| Generic vm interface |
| ==================================== |
| |
| The virtual machine "device" also accepts the ioctls KVM_SET_DEVICE_ATTR, |
| KVM_GET_DEVICE_ATTR, and KVM_HAS_DEVICE_ATTR. The interface uses the same |
| struct kvm_device_attr as other devices, but targets VM-wide settings |
| and controls. |
| |
| The groups and attributes per virtual machine, if any, are architecture |
| specific. |
| |
| 1. GROUP: KVM_S390_VM_MEM_CTRL |
| Architectures: s390 |
| |
| 1.1. ATTRIBUTE: KVM_S390_VM_MEM_ENABLE_CMMA |
| Parameters: none |
| Returns: -EBUSY if a vcpu is already defined, otherwise 0 |
| |
| Enables Collaborative Memory Management Assist (CMMA) for the virtual machine. |
| |
| 1.2. ATTRIBUTE: KVM_S390_VM_MEM_CLR_CMMA |
| Parameters: none |
| Returns: 0 |
| |
| Clear the CMMA status for all guest pages, so any pages the guest marked |
| as unused are again used any may not be reclaimed by the host. |
