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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v20210701 07/40] tools: create libxensaverestore
Move all save/restore related code from libxenguest.so into a separate
library libxensaverestore.so. The only consumer is libxl-save-helper.
There is no need to have the moved code mapped all the time in binaries
where libxenguest.so is used.
According to size(1) the change is:
text data bss dec hex filename
187183 4304 48 191535 2ec2f guest/libxenguest.so.4.15.0
124106 3376 48 127530 1f22a guest/libxenguest.so.4.15.0
67841 1872 8 69721 11059 saverestore/libxensaverestore.so.4.15.0
While touching the files anyway, take the opportunity to drop the
redundant xg_sr_ filename prefix.
Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
Acked-by: Wei Liu <wl@xxxxxxx>
v6:
- fix build of nomigrate.c
v5:
- fix spelling in description
v4:
- drop xg_ prefix from filenames (jgross)
- drop sr_ prefix from filenames (jbeulich)
v3:
- repost in time for 4.16
v2:
- copy also license header
- move xg_nomigrate.c
- add size(1) output to commit msg
- remove change from libxl_create.c
---
.gitignore | 2 +
tools/include/xenguest.h | 186 ----------------
tools/include/xensaverestore.h | 208 ++++++++++++++++++
tools/libs/Makefile | 1 +
tools/libs/guest/Makefile | 11 -
tools/libs/guest/xg_offline_page.c | 1 -
tools/libs/light/Makefile | 4 +-
tools/libs/light/libxl_internal.h | 1 +
tools/libs/light/libxl_save_helper.c | 1 +
tools/libs/light/libxl_save_msgs_gen.pl | 2 +-
tools/libs/saverestore/Makefile | 38 ++++
.../xg_sr_common.c => saverestore/common.c} | 2 +-
.../xg_sr_common.h => saverestore/common.h} | 16 +-
.../common_x86.c} | 2 +-
.../common_x86.h} | 2 +-
.../common_x86_pv.c} | 2 +-
.../common_x86_pv.h} | 2 +-
.../nomigrate.c} | 2 +-
.../xg_sr_restore.c => saverestore/restore.c} | 2 +-
.../restore_x86_hvm.c} | 2 +-
.../restore_x86_pv.c} | 2 +-
.../xg_sr_save.c => saverestore/save.c} | 2 +-
.../save_restore.h} | 2 -
.../save_x86_hvm.c} | 2 +-
.../save_x86_pv.c} | 2 +-
.../stream_format.h} | 0
tools/libs/uselibs.mk | 4 +-
27 files changed, 283 insertions(+), 218 deletions(-)
create mode 100644 tools/include/xensaverestore.h
create mode 100644 tools/libs/saverestore/Makefile
rename tools/libs/{guest/xg_sr_common.c => saverestore/common.c} (99%)
rename tools/libs/{guest/xg_sr_common.h => saverestore/common.h} (98%)
rename tools/libs/{guest/xg_sr_common_x86.c => saverestore/common_x86.c} (99%)
rename tools/libs/{guest/xg_sr_common_x86.h => saverestore/common_x86.h} (98%)
rename tools/libs/{guest/xg_sr_common_x86_pv.c => saverestore/common_x86_pv.c}
(99%)
rename tools/libs/{guest/xg_sr_common_x86_pv.h => saverestore/common_x86_pv.h}
(98%)
rename tools/libs/{guest/xg_nomigrate.c => saverestore/nomigrate.c} (98%)
rename tools/libs/{guest/xg_sr_restore.c => saverestore/restore.c} (99%)
rename tools/libs/{guest/xg_sr_restore_x86_hvm.c =>
saverestore/restore_x86_hvm.c} (99%)
rename tools/libs/{guest/xg_sr_restore_x86_pv.c =>
saverestore/restore_x86_pv.c} (99%)
rename tools/libs/{guest/xg_sr_save.c => saverestore/save.c} (99%)
rename tools/libs/{guest/xg_save_restore.h => saverestore/save_restore.h} (98%)
rename tools/libs/{guest/xg_sr_save_x86_hvm.c => saverestore/save_x86_hvm.c}
(99%)
rename tools/libs/{guest/xg_sr_save_x86_pv.c => saverestore/save_x86_pv.c}
(99%)
rename tools/libs/{guest/xg_sr_stream_format.h => saverestore/stream_format.h}
(100%)
diff --git a/.gitignore b/.gitignore
index 38a085e398..08a321e995 100644
--- a/.gitignore
+++ b/.gitignore
@@ -147,6 +147,8 @@ tools/libs/light/test_timedereg
tools/libs/light/test_fdderegrace
tools/libs/light/tmp.*
tools/libs/light/xenlight.pc
+tools/libs/saverestore/libxensaverestore.map
+tools/libs/saverestore/xensaverestore.pc
tools/libs/stat/_paths.h
tools/libs/stat/headers.chk
tools/libs/stat/libxenstat.map
diff --git a/tools/include/xenguest.h b/tools/include/xenguest.h
index 61d0a82f48..7417675b3b 100644
--- a/tools/include/xenguest.h
+++ b/tools/include/xenguest.h
@@ -24,9 +24,6 @@
#define XC_NUMA_NO_NODE (~0U)
-#define XCFLAGS_LIVE (1 << 0)
-#define XCFLAGS_DEBUG (1 << 1)
-
#define X86_64_B_SIZE 64
#define X86_32_B_SIZE 32
@@ -433,189 +430,6 @@ static inline xen_pfn_t xc_dom_p2m(struct xc_dom_image
*dom, xen_pfn_t pfn)
*/
struct xenevtchn_handle;
-/* For save's precopy_policy(). */
-struct precopy_stats
-{
- unsigned int iteration;
- unsigned long total_written;
- long dirty_count; /* -1 if unknown */
-};
-
-/*
- * A precopy_policy callback may not be running in the same address
- * space as libxc an so precopy_stats is passed by value.
