Jiang, Yunhong
2009-May-31 10:06 UTC
[Xen-devel] [PATCH] export page offline hypercall in libxc
Export page offline hypercalls to user space tools.
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
diff -r 780041c4a96d tools/libxc/Makefile
--- a/tools/libxc/Makefile Tue May 19 02:23:32 2009 +0100
+++ b/tools/libxc/Makefile Tue May 19 03:14:30 2009 +0800
@@ -31,6 +31,7 @@ GUEST_SRCS-y : 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 -r 780041c4a96d tools/libxc/xc_offline_page.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/libxc/xc_offline_page.c Tue May 19 02:57:37 2009 +0800
@@ -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 -r 780041c4a96d tools/libxc/xenguest.h
--- a/tools/libxc/xenguest.h Tue May 19 02:23:32 2009 +0100
+++ b/tools/libxc/xenguest.h Tue May 19 03:13:59 2009 +0800
@@ -148,4 +148,13 @@ int xc_suspend_evtchn_init(int xc, int x
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 */
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