4.19-stable review patch. If anyone has any objections, please let me know.
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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 @@ -27,6 +27,23 @@ 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>;