apic: use emulated lapic version 0x14 on pc machines >= 2.1

Add "version" property to local apic, and have it default to
0x14 for pc machines starting at 2.1. For compatibility with
previous releases, pc machines up to 2.0 will have their local
apic version set to 0x11.

Signed-off-by: Gabriel L. Somlo <somlo@cmu.edu>
Acked-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/intc/apic.c

@@ -675,7 +675,7 @@ static uint32_t apic_mem_readl(void *opaque, hwaddr addr)
         val = s->id << 24;
         break;
     case 0x03: /* version */
-        val = 0x11 | ((APIC_LVT_NB - 1) << 16); /* version 0x11 */
+        val = s->version | ((APIC_LVT_NB - 1) << 16);
         break;
     case 0x08:
         apic_sync_vapic(s, SYNC_FROM_VAPIC);

hw/intc/apic_common.c

@@ -380,6 +380,7 @@ static const VMStateDescription vmstate_apic_common = {
 
 static Property apic_properties_common[] = {
     DEFINE_PROP_UINT8("id", APICCommonState, id, -1),
+    DEFINE_PROP_UINT8("version", APICCommonState, version, 0x14),
     DEFINE_PROP_BIT("vapic", APICCommonState, vapic_control, VAPIC_ENABLE_BIT,
                     true),
     DEFINE_PROP_END_OF_LIST(),

include/hw/i386/apic_internal.h

@@ -98,6 +98,7 @@ struct APICCommonState {
     X86CPU *cpu;
     uint32_t apicbase;
     uint8_t id;
+    uint8_t version;
     uint8_t arb_id;
     uint8_t tpr;
     uint32_t spurious_vec;

include/hw/i386/pc.h

@@ -268,6 +268,9 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
 
 #define PC_COMPAT_2_0 \
         {\
+            .driver   = "apic",\
+            .property = "version",\
+            .value    = stringify(0x11),\
         }
 
 #define PC_COMPAT_1_7 \