- */
-typedef int (*precopy_policy_t)(struct precopy_stats, void *);
-
-/* callbacks provided by xc_domain_save */
-struct save_callbacks {
- /*
- * Called after expiration of checkpoint interval,
- * to suspend the guest.
- */
- int (*suspend)(void *data);
-
- /*
- * Called before and after every batch of page data sent during
- * the precopy phase of a live migration to ask the caller what
- * to do next based on the current state of the precopy migration.
- *
- * Should return one of the values listed below:
- */
-#define XGS_POLICY_ABORT (-1) /* Abandon the migration entirely
- * and tidy up. */
-#define XGS_POLICY_CONTINUE_PRECOPY 0 /* Remain in the precopy phase. */
-#define XGS_POLICY_STOP_AND_COPY 1 /* Immediately suspend and transmit the
- * remaining dirty pages. */
- precopy_policy_t precopy_policy;
-
- /*
- * Called after the guest's dirty pages have been
- * copied into an output buffer.
- * Callback function resumes the guest & the device model,
- * returns to xc_domain_save.
- * xc_domain_save then flushes the output buffer, while the
- * guest continues to run.
- */
- int (*postcopy)(void *data);
-
- /*
- * Called after the memory checkpoint has been flushed
- * out into the network. Typical actions performed in this
- * callback include:
- * (a) send the saved device model state (for HVM guests),
- * (b) wait for checkpoint ack
- * (c) release the network output buffer pertaining to the acked
checkpoint.
- * (c) sleep for the checkpoint interval.
- *
- * returns:
- * 0: terminate checkpointing gracefully
- * 1: take another checkpoint
- */
- int (*checkpoint)(void *data);
-
- /*
- * Called after the checkpoint callback.
- *
- * returns:
- * 0: terminate checkpointing gracefully
- * 1: take another checkpoint
- */
- int (*wait_checkpoint)(void *data);
-
- /* Enable qemu-dm logging dirty pages to xen */
- int (*switch_qemu_logdirty)(uint32_t domid, unsigned enable, void *data);
/* HVM only */
-
- /* to be provided as the last argument to each callback function */
- void *data;
-};
-
-/* Type of stream. Plain, or using a continuous replication protocol? */
-typedef enum {
- XC_STREAM_PLAIN,
- XC_STREAM_REMUS,
- XC_STREAM_COLO,
-} xc_stream_type_t;
-
-/**
- * This function will save a running domain.
- *
- * @param xch a handle to an open hypervisor interface
- * @param io_fd the file descriptor to save a domain to
- * @param dom the id of the domain
- * @param flags XCFLAGS_xxx
- * @param stream_type XC_STREAM_PLAIN if the far end of the stream
- * doesn't use checkpointing
- * @param recv_fd Only used for XC_STREAM_COLO. Contains backchannel from
- * the destination side.
- * @return 0 on success, -1 on failure
- */
-int xc_domain_save(xc_interface *xch, int io_fd, uint32_t dom,
- uint32_t flags, struct save_callbacks *callbacks,
- xc_stream_type_t stream_type, int recv_fd);
-
-/* callbacks provided by xc_domain_restore */
-struct restore_callbacks {
- /*
- * Called once the STATIC_DATA_END record has been received/inferred.
- *
- * For compatibility with older streams, provides a list of static data
- * expected to be found in the stream, which was missing. A higher level
- * toolstack is responsible for providing any necessary compatibiltiy.
- */
-#define XGR_SDD_MISSING_CPUID (1 << 0)
-#define XGR_SDD_MISSING_MSR (1 << 1)
- int (*static_data_done)(unsigned int missing, void *data);
-
- /* Called after a new checkpoint to suspend the guest. */
- int (*suspend)(void *data);
-
- /*
- * Called after the secondary vm is ready to resume.
- * Callback function resumes the guest & the device model,
- * returns to xc_domain_restore.
- */
- int (*postcopy)(void *data);
-
- /*
- * A checkpoint record has been found in the stream.
