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[hyperv-next,v8,07/11] dt-bindings: microsoft,vmbus: Add interrupt and DMA coherence properties

Message ID 20250414224713.1866095-8-romank@linux.microsoft.com
State New
Headers show
Series [hyperv-next,v8,01/11] arm64: kvm, smccc: Introduce and use API for getting hypervisor UUID | expand

Commit Message

Roman Kisel April 14, 2025, 10:47 p.m. UTC 
To boot in the VTL mode, VMBus on arm64 needs interrupt description
which the binding documentation lacks. The transactions on the bus are
DMA coherent which is not mentioned as well.

Add the interrupt property and the DMA coherence property to the VMBus
binding. Update the example to match that. Fix typos.

Signed-off-by: Roman Kisel <romank@linux.microsoft.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../devicetree/bindings/bus/microsoft,vmbus.yaml | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)
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Patch

diff --git a/Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml b/Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml
index a8d40c766dcd..0bea4f5287ce 100644
--- a/Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml
+++ b/Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml
@@ -10,8 +10,8 @@  maintainers:
   - Saurabh Sengar <ssengar@linux.microsoft.com>
 
 description:
-  VMBus is a software bus that implement the protocols for communication
-  between the root or host OS and guest OSs (virtual machines).
+  VMBus is a software bus that implements the protocols for communication
+  between the root or host OS and guest OS'es (virtual machines).
 
 properties:
   compatible:
@@ -25,9 +25,16 @@  properties:
   '#size-cells':
     const: 1
 
+  dma-coherent: true
+
+  interrupts:
+    maxItems: 1
+    description: Interrupt is used to report a message from the host.
+
 required:
   - compatible
   - ranges
+  - interrupts
   - '#address-cells'
   - '#size-cells'
 
@@ -35,6 +42,8 @@  additionalProperties: false
 
 examples:
   - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
     soc {
         #address-cells = <2>;
         #size-cells = <1>;
@@ -49,6 +58,9 @@  examples:
                 #address-cells = <2>;
                 #size-cells = <1>;
                 ranges = <0x0f 0xf0000000 0x0f 0xf0000000 0x10000000>;
+                dma-coherent;
+                interrupt-parent = <&gic>;
+                interrupts = <GIC_PPI 2 IRQ_TYPE_EDGE_RISING>;
             };
         };
     };