leandrof/u-boot
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

arm64: zynqmp: Keep SMMU disabled by default

Browse Source 
SMMU adds overhead in mapping/un-mapping of DMA buffers. It
will degrade performance numbers for some of the peripherals.
Disabling SMMU to avoid the same.
Please check Xilinx documentation for more information.

Signed-off-by: Mubin Usman Sayyed <mubin.usman.sayyed@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Mubin Usman Sayyed
2018-09-05 16:47:19 +05:30
committed by Michal Simek
parent 2c3f2141f5
commit 76e44aaf40
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/dts/zynqmp.dtsi
View File

@@ -370,7 +370,7 @@
compatible = "arm,mmu-500";
reg = <0x0 0xfd800000 0x0 0x20000>;
#iommu-cells = <1>;
status = "okay";
status = "disabled";
#global-interrupts = <1>;
interrupt-parent = <&gic>;
interrupts = <0 155 4>,