linux-kernel - Re: [PATCH 3/6] intel_sgx: driver for Intel Secure Guard eXtensions

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Date:	Mon, 25 Apr 2016 22:04:42 +0300
From:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
	"open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
	<linux-kernel@...r.kernel.org>,
	"open list:STAGING SUBSYSTEM" <devel@...verdev.osuosl.org>
Subject: Re: [PATCH 3/6] intel_sgx: driver for Intel Secure Guard eXtensions

On Mon, Apr 25, 2016 at 10:55:36AM -0700, Greg KH wrote:
> On Mon, Apr 25, 2016 at 08:34:10PM +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.
> > 
> > Intel SGX driver provides a ioctl interface for loading and initializing
> > enclaves and a pager in order to support oversubscription.
> > 
> > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> > ---
> >  arch/x86/include/asm/sgx.h                    |   4 +-
> >  drivers/staging/Kconfig                       |   2 +
> >  drivers/staging/Makefile                      |   1 +
> >  drivers/staging/intel_sgx/Kconfig             |  13 +
> >  drivers/staging/intel_sgx/Makefile            |  12 +
> >  drivers/staging/intel_sgx/isgx.h              | 238 +++++++
> >  drivers/staging/intel_sgx/isgx_compat_ioctl.c | 179 +++++
> 
> No "new" kernel code should ever need compat_ioctl support, please just
> create your structures to not require this at all, it isn't that
> difficult.

I'll rework this. Thanks for the feedback.

> thanks,
> 
> greg k-h

/Jarkko