Commit aad3c1d9 authored by David Hildenbrand's avatar David Hildenbrand Committed by Christian Borntraeger

KVM: s390: add documentation of KVM_S390_VM_TOD

Let's properly document KVM_S390_VM_TOD and its attributes.
Reviewed-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent efa48163
...@@ -84,3 +84,22 @@ Returns: -EBUSY in case 1 or more vcpus are already activated (only in write ...@@ -84,3 +84,22 @@ Returns: -EBUSY in case 1 or more vcpus are already activated (only in write
-EFAULT if the given address is not accessible from kernel space -EFAULT if the given address is not accessible from kernel space
-ENOMEM if not enough memory is available to process the ioctl -ENOMEM if not enough memory is available to process the ioctl
0 in case of success 0 in case of success
3. GROUP: KVM_S390_VM_TOD
Architectures: s390
3.1. ATTRIBUTE: KVM_S390_VM_TOD_HIGH
Allows user space to set/get the TOD clock extension (u8).
Parameters: address of a buffer in user space to store the data (u8) to
Returns: -EFAULT if the given address is not accessible from kernel space
-EINVAL if setting the TOD clock extension to != 0 is not supported
3.2. ATTRIBUTE: KVM_S390_VM_TOD_LOW
Allows user space to set/get bits 0-63 of the TOD clock register as defined in
the POP (u64).
Parameters: address of a buffer in user space to store the data (u64) to
Returns: -EFAULT if the given address is not accessible from kernel space
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