linux-kernel - [RFC v2 2/4] fpga: Add new property to support user-key encrypted bitstream loading

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Date:   Wed, 9 Jun 2021 11:22:30 +0530
From:   Nava kishore Manne <nava.manne@...inx.com>
To:     <robh+dt@...nel.org>, <michal.simek@...inx.com>, <mdf@...nel.org>,
        <trix@...hat.com>, <nava.manne@...inx.com>, <arnd@...db.de>,
        <rajan.vaja@...inx.com>, <gregkh@...uxfoundation.org>,
        <amit.sunil.dhamne@...inx.com>, <tejas.patel@...inx.com>,
        <zou_wei@...wei.com>, <lakshmi.sai.krishna.potthuri@...inx.com>,
        <ravi.patel@...inx.com>, <iwamatsu@...auri.org>,
        <wendy.liang@...inx.com>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-fpga@...r.kernel.org>,
        <git@...inx.com>, <chinnikishore369@...il.com>
Subject: [RFC v2 2/4] fpga: Add new property to support user-key encrypted bitstream loading

This patch Adds ‘encrypted-key-name’ property to
support user-key encrypted bitstream loading
use case.

Signed-off-by: Nava kishore Manne <nava.manne@...inx.com>
---
Changes for v2:
                -Both DT properties ie; encrypted-key-name and encrypted-user-key-fpga-config
                 are targeted to use for the same use cases but ideally encrypted-key-name
                 is enough to serve the purpose so updated the file to remove the unwanted
                 encrypted-user-key-fpga-config property as suggested by Rob.

 Documentation/devicetree/bindings/fpga/fpga-region.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/fpga/fpga-region.txt b/Documentation/devicetree/bindings/fpga/fpga-region.txt
index d787d57491a1..0de4a1c54650 100644
--- a/Documentation/devicetree/bindings/fpga/fpga-region.txt
+++ b/Documentation/devicetree/bindings/fpga/fpga-region.txt
@@ -177,6 +177,9 @@ Optional properties:
 	it indicates that the FPGA has already been programmed with this image.
 	If this property is in an overlay targeting a FPGA region, it is a
 	request to program the FPGA with that image.
+- encrypted-key-name : should contain the name of an encrypted key file located
+	on the firmware search path. It will be used to decrypt the FPGA image
+	file with user-key.
 - fpga-bridges : should contain a list of phandles to FPGA Bridges that must be
 	controlled during FPGA programming along with the parent FPGA bridge.
 	This property is optional if the FPGA Manager handles the bridges.
-- 
2.17.1