- * returns:
- */
-#define XGR_CHECKPOINT_ERROR 0 /* Terminate processing */
-#define XGR_CHECKPOINT_SUCCESS 1 /* Continue reading more data from the
stream */
-#define XGR_CHECKPOINT_FAILOVER 2 /* Failover and resume VM */
- int (*checkpoint)(void *data);
-
- /*
- * Called after the checkpoint callback.
- *
- * returns:
- * 0: terminate checkpointing gracefully
- * 1: take another checkpoint
- */
- int (*wait_checkpoint)(void *data);
-
- /*
- * callback to send store gfn and console gfn to xl
- * if we want to resume vm before xc_domain_save()
- * exits.
- */
- void (*restore_results)(xen_pfn_t store_gfn, xen_pfn_t console_gfn,
- void *data);
-
- /* to be provided as the last argument to each callback function */
- void *data;
-};
-
-/**
- * This function will restore a saved domain.
- *
- * Domain is restored in a suspended state ready to be unpaused.
- *
- * @param xch a handle to an open hypervisor interface
- * @param io_fd the file descriptor to restore a domain from
- * @param dom the id of the domain
- * @param store_evtchn the xenstore event channel for this domain to use
- * @param store_mfn filled with the gfn of the store page
- * @param store_domid the backend domain for xenstore
- * @param console_evtchn the console event channel for this domain to use
- * @param console_mfn filled with the gfn of the console page
- * @param console_domid the backend domain for xenconsole
- * @param stream_type XC_STREAM_PLAIN if the far end of the stream is using
- * checkpointing
- * @param callbacks non-NULL to receive a callback to restore toolstack
- * specific data
- * @param send_back_fd Only used for XC_STREAM_COLO. Contains backchannel to
- * the source side.
- * @return 0 on success, -1 on failure
- */
-int xc_domain_restore(xc_interface *xch, int io_fd, uint32_t dom,
- unsigned int store_evtchn, unsigned long *store_mfn,
- uint32_t store_domid, unsigned int console_evtchn,
- unsigned long *console_mfn, uint32_t console_domid,
- xc_stream_type_t stream_type,
- struct restore_callbacks *callbacks, int send_back_fd);
-
/**
* This function will create a domain for a paravirtualized Linux
* using file names pointing to kernel and ramdisk
diff --git a/tools/include/xensaverestore.h b/tools/include/xensaverestore.h
new file mode 100644
index 0000000000..0410f0469e
--- /dev/null
+++ b/tools/include/xensaverestore.h
@@ -0,0 +1,208 @@
+/******************************************************************************
+ * A library for guest domain save/restore/migration in Xen.
+ *
+ * Copyright (c) 2003-2004, K A Fraser.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef XENSAVERESTORE_H
+#define XENSAVERESTORE_H
+
+#define XCFLAGS_LIVE (1 << 0)
+#define XCFLAGS_DEBUG (1 << 1)
+
+/* For save's precopy_policy(). */
+struct precopy_stats
+{
+ unsigned int iteration;
+ unsigned long total_written;
+ long dirty_count; /* -1 if unknown */
+};
+
+/*
+ * A precopy_policy callback may not be running in the same address
+ * space as libxc an so precopy_stats is passed by value.
+ */
+typedef int (*precopy_policy_t)(struct precopy_stats, void *);
+
+/* callbacks provided by xc_domain_save */
+struct save_callbacks {
+ /*
+ * Called after expiration of checkpoint interval,
+ * to suspend the guest.
+ */
+ int (*suspend)(void *data);
+
+ /*
+ * Called before and after every batch of page data sent during
+ * the precopy phase of a live migration to ask the caller what
+ * to do next based on the current state of the precopy migration.
+ *
+ * Should return one of the values listed below:
+ */
+#define XGS_POLICY_ABORT (-1) /* Abandon the migration entirely
+ * and tidy up. */
+#define XGS_POLICY_CONTINUE_PRECOPY 0 /* Remain in the precopy phase. */
+#define XGS_POLICY_STOP_AND_COPY 1 /* Immediately suspend and transmit the
+ * remaining dirty pages. */
+ precopy_policy_t precopy_policy;
+
+ /*
+ * Called after the guest's dirty pages have been
+ * copied into an output buffer.
+ * Callback function resumes the guest & the device model,
+ * returns to xc_domain_save.
+ * xc_domain_save then flushes the output buffer, while the
+ * guest continues to run.
+ */
+ int (*postcopy)(void *data);
+
+ /*
+ * Called after the memory checkpoint has been flushed
+ * out into the network. Typical actions performed in this
+ * callback include:
+ * (a) send the saved device model state (for HVM guests),
+ * (b) wait for checkpoint ack
+ * (c) release the network output buffer pertaining to the acked
checkpoint.
+ * (c) sleep for the checkpoint interval.
