4.14-stable review patch. If anyone has any objections, please let me know.
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From: Neil Armstrong narmstrong@baylibre.com
commit 4ee8e51b9edfe7845a094690a365c844e5a35b4b upstream.
This year, Amlogic updated the ARM Trusted Firmware reserved memory mapping for Meson GXL SoCs and products sold since May 2017 uses this alternate reserved memory mapping. But products had been sold using the previous mapping.
This issue has been explained in [1] and a dynamic solution is yet to be found to avoid loosing another 3Mbytes of reservable memory.
In the meantime, this patch adds this alternate memory zone only for the GXL and GXM SoCs since GXBB based new products stopped earlier.
[1] http://lists.infradead.org/pipermail/linux-amlogic/2017-October/004860.html
Fixes: bba8e3f42736 ("ARM64: dts: meson-gx: Add firmware reserved memory zones") Reported-by: Jerome Brunet jbrunet@baylibre.com Signed-off-by: Neil Armstrong narmstrong@baylibre.com Signed-off-by: Kevin Hilman khilman@baylibre.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/arm64/boot/dts/amlogic/meson-gxl.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+)
--- a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi @@ -49,6 +49,14 @@
/ { compatible = "amlogic,meson-gxl"; + + reserved-memory { + /* Alternate 3 MiB reserved for ARM Trusted Firmware (BL31) */ + secmon_reserved_alt: secmon@05000000 { + reg = <0x0 0x05000000 0x0 0x300000>; + no-map; + }; + }; };
ðmac {