1 files changed, 95 insertions, 0 deletions
diff --git a/hw/xen/xen_apic.c b/hw/xen/xen_apic.c
new file mode 100644
index 0000000000..a2eb8a159a
--- /dev/null
+++ b/hw/xen/xen_apic.c
@@ -0,0 +1,95 @@
+/*
+ * Xen basic APIC support
+ *
+ * Copyright (c) 2012 Citrix
+ *
+ * Authors:
+ *  Wei Liu <wei.liu2@citrix.com>
+ *
+ * This work is licensed under the terms of the GNU GPL version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+#include "hw/i386/apic_internal.h"
+#include "hw/pci/msi.h"
+#include "hw/xen/xen.h"
+
+static uint64_t xen_apic_mem_read(void *opaque, hwaddr addr,
+                                  unsigned size)
+{
+    return ~(uint64_t)0;
+}
+
+static void xen_apic_mem_write(void *opaque, hwaddr addr,
+                               uint64_t data, unsigned size)
+{
+    if (size != sizeof(uint32_t)) {
+        fprintf(stderr, "Xen: APIC write data size = %d, invalid\n", size);
+        return;
+    }
+
+    xen_hvm_inject_msi(addr, data);
+}
+
+static const MemoryRegionOps xen_apic_io_ops = {
+    .read = xen_apic_mem_read,
+    .write = xen_apic_mem_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void xen_apic_init(APICCommonState *s)
+{
+    memory_region_init_io(&s->io_memory, &xen_apic_io_ops, s, "xen-apic-msi",
+                          MSI_SPACE_SIZE);
+
+#if defined(CONFIG_XEN_CTRL_INTERFACE_VERSION) \
+    && CONFIG_XEN_CTRL_INTERFACE_VERSION >= 420
+    msi_supported = true;
+#endif
+}
+
+static void xen_apic_set_base(APICCommonState *s, uint64_t val)
+{
+}
+
+static void xen_apic_set_tpr(APICCommonState *s, uint8_t val)
+{
+}
+
+static uint8_t xen_apic_get_tpr(APICCommonState *s)
+{
+    return 0;
+}
+
+static void xen_apic_vapic_base_update(APICCommonState *s)
+{
+}
+
+static void xen_apic_external_nmi(APICCommonState *s)
+{
+}
+
+static void xen_apic_class_init(ObjectClass *klass, void *data)
+{
+    APICCommonClass *k = APIC_COMMON_CLASS(klass);
+
+    k->init = xen_apic_init;
+    k->set_base = xen_apic_set_base;
+    k->set_tpr = xen_apic_set_tpr;
+    k->get_tpr = xen_apic_get_tpr;
+    k->vapic_base_update = xen_apic_vapic_base_update;
+    k->external_nmi = xen_apic_external_nmi;
+}
+
+static const TypeInfo xen_apic_info = {
+    .name = "xen-apic",
+    .parent = TYPE_APIC_COMMON,
+    .instance_size = sizeof(APICCommonState),
+    .class_init = xen_apic_class_init,
+};
+
+static void xen_apic_register_types(void)
+{
+    type_register_static(&xen_apic_info);
+}
+
+type_init(xen_apic_register_types)