+ *
+ * returns:
+ * 0: terminate checkpointing gracefully
+ * 1: take another checkpoint
+ */
+ int (*checkpoint)(void *data);
+
+ /*
+ * Called after the checkpoint callback.
+ *
+ * returns:
+ * 0: terminate checkpointing gracefully
+ * 1: take another checkpoint
+ */
+ int (*wait_checkpoint)(void *data);
+
+ /* Enable qemu-dm logging dirty pages to xen */
+ int (*switch_qemu_logdirty)(uint32_t domid, unsigned enable, void *data);
/* HVM only */
+
+ /* to be provided as the last argument to each callback function */
+ void *data;
+};
+
+/* Type of stream. Plain, or using a continuous replication protocol? */
+typedef enum {
+ XC_STREAM_PLAIN,
+ XC_STREAM_REMUS,
+ XC_STREAM_COLO,
+} xc_stream_type_t;
+
+/**
+ * This function will save a running domain.
+ *
+ * @param xch a handle to an open hypervisor interface
+ * @param io_fd the file descriptor to save a domain to
+ * @param dom the id of the domain
+ * @param flags XCFLAGS_xxx
+ * @param stream_type XC_STREAM_PLAIN if the far end of the stream
+ * doesn't use checkpointing
+ * @param recv_fd Only used for XC_STREAM_COLO. Contains backchannel from
+ * the destination side.
+ * @return 0 on success, -1 on failure
+ */
+int xc_domain_save(xc_interface *xch, int io_fd, uint32_t dom,
+ uint32_t flags, struct save_callbacks *callbacks,
+ xc_stream_type_t stream_type, int recv_fd);
+
+/* callbacks provided by xc_domain_restore */
+struct restore_callbacks {
+ /*
+ * Called once the STATIC_DATA_END record has been received/inferred.
+ *
+ * For compatibility with older streams, provides a list of static data
+ * expected to be found in the stream, which was missing. A higher level
+ * toolstack is responsible for providing any necessary compatibiltiy.
+ */
+#define XGR_SDD_MISSING_CPUID (1 << 0)
+#define XGR_SDD_MISSING_MSR (1 << 1)
+ int (*static_data_done)(unsigned int missing, void *data);
+
+ /* Called after a new checkpoint to suspend the guest. */
+ int (*suspend)(void *data);
+
+ /*
+ * Called after the secondary vm is ready to resume.
+ * Callback function resumes the guest & the device model,
+ * returns to xc_domain_restore.
+ */
+ int (*postcopy)(void *data);
+
+ /*
+ * A checkpoint record has been found in the stream.
+ * returns:
+ */
+#define XGR_CHECKPOINT_ERROR 0 /* Terminate processing */
+#define XGR_CHECKPOINT_SUCCESS 1 /* Continue reading more data from the
stream */
+#define XGR_CHECKPOINT_FAILOVER 2 /* Failover and resume VM */
+ int (*checkpoint)(void *data);
+
+ /*
+ * Called after the checkpoint callback.
+ *
+ * returns:
+ * 0: terminate checkpointing gracefully
+ * 1: take another checkpoint
+ */
+ int (*wait_checkpoint)(void *data);
+
+ /*
+ * callback to send store gfn and console gfn to xl
+ * if we want to resume vm before xc_domain_save()
+ * exits.
+ */
+ void (*restore_results)(xen_pfn_t store_gfn, xen_pfn_t console_gfn,
+ void *data);
+
+ /* to be provided as the last argument to each callback function */
+ void *data;
+};
+
+/**
+ * This function will restore a saved domain.
+ *
+ * Domain is restored in a suspended state ready to be unpaused.
+ *
+ * @param xch a handle to an open hypervisor interface
+ * @param io_fd the file descriptor to restore a domain from
+ * @param dom the id of the domain
+ * @param store_evtchn the xenstore event channel for this domain to use
+ * @param store_mfn filled with the gfn of the store page
+ * @param store_domid the backend domain for xenstore
+ * @param console_evtchn the console event channel for this domain to use
+ * @param console_mfn filled with the gfn of the console page
+ * @param console_domid the backend domain for xenconsole
+ * @param stream_type XC_STREAM_PLAIN if the far end of the stream is using
+ * checkpointing
+ * @param callbacks non-NULL to receive a callback to restore toolstack
+ * specific data
+ * @param send_back_fd Only used for XC_STREAM_COLO. Contains backchannel to
+ * the source side.
