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KVM: s390: Per-vm kvm device controls

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We sometimes need to get/set attributes specific to a virtual machine
and so need something else than ONE_REG.

Let's copy the KVM_DEVICE approach, and define the respective ioctls
for the vm file descriptor.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Dominik Dingel
2014-04-09 13:13:00 +02:00
committed by Christian Borntraeger
parent 15f36ebd34
commit f206165620
4 changed files with 69 additions and 4 deletions
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8
Documentation/virtual/kvm/api.txt
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@@ -2314,8 +2314,8 @@ struct kvm_create_device {
4.80 KVM_SET_DEVICE_ATTR/KVM_GET_DEVICE_ATTR
Capability: KVM_CAP_DEVICE_CTRL
Type: device ioctl
Capability: KVM_CAP_DEVICE_CTRL, KVM_CAP_VM_ATTRIBUTES for vm device
Type: device ioctl, vm ioctl
Parameters: struct kvm_device_attr
Returns: 0 on success, -1 on error
Errors:
@@ -2340,8 +2340,8 @@ struct kvm_device_attr {
4.81 KVM_HAS_DEVICE_ATTR
Capability: KVM_CAP_DEVICE_CTRL
Type: device ioctl
Capability: KVM_CAP_DEVICE_CTRL, KVM_CAP_VM_ATTRIBUTES for vm device
Type: device ioctl, vm ioctl
Parameters: struct kvm_device_attr
Returns: 0 on success, -1 on error
Errors:

10
Documentation/virtual/kvm/devices/vm.txt Normal file
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@@ -0,0 +1,10 @@
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.