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KVM: s390: Create ioctl for Getting/Setting guest storage keys

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Provide the KVM_S390_GET_SKEYS and KVM_S390_SET_SKEYS ioctl which can be used
to get/set guest storage keys. This functionality is needed for live migration
of s390 guests that use storage keys.

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
2014-09-23 09:23:01 -04:00
committed by Christian Borntraeger
parent e44fc8c9da
commit 30ee2a984f
3 changed files with 195 additions and 0 deletions
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14
include/uapi/linux/kvm.h
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@@ -147,6 +147,16 @@ struct kvm_pit_config {
#define KVM_PIT_SPEAKER_DUMMY 1
struct kvm_s390_skeys {
__u64 start_gfn;
__u64 count;
__u64 skeydata_addr;
__u32 flags;
__u32 reserved[9];
};
#define KVM_S390_GET_SKEYS_NONE 1
#define KVM_S390_SKEYS_MAX 1048576
#define KVM_EXIT_UNKNOWN 0
#define KVM_EXIT_EXCEPTION 1
#define KVM_EXIT_IO 2
@@ -791,6 +801,7 @@ struct kvm_ppc_smmu_info {
#define KVM_CAP_S390_VECTOR_REGISTERS 107
#define KVM_CAP_S390_MEM_OP 108
#define KVM_CAP_S390_USER_STSI 109
#define KVM_CAP_S390_SKEYS 110
#ifdef KVM_CAP_IRQ_ROUTING
@@ -1168,6 +1179,9 @@ struct kvm_s390_ucas_mapping {
#define KVM_GET_REG_LIST _IOWR(KVMIO, 0xb0, struct kvm_reg_list)
/* Available with KVM_CAP_S390_MEM_OP */
#define KVM_S390_MEM_OP _IOW(KVMIO, 0xb1, struct kvm_s390_mem_op)
/* Available with KVM_CAP_S390_SKEYS */
#define KVM_S390_GET_SKEYS _IOW(KVMIO, 0xb2, struct kvm_s390_skeys)
#define KVM_S390_SET_SKEYS _IOW(KVMIO, 0xb3, struct kvm_s390_skeys)
#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
#define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1)