forked from Minki/linux
KVM: s390: epoch difference and TOD programmable field
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 <cotte@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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@ -52,4 +52,7 @@ struct kvm_sync_regs {
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__u32 acrs[16]; /* access registers */
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__u64 crs[16]; /* control registers */
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};
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#define KVM_REG_S390_TODPR (KVM_REG_S390 | KVM_REG_SIZE_U32 | 0x1)
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#define KVM_REG_S390_EPOCHDIFF (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x2)
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#endif
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@ -446,6 +446,14 @@ static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
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int r = -EINVAL;
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switch (reg->id) {
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case KVM_REG_S390_TODPR:
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r = put_user(vcpu->arch.sie_block->todpr,
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(u32 __user *)reg->addr);
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break;
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case KVM_REG_S390_EPOCHDIFF:
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r = put_user(vcpu->arch.sie_block->epoch,
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(u64 __user *)reg->addr);
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break;
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default:
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break;
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}
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@ -459,6 +467,14 @@ static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
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int r = -EINVAL;
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switch (reg->id) {
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case KVM_REG_S390_TODPR:
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r = get_user(vcpu->arch.sie_block->todpr,
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(u32 __user *)reg->addr);
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break;
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case KVM_REG_S390_EPOCHDIFF:
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r = get_user(vcpu->arch.sie_block->epoch,
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(u64 __user *)reg->addr);
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break;
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default:
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break;
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}
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