[Qemu-devel] [PATCH RFC V4 05/14] xen: Add xen in -accel option.

[anthony.perard@citrix.com]

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

This come with the initialisation of Xen.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
---
 Makefile.target |    5 +++++
 hw/xen.h        |   10 ++++++++++
 vl.c            |    2 ++
 xen-all.c       |   25 +++++++++++++++++++++++++
 xen-stub.c      |   17 +++++++++++++++++
 5 files changed, 59 insertions(+), 0 deletions(-)
 create mode 100644 xen-all.c
 create mode 100644 xen-stub.c

diff --git a/Makefile.target b/Makefile.target
index 7adbc20..7a5eb71 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
@@ -183,6 +184,10 @@ QEMU_CFLAGS += $(VNC_PNG_CFLAGS)
 # xen backend driver support
 obj-$(CONFIG_XEN) += xen_machine_pv.o xen_domainbuild.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..14bbb6e 100644
--- a/hw/xen.h
+++ b/hw/xen.h
@@ -18,4 +18,14 @@ enum xen_mode {
 extern uint32_t xen_domid;
 extern enum xen_mode xen_mode;
 
+extern int xen_allowed;
+
+#if defined CONFIG_XEN
+#define xen_enabled() (xen_allowed)
+#else
+#define xen_enabled() (0)
+#endif
+
+int xen_init(int smp_cpus);
+
 #endif /* QEMU_HW_XEN_H */
diff --git a/vl.c b/vl.c
index 797f04d..c0c9d32 100644
--- a/vl.c
+++ b/vl.c
@@ -243,6 +243,7 @@ static NotifierList exit_notifiers =
     NOTIFIER_LIST_INITIALIZER(exit_notifiers);
 
 int kvm_allowed = 0;
+int xen_allowed = 0;
 uint32_t xen_domid;
 enum xen_mode xen_mode = XEN_EMULATE;
 
@@ -1755,6 +1756,7 @@ static struct {
     int *allowed;
 } accel_list[] = {
     { "tcg", "tcg", NULL, NULL, NULL },
+    { "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..42c93ba
--- /dev/null
+++ b/xen-all.c
@@ -0,0 +1,25 @@
+/*
+ * 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"
+
+/* Initialise Xen */
+
+int xen_init(int smp_cpus)
+{
+    xen_xc = xc_interface_open(NULL, NULL, 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;
+}
-- 
1.6.5