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

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Message-ID: <20210504102227.15475-3-nava.manne@xilinx.com>
Date:   Tue, 4 May 2021 15:52:25 +0530
From:   Nava kishore Manne <nava.manne@...inx.com>
To:     <mdf@...nel.org>, <trix@...hat.com>, <robh+dt@...nel.org>,
        <michal.simek@...inx.com>, <arnd@...db.de>,
        <rajan.vaja@...inx.com>, <gregkh@...uxfoundation.org>,
        <linus.walleij@...aro.org>, <amit.sunil.dhamne@...inx.com>,
        <tejas.patel@...inx.com>, <zou_wei@...wei.com>,
        <manish.narani@...inx.com>,
        <lakshmi.sai.krishna.potthuri@...inx.com>, <nava.manne@...inx.com>,
        <wendy.liang@...inx.com>, <linux-fpga@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <git@...inx.com>,
        <chinnikishore369@...il.com>
Subject: [RFC PATCH 2/4] fpga: Add new properties to support user-key encrypted bitstream loading

This patch Adds ‘encrypted-key-name’ and
‘encrypted-user-key-fpga-config’ properties
to support user-key encrypted bitstream loading
use case.

Signed-off-by: Nava kishore Manne <nava.manne@...inx.com>
---
 Documentation/devicetree/bindings/fpga/fpga-region.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/fpga/fpga-region.txt b/Documentation/devicetree/bindings/fpga/fpga-region.txt
index d787d57491a1..957dc6cbcd9e 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.
 - 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.
@@ -187,6 +190,8 @@ Optional properties:
 - external-fpga-config : boolean, set if the FPGA has already been configured
 	prior to OS boot up.
 - encrypted-fpga-config : boolean, set if the bitstream is encrypted
+- encrypted-user-key-fpga-config : boolean, set if the bitstream is encrypted
+	with user key.
 - region-unfreeze-timeout-us : The maximum time in microseconds to wait for
 	bridges to successfully become enabled after the region has been
 	programmed.
-- 
2.17.1