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| author | Dominik Dingel <dingel@linux.vnet.ibm.com> | 2014-04-09 13:13:00 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-04-22 13:24:32 +0200 |
| commit | 4f718eab262868aeab83774ec4ce25e6a9906657 (patch) | |
| tree | e5913e863cea1909a1cac6b9f1cafcf4f57ef446 /Documentation/virtual | |
| parent | b31605c12f4edda7a40ad9f86985739666298c31 (diff) | |
| download | lwn-4f718eab262868aeab83774ec4ce25e6a9906657.tar.gz lwn-4f718eab262868aeab83774ec4ce25e6a9906657.zip | |
KVM: s390: Exploiting generic userspace interface for cmma
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>
Diffstat (limited to 'Documentation/virtual')
| -rw-r--r-- | Documentation/virtual/kvm/devices/vm.txt | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/devices/vm.txt b/Documentation/virtual/kvm/devices/vm.txt index 562bee6e600b..0d16f96c0eac 100644 --- a/Documentation/virtual/kvm/devices/vm.txt +++ b/Documentation/virtual/kvm/devices/vm.txt @@ -8,3 +8,19 @@ 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. |