linux-kernel - [PATCH 1/2] fpga: mgr: Adds secure BitStream loading support

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Message-ID: <20210118025058.10051-1-nava.manne@xilinx.com>
Date:   Mon, 18 Jan 2021 08:20:57 +0530
From:   Nava kishore Manne <nava.manne@...inx.com>
To:     <mdf@...nel.org>, <trix@...hat.com>, <robh+dt@...nel.org>,
        <michal.simek@...inx.com>, <linux-fpga@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <git@...inx.com>, <chinnikishore369@...il.com>,
        Nava kishore Manne <nava.manne@...inx.com>
Subject: [PATCH 1/2] fpga: mgr: Adds secure BitStream loading support

This commit adds secure flags to the framework to support
secure BitStream Loading.

Signed-off-by: Nava kishore Manne <nava.manne@...inx.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;
+
+	if (of_property_read_bool(overlay, "ddrmem-authenticated-fpga-config"))
+		info->flags |= FPGA_MGR_DDR_MEM_AUTH_BITSTREAM;
+
+	if (of_property_read_bool(overlay,
+				  "securemem-authenticated-fpga-config"))
+		info->flags |= FPGA_MGR_SECURE_MEM_AUTH_BITSTREAM;
+
 	if (!of_property_read_string(overlay, "firmware-name",
 				     &firmware_name)) {
 		info->firmware_name = devm_kstrdup(dev, firmware_name,
diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
index 2bc3030a69e5..2f7455a60666 100644
--- a/include/linux/fpga/fpga-mgr.h
+++ b/include/linux/fpga/fpga-mgr.h
@@ -67,12 +67,24 @@ enum fpga_mgr_states {
  * %FPGA_MGR_BITSTREAM_LSB_FIRST: SPI bitstream bit order is LSB first
  *
  * %FPGA_MGR_COMPRESSED_BITSTREAM: FPGA bitstream is compressed
+ *
+ * %FPGA_MGR_USERKEY_ENCRYPTED_BITSTREAM: indicates bitstream is encrypted with
+ *                                        user key
+ *
+ * %FPGA_MGR_DDR_MEM_AUTH_BITSTREAM: do bitstream authentication using DDR
+ *                                   memory if supported
+ *
+ * %FPGA_MGR_SECURE_MEM_AUTH_BITSTREAM: do bitstream authentication using secure
+ *                                      memory if supported
  */
 #define FPGA_MGR_PARTIAL_RECONFIG	BIT(0)
 #define FPGA_MGR_EXTERNAL_CONFIG	BIT(1)
 #define FPGA_MGR_ENCRYPTED_BITSTREAM	BIT(2)
 #define FPGA_MGR_BITSTREAM_LSB_FIRST	BIT(3)
 #define FPGA_MGR_COMPRESSED_BITSTREAM	BIT(4)
+#define FPGA_MGR_USERKEY_ENCRYPTED_BITSTREAM	BIT(5)
+#define FPGA_MGR_DDR_MEM_AUTH_BITSTREAM		BIT(6)
+#define FPGA_MGR_SECURE_MEM_AUTH_BITSTREAM	BIT(7)
 
 /**
  * struct fpga_image_info - information specific to a FPGA image
-- 
2.18.0