From 79cda3bac992055caa1ebe331155f974fe59125b Mon Sep 17 00:00:00 2001
From: Keir Fraser <keir.fraser@citrix.com>
Date: Mon, 1 Jun 2009 14:08:58 +0100
Subject: [PATCH] Export page offline hypercalls to user space tools.

Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
---
 tools/libxc/Makefile          |   1 +
 tools/libxc/xc_offline_page.c | 100 ++++++++++++++++++++++++++++++++++
 tools/libxc/xenguest.h        |   9 +++
 3 files changed, 110 insertions(+)
 create mode 100644 tools/libxc/xc_offline_page.c

diff --git a/tools/libxc/Makefile b/tools/libxc/Makefile
index e984df9088..95e51ac58d 100644
--- a/tools/libxc/Makefile
+++ b/tools/libxc/Makefile
@@ -32,6 +32,7 @@ CTRL_SRCS-$(CONFIG_MiniOS) += xc_minios.c
 GUEST_SRCS-y :=
 GUEST_SRCS-y += xg_private.c xc_suspend.c
 GUEST_SRCS-$(CONFIG_MIGRATE) += xc_domain_restore.c xc_domain_save.c
+GUEST_SRCS-y += xc_offline_page.c
 GUEST_SRCS-$(CONFIG_HVM) += xc_hvm_build.c
 
 vpath %.c ../../xen/common/libelf
diff --git a/tools/libxc/xc_offline_page.c b/tools/libxc/xc_offline_page.c
new file mode 100644
index 0000000000..5561f5c96f
--- /dev/null
+++ b/tools/libxc/xc_offline_page.c
@@ -0,0 +1,100 @@
+/******************************************************************************
+ * xc_offline_page.c
+ *
+ * Helper functions to offline/online one page
+ *
+ * Copyright (c) 2003, K A Fraser.
+ * Copyright (c) 2009, Intel Corporation.
+ */
+
+#include <inttypes.h>
+#include <time.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+#include "xc_private.h"
+#include "xc_dom.h"
+#include "xg_private.h"
+#include "xg_save_restore.h"
+
+int xc_mark_page_online(int xc, unsigned long start,
+                        unsigned long end, uint32_t *status)
+{
+    DECLARE_SYSCTL;
+    int ret = -1;
+
+    if ( !status || (end < start) )
+        return -EINVAL;
+
+    if (lock_pages(status, sizeof(uint32_t)*(end - start + 1)))
+    {
+        ERROR("Could not lock memory for xc_mark_page_online\n");
+        return -EINVAL;
+    }
+
+    sysctl.cmd = XEN_SYSCTL_page_offline_op;
+    sysctl.u.page_offline.start = start;
+    sysctl.u.page_offline.cmd = sysctl_page_online;
+    sysctl.u.page_offline.end = end;
+    set_xen_guest_handle(sysctl.u.page_offline.status, status);
+    ret = xc_sysctl(xc, &sysctl);
+
+    unlock_pages(status, sizeof(uint32_t)*(end - start + 1));
+
+    return ret;
+}
+
+int xc_mark_page_offline(int xc, unsigned long start,
+                          unsigned long end, uint32_t *status)
+{
+    DECLARE_SYSCTL;
+    int ret = -1;
+
+    if ( !status || (end < start) )
+        return -EINVAL;
+
+    if (lock_pages(status, sizeof(uint32_t)*(end - start + 1)))
+    {
+        ERROR("Could not lock memory for xc_mark_page_offline");
+        return -EINVAL;
+    }
+
+    sysctl.cmd = XEN_SYSCTL_page_offline_op;
+    sysctl.u.page_offline.start = start;
+    sysctl.u.page_offline.cmd = sysctl_page_offline;
+    sysctl.u.page_offline.end = end;
+    set_xen_guest_handle(sysctl.u.page_offline.status, status);
+    ret = xc_sysctl(xc, &sysctl);
+
+    unlock_pages(status, sizeof(uint32_t)*(end - start + 1));
+
+    return ret;
+}
+
+int xc_query_page_offline_status(int xc, unsigned long start,
+                                 unsigned long end, uint32_t *status)
+{
+    DECLARE_SYSCTL;
+    int ret = -1;
+
+    if ( !status || (end < start) )
+        return -EINVAL;
+
+    if (lock_pages(status, sizeof(uint32_t)*(end - start + 1)))
+    {
+        ERROR("Could not lock memory for xc_query_page_offline_status\n");
+        return -EINVAL;
+    }
+
+    sysctl.cmd = XEN_SYSCTL_page_offline_op;
+    sysctl.u.page_offline.start = start;
+    sysctl.u.page_offline.cmd = sysctl_query_page_offline;
+    sysctl.u.page_offline.end = end;
+    set_xen_guest_handle(sysctl.u.page_offline.status, status);
+    ret = xc_sysctl(xc, &sysctl);
+
+    unlock_pages(status, sizeof(uint32_t)*(end - start + 1));
+
+    return ret;
+}
diff --git a/tools/libxc/xenguest.h b/tools/libxc/xenguest.h
index e8ebeb1ca2..32de5bdd93 100644
--- a/tools/libxc/xenguest.h
+++ b/tools/libxc/xenguest.h
@@ -154,4 +154,13 @@ int xc_suspend_evtchn_init(int xc, int xce, int domid, int port);
 
 int xc_await_suspend(int xce, int suspend_evtchn);
 
+int xc_mark_page_online(int xc, unsigned long start,
+                        unsigned long end, uint32_t *status);
+
+int xc_mark_page_offline(int xc, unsigned long start,
+                          unsigned long end, uint32_t *status);
+
+int xc_query_page_offline_status(int xc, unsigned long start,
+                                 unsigned long end, uint32_t *status);
+
 #endif /* XENGUEST_H */
-- 
2.39.5