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authorCarsten Otte <cotte@de.ibm.com>2012-05-15 14:15:26 +0200
committerMarcelo Tosatti <mtosatti@redhat.com>2012-05-17 21:06:02 -0300
commit14eebd917d154f3181d2cb219e40b18eec314db7 (patch)
tree7e95ec1b713f26456f606e277526a8cc7b1f58e3 /arch/s390
parent1526bf9ccf310f1d35c1275b8b477a249d25aaf2 (diff)
KVM: s390: KVM_GET/SET_ONEREG for s390
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>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kvm/kvm-s390.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 5c761bffa02d..894b3e47b8c1 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -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;

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