The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/reserved-memory/xen,shared-memory.txt

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    1 * Xen hypervisor reserved-memory binding
    2 
    3 Expose one or more memory regions as reserved-memory to the guest
    4 virtual machine. Typically, a region is configured at VM creation time
    5 to be a shared memory area across multiple virtual machines for
    6 communication among them.
    7 
    8 For each of these pre-shared memory regions, a range is exposed under
    9 the /reserved-memory node as a child node. Each range sub-node is named
   10 xen-shmem@<address> and has the following properties:
   11 
   12 - compatible:
   13         compatible = "xen,shared-memory-v1"
   14 
   15 - reg:
   16         the base guest physical address and size of the shared memory region
   17 
   18 - xen,offset: (borrower VMs only)
   19         64 bit integer offset within the owner virtual machine's shared
   20         memory region used for the mapping in the borrower VM.
   21 
   22 - xen,id:
   23         a string that identifies the shared memory region as specified in
   24         the VM config file

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