| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 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 |