Make s390 support KVM_ENABLE_CAP.
Reviewed-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Acked-by: Alexander Graf <agraf@xxxxxxx>
Signed-off-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
---
Documentation/virtual/kvm/api.txt | 2 +-
arch/s390/kvm/kvm-s390.c | 26 ++++++++++++++++++++++++++
2 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 8a0de30..73bd159 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -913,7 +913,7 @@ documentation when it pops into existence).
4.37 KVM_ENABLE_CAP
Capability: KVM_CAP_ENABLE_CAP
-Architectures: ppc
+Architectures: ppc, s390
Type: vcpu ioctl
Parameters: struct kvm_enable_cap (in)
Returns: 0 on success; -1 on error
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index f718bc6..5ff2603 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -140,6 +140,7 @@ int kvm_dev_ioctl_check_extension(long ext)
#endif
case KVM_CAP_SYNC_REGS:
case KVM_CAP_ONE_REG:
+ case KVM_CAP_ENABLE_CAP:
r = 1;
break;
case KVM_CAP_NR_VCPUS:
@@ -808,6 +809,22 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
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,
unsigned int ioctl, unsigned long arg)
{
@@ -894,6 +911,15 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
r = 0;
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:
r = -ENOTTY;
}
--
1.7.12.4
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