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Subject[PATCH 4.20 068/111] arm64: dts: marvell: armada-ap806: reserve PSCI area
Date
4.20-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Heinrich Schuchardt <xypron.glpk@gmx.de>

commit 132ac39cffbcfed80ada38ef0fc6d34d95da7be6 upstream.

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.

[gregory: added as comment that this region matches the mainline U-boot]
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/arm64/boot/dts/marvell/armada-ap806.dtsi | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

--- a/arch/arm64/boot/dts/marvell/armada-ap806.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-ap806.dtsi
@@ -28,6 +28,23 @@
method = "smc";
};

+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ /*
+ * This area matches the mapping done with a
+ * mainline U-Boot, and should be updated by the
+ * bootloader.
+ */
+
+ psci-area@4000000 {
+ reg = <0x0 0x4000000 0x0 0x200000>;
+ no-map;
+ };
+ };
+
ap806 {
#address-cells = <2>;
#size-cells = <2>;

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