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KVM: s390: Base infrastructure for enabling capabilities. 

Make s390 support KVM_ENABLE_CAP.

Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Cornelia Huck 2012-12-20 15:32:11 +01:00 committed by Marcelo Tosatti
parent f379aae558
commit d6712df95b
2 changed files with 27 additions and 1 deletions
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2
Documentation/virtual/kvm/api.txt
View File

@ -913,7 +913,7 @@ documentation when it pops into existence).
4.37 KVM_ENABLE_CAP 4.37 KVM_ENABLE_CAP
Capability: KVM_CAP_ENABLE_CAP Capability: KVM_CAP_ENABLE_CAP
Architectures: ppc Architectures: ppc, s390
Type: vcpu ioctl Type: vcpu ioctl
Parameters: struct kvm_enable_cap (in) Parameters: struct kvm_enable_cap (in)
Returns: 0 on success; -1 on error Returns: 0 on success; -1 on error

26
arch/s390/kvm/kvm-s390.c
View File

@ -140,6 +140,7 @@ int kvm_dev_ioctl_check_extension(long ext)
#endif #endif
case KVM_CAP_SYNC_REGS: case KVM_CAP_SYNC_REGS:
case KVM_CAP_ONE_REG: case KVM_CAP_ONE_REG:
case KVM_CAP_ENABLE_CAP:
r = 1; r = 1;
break; break;
case KVM_CAP_NR_VCPUS: case KVM_CAP_NR_VCPUS:
@ -808,6 +809,22 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
return 0; return 0;
} }
static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
struct kvm_enable_cap *cap)
{
int r;
if (cap->flags)
return -EINVAL;
switch (cap->cap) {
default:
r = -EINVAL;
break;
}
return r;
}
long kvm_arch_vcpu_ioctl(struct file *filp, long kvm_arch_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg) unsigned int ioctl, unsigned long arg)
{ {
@ -894,6 +911,15 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
r = 0; r = 0;
break; break;
} }
case KVM_ENABLE_CAP:
{
struct kvm_enable_cap cap;
r = -EFAULT;
if (copy_from_user(&cap, argp, sizeof(cap)))
break;
r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
break;
}
default: default:
r = -ENOTTY; r = -ENOTTY;
} }