1 files changed, 43 insertions, 0 deletions

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 7b9f92d51c..4770dd8c67 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -41,6 +41,7 @@
 #include "hw/irq.h"
 #include "sysemu/sev.h"
 #include "sysemu/balloon.h"
+#include "qapi/visitor.h"
 
 #include "hw/boards.h"
 
@@ -92,6 +93,7 @@ struct KVMState
     int max_nested_state_len;
     int many_ioeventfds;
     int intx_set_mask;
+    int kvm_shadow_mem;
     bool sync_mmu;
     bool manual_dirty_log_protect;
     /* The man page (and posix) say ioctl numbers are signed int, but
@@ -2954,6 +2956,40 @@ static bool kvm_accel_has_memory(MachineState *ms, AddressSpace *as,
     return false;
 }
 
+static void kvm_get_kvm_shadow_mem(Object *obj, Visitor *v,
+                                   const char *name, void *opaque,
+                                   Error **errp)
+{
+    KVMState *s = KVM_STATE(obj);
+    int64_t value = s->kvm_shadow_mem;
+
+    visit_type_int(v, name, &value, errp);
+}
+
+static void kvm_set_kvm_shadow_mem(Object *obj, Visitor *v,
+                                   const char *name, void *opaque,
+                                   Error **errp)
+{
+    KVMState *s = KVM_STATE(obj);
+    Error *error = NULL;
+    int64_t value;
+
+    visit_type_int(v, name, &value, &error);
+    if (error) {
+        error_propagate(errp, error);
+        return;
+    }
+
+    s->kvm_shadow_mem = value;
+}
+
+static void kvm_accel_instance_init(Object *obj)
+{
+    KVMState *s = KVM_STATE(obj);
+
+    s->kvm_shadow_mem = -1;
+}
+
 static void kvm_accel_class_init(ObjectClass *oc, void *data)
 {
     AccelClass *ac = ACCEL_CLASS(oc);
@@ -2961,11 +2997,18 @@ static void kvm_accel_class_init(ObjectClass *oc, void *data)
     ac->init_machine = kvm_init;
     ac->has_memory = kvm_accel_has_memory;
     ac->allowed = &kvm_allowed;
+
+    object_class_property_add(oc, "kvm-shadow-mem", "int",
+        kvm_get_kvm_shadow_mem, kvm_set_kvm_shadow_mem,
+        NULL, NULL, &error_abort);
+    object_class_property_set_description(oc, "kvm-shadow-mem",
+        "KVM shadow MMU size", &error_abort);
 }
 
 static const TypeInfo kvm_accel_type = {
     .name = TYPE_KVM_ACCEL,
     .parent = TYPE_ACCEL,
+    .instance_init = kvm_accel_instance_init,
     .class_init = kvm_accel_class_init,
     .instance_size = sizeof(KVMState),
 };