libxc: Wrapper functions for cpu online/offline

Signed-off-by: Shan Haitao <haitao.shan@intel.com>

tools/libxc/Makefile

@@ -19,6 +19,7 @@ CTRL_SRCS-y       += xc_sedf.c
 CTRL_SRCS-y       += xc_csched.c
 CTRL_SRCS-y       += xc_tbuf.c
 CTRL_SRCS-y       += xc_pm.c
+CTRL_SRCS-y       += xc_cpu_hotplug.c
 CTRL_SRCS-y       += xc_resume.c
 CTRL_SRCS-$(CONFIG_X86) += xc_pagetab.c
 CTRL_SRCS-$(CONFIG_Linux) += xc_linux.c

tools/libxc/xc_cpu_hotplug.c

@@ -0,0 +1,53 @@
+/******************************************************************************
+ * xc_cpu_hotplug.c - Libxc API for Xen Physical CPU hotplug Management
+ *
+ * Copyright (c) 2008, Shan Haitao <haitao.shan@intel.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "xc_private.h"
+
+int xc_cpu_online(int xc_handle, int cpu)
+{
+    DECLARE_SYSCTL;
+    int ret;
+
+    sysctl.cmd = XEN_SYSCTL_cpu_hotplug;
+    sysctl.u.cpu_hotplug.cpu = cpu;
+    sysctl.u.cpu_hotplug.op = XEN_SYSCTL_CPU_HOTPLUG_ONLINE;
+    ret = xc_sysctl(xc_handle, &sysctl);
+
+    return ret;
+}
+
+int xc_cpu_offline(int xc_handle, int cpu)
+{
+    DECLARE_SYSCTL;
+    int ret;
+
+    sysctl.cmd = XEN_SYSCTL_cpu_hotplug;
+    sysctl.u.cpu_hotplug.cpu = cpu;
+    sysctl.u.cpu_hotplug.op = XEN_SYSCTL_CPU_HOTPLUG_OFFLINE;
+    ret = xc_sysctl(xc_handle, &sysctl);
+
+    return ret;
+}
+

tools/libxc/xenctrl.h

@@ -1156,4 +1156,6 @@ int xc_pm_get_max_cx(int xc_handle, int cpuid, int *max_cx);
 int xc_pm_get_cxstat(int xc_handle, int cpuid, struct xc_cx_stat *cxpt);
 int xc_pm_reset_cxstat(int xc_handle, int cpuid);
 
+int xc_cpu_online(int xc_handle, int cpu);
+int xc_cpu_offline(int xc_handle, int cpu);
 #endif /* XENCTRL_H */