4f718eab26
To enable CMMA and to reset its state we use the vm kvm_device ioctls, encapsulating attributes within the KVM_S390_VM_MEM_CTRL group. Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
27 lines
782 B
Plaintext
27 lines
782 B
Plaintext
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.
|