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Commit 29b7c71b authored by Carsten Otte's avatar Carsten Otte Committed by Marcelo Tosatti
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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: default avatarCarsten Otte <cotte@de.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 14eebd91

arch/s390/include/asm/kvm.h

+3 −0
Original line number Diff line number Diff line
@@ -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

arch/s390/kvm/kvm-s390.c

+16 −0
Original line number Diff line number Diff line
@@ -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;

	}