+ * @return 0 on success, -1 on failure
+ */
+int xc_domain_restore(xc_interface *xch, int io_fd, uint32_t dom,
+ unsigned int store_evtchn, unsigned long *store_mfn,
+ uint32_t store_domid, unsigned int console_evtchn,
+ unsigned long *console_mfn, uint32_t console_domid,
+ xc_stream_type_t stream_type,
+ struct restore_callbacks *callbacks, int send_back_fd);
+
+#endif /* XENSAVERESTORE_H */
diff --git a/tools/libs/Makefile b/tools/libs/Makefile
index 1afcd12e2b..ca43c66777 100644
--- a/tools/libs/Makefile
+++ b/tools/libs/Makefile
@@ -12,6 +12,7 @@ SUBDIRS-y += devicemodel
SUBDIRS-y += ctrl
SUBDIRS-y += guest
SUBDIRS-y += hypfs
+SUBDIRS-y += saverestore
SUBDIRS-y += store
SUBDIRS-y += stat
SUBDIRS-$(CONFIG_Linux) += vchan
diff --git a/tools/libs/guest/Makefile b/tools/libs/guest/Makefile
index 2ce92d247e..4cf5459bb1 100644
--- a/tools/libs/guest/Makefile
+++ b/tools/libs/guest/Makefile
@@ -11,18 +11,7 @@ SRCS-y += xg_domain.c
SRCS-y += xg_suspend.c
SRCS-y += xg_resume.c
ifeq ($(CONFIG_MIGRATE),y)
-SRCS-y += xg_sr_common.c
-SRCS-$(CONFIG_X86) += xg_sr_common_x86.c
-SRCS-$(CONFIG_X86) += xg_sr_common_x86_pv.c
-SRCS-$(CONFIG_X86) += xg_sr_restore_x86_pv.c
-SRCS-$(CONFIG_X86) += xg_sr_restore_x86_hvm.c
-SRCS-$(CONFIG_X86) += xg_sr_save_x86_pv.c
-SRCS-$(CONFIG_X86) += xg_sr_save_x86_hvm.c
-SRCS-y += xg_sr_restore.c
-SRCS-y += xg_sr_save.c
SRCS-y += xg_offline_page.c
-else
-SRCS-y += xg_nomigrate.c
endif
SRCS-y += xg_core.c
SRCS-$(CONFIG_X86) += xg_core_x86.c
diff --git a/tools/libs/guest/xg_offline_page.c
b/tools/libs/guest/xg_offline_page.c
index cfe0e2d537..92b65243b1 100644
--- a/tools/libs/guest/xg_offline_page.c
+++ b/tools/libs/guest/xg_offline_page.c
@@ -29,7 +29,6 @@
#include "xc_private.h"
#include "xg_private.h"
-#include "xg_save_restore.h"
struct pte_backup_entry
{
diff --git a/tools/libs/light/Makefile b/tools/libs/light/Makefile
index 7d8c51d492..68e51dd13c 100644
--- a/tools/libs/light/Makefile
+++ b/tools/libs/light/Makefile
@@ -179,7 +179,7 @@ $(ACPI_OBJS) $(ACPI_PIC_OBJS): CFLAGS += -I.
-DLIBACPI_STDUTILS=\"$(CURDIR)/libx
$(TEST_PROG_OBJS) _libxl.api-for-check: CFLAGS += $(CFLAGS_libxentoollog)
$(CFLAGS_libxentoolcore)
libxl_dom.o libxl_dom.opic: CFLAGS += -I$(XEN_ROOT)/tools # include
libacpi/x86.h
libxl_x86_acpi.o libxl_x86_acpi.opic: CFLAGS += -I$(XEN_ROOT)/tools
-$(SAVE_HELPER_OBJS): CFLAGS += $(CFLAGS_libxenctrl) $(CFLAGS_libxenevtchn)
$(CFLAGS_libxenguest)
+$(SAVE_HELPER_OBJS): CFLAGS += $(CFLAGS_libxenctrl) $(CFLAGS_libxenevtchn)
$(CFLAGS_libxensaverestore)
testidl.o: CFLAGS += $(CFLAGS_libxenctrl) $(CFLAGS_libxenlight)
testidl.c: libxl_types.idl gentest.py $(XEN_INCLUDE)/libxl.h $(AUTOINCS)
@@ -241,7 +241,7 @@ test_%: test_%.o test_common.o libxenlight_test.so
$(CC) $(LDFLAGS) -o $@ $^ $(filter-out %libxenlight.so,
$(LDLIBS_libxenlight)) $(LDLIBS_libxentoollog) $(LDLIBS_libxentoolcore) -lyajl
$(APPEND_LDFLAGS)
libxl-save-helper: $(SAVE_HELPER_OBJS) libxenlight.so
- $(CC) $(LDFLAGS) -o $@ $(SAVE_HELPER_OBJS) $(LDLIBS_libxentoollog)
$(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(LDLIBS_libxentoolcore)
$(APPEND_LDFLAGS)
+ $(CC) $(LDFLAGS) -o $@ $(SAVE_HELPER_OBJS) $(LDLIBS_libxentoollog)
$(LDLIBS_libxenctrl) $(LDLIBS_libxensaverestore) $(LDLIBS_libxentoolcore)
$(APPEND_LDFLAGS)
testidl: testidl.o libxenlight.so
$(CC) $(LDFLAGS) -o $@ testidl.o $(LDLIBS_libxenlight)
$(LDLIBS_libxentoollog) $(LDLIBS_libxentoolcore) $(APPEND_LDFLAGS)
diff --git a/tools/libs/light/libxl_internal.h
