linux-kernel - [PATCH v15 4/7] arm64: dts: imx8ulp-evk: add reserved memory property

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250407-imx-se-if-v15-4-e3382cecda01@nxp.com>
Date: Mon, 07 Apr 2025 21:50:20 +0530
From: Pankaj Gupta <pankaj.gupta@....com>
To: Jonathan Corbet <corbet@....net>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Pankaj Gupta <pankaj.gupta@....com>
Cc: linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v15 4/7] arm64: dts: imx8ulp-evk: add reserved memory
 property

Reserve 1MB of DDR memory region due to EdgeLock Enclave's hardware
limitation restricting access to DDR addresses from 0x80000000
to 0xafffffff.

Signed-off-by: Pankaj Gupta <pankaj.gupta@....com>
---
 arch/arm64/boot/dts/freescale/imx8ulp-evk.dts | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
index 290a49bea2f7..10aaf02f8ea7 100644
--- a/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8ulp-evk.dts
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 /*
- * Copyright 2021 NXP
+ * Copyright 2021, 2025 NXP
  */
 
 /dts-v1/;
@@ -37,6 +37,12 @@ linux,cma {
 			linux,cma-default;
 		};
 
+		ele_reserved: memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0 0x90000000 0 0x100000>;
+			no-map;
+		};
+
 		m33_reserved: noncacheable-section@...00000 {
 			reg = <0 0xa8600000 0 0x1000000>;
 			no-map;
@@ -259,6 +265,10 @@ &usdhc0 {
 	status = "okay";
 };
 
+&hsm0 {
+	memory-region = <&ele_reserved>;
+};
+
 &fec {
 	pinctrl-names = "default", "sleep";
 	pinctrl-0 = <&pinctrl_enet>;

-- 
2.43.0