From mboxrd@z Thu Jan 1 00:00:00 1970 From: khilman@baylibre.com (Kevin Hilman) Date: Fri, 20 Jan 2017 08:20:25 -0800 Subject: [PATCH 2/2] ARM64: dts: meson-gx: Add firmware reserved memory zones In-Reply-To: <20170120162025.31806-1-khilman@baylibre.com> References: <20170120162025.31806-1-khilman@baylibre.com> Message-ID: <20170120162025.31806-3-khilman@baylibre.com> To: linus-amlogic@lists.infradead.org List-Id: linus-amlogic.lists.infradead.org From: Neil Armstrong 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 F?rber [khilman: added Fixes tag, added _reserved and unit addresses] Signed-off-by: Kevin Hilman --- arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi index eada0b58ba1c..0cbe24b49710 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-gx.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 at 0 { + reg = <0x0 0x0 0x0 0x1000000>; + no-map; + }; + + /* 2 MiB reserved for ARM Trusted Firmware (BL31) */ + secmon_reserved: secmon at 10000000 { + reg = <0x0 0x10000000 0x0 0x200000>; + no-map; + }; + }; + cpus { #address-cells = <0x2>; #size-cells = <0x0>; -- 2.9.3