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 <ykau...@suse.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@30000000 {
#address-cells = <2>;
#size-cells = <2>;
ranges = <0 0x0 0x0 0x30000000 0x0 0x50000>;
+ reserved-only;
cpu_bpmp_tx: shmem@4e000 {
compatible = "nvidia,tegra186-bpmp-shmem";
--
2.25.0
