powerpc/kvm/book3s_hv: Rework the secondary inhibit code
As part of the support for split core on POWER8, we want to be able to
block splitting of the core while KVM VMs are active.
The logic to do that would be exactly the same as the code we currently
have for inhibiting onlining of secondaries.
Instead of adding an identical mechanism to block split core, rework the
secondary inhibit code to be a "HV KVM is active" check. We can then use
that in both the cpu hotplug code and the upcoming split core code.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Acked-by: Alexander Graf <agraf@suse.de>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 8227dba..d7b74f8 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -2317,10 +2317,10 @@
spin_lock_init(&kvm->arch.slot_phys_lock);
/*
- * Don't allow secondary CPU threads to come online
- * while any KVM VMs exist.
+ * Track that we now have a HV mode VM active. This blocks secondary
+ * CPU threads from coming online.
*/
- inhibit_secondary_onlining();
+ kvm_hv_vm_activated();
return 0;
}
@@ -2336,7 +2336,7 @@
static void kvmppc_core_destroy_vm_hv(struct kvm *kvm)
{
- uninhibit_secondary_onlining();
+ kvm_hv_vm_deactivated();
kvmppc_free_vcores(kvm);
if (kvm->arch.rma) {