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From: Adam Ford <aford173@gmail.com>
To: linux-renesas-soc@vger.kernel.org
Cc: geert+renesas@glider.be, aford@beaconembedded.com,
	Adam Ford <aford173@gmail.com>
Subject: [PATCH] arm64: dts: renesas: beacon: Fix memory corruption from TF-A
Date: Fri, 24 Sep 2021 12:19:05 -0500	[thread overview]
Message-ID: <20210924171905.347115-1-aford173@gmail.com> (raw)

Trusted Firmware allocates a chunk of memory for a lossy compressor
which makes the memory unavailable to Linux and any attempts to read/write
from Linux result in memory corruption or a crash.  Fix this by reserving
the section of memory marked as unavailable by TF-A.

Fixes: a1d8a344f1ca ("arm64: dts: renesas: Introduce r8a774a1-beacon-rzg2m-kit")
Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/arch/arm64/boot/dts/renesas/beacon-renesom-som.dtsi b/arch/arm64/boot/dts/renesas/beacon-renesom-som.dtsi
index 090dc9c4f57b..e01cb30e03e8 100644
--- a/arch/arm64/boot/dts/renesas/beacon-renesom-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/beacon-renesom-som.dtsi
@@ -13,6 +13,17 @@ memory@48000000 {
 		reg = <0x0 0x48000000 0x0 0x78000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		lossy_decompress: lossy-decompress@54000000 {
+			reg = <0 0x54000000 0 0x03000000>; /* Reserved by TF-A */
+			no-map;
+		};
+	};
+
 	osc_32k: osc_32k {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
-- 
2.25.1


             reply	other threads:[~2021-09-24 17:21 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-24 17:19 Adam Ford [this message]
2021-10-05 14:30 ` [PATCH] arm64: dts: renesas: beacon: Fix memory corruption from TF-A Geert Uytterhoeven
2021-10-09 11:13   ` Adam Ford
2021-10-11  7:40     ` Geert Uytterhoeven

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