path: root/Documentation/devicetree/bindings/reserved-memory/xen,shared-memory.txt
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+* Xen hypervisor reserved-memory binding
+Expose one or more memory regions as reserved-memory to the guest
+virtual machine. Typically, a region is configured at VM creation time
+to be a shared memory area across multiple virtual machines for
+communication among them.
+For each of these pre-shared memory regions, a range is exposed under
+the /reserved-memory node as a child node. Each range sub-node is named
+xen-shmem@<address> and has the following properties:
+- compatible:
+ compatible = "xen,shared-memory-v1"
+- reg:
+ the base guest physical address and size of the shared memory region
+- xen,offset: (borrower VMs only)
+ 64 bit integer offset within the owner virtual machine's shared
+ memory region used for the mapping in the borrower VM.
+- xen,id:
+ a string that identifies the shared memory region as specified in
+ the VM config file