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