[RFC 2/4] Add VMF tool

["Smith, Jackson" <rsmith@xxxxxxxxxxxxxxxxxxxxx>]

VMF tool for calling vmf_op hypercall. Eventually should be merged into xl and
related libraries.
---
 tools/Makefile     |  1 +
 tools/vmf/Makefile | 32 +++++++++++++++++++++++++++
 tools/vmf/vmf.c    | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 98 insertions(+)
 create mode 100644 tools/vmf/Makefile
 create mode 100644 tools/vmf/vmf.c

diff --git a/tools/Makefile b/tools/Makefile
index 7997535..ccf36a1 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -9,6 +9,7 @@ SUBDIRS-y += libs
 SUBDIRS-y += flask
 SUBDIRS-y += fuzz
 SUBDIRS-y += xenstore
+SUBDIRS-y += vmf
 SUBDIRS-y += misc
 SUBDIRS-y += examples
 SUBDIRS-y += hotplug
diff --git a/tools/vmf/Makefile b/tools/vmf/Makefile
new file mode 100644
index 0000000..ac5073b
--- /dev/null
+++ b/tools/vmf/Makefile
@@ -0,0 +1,32 @@
+XEN_ROOT=$(CURDIR)/../..
+include $(XEN_ROOT)/tools/Rules.mk
+
+CFLAGS  += $(CFLAGS_libxenctrl)
+LDLIBS  += $(LDLIBS_libxenctrl)
+
+.PHONY: all
+all: build
+
+.PHONY: build
+build: vmf
+
+.PHONY: install
+install: build
+       $(INSTALL_DIR) $(DESTDIR)$(bindir)
+       $(INSTALL_PROG) vmf $(DESTDIR)$(bindir)/vmf
+
+.PHONY: uninstall
+uninstall:
+       rm -f $(DESTDIR)$(bindir)/vmf
+
+.PHONY: clean
+clean:
+       $(RM) -f $(DEPS_RM) vmf vmf.o
+
+.PHONY: distclean
+distclean: clean
+
+vmf: vmf.o Makefile
+       $(CC) $(LDFLAGS) $< -o $@ $(LDLIBS) $(APPEND_LDFLAGS)
+
+-include $(DEPS_INCLUDE)
diff --git a/tools/vmf/vmf.c b/tools/vmf/vmf.c
new file mode 100644
index 0000000..8b7b293
--- /dev/null
+++ b/tools/vmf/vmf.c
@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <xenctrl.h>
+
+#include <xen/xen.h>
+#include <xen/vmf.h>
+
+int call(unsigned int cmd, unsigned int domid)
+{
+  int ret;
+
+  xc_interface *xch = xc_interface_open(NULL, NULL, 0);
+  ret = xc_vmf_op(xch, cmd, domid);
+  xc_interface_close(xch);
+
+  return ret;
+}
+
+void help(const char *arg0)
+{
+  printf("Usage:\n");
+  printf("  %s dump\n", arg0);
+  printf("  %s info <domid>\n", arg0);
+  printf("  %s tables <domid>\n", arg0);
+  printf("  %s unmap <domid>\n", arg0);
+  printf("  %s lock\n", arg0);
+}
+
+int get_domid(const char *str) {
+  char *endptr;
+  long domid = strtol(str, &endptr, 10);
+  if (domid >= 0)
+    return (int)domid;
+
+  printf("Invalid domid (%ld)\n", domid);
+  exit(1);
+}
+
+int main(int argc, const char* argv[])
+{
+  int domid;
+  if (argc == 2) {
+    domid = DOMID_IDLE;
+  } else if (argc == 3) {
+    domid = get_domid(argv[2]);
+  } else {
+    help(argv[0]);
+    return 0;
+  }
+
+#define ARG(cmd) ((strcmp(cmd, argv[1]) == 0))
+
+  if (ARG("info"))
+    return call(XENVMF_dump_info, domid);
+  else if (ARG("tables"))
+    return call(XENVMF_dump_tables, domid);
+  else if (ARG("unmap"))
+    return call(XENVMF_unmap, domid);
+  else if (ARG("lock") && (argc == 2))
+    return call(XENVMF_unmap, DOMID_IDLE);
+
+  help(argv[0]);
+  return 0;
+}
-- 
2.7.4