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KVM: s390: Provide guest TOD Clock Get/Set Controls

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Provide controls for setting/getting the guest TOD clock based on the VM
attribute interface.

Provide TOD and TOD_HIGH vm attributes on s390 for managing guest Time Of
Day clock value.

TOD_HIGH is presently always set to 0. In the future it will contain a high
order expansion of the tod clock value after it overflows the 64-bits of
the TOD.

Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Jason J. Herne
2014-11-25 09:46:02 -05:00
committed by Christian Borntraeger
parent 556cc0dab1
commit 72f250206f
3 changed files with 134 additions and 0 deletions
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5
arch/s390/include/uapi/asm/kvm.h
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@@ -57,12 +57,17 @@ struct kvm_s390_io_adapter_req {
/* kvm attr_group on vm fd */
#define KVM_S390_VM_MEM_CTRL 0
#define KVM_S390_VM_TOD 1
/* kvm attributes for mem_ctrl */
#define KVM_S390_VM_MEM_ENABLE_CMMA 0
#define KVM_S390_VM_MEM_CLR_CMMA 1
#define KVM_S390_VM_MEM_LIMIT_SIZE 2
/* kvm attributes for KVM_S390_VM_TOD */
#define KVM_S390_VM_TOD_LOW 0
#define KVM_S390_VM_TOD_HIGH 1
/* for KVM_GET_REGS and KVM_SET_REGS */
struct kvm_regs {
/* general purpose regs for s390 */