linux-kernel - [PATCH 1/1] arm64: dts: marvell: mcbin: reserve PSCI area

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Message-Id: <20181221110233.6074-1-xypron.glpk@gmx.de>
Date:   Fri, 21 Dec 2018 12:02:33 +0100
From:   Heinrich Schuchardt <xypron.glpk@....de>
To:     Russell King <linux@...linux.org.uk>
Cc:     Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Heinrich Schuchardt <xypron.glpk@....de>
Subject: [PATCH 1/1] arm64: dts: marvell: mcbin: reserve PSCI area

The memory area [0x4000000-0x4200000[ is occupied by the PSCI firmware. Any
attempt to access it from Linux leads to an immediate crash.

So let's make the same memory reservation as the vendor kernel.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>
---
 arch/arm64/boot/dts/marvell/armada-8040-mcbin.dts | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dts b/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dts
index 56fa44860909..18df1a321b52 100644
--- a/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dts
+++ b/arch/arm64/boot/dts/marvell/armada-8040-mcbin.dts
@@ -23,6 +23,17 @@
 		reg = <0x0 0x0 0x0 0x80000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		psci_reserved: psci-area@...0000 {
+		reg = <0x0 0x4000000 0x0 0x200000>;
+		no-map;
+		};
+	};
+
 	aliases {
 		ethernet0 = &cp0_eth0;
 		ethernet1 = &cp1_eth0;
-- 
2.19.2