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Documentation: dt: keystone: ti-sci: Add optional host-id parameter

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Texas Instrument's System Control Interface (TISCI) permits
the ability for OSs running in virtual machines to be able to
independently communicate with the firmware without the need going
through an hypervisor.

The "host-id" in effect is the hardware representation of the
host (example: VMs locked to a core) as identified to the System
Controller. Hypervisors can either fill in appropriate host-ids in dt
used for each VM instance OR may use prebuilt blobs where the host-ids
are pre-populated, as appropriate for the OS running in the VMs.

This is introduced as an optional parameter to maintain consistency
with legacy device tree blobs.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
This commit is contained in:
Nishanth Menon 2018-08-28 13:22:10 -07:00 committed by Santosh Shilimkar
parent 5b394b2ddf
commit 79a79c3a0e
1 changed files with 4 additions and 0 deletions
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4
Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
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@ -45,11 +45,15 @@ Optional Properties:
debug_messages - Map the Debug message region
- reg: register space corresponding to the debug_messages
- ti,system-reboot-controller: If system reboot can be triggered by SoC reboot
- ti,host-id: Integer value corresponding to the host ID assigned by Firmware
for identification of host processing entities such as virtual
machines
Example (K2G):
-------------
pmmc: pmmc {
compatible = "ti,k2g-sci";
ti,host-id = <2>;
mbox-names = "rx", "tx";
mboxes= <&msgmgr &msgmgr_proxy_pmmc_rx>,
<&msgmgr &msgmgr_proxy_pmmc_tx>;