[Xen-devel] [PATCH RFC V10 13/18] kvm : Fold pv_unhalt flag into GET_MP_STATE ioctl to aid migration

[Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>]

kvm : Fold pv_unhalt flag into GET_MP_STATE ioctl to aid migration

From: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>

During migration, any vcpu that got kicked but did not become runnable
(still in halted state) should be runnable after migration.

Signed-off-by: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>
---
 arch/x86/kvm/x86.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f8bea30..92a9932 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6243,7 +6243,12 @@ int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu 
*vcpu,
                                    struct kvm_mp_state *mp_state)
 {
        kvm_apic_accept_events(vcpu);
-       mp_state->mp_state = vcpu->arch.mp_state;
+       if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED &&
+                                       vcpu->arch.pv.pv_unhalted)
+               mp_state->mp_state = KVM_MP_STATE_RUNNABLE;
+       else
+               mp_state->mp_state = vcpu->arch.mp_state;
+
        return 0;
 }
 


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