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KVM: s390: KVM_GET/SET_ONEREG for s390

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This patch enables KVM_CAP_ONE_REG for s390 and implements stubs
for KVM_GET/SET_ONE_REG. This is based on the ppc implementation.

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>
This commit is contained in:
Carsten Otte 2012-05-15 14:15:26 +02:00 committed by Marcelo Tosatti
parent 1526bf9ccf
commit 14eebd917d
1 changed files with 38 additions and 0 deletions
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38
arch/s390/kvm/kvm-s390.c
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@ -135,6 +135,7 @@ int kvm_dev_ioctl_check_extension(long ext)
case KVM_CAP_S390_UCONTROL:
#endif
case KVM_CAP_SYNC_REGS:
case KVM_CAP_ONE_REG:
r = 1;
break;
case KVM_CAP_NR_VCPUS:
@ -439,6 +440,31 @@ int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
return 0;
}
static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
struct kvm_one_reg *reg)
{
int r = -EINVAL;
switch (reg->id) {
default:
break;
}
return r;
}
static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
struct kvm_one_reg *reg)
{
int r = -EINVAL;
switch (reg->id) {
default:
break;
}
return r;
}
static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
{
@ -770,6 +796,18 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
case KVM_S390_INITIAL_RESET:
r = kvm_arch_vcpu_ioctl_initial_reset(vcpu);
break;
case KVM_SET_ONE_REG:
case KVM_GET_ONE_REG: {
struct kvm_one_reg reg;
r = -EFAULT;
if (copy_from_user(&reg, argp, sizeof(reg)))
break;
if (ioctl == KVM_SET_ONE_REG)
r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, &reg);
else
r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, &reg);
break;
}
#ifdef CONFIG_KVM_S390_UCONTROL
case KVM_S390_UCAS_MAP: {
struct kvm_s390_ucas_mapping ucasmap;