From 4f718eab262868aeab83774ec4ce25e6a9906657 Mon Sep 17 00:00:00 2001 From: Dominik Dingel Date: Wed, 9 Apr 2014 13:13:00 +0200 Subject: 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 Signed-off-by: Christian Borntraeger --- Documentation/virtual/kvm/devices/vm.txt | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'Documentation/virtual') 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. -- cgit v1.2.3-70-g09d2