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KVM: async_pf: Exploit one reg interface for pfault

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To enable pfault after live migration we need to expose pfault_token,
pfault_select and pfault_compare, as one reg registers to userspace.

So that qemu is able to transfer this between the source and the target.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Dominik Dingel 2013-09-30 10:55:33 +02:00 committed by Christian Borntraeger
parent 3c038e6be0
commit 536336c216
2 changed files with 27 additions and 0 deletions
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3
arch/s390/include/uapi/asm/kvm.h
View file

@ -73,4 +73,7 @@ struct kvm_sync_regs {
#define KVM_REG_S390_EPOCHDIFF (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x2)
#define KVM_REG_S390_CPU_TIMER (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x3)
#define KVM_REG_S390_CLOCK_COMP (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x4)
#define KVM_REG_S390_PFTOKEN (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x5)
#define KVM_REG_S390_PFCOMPARE (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x6)
#define KVM_REG_S390_PFSELECT (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x7)
#endif

24
arch/s390/kvm/kvm-s390.c
View file

@ -561,6 +561,18 @@ static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
r = put_user(vcpu->arch.sie_block->ckc,
(u64 __user *)reg->addr);
break;
case KVM_REG_S390_PFTOKEN:
r = put_user(vcpu->arch.pfault_token,
(u64 __user *)reg->addr);
break;
case KVM_REG_S390_PFCOMPARE:
r = put_user(vcpu->arch.pfault_compare,
(u64 __user *)reg->addr);
break;
case KVM_REG_S390_PFSELECT:
r = put_user(vcpu->arch.pfault_select,
(u64 __user *)reg->addr);
break;
default:
break;
}
@ -590,6 +602,18 @@ static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
r = get_user(vcpu->arch.sie_block->ckc,
(u64 __user *)reg->addr);
break;
case KVM_REG_S390_PFTOKEN:
r = get_user(vcpu->arch.pfault_token,
(u64 __user *)reg->addr);
break;
case KVM_REG_S390_PFCOMPARE:
r = get_user(vcpu->arch.pfault_compare,
(u64 __user *)reg->addr);
break;
case KVM_REG_S390_PFSELECT:
r = get_user(vcpu->arch.pfault_select,
(u64 __user *)reg->addr);
break;
default:
break;
}