Re: [PATCH 1/2] fpga: mgr: Adds secure BitStream loading support

[Moritz Fischer <mdf@kernel.org>]

On Wed, Mar 03, 2021 at 10:11:51AM +0000, Nava kishore Manne wrote:
> Ping!
> 
> > -----Original Message-----
> > From: Nava kishore Manne
> > Sent: Wednesday, January 27, 2021 2:43 PM
> > To: Moritz Fischer <mdf@kernel.org>
> > Cc: trix@redhat.com; robh+dt@kernel.org; Michal Simek
> > <michals@xilinx.com>; linux-fpga@vger.kernel.org;
> > devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux-
> > kernel@vger.kernel.org; git <git@xilinx.com>; chinnikishore369@gmail.com
> > Subject: RE: [PATCH 1/2] fpga: mgr: Adds secure BitStream loading support
> > 
> > Hi Moritz,
> > 
> > 	Thanks for the review.
> > Please find my response inline.
> > 
> > > -----Original Message-----
> > > From: Moritz Fischer <mdf@kernel.org>
> > > Sent: Friday, January 22, 2021 10:47 AM
> > > To: Nava kishore Manne <navam@xilinx.com>
> > > Cc: mdf@kernel.org; trix@redhat.com; robh+dt@kernel.org; Michal Simek
> > > <michals@xilinx.com>; linux-fpga@vger.kernel.org;
> > > devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> > > linux- kernel@vger.kernel.org; git <git@xilinx.com>;
> > > chinnikishore369@gmail.com
> > > Subject: Re: [PATCH 1/2] fpga: mgr: Adds secure BitStream loading
> > > support
> > >
> > > On Mon, Jan 18, 2021 at 08:20:57AM +0530, Nava kishore Manne wrote:
> > > > This commit adds secure flags to the framework to support secure
> > > > BitStream Loading.
> > > >
> > > > Signed-off-by: Nava kishore Manne <nava.manne@xilinx.com>
> > > > ---
> > > >  drivers/fpga/of-fpga-region.c | 10 ++++++++++
> > > > include/linux/fpga/fpga-mgr.h | 12 ++++++++++++
> > > >  2 files changed, 22 insertions(+)
> > > >
> > > > diff --git a/drivers/fpga/of-fpga-region.c
> > > > b/drivers/fpga/of-fpga-region.c index e405309baadc..3a5eb4808888
> > > > 100644
> > > > --- a/drivers/fpga/of-fpga-region.c
> > > > +++ b/drivers/fpga/of-fpga-region.c
> > > > @@ -228,6 +228,16 @@ static struct fpga_image_info
> > > *of_fpga_region_parse_ov(
> > > >  	if (of_property_read_bool(overlay, "encrypted-fpga-config"))
> > > >  		info->flags |= FPGA_MGR_ENCRYPTED_BITSTREAM;
> > > >
> > > > +	if (of_property_read_bool(overlay, "userkey-encrypted-fpga-
> > > config"))
> > > > +		info->flags |=
> > > FPGA_MGR_USERKEY_ENCRYPTED_BITSTREAM;
> > >
> > > Can this just be encrypted-fpga-config/FPGA_MGR_ENCRYPTED?
> > 
> > In Encryption we have two kinds of use case one is Encrypted Bitstream
> > loading with Device-key and Other one is Encrypted Bitstream loading with
> > User-key. To differentiate both the use cases this Changes are needed.
> > 
> > Regards,
> > Navakishore.

Is this region specific, or could this be a sysfs attribute?

- Moritz