b/tools/libs/light/libxl_internal.h
index 0b4671318c..439c654733 100644
--- a/tools/libs/light/libxl_internal.h
+++ b/tools/libs/light/libxl_internal.h
@@ -56,6 +56,7 @@
#define XC_WANT_COMPAT_MAP_FOREIGN_API
#include <xenctrl.h>
#include <xenguest.h>
+#include <xensaverestore.h>
#include <xenhypfs.h>
#include <xen-tools/libs.h>
diff --git a/tools/libs/light/libxl_save_helper.c
b/tools/libs/light/libxl_save_helper.c
index 65dff389bf..896e845a2f 100644
--- a/tools/libs/light/libxl_save_helper.c
+++ b/tools/libs/light/libxl_save_helper.c
@@ -48,6 +48,7 @@
#include "xenctrl.h"
#include "xenguest.h"
+#include "xensaverestore.h"
#include "_libxl_save_msgs_helper.h"
/*----- logger -----*/
diff --git a/tools/libs/light/libxl_save_msgs_gen.pl
b/tools/libs/light/libxl_save_msgs_gen.pl
index 9d425b1dee..f263ee01bb 100755
--- a/tools/libs/light/libxl_save_msgs_gen.pl
+++ b/tools/libs/light/libxl_save_msgs_gen.pl
@@ -72,7 +72,7 @@ END_BOTH
END_CALLOUT
#include <xenctrl.h>
-#include <xenguest.h>
+#include <xensaverestore.h>
#include "_libxl_save_msgs_${ah}.h"
END_HELPER
diff --git a/tools/libs/saverestore/Makefile b/tools/libs/saverestore/Makefile
new file mode 100644
index 0000000000..48728b3be2
--- /dev/null
+++ b/tools/libs/saverestore/Makefile
@@ -0,0 +1,38 @@
+XEN_ROOT = $(CURDIR)/../../..
+include $(XEN_ROOT)/tools/Rules.mk
+
+ifeq ($(CONFIG_MIGRATE),y)
+SRCS-y += common.c
+SRCS-$(CONFIG_X86) += common_x86.c
+SRCS-$(CONFIG_X86) += common_x86_pv.c
+SRCS-$(CONFIG_X86) += restore_x86_pv.c
+SRCS-$(CONFIG_X86) += restore_x86_hvm.c
+SRCS-$(CONFIG_X86) += save_x86_pv.c
+SRCS-$(CONFIG_X86) += save_x86_hvm.c
+SRCS-y += restore.c
+SRCS-y += save.c
+else
+SRCS-y += nomigrate.c
+endif
+
+CFLAGS += -I$(XEN_libxenctrl)
+CFLAGS += -I$(XEN_libxenguest)
+
+-include $(XEN_TARGET_ARCH)/Makefile
+
+CFLAGS += -Werror -Wmissing-prototypes
+CFLAGS += -I. -I./include $(CFLAGS_xeninclude)
+CFLAGS += -D__XEN_TOOLS__
+CFLAGS += -include $(XEN_ROOT)/tools/config.h
+# Needed for asprintf()
+CFLAGS-$(CONFIG_Linux) += -D_GNU_SOURCE
+
+LIBHEADER := xensaverestore.h
+
+NO_HEADERS_CHK := y
+
+include $(XEN_ROOT)/tools/libs/libs.mk
+
+.PHONY: cleanlocal
+cleanlocal:
+ rm -f libxensaverestore.map
diff --git a/tools/libs/guest/xg_sr_common.c b/tools/libs/saverestore/common.c
similarity index 99%
rename from tools/libs/guest/xg_sr_common.c
rename to tools/libs/saverestore/common.c
index 17567ab133..77128bc747 100644
--- a/tools/libs/guest/xg_sr_common.c
+++ b/tools/libs/saverestore/common.c
@@ -1,6 +1,6 @@
#include <assert.h>
-#include "xg_sr_common.h"
+#include "common.h"
#include <xen-tools/libs.h>
diff --git a/tools/libs/guest/xg_sr_common.h b/tools/libs/saverestore/common.h
similarity index 98%
rename from tools/libs/guest/xg_sr_common.h
rename to tools/libs/saverestore/common.h
index e2994e18ac..ca2eb47a4f 100644
--- a/tools/libs/guest/xg_sr_common.h
+++ b/tools/libs/saverestore/common.h
@@ -1,13 +1,25 @@
#ifndef __COMMON__H
#define __COMMON__H
+#include <unistd.h>
+#include <errno.h>
#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "xc_private.h"
+#include "xenguest.h"
+#include "xensaverestore.h"
#include "xg_private.h"
-#include "xg_save_restore.h"
+#include "save_restore.h"
#include "xc_bitops.h"
-#include "xg_sr_stream_format.h"
+#include "stream_format.h"
/* String representation of Domain Header types. */
const char *dhdr_type_to_str(uint32_t type);
diff --git a/tools/libs/guest/xg_sr_common_x86.c
b/tools/libs/saverestore/common_x86.c
