1*c66ec88fSEmmanuel Vadot* Xen hypervisor reserved-memory binding 2*c66ec88fSEmmanuel Vadot 3*c66ec88fSEmmanuel VadotExpose one or more memory regions as reserved-memory to the guest 4*c66ec88fSEmmanuel Vadotvirtual machine. Typically, a region is configured at VM creation time 5*c66ec88fSEmmanuel Vadotto be a shared memory area across multiple virtual machines for 6*c66ec88fSEmmanuel Vadotcommunication among them. 7*c66ec88fSEmmanuel Vadot 8*c66ec88fSEmmanuel VadotFor each of these pre-shared memory regions, a range is exposed under 9*c66ec88fSEmmanuel Vadotthe /reserved-memory node as a child node. Each range sub-node is named 10*c66ec88fSEmmanuel Vadotxen-shmem@<address> and has the following properties: 11*c66ec88fSEmmanuel Vadot 12*c66ec88fSEmmanuel Vadot- compatible: 13*c66ec88fSEmmanuel Vadot compatible = "xen,shared-memory-v1" 14*c66ec88fSEmmanuel Vadot 15*c66ec88fSEmmanuel Vadot- reg: 16*c66ec88fSEmmanuel Vadot the base guest physical address and size of the shared memory region 17*c66ec88fSEmmanuel Vadot 18*c66ec88fSEmmanuel Vadot- xen,offset: (borrower VMs only) 19*c66ec88fSEmmanuel Vadot 64 bit integer offset within the owner virtual machine's shared 20*c66ec88fSEmmanuel Vadot memory region used for the mapping in the borrower VM. 21*c66ec88fSEmmanuel Vadot 22*c66ec88fSEmmanuel Vadot- xen,id: 23*c66ec88fSEmmanuel Vadot a string that identifies the shared memory region as specified in 24*c66ec88fSEmmanuel Vadot the VM config file 25