From: Neil Armstrong Date: Wed, 18 Jan 2017 16:50:45 +0000 (+0100) Subject: ARM64: dts: meson-gx: Add firmware reserved memory zones X-Git-Tag: archive/raspbian/4.9.82-1+deb9u3+rpi1_jessie~8^2~77 X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=859dea50436d1f4dfb0a8b5aaad1e6bfcfe34000;p=linux-4.9.git ARM64: dts: meson-gx: Add firmware reserved memory zones The Amlogic Meson GXBB/GXL/GXM secure monitor uses part of the memory space, this patch adds these reserved zones. Without such reserved memory zones, running the following stress command : $ stress-ng --vm 16 --vm-bytes 128M --timeout 10s multiple times: Could lead to the following kernel crashes : [ 46.937975] Bad mode in Error handler detected on CPU1, code 0xbf000000 -- SError ... [ 47.058536] Internal error: Attempting to execute userspace memory: 8600000f [#3] PREEMPT SMP ... Instead of the OOM killer. Fixes: 4f24eda8401f ("ARM64: dts: Prepare configs for Amlogic Meson GXBaby") Signed-off-by: Neil Armstrong Reviewed-by: Andreas Färber [khilman: added Fixes tag, added _reserved and unit addresses] Signed-off-by: Kevin Hilman Signed-off-by: Arnd Bergmann [bwh: Backported to 4.9: adjust filename] Gbp-Pq: Topic features/arm64 Gbp-Pq: Name dts-meson-gx-add-firmware-reserved-memory-zone.patch --- diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi index 610e0e1c3cee..2703eeaa97b5 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi @@ -55,6 +55,24 @@ #address-cells = <2>; #size-cells = <2>; + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + ranges; + + /* 16 MiB reserved for Hardware ROM Firmware */ + hwrom_reserved: hwrom@0 { + reg = <0x0 0x0 0x0 0x1000000>; + no-map; + }; + + /* 2 MiB reserved for ARM Trusted Firmware (BL31) */ + secmon_reserved: secmon@10000000 { + reg = <0x0 0x10000000 0x0 0x200000>; + no-map; + }; + }; + cpus { #address-cells = <0x2>; #size-cells = <0x0>;