[PATCH] arm64: tegra: only map accessible sysram

Mian Yousaf Kaukab
2019-09-29T20:09:40Z

Most of the SysRAM is secure and only accessible by TF-A.
Don't map this inaccessible memory in kernel. Only map pages
used by bpmp driver.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
---
Only tegra186 is tested. Tested on Jetson TX2.

arch/arm64/boot/dts/nvidia/tegra186.dtsi | 14 +++++++-------
arch/arm64/boot/dts/nvidia/tegra194.dtsi | 14 +++++++-------
2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/boot/dts/nvidia/tegra186.dtsi b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
index 47cd831fcf44..a861f46125fd 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
@@ -1174,23 +1174,23 @@
power-domains = <&bpmp TEGRA186_POWER_DOMAIN_GPU>;
};

- sysram@30000000 {
+ sysram@3004e000 {
compatible = "nvidia,tegra186-sysram", "mmio-sram";
- reg = <0x0 0x30000000 0x0 0x50000>;
+ reg = <0x0 0x3004e000 0x0 0x2000>;
#address-cells = <2>;
#size-cells = <2>;
- ranges = <0 0x0 0x0 0x30000000 0x0 0x50000>;
+ ranges = <0 0x0 0x0 0x3004e000 0x0 0x2000>;

- cpu_bpmp_tx: shmem@4e000 {
+ cpu_bpmp_tx: shmem@e000 {
compatible = "nvidia,tegra186-bpmp-shmem";
- reg = <0x0 0x4e000 0x0 0x1000>;
+ reg = <0x0 0x0 0x0 0x1000>;
label = "cpu-bpmp-tx";
pool;
};

- cpu_bpmp_rx: shmem@4f000 {
+ cpu_bpmp_rx: shmem@f000 {
compatible = "nvidia,tegra186-bpmp-shmem";
- reg = <0x0 0x4f000 0x0 0x1000>;
+ reg = <0x0 0x1000 0x0 0x1000>;
label = "cpu-bpmp-rx";
pool;
};
diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
index 3c0cf54f0aab..98b9399d6b7f 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
@@ -1430,23 +1430,23 @@
0x82000000 0x0 0x40000000 0x1f 0x40000000 0x0 0xc0000000>; /* non-prefetchable memory (3GB) */
};

- sysram@40000000 {
+ sysram@4004e000 {
compatible = "nvidia,tegra194-sysram", "mmio-sram";
- reg = <0x0 0x40000000 0x0 0x50000>;
+ reg = <0x0 0x4004e000 0x0 0x2000>;
#address-cells = <1>;
#size-cells = <1>;
- ranges = <0x0 0x0 0x40000000 0x50000>;
+ ranges = <0x0 0x0 0x4004e000 0x2000>;

- cpu_bpmp_tx: shmem@4e000 {
+ cpu_bpmp_tx: shmem@e000 {
compatible = "nvidia,tegra194-bpmp-shmem";
- reg = <0x4e000 0x1000>;
+ reg = <0x0 0x1000>;
label = "cpu-bpmp-tx";
pool;
};

- cpu_bpmp_rx: shmem@4f000 {
+ cpu_bpmp_rx: shmem@f000 {
compatible = "nvidia,tegra194-bpmp-shmem";
- reg = <0x4f000 0x1000>;
+ reg = <0x1000 0x1000>;
label = "cpu-bpmp-rx";
pool;
};
--
2.16.4