linux_dsm_epyc7002/arch/arm64/boot/dts/arm
Robin Murphy 6806f2c70c arm64: dts: juno: enable some SMMUs
The IOMMU-backed DMA API support has now been in place for a while and
proven stable, so there's no real need to keep most of Juno's SMMUs
disabled. The USB, HDLCDs, and CoreSight ETR all just need to map RAM
buffers for DMA - enabling their SMMUs obviates CPU bounce buffering for
USB's streaming DMA to the upper memory bank, and lets the other two
allocate their relatively large coherent buffers without pressuring CMA.

Some more software work is still needed for the DMA-330 and PCIe before
those can accommodate SMMU translation correctly in all cases, so we
leave those alone for now.

Tested-by: Liviu Dudau <Liviu.Dudau@arm.com> [only HDLCD]
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2017-05-19 14:38:16 +01:00
..
foundation-v8-gicv3.dts arm64: dts: add .dts for GICv3 Foundation model 2016-02-09 10:46:31 +00:00
foundation-v8.dts arm64: dts: split Foundation model dts to put the GIC separately 2016-02-09 10:46:31 +00:00
foundation-v8.dtsi ARM, ARM64: dts: drop "arm,amba-bus" in favor of "simple-bus" 2016-03-12 17:40:34 -08:00
juno-base.dtsi arm64: dts: juno: enable some SMMUs 2017-05-19 14:38:16 +01:00
juno-clocks.dtsi arm64: dts: juno: remove dtsi nesting inside tree structure 2017-01-18 11:14:07 +00:00
juno-cs-r1r2.dtsi arm64: dts: juno: add CoreSight support for Juno r1/r2 variants 2017-01-18 11:14:23 +00:00
juno-motherboard.dtsi arm64: dts: juno: fix few unit address format warnings 2017-04-19 12:16:31 +01:00
juno-r1.dts arm64: dts: juno: add coresight CPU debug nodes 2017-05-19 14:30:34 +01:00
juno-r2.dts arm64: dts: juno: add coresight CPU debug nodes 2017-05-19 14:30:34 +01:00
juno.dts arm64: dts: juno: add coresight CPU debug nodes 2017-05-19 14:30:34 +01:00
Makefile arm64: dts: Add support for Juno r2 board 2016-02-09 10:46:31 +00:00
rtsm_ve-aemv8a.dts arm64: dts: vexpress: Support GICC_DIR operations 2016-12-30 15:31:24 +00:00
rtsm_ve-motherboard.dtsi ARM, ARM64: dts: drop "arm,amba-bus" in favor of "simple-bus" 2016-03-12 17:40:34 -08:00
vexpress-v2f-1xv7-ca53x2.dts arm64: dts: juno/vexpress: fix node name unit-address presence warnings 2016-03-08 13:54:27 +00:00
vexpress-v2m-rs1.dtsi ARM64: dts: vexpress: Use a symlink to vexpress-v2m-rs1.dtsi from arch=arm 2015-10-14 17:55:50 +02:00