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- 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_CTRL
- Parameters: none
- Returns: -EBUSY if already a vcpus is defined, otherwise 0
- Enables CMMA for the virtual machine
- 1.2. ATTRIBUTE: KVM_S390_VM_CLR_CMMA
- Parameteres: 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.
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