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Date: Tue, 12 May 2020 16:48:02 +0200
From: Mian Yousaf Kaukab <ykaukab@...e.de>
To: swarren@...dotorg.org, robh+dt@...nel.org, robin.murphy@....com
Cc: devicetree@...r.kernel.org, talho@...dia.com,
thierry.reding@...il.com, jonathanh@...dia.com,
linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, afaerber@...e.de,
arnd@...db.de, gregkh@...uxfoundation.org,
Mian Yousaf Kaukab <ykaukab@...e.de>
Subject: [PATCH 3/4] arm64: tegra186: add reserved-only flag in sysram node
bpmp driver has reserved regions in sysram. Since sysram is only used
by the bpmp driver, add ‘reserved-only’ flag to the sysram node so
that only regions used by the bpmp driver are remapped. Other regions
of the sysram may not be accessible to the kernel and a speculative
access to them can cause SError.
Signed-off-by: Mian Yousaf Kaukab <ykaukab@...e.de>
---
arch/arm64/boot/dts/nvidia/tegra186.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/nvidia/tegra186.dtsi b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
index 58100fb9cd8b..07ce7e7b270c 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
@@ -1219,6 +1219,7 @@ sysram@...00000 {
#address-cells = <2>;
#size-cells = <2>;
ranges = <0 0x0 0x0 0x30000000 0x0 0x50000>;
+ reserved-only;
cpu_bpmp_tx: shmem@...00 {
compatible = "nvidia,tegra186-bpmp-shmem";
--
2.25.0
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