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KVM: PPC: Add support for ePAPR idle hcall in host kernel

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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>
This commit is contained in:
Liu Yu-B13201
2012-07-03 05:48:52 +00:00
committed by Alexander Graf
parent 784bafac79
commit 9202e07636
4 changed files with 16 additions and 4 deletions
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10
arch/powerpc/kvm/powerpc.c
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@@ -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 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
/* 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 @@ static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
pvinfo->hcall[3] = inst_nop;
#endif
pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
return 0;
}