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-rw-r--r--include/hw/i386/apic_internal.h1
-rw-r--r--include/hw/i386/pc.h5
2 files changed, 6 insertions, 0 deletions
diff --git a/include/hw/i386/apic_internal.h b/include/hw/i386/apic_internal.h
index e549a62e7f..06c4e9f6f9 100644
--- a/include/hw/i386/apic_internal.h
+++ b/include/hw/i386/apic_internal.h
@@ -183,6 +183,7 @@ struct APICCommonState {
     uint32_t vapic_control;
     DeviceState *vapic;
     hwaddr vapic_paddr; /* note: persistence via kvmvapic */
+    bool legacy_instance_id;
 };
 
 typedef struct VAPICState {
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 47411cbde4..bc937b989e 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -382,6 +382,11 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
         .driver = TYPE_X86_CPU,\
         .property = "fill-mtrr-mask",\
         .value = "off",\
+    },\
+    {\
+        .driver   = "apic",\
+        .property = "legacy-instance-id",\
+        .value    = "on",\
     },
 
 #define PC_COMPAT_2_5 \