
Subject: Re: [PATCH 0/6] Intel Secure Guard Extensions

On Mon, Apr 25, 2016 at 08:34:07PM +0300, Jarkko Sakkinen wrote:
> Intel(R) SGX is a set of CPU instructions that can be used by
> applications to set aside private regions of code and data.  The code
> outside the enclave is disallowed to access the memory inside the
> enclave by the CPU access control.
> 
> The firmware uses PRMRR registers to reserve an area of physical memory
> called Enclave Page Cache (EPC). There is a hardware unit in the
> processor called Memory Encryption Engine. The MEE encrypts and decrypts
> the EPC pages as they enter and leave the processor package.
> 
> Jarkko Sakkinen (5):
>   x86, sgx:  common macros and definitions
>   intel_sgx: driver for Intel Secure Guard eXtensions
>   intel_sgx: ptrace() support for the driver
>   intel_sgx: driver documentation
>   intel_sgx: TODO file for the staging area
> 
> Kai Huang (1):
>   x86: add SGX definition to cpufeature
> 
>  Documentation/x86/intel_sgx.txt               |  86 +++
>  arch/x86/include/asm/cpufeature.h             |   1 +
>  arch/x86/include/asm/sgx.h                    | 253 +++++++

Why are you asking for this to go into staging?

What is keeping it out of the "real" part of the kernel tree?

And staging code is self-contained, putting files in arch/* isn't ok for
it, which kind of implies that you should get this merged correctly.

I need a lot more information here before I can take this code...

thanks,

greg k-h