From: Carsten Otte <co...@de.ibm.com>
This patch makes vcpu epoch difference and the TOD programmable
field accessible from userspace. This is needed in order to
implement a couple of instructions that deal with the time of
day clock on s390, such as SET CLOCK and for migration.
Signed-off-by: Carsten Otte <co...@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntrae...@de.ibm.com>
---
arch/s390/include/asm/kvm.h | 3 +++
arch/s390/kvm/kvm-s390.c | 16 ++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/arch/s390/include/asm/kvm.h b/arch/s390/include/asm/kvm.h
index 9607667..53a5372 100644
--- a/arch/s390/include/asm/kvm.h
+++ b/arch/s390/include/asm/kvm.h
@@ -52,4 +52,7 @@ struct kvm_sync_regs {
__u32 acrs[16]; /* access registers */
__u64 crs[16]; /* control registers */
};
+
+#define KVM_REG_S390_TODPR (KVM_REG_S390 | KVM_REG_SIZE_U32 | 0x1)
+#define KVM_REG_S390_EPOCHDIFF (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x2)
#endif
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 894b3e4..cc4c013 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -446,6 +446,14 @@ static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu
*vcpu,
int r = -EINVAL;
switch (reg->id) {
+ case KVM_REG_S390_TODPR:
+ r = put_user(vcpu->arch.sie_block->todpr,
+ (u32 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_EPOCHDIFF:
+ r = put_user(vcpu->arch.sie_block->epoch,
+ (u64 __user *)reg->addr);
+ break;
default:
break;
}
@@ -459,6 +467,14 @@ static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu
*vcpu,
int r = -EINVAL;
switch (reg->id) {
+ case KVM_REG_S390_TODPR:
+ r = get_user(vcpu->arch.sie_block->todpr,
+ (u32 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_EPOCHDIFF:
+ r = get_user(vcpu->arch.sie_block->epoch,
+ (u64 __user *)reg->addr);
+ break;
default:
break;
}
--
1.7.10.2
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