KVM: PPC: Add support for ePAPR idle hcall in host kernel
And add a new flag definition in kvm_ppc_pvinfo to indicate
whether the host supports the EV_IDLE hcall.
Signed-off-by: Liu Yu <yu.liu@freescale.com>
[stuart.yoder@freescale.com: cleanup,fixes for conditions allowing idle]
Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
[agraf: fix typo]
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index a478e66..dbf56e1 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -38,8 +38,7 @@
int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
{
- return !(v->arch.shared->msr & MSR_WE) ||
- !!(v->arch.pending_exceptions) ||
+ return !!(v->arch.pending_exceptions) ||
v->requests;
}
@@ -86,6 +85,11 @@
/* Second return value is in r4 */
break;
+ case EV_HCALL_TOKEN(EV_IDLE):
+ r = EV_SUCCESS;
+ kvm_vcpu_block(vcpu);
+ clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
+ break;
default:
r = EV_UNIMPLEMENTED;
break;
@@ -779,6 +783,8 @@
pvinfo->hcall[3] = inst_nop;
#endif
+ pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
+
return 0;
}