From 2958eeea3b474ce932c432dfb2acd4b51aaa5cd7 Mon Sep 17 00:00:00 2001 From: Shiji Yang Date: Sun, 10 Aug 2025 20:15:12 +0800 Subject: [PATCH] mediatek: dts: increase mt7986 ATF reserved memory to 256 kiB The latest Mediatek open-source Trusted Firmware-A project has reserved 256 KiB for BL2 and BL31. Link: https://lore.kernel.org/all/OSBPR01MB16701BDF64C43EF07390C830BC29A@OSBPR01MB1670.jpnprd01.prod.outlook.com/ Signed-off-by: Shiji Yang Link: https://github.com/openwrt/openwrt/pull/19741 Signed-off-by: Hauke Mehrtens --- ...ek-mt7986-increase-ATF-reserved-memo.patch | 29 +++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 target/linux/mediatek/patches-6.12/199-arm64-dts-mediatek-mt7986-increase-ATF-reserved-memo.patch diff --git a/target/linux/mediatek/patches-6.12/199-arm64-dts-mediatek-mt7986-increase-ATF-reserved-memo.patch b/target/linux/mediatek/patches-6.12/199-arm64-dts-mediatek-mt7986-increase-ATF-reserved-memo.patch new file mode 100644 index 00000000000..8cef5ba4425 --- /dev/null +++ b/target/linux/mediatek/patches-6.12/199-arm64-dts-mediatek-mt7986-increase-ATF-reserved-memo.patch @@ -0,0 +1,29 @@ +From 236317dd4e55512933dcdaec3d0b4a0824f5e5bd Mon Sep 17 00:00:00 2001 +From: Shiji Yang +Date: Sun, 10 Aug 2025 18:11:01 +0800 +Subject: [PATCH] arm64: dts: mediatek: mt7986: increase ATF reserved memory to + 256 kiB + +The latest Mediatek open-source Trusted Firmware-A project has +reserved 256 KiB for BL2 and BL31. It is better to increase the +reserved memory region in the Linux kernel to protect the data. + +Signed-off-by: Shiji Yang +--- + arch/arm64/boot/dts/mediatek/mt7986a.dtsi | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +--- a/arch/arm64/boot/dts/mediatek/mt7986a.dtsi ++++ b/arch/arm64/boot/dts/mediatek/mt7986a.dtsi +@@ -76,9 +76,9 @@ + record-size = <0x1000>; + }; + +- /* 192 KiB reserved for ARM Trusted Firmware (BL31) */ ++ /* 256 KiB reserved for ARM Trusted Firmware (BL31 + BL32) */ + secmon_reserved: secmon@43000000 { +- reg = <0 0x43000000 0 0x30000>; ++ reg = <0 0x43000000 0 0x40000>; + no-map; + }; + -- 2.47.3