This is a note to let you know that I've just added the patch titled
arm64: dts: mediatek: mt8195-demo: fix the memory size of node secmon
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-dts-mediatek-mt8195-demo-fix-the-memory-size-of-node-secmon.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e4a4175201014c0222f6bab1895a17b3d1b92f08 Mon Sep 17 00:00:00 2001
From: Macpaul Lin <macpaul.lin@xxxxxxxxxxxx>
Date: Fri, 11 Nov 2022 17:55:40 +0800
Subject: arm64: dts: mediatek: mt8195-demo: fix the memory size of node secmon
From: Macpaul Lin <macpaul.lin@xxxxxxxxxxxx>
commit e4a4175201014c0222f6bab1895a17b3d1b92f08 upstream.
The size of device tree node secmon (bl31_secmon_reserved) was
incorrect. It should be increased to 2MiB (0x200000).
The origin setting will cause some abnormal behavior due to
trusted-firmware-a and related firmware didn't load correctly.
The incorrect behavior may vary because of different software stacks.
For example, it will cause build error in some Yocto project because
it will check if there was enough memory to load trusted-firmware-a
to the reserved memory.
When mt8195-demo.dts sent to the upstream, at that time the size of
BL31 was small. Because supported functions and modules in BL31 are
basic sets when the board was under early development stage.
Now BL31 includes more firmwares of coprocessors and maturer functions
so the size has grown bigger in real applications. According to the value
reported by customers, we think reserved 2MiB for BL31 might be enough
for maybe the following 2 or 3 years.
Cc: stable@xxxxxxxxxxxxxxx # v5.19
Fixes: 6147314aeedc ("arm64: dts: mediatek: Add device-tree for MT8195 Demo board")
Signed-off-by: Macpaul Lin <macpaul.lin@xxxxxxxxxxxx>
Reviewed-by: Miles Chen <miles.chen@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221111095540.28881-1-macpaul.lin@xxxxxxxxxxxx
Signed-off-by: Matthias Brugger <matthias.bgg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/mediatek/mt8195-demo.dts | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/arm64/boot/dts/mediatek/mt8195-demo.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-demo.dts
@@ -56,10 +56,10 @@
#size-cells = <2>;
ranges;
- /* 192 KiB reserved for ARM Trusted Firmware (BL31) */
+ /* 2 MiB reserved for ARM Trusted Firmware (BL31) */
bl31_secmon_reserved: secmon@54600000 {
no-map;
- reg = <0 0x54600000 0x0 0x30000>;
+ reg = <0 0x54600000 0x0 0x200000>;
};
/* 12 MiB reserved for OP-TEE (BL32)
Patches currently in stable-queue which might be from macpaul.lin@xxxxxxxxxxxx are
queue-6.1/arm64-dts-mediatek-mt8195-demo-fix-the-memory-size-of-node-secmon.patch