similarity index 99%
rename from tools/libs/guest/xg_sr_common_x86.c
rename to tools/libs/saverestore/common_x86.c
index 563b4f0168..f1beb234ae 100644
--- a/tools/libs/guest/xg_sr_common_x86.c
+++ b/tools/libs/saverestore/common_x86.c
@@ -1,4 +1,4 @@
-#include "xg_sr_common_x86.h"
+#include "common_x86.h"
int write_x86_tsc_info(struct xc_sr_context *ctx)
{
diff --git a/tools/libs/guest/xg_sr_common_x86.h
b/tools/libs/saverestore/common_x86.h
similarity index 98%
rename from tools/libs/guest/xg_sr_common_x86.h
rename to tools/libs/saverestore/common_x86.h
index b55758c96d..3a2d91dcb8 100644
--- a/tools/libs/guest/xg_sr_common_x86.h
+++ b/tools/libs/saverestore/common_x86.h
@@ -1,7 +1,7 @@
#ifndef __COMMON_X86__H
#define __COMMON_X86__H
-#include "xg_sr_common.h"
+#include "common.h"
/*
* Obtains a domains TSC information from Xen and writes a X86_TSC_INFO record
diff --git a/tools/libs/guest/xg_sr_common_x86_pv.c
b/tools/libs/saverestore/common_x86_pv.c
similarity index 99%
rename from tools/libs/guest/xg_sr_common_x86_pv.c
rename to tools/libs/saverestore/common_x86_pv.c
index c0acf00f90..cfe1b24bed 100644
--- a/tools/libs/guest/xg_sr_common_x86_pv.c
+++ b/tools/libs/saverestore/common_x86_pv.c
@@ -1,6 +1,6 @@
#include <assert.h>
-#include "xg_sr_common_x86_pv.h"
+#include "common_x86_pv.h"
xen_pfn_t mfn_to_pfn(struct xc_sr_context *ctx, xen_pfn_t mfn)
{
diff --git a/tools/libs/guest/xg_sr_common_x86_pv.h
b/tools/libs/saverestore/common_x86_pv.h
similarity index 98%
rename from tools/libs/guest/xg_sr_common_x86_pv.h
rename to tools/libs/saverestore/common_x86_pv.h
index 953b5bfb8d..a9f8c970e3 100644
--- a/tools/libs/guest/xg_sr_common_x86_pv.h
+++ b/tools/libs/saverestore/common_x86_pv.h
@@ -1,7 +1,7 @@
#ifndef __COMMON_X86_PV_H
#define __COMMON_X86_PV_H
-#include "xg_sr_common_x86.h"
+#include "common_x86.h"
/* Virtual address ranges reserved for hypervisor. */
#define HYPERVISOR_VIRT_START_X86_64 0xFFFF800000000000ULL
diff --git a/tools/libs/guest/xg_nomigrate.c
b/tools/libs/saverestore/nomigrate.c
similarity index 98%
rename from tools/libs/guest/xg_nomigrate.c
rename to tools/libs/saverestore/nomigrate.c
index 6795c62ddc..67e58d353a 100644
--- a/tools/libs/guest/xg_nomigrate.c
+++ b/tools/libs/saverestore/nomigrate.c
@@ -18,7 +18,7 @@
#include <inttypes.h>
#include <errno.h>
#include <xenctrl.h>
-#include <xenguest.h>
+#include <xensaverestore.h>
int xc_domain_save(xc_interface *xch, int io_fd, uint32_t dom, uint32_t flags,
struct save_callbacks *callbacks,
diff --git a/tools/libs/guest/xg_sr_restore.c b/tools/libs/saverestore/restore.c
similarity index 99%
rename from tools/libs/guest/xg_sr_restore.c
rename to tools/libs/saverestore/restore.c
index b57a787519..be259a1c6b 100644
--- a/tools/libs/guest/xg_sr_restore.c
+++ b/tools/libs/saverestore/restore.c
@@ -2,7 +2,7 @@
#include <assert.h>
-#include "xg_sr_common.h"
+#include "common.h"
/*
* Read and validate the Image and Domain headers.
diff --git a/tools/libs/guest/xg_sr_restore_x86_hvm.c
b/tools/libs/saverestore/restore_x86_hvm.c
similarity index 99%
rename from tools/libs/guest/xg_sr_restore_x86_hvm.c
rename to tools/libs/saverestore/restore_x86_hvm.c
index d6ea6f3012..bd63bd2818 100644
--- a/tools/libs/guest/xg_sr_restore_x86_hvm.c
+++ b/tools/libs/saverestore/restore_x86_hvm.c
@@ -1,7 +1,7 @@
#include <assert.h>
#include <arpa/inet.h>
-#include "xg_sr_common_x86.h"
+#include "common_x86.h"
/*
* Process an HVM_CONTEXT record from the stream.
