[PATCH RESEND 04/15] ppc: spapr: Start using nested.api for nested kvm-hv api

[Harsh Prateek Bora <harshpb@linux.ibm.com>]

With this patch, isolating kvm-hv nested api code to be executed only
when cap-nested-hv is set. This helps keeping api specific logic
mutually exclusive.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
---
 hw/ppc/spapr.c      | 7 ++++++-
 hw/ppc/spapr_caps.c | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index e44686b04d..0aa9f21516 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1334,8 +1334,11 @@ static bool spapr_get_pate(PPCVirtualHypervisor *vhyp, PowerPCCPU *cpu,
         /* Copy PATE1:GR into PATE0:HR */
         entry->dw0 = spapr->patb_entry & PATE0_HR;
         entry->dw1 = spapr->patb_entry;
+        return true;
+    }
+    assert(spapr->nested.api);
 
-    } else {
+    if (spapr->nested.api == NESTED_API_KVM_HV) {
         uint64_t patb, pats;
 
         assert(lpid != 0);
@@ -3437,6 +3440,8 @@ static void spapr_instance_init(Object *obj)
         spapr_get_host_serial, spapr_set_host_serial);
     object_property_set_description(obj, "host-serial",
         "Host serial number to advertise in guest device tree");
+    /* Nested */
+    spapr->nested.api = 0;
 }
 
 static void spapr_machine_finalizefn(Object *obj)
diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c
index 5a0755d34f..a3a790b026 100644
--- a/hw/ppc/spapr_caps.c
+++ b/hw/ppc/spapr_caps.c
@@ -454,6 +454,7 @@ static void cap_nested_kvm_hv_apply(SpaprMachineState *spapr,
         return;
     }
 
+    spapr->nested.api = NESTED_API_KVM_HV;
     if (kvm_enabled()) {
         if (!ppc_check_compat(cpu, CPU_POWERPC_LOGICAL_3_00, 0,
                               spapr->max_compat_pvr)) {
-- 
2.39.3