[PATCH v8 08/15] libxl: add max possible mfn to libxl_physinfo

[Juergen Gross <jgross@suse.com>]

Add the maximum possible mfn of the host to the libxl_physinfo
data structure.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
---
 tools/libxl/libxl.c         | 1 +
 tools/libxl/libxl.h         | 9 +++++++++
 tools/libxl/libxl_types.idl | 1 +
 3 files changed, 11 insertions(+)

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 247c56cf83..b41ade9fda 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -373,6 +373,7 @@ int libxl_get_physinfo(libxl_ctx *ctx, libxl_physinfo *physinfo)
     physinfo->free_pages = xcphysinfo.free_pages;
     physinfo->scrub_pages = xcphysinfo.scrub_pages;
     physinfo->outstanding_pages = xcphysinfo.outstanding_pages;
+    physinfo->max_possible_mfn = xcphysinfo.max_mfn;
     l = xc_sharing_freed_pages(ctx->xch);
     if (l < 0 && errno == ENOSYS) {
         l = 0;
diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index 7d853ca924..fb960debee 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -644,6 +644,15 @@ typedef struct libxl__ctx libxl_ctx;
 #define LIBXL_HAVE_PHYSINFO_OUTSTANDING_PAGES 1
 
 /*
+ * LIBXL_HAVE_PHYSINFO_MAX_POSSIBLE_MFN
+ *
+ * If this is defined, libxl_physinfo structure will contain an uint64 field
+ * called max_possible_mfn, containing the highest possible mfn on this host,
+ * possibly taking memory hotplug into account.
+ */
+#define LIBXL_HAVE_PHYSINFO_MAX_POSSIBLE_MFN 1
+
+/*
  * LIBXL_HAVE_DOMINFO_OUTSTANDING_MEMKB 1
  *
  * If this is defined, libxl_dominfo will contain a MemKB type field called
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index 756e120ad7..5d9e7aabba 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -895,6 +895,7 @@ libxl_physinfo = Struct("physinfo", [
     ("outstanding_pages", uint64),
     ("sharing_freed_pages", uint64),
     ("sharing_used_frames", uint64),
+    ("max_possible_mfn", uint64),
 
     ("nr_nodes", uint32),
     ("hw_cap", libxl_hwcap),
-- 
2.12.3


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