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