Add function pointers in PCMachineState to handle apic id specific
functionalities. This will be used to initialize with correct
handlers based on mode selected.

x86_apicid_from_cpu_idx will be default handler.

Signed-off-by: Babu Moger <babu.moger@amd.com>
---
 hw/i386/pc.c         |    5 ++++-
 include/hw/i386/pc.h |    4 ++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 504e1ab083..69a6b82186 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -947,7 +947,7 @@ static uint32_t x86_cpu_apic_id_from_index(PCMachineState *pcms,
 
     initialize_topo_info(&topo_info, pcms, ms);
 
-    correct_id = x86_apicid_from_cpu_idx(&topo_info, cpu_index);
+    correct_id = pcms->apicid_from_cpu_idx(&topo_info, cpu_index);
     if (pcmc->compat_apic_id_mode) {
         if (cpu_index != correct_id && !warned && !qtest_enabled()) {
             error_report("APIC IDs set in compatibility mode, "
@@ -2828,6 +2828,9 @@ static void pc_machine_initfn(Object *obj)
     pcms->pit_enabled = true;
     pcms->smp_dies = 1;
 
+    /* Initialize the apic id related handlers */
+    pcms->apicid_from_cpu_idx = x86_apicid_from_cpu_idx;
+
     pc_system_flash_create(pcms);
 }
 
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 859b64c51d..6cefefdd57 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -17,6 +17,7 @@
 #include "hw/mem/pc-dimm.h"
 #include "hw/mem/nvdimm.h"
 #include "hw/acpi/acpi_dev_interface.h"
+#include "hw/i386/topology.h"
 
 #define HPET_INTCAP "hpet-intcap"
 
@@ -66,6 +67,9 @@ struct PCMachineState {
     uint64_t numa_nodes;
     uint64_t *node_mem;
 
+    /* Apic id specific handlers */
+    uint32_t (*apicid_from_cpu_idx)(X86CPUTopoInfo *topo_info, unsigned cpu_index);
+
     /* Address space used by IOAPIC device. All IOAPIC interrupts
      * will be translated to MSI messages in the address space. */
     AddressSpace *ioapic_as;