diff --git a/tools/libs/guest/xg_sr_restore_x86_pv.c
b/tools/libs/saverestore/restore_x86_pv.c
similarity index 99%
rename from tools/libs/guest/xg_sr_restore_x86_pv.c
rename to tools/libs/saverestore/restore_x86_pv.c
index dc50b0f5a8..96608e5231 100644
--- a/tools/libs/guest/xg_sr_restore_x86_pv.c
+++ b/tools/libs/saverestore/restore_x86_pv.c
@@ -1,6 +1,6 @@
#include <assert.h>
-#include "xg_sr_common_x86_pv.h"
+#include "common_x86_pv.h"
static xen_pfn_t pfn_to_mfn(const struct xc_sr_context *ctx, xen_pfn_t pfn)
{
diff --git a/tools/libs/guest/xg_sr_save.c b/tools/libs/saverestore/save.c
similarity index 99%
rename from tools/libs/guest/xg_sr_save.c
rename to tools/libs/saverestore/save.c
index 2ba7c3200c..ae3e8797d0 100644
--- a/tools/libs/guest/xg_sr_save.c
+++ b/tools/libs/saverestore/save.c
@@ -1,7 +1,7 @@
#include <assert.h>
#include <arpa/inet.h>
-#include "xg_sr_common.h"
+#include "common.h"
/*
* Writes an Image header and Domain header into the stream.
diff --git a/tools/libs/guest/xg_save_restore.h
b/tools/libs/saverestore/save_restore.h
similarity index 98%
rename from tools/libs/guest/xg_save_restore.h
rename to tools/libs/saverestore/save_restore.h
index 3dbbc8dcd2..20bd3d30a5 100644
--- a/tools/libs/guest/xg_save_restore.h
+++ b/tools/libs/saverestore/save_restore.h
@@ -15,8 +15,6 @@
* License along with this library; If not, see <http://www.gnu.org/licenses/>.
*/
-#include "xc_private.h"
-
#include <xen/foreign/x86_32.h>
#include <xen/foreign/x86_64.h>
diff --git a/tools/libs/guest/xg_sr_save_x86_hvm.c
b/tools/libs/saverestore/save_x86_hvm.c
similarity index 99%
rename from tools/libs/guest/xg_sr_save_x86_hvm.c
rename to tools/libs/saverestore/save_x86_hvm.c
index 1634a7bc43..91c2cb99ab 100644
--- a/tools/libs/guest/xg_sr_save_x86_hvm.c
+++ b/tools/libs/saverestore/save_x86_hvm.c
@@ -1,6 +1,6 @@
#include <assert.h>
-#include "xg_sr_common_x86.h"
+#include "common_x86.h"
#include <xen/hvm/params.h>
diff --git a/tools/libs/guest/xg_sr_save_x86_pv.c
b/tools/libs/saverestore/save_x86_pv.c
similarity index 99%
rename from tools/libs/guest/xg_sr_save_x86_pv.c
rename to tools/libs/saverestore/save_x86_pv.c
index 4964f1f7b8..92f77fad0f 100644
--- a/tools/libs/guest/xg_sr_save_x86_pv.c
+++ b/tools/libs/saverestore/save_x86_pv.c
@@ -1,7 +1,7 @@
#include <assert.h>
#include <limits.h>
-#include "xg_sr_common_x86_pv.h"
+#include "common_x86_pv.h"
/* Check a 64 bit virtual address for being canonical. */
static inline bool is_canonical_address(xen_vaddr_t vaddr)
diff --git a/tools/libs/guest/xg_sr_stream_format.h
b/tools/libs/saverestore/stream_format.h
similarity index 100%
rename from tools/libs/guest/xg_sr_stream_format.h
rename to tools/libs/saverestore/stream_format.h
diff --git a/tools/libs/uselibs.mk b/tools/libs/uselibs.mk
index efd7a475ba..62a2990b95 100644
--- a/tools/libs/uselibs.mk
+++ b/tools/libs/uselibs.mk
@@ -20,6 +20,8 @@ LIBS_LIBS += ctrl
USELIBS_ctrl := toollog call evtchn gnttab foreignmemory devicemodel
LIBS_LIBS += guest
USELIBS_guest := evtchn ctrl
+LIBS_LIBS += saverestore
+USELIBS_saverestore := guest ctrl
LIBS_LIBS += store
USELIBS_store := toolcore
LIBS_LIBS += vchan
@@ -27,7 +29,7 @@ USELIBS_vchan := toollog store gnttab evtchn
LIBS_LIBS += stat
USELIBS_stat := ctrl store
LIBS_LIBS += light
-USELIBS_light := toollog evtchn toolcore ctrl store hypfs guest
+USELIBS_light := toollog evtchn toolcore ctrl store hypfs guest saverestore
LIBS_LIBS += util
USELIBS_util := light
FILENAME_util := xlutil
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