new file mode 100644
@@ -0,0 +1,30 @@
+XEN_ROOT=$(CURDIR)/../../..
+include $(XEN_ROOT)/tools/Rules.mk
+
+CFLAGS += -Werror
+CFLAGS += -DXC_WANT_COMPAT_DEVICEMODEL_API
+
+CFLAGS += $(CFLAGS_libxenctrl)
+CFLAGS += $(CFLAGS_libxenguest)
+CFLAGS += $(CFLAGS_xeninclude)
+
+TARGETS-y := xen-subpage
+TARGETS := $(TARGETS-y)
+
+.PHONY: all
+all: build
+
+.PHONY: build
+build: $(TARGETS)
+
+.PHONY: clean
+clean:
+ $(RM) *.o $(TARGETS) *~ $(DEPS)
+
+.PHONY: distclean
+distclean: clean
+
+xen-subpage: xen-subpage.o Makefile
+ $(CC) -o $@ $< $(LDFLAGS) $(LDLIBS_libxenctrl) $(LDLIBS_libxenguest) $(LDLIBS_libxenevtchn)
+
+-include $(DEPS)
new file mode 100644
@@ -0,0 +1,125 @@
+/*
+ * xen-subpage.c
+ *
+ * Exercises the basic per-page access mechanisms
+ *
+ * Copyright (c) 2011 Virtuata, Inc.
+ * Copyright (c) 2017 by Intel
+ *
+ *
+ * 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 <errno.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <string.h>
+#include <time.h>
+#include <signal.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <poll.h>
+
+#include <xenctrl.h>
+
+#define DPRINTF(a, b...) fprintf(stderr, a, ## b)
+#define ERROR(a, b...) fprintf(stderr, a "\n", ## b)
+#define PERROR(a, b...) fprintf(stderr, a ": %s\n", ## b, strerror(errno))
+
+void usage(char* progname)
+{
+ fprintf(stderr, "Usage: %s [-m] <domain_id> get|set [gfn] [bit_map]", progname);
+
+ fprintf(stderr,
+ "\n"
+ "set - set gfn bitmap.\n"
+ "\n"
+ "-m requires this program to run\n");
+}
+
+int main(int argc, char *argv[])
+{
+ domid_t domain_id;
+ xc_interface *xch;
+ xen_pfn_t gfn = 0;
+ uint32_t access = 0;
+ int required = 0;
+ int rc = 0;
+
+ char* progname = argv[0];
+ argv++;
+ argc--;
+
+ if ( argc == 5 && argv[0][0] == '-' )
+ {
+ if ( !strcmp(argv[0], "-m") )
+ required = 1;
+ else
+ {
+ usage(progname);
+ return -1;
+ }
+ argv++;
+ argc--;
+ }
+
+ if ( argc != 4 )
+ {
+ usage(progname);
+ return -1;
+ }
+
+ domain_id = atoi(argv[0]);
+ argv++;
+ argc--;
+
+ if ( !strcmp(argv[0], "set") )
+ {
+ gfn = strtoul(argv[1], 0, 0);
+ access = strtoul(argv[2], 0, 0);
+ DPRINTF("set subpage gfn:0x%lx -- map:0x%x\n", gfn, access);
+ xch = xc_interface_open(NULL, NULL, 0);
+ if ( !xch )
+ {
+ ERROR("get interface error\n");
+ return -1;
+ }
+ xc_mem_set_subpage(xch, domain_id, gfn, access);
+ xc_interface_close(xch);
+ }
+ else
+ {
+ usage(argv[0]);
+ return -1;
+ }
+
+ return rc;
+}
+
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */