rdma: core logic

Code that does need to be visible is kept
well contained inside this file and this is the only
new additional file to the entire patch.

This file includes the entire protocol and interfaces
required to perform RDMA migration.

Also, the configure and Makefile modifications to link
this file are included.

Full documentation is in docs/rdma.txt

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Chegu Vinod <chegu_vinod@hp.com>
Tested-by: Chegu Vinod <chegu_vinod@hp.com>
Tested-by: Michael R. Hines <mrhines@us.ibm.com>
Signed-off-by: Michael R. Hines <mrhines@us.ibm.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/configure b/configure
index 7c45db2fdd..877a8213f3 100755
--- a/configure
+++ b/configure
@@ -180,6 +180,7 @@ xfs=""
 vhost_net="no"
 vhost_scsi="no"
 kvm="no"
+rdma=""
 gprof="no"
 debug_tcg="no"
 debug="no"
@@ -937,6 +938,10 @@ for opt do
   ;;
   --enable-gtk) gtk="yes"
   ;;
+  --enable-rdma) rdma="yes"
+  ;;
+  --disable-rdma) rdma="no"
+  ;;
   --with-gtkabi=*) gtkabi="$optarg"
   ;;
   --enable-tpm) tpm="yes"
@@ -1095,6 +1100,8 @@ echo "  --enable-bluez           enable bluez stack connectivity"
 echo "  --disable-slirp          disable SLIRP userspace network connectivity"
 echo "  --disable-kvm            disable KVM acceleration support"
 echo "  --enable-kvm             enable KVM acceleration support"
+echo "  --disable-rdma           disable RDMA-based migration support"
+echo "  --enable-rdma            enable RDMA-based migration support"
 echo "  --enable-tcg-interpreter enable TCG with bytecode interpreter (TCI)"
 echo "  --disable-nptl           disable usermode NPTL support"
 echo "  --enable-nptl            enable usermode NPTL support"
@@ -1802,6 +1809,30 @@ EOF
 fi
 
 ##########################################
+# RDMA needs OpenFabrics libraries
+if test "$rdma" != "no" ; then
+  cat > $TMPC <<EOF
+#include <rdma/rdma_cma.h>
+int main(void) { return 0; }
+EOF
+  rdma_libs="-lrdmacm -libverbs"
+  if compile_prog "" "$rdma_libs" ; then
+    rdma="yes"
+    libs_softmmu="$libs_softmmu $rdma_libs"
+  else
+    if test "$rdma" = "yes" ; then
+        error_exit \
+            " OpenFabrics librdmacm/libibverbs not present." \
+            " Your options:" \
+            "  (1) Fast: Install infiniband packages from your distro." \
+            "  (2) Cleanest: Install libraries from www.openfabrics.org" \
+            "  (3) Also: Install softiwarp if you don't have RDMA hardware"
+    fi
+    rdma="no"
+  fi
+fi
+
+##########################################
 # VNC TLS/WS detection
 if test "$vnc" = "yes" -a \( "$vnc_tls" != "no" -o "$vnc_ws" != "no" \) ; then
   cat > $TMPC <<EOF
@@ -3558,6 +3589,7 @@ echo "Linux AIO support $linux_aio"
 echo "ATTR/XATTR support $attr"
 echo "Install blobs     $blobs"
 echo "KVM support       $kvm"
+echo "RDMA support      $rdma"
 echo "TCG interpreter   $tcg_interpreter"
 echo "fdt support       $fdt"
 echo "preadv support    $preadv"
@@ -4046,6 +4078,10 @@ if test "$trace_default" = "yes"; then
   echo "CONFIG_TRACE_DEFAULT=y" >> $config_host_mak
 fi
 
+if test "$rdma" = "yes" ; then
+  echo "CONFIG_RDMA=y" >> $config_host_mak
+fi
+
 if test "$tcg_interpreter" = "yes"; then
   QEMU_INCLUDES="-I\$(SRC_PATH)/tcg/tci $QEMU_INCLUDES"
 elif test "$ARCH" = "sparc64" ; then
@@ -4485,6 +4521,10 @@ if [ "$pixman" = "internal" ]; then
   echo "config-host.h: subdir-pixman" >> $config_host_mak
 fi
 
+if test "$rdma" = "yes" ; then
+echo "CONFIG_RDMA=y" >> $config_host_mak
+fi
+
 if [ "$dtc_internal" = "yes" ]; then
   echo "config-host.h: subdir-dtc" >> $config_host_mak
 fi