[Qemu-devel] [PATCH V7 05/15] xen: Add initialisation of Xen

[anthony.perard@citrix.com]

From: Anthony PERARD <anthony.perard@citrix.com>

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
---
 Makefile.target |    5 +++++
 hw/xen.h        |   13 +++++++++++++
 vl.c            |    2 ++
 xen-all.c       |   29 +++++++++++++++++++++++++++++
 xen-stub.c      |   17 +++++++++++++++++
 5 files changed, 66 insertions(+), 0 deletions(-)
 create mode 100644 xen-all.c
 create mode 100644 xen-stub.c

diff --git a/Makefile.target b/Makefile.target
index ce8aa76..526a225 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -2,6 +2,7 @@
 
 GENERATED_HEADERS = config-target.h
 CONFIG_NO_KVM = $(if $(subst n,,$(CONFIG_KVM)),n,y)
+CONFIG_NO_XEN = $(if $(subst n,,$(CONFIG_XEN)),n,y)
 
 include ../config-host.mak
 include config-devices.mak
@@ -207,6 +208,10 @@ QEMU_CFLAGS += $(VNC_PNG_CFLAGS)
 obj-$(CONFIG_XEN) += xen_machine_pv.o xen_domainbuild.o
 obj-$(CONFIG_XEN) += xen_interfaces.o
 
+# xen support
+obj-$(CONFIG_XEN) += xen-all.o
+obj-$(CONFIG_NO_XEN) += xen-stub.o
+
 # xen full virtualized machine
 obj-i386-$(CONFIG_XEN) += xen_machine_fv.o
 
diff --git a/hw/xen.h b/hw/xen.h
index 780dcf7..183cbb5 100644
--- a/hw/xen.h
+++ b/hw/xen.h
@@ -18,4 +18,17 @@ enum xen_mode {
 extern uint32_t xen_domid;
 extern enum xen_mode xen_mode;
 
+extern int xen_allowed;
+
+static inline int xen_enabled(void)
+{
+#ifdef CONFIG_XEN
+    return xen_allowed;
+#else
+    return 0;
+#endif
+}
+
+int xen_init(int smp_cpus);
+
 #endif /* QEMU_HW_XEN_H */
diff --git a/vl.c b/vl.c
index 04e480c..955e579 100644
--- a/vl.c
+++ b/vl.c
@@ -245,6 +245,7 @@ static NotifierList exit_notifiers =
 
 static int tcg_allowed = 1;
 int kvm_allowed = 0;
+int xen_allowed = 0;
 uint32_t xen_domid;
 enum xen_mode xen_mode = XEN_EMULATE;
 
@@ -1741,6 +1742,7 @@ static struct {
     int *allowed;
 } accel_list[] = {
     { "tcg", "tcg", tcg_available, tcg_init, &tcg_allowed },
+    { "xen", "Xen", xen_available, xen_init, &xen_allowed },
     { "kvm", "KVM", kvm_available, kvm_init, &kvm_allowed },
 };
 
diff --git a/xen-all.c b/xen-all.c
new file mode 100644
index 0000000..29c8002
--- /dev/null
+++ b/xen-all.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2010       Citrix Ltd.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "config.h"
+
+#include "hw/xen_common.h"
+#include "hw/xen_backend.h"
+#include "hw/xen_redirect.h"
+
+/* Initialise Xen */
+
+int xen_init(int smp_cpus)
+{
+    if (xen_mode == XEN_EMULATE)
+        xen_mode = XEN_ATTACH;
+    xen_interfaces_init();
+    xen_xc = xc_interface_open(0, 0, 0);
+    if (xen_xc == XC_HANDLER_INITIAL_VALUE) {
+        xen_be_printf(NULL, 0, "can't open xen interface\n");
+        return -1;
+    }
+
+    return 0;
+}
diff --git a/xen-stub.c b/xen-stub.c
new file mode 100644
index 0000000..0fa9c51
--- /dev/null
+++ b/xen-stub.c
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2010       Citrix Ltd.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "config.h"
+
+#include "qemu-common.h"
+#include "hw/xen.h"
+
+int xen_init(int smp_cpus)
+{
+    return -ENOSYS;
+}
-- 
1.7.1