[V3,1/2] xen: Add xc_domain_add_to_physmap to xen_interface.

Submitted by Anthony PERARD on May 24, 2011, 1:34 p.m.

Details

Message ID 1306244061-18503-2-git-send-email-anthony.perard@citrix.com
State New
Headers show

Commit Message

Anthony PERARD May 24, 2011, 1:34 p.m.
From: Anthony PERARD <anthony.perard@citrix.com>

This function will be used to support sync dirty bitmap.

This come with a check against every Xen release, and special
implementation for Xen version that doesn't have this specific call.

This function will not be usable with Xen 3.3 because the behavior is

Patch hide | download patch | download mbox

different.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
---
 configure       |   29 ++++++++++++++++++++++++++++-
 hw/xen_common.h |   14 ++++++++++++++
 2 files changed, 42 insertions(+), 1 deletions(-)

diff --git a/configure b/configure
index a318d37..7886d3f 100755
--- a/configure
+++ b/configure
@@ -1206,6 +1206,7 @@  int main(void) {
   xc = xc_interface_open(0, 0, 0);
   xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
   xc_gnttab_open(NULL, 0);
+  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
   return 0;
 }
 EOF
@@ -1224,10 +1225,14 @@  EOF
 # error HVM_MAX_VCPUS not defined
 #endif
 int main(void) {
+  struct xen_add_to_physmap xatp = {
+    .domid = 0, .space = XENMAPSPACE_gmfn, .idx = 0, .gpfn = 0,
+  };
   xs_daemon_open();
   xc_interface_open();
   xc_gnttab_open();
   xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
+  xc_memory_op(0, XENMEM_add_to_physmap, &xatp);
   return 0;
 }
 EOF
@@ -1236,7 +1241,29 @@  EOF
     xen_ctrl_version=400
     xen=yes
 
-  # Xen 3.3.0, 3.4.0
+  # Xen 3.4.0
+  elif (
+      cat > $TMPC <<EOF
+#include <xenctrl.h>
+#include <xs.h>
+int main(void) {
+  struct xen_add_to_physmap xatp = {
+    .domid = 0, .space = XENMAPSPACE_gmfn, .idx = 0, .gpfn = 0,
+  };
+  xs_daemon_open();
+  xc_interface_open();
+  xc_gnttab_open();
+  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
+  xc_memory_op(0, XENMEM_add_to_physmap, &xatp);
+  return 0;
+}
+EOF
+      compile_prog "" "$xen_libs"
+    ) ; then
+    xen_ctrl_version=340
+    xen=yes
+
+  # Xen 3.3.0
   elif (
       cat > $TMPC <<EOF
 #include <xenctrl.h>
diff --git a/hw/xen_common.h b/hw/xen_common.h
index a1958a0..2c79af6 100644
--- a/hw/xen_common.h
+++ b/hw/xen_common.h
@@ -71,6 +71,20 @@  static inline int xc_domain_populate_physmap_exact
         (xc_handle, domid, nr_extents, extent_order, mem_flags, extent_start);
 }
 
+static inline int xc_domain_add_to_physmap(int xc_handle, uint32_t domid,
+                                           unsigned int space, unsigned long idx,
+                                           xen_pfn_t gpfn)
+{
+    struct xen_add_to_physmap xatp = {
+        .domid = domid,
+        .space = space,
+        .idx = idx,
+        .gpfn = gpfn,
+    };
+
+    return xc_memory_op(xc_handle, XENMEM_add_to_physmap, &xatp);
+}
+
 
 /* Xen 4.1 */
 #else