KVM: PPC: Add OSI hypercall interface
MOL uses its own hypercall interface to call back into userspace when
the guest wants to do something.
So let's implement that as an exit reason, specify it with a CAP and
only really use it when userspace wants us to.
The only user of it so far is MOL.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 646bfd2..9a4dd81 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -151,6 +151,7 @@
case KVM_CAP_PPC_PAIRED_SINGLES:
case KVM_CAP_PPC_UNSET_IRQ:
case KVM_CAP_ENABLE_CAP:
+ case KVM_CAP_PPC_OSI:
r = 1;
break;
case KVM_CAP_COALESCED_MMIO:
@@ -433,6 +434,13 @@
if (!vcpu->arch.dcr_is_write)
kvmppc_complete_dcr_load(vcpu, run);
vcpu->arch.dcr_needed = 0;
+ } else if (vcpu->arch.osi_needed) {
+ u64 *gprs = run->osi.gprs;
+ int i;
+
+ for (i = 0; i < 32; i++)
+ kvmppc_set_gpr(vcpu, i, gprs[i]);
+ vcpu->arch.osi_needed = 0;
}
kvmppc_core_deliver_interrupts(vcpu);
@@ -475,6 +483,10 @@
return -EINVAL;
switch (cap->cap) {
+ case KVM_CAP_PPC_OSI:
+ r = 0;
+ vcpu->arch.osi_enabled = true;
+ break;
default:
r = -EINVAL;
break;