[Xen-changelog] [qemu-xen staging] config: split PVRDMA from RDMA

[patchbot@xxxxxxx]

commit de5b678ca4dcdfa83e322491d478d66df56c1986
Author:     Marcel Apfelbaum <marcel.apfelbaum@xxxxxxxxx>
AuthorDate: Thu Aug 16 18:16:37 2018 +0300
Commit:     Anthony PERARD <anthony.perard@xxxxxxxxxx>
CommitDate: Mon Aug 27 12:36:06 2018 +0100

    config: split PVRDMA from RDMA
    
    In some BSD systems RDMA migration is possible while
    the pvrdma device can't be used because the mremap system call
    is missing.
    
    Reported-by: Rebecca Cran <rebecca@xxxxxxxxxxxx>
    Signed-off-by: Marcel Apfelbaum <marcel.apfelbaum@xxxxxxxxx>
    Message-Id: <20180816151637.24553-1-marcel.apfelbaum@xxxxxxxxx>
    Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
    (cherry picked from commit 21ab34c9543fe1b6d31b3edbd01a397e7e090d00)
---
 configure             | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 hw/rdma/Makefile.objs |  2 +-
 2 files changed, 55 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 2a7796ea80..b6d37a735b 100755
--- a/configure
+++ b/configure
@@ -375,6 +375,7 @@ hax="no"
 hvf="no"
 whpx="no"
 rdma=""
+pvrdma=""
 gprof="no"
 debug_tcg="no"
 debug="no"
@@ -1363,6 +1364,10 @@ for opt do
   ;;
   --disable-rdma) rdma="no"
   ;;
+  --enable-pvrdma) pvrdma="yes"
+  ;;
+  --disable-pvrdma) pvrdma="no"
+  ;;
   --with-gtkabi=*) gtkabi="$optarg"
   ;;
   --disable-vte) vte="no"
@@ -1669,7 +1674,8 @@ disabled with --disable-FEATURE, default is enabled if 
available:
   hax             HAX acceleration support
   hvf             Hypervisor.framework acceleration support
   whpx            Windows Hypervisor Platform acceleration support
-  rdma            Enable RDMA-based migration and PVRDMA support
+  rdma            Enable RDMA-based migration
+  pvrdma          Enable PVRDMA support
   vde             support for vde network
   netmap          support for netmap network
   linux-aio       Linux AIO support
@@ -3064,6 +3070,48 @@ EOF
   fi
 fi
 
+##########################################
+# PVRDMA detection
+
+cat > $TMPC <<EOF &&
+#include <sys/mman.h>
+
+int
+main(void)
+{
+    char buf = 0;
+    void *addr = &buf;
+    addr = mremap(addr, 0, 1, MREMAP_MAYMOVE | MREMAP_FIXED);
+
+    return 0;
+}
+EOF
+
+if test "$rdma" = "yes" ; then
+    case "$pvrdma" in
+    "")
+        if compile_prog "" ""; then
+            pvrdma="yes"
+        else
+            pvrdma="no"
+        fi
+        ;;
+    "yes")
+        if ! compile_prog "" ""; then
+            error_exit "PVRDMA is not supported since mremap is not 
implemented"
+        fi
+        pvrdma="yes"
+        ;;
+    "no")
+        pvrdma="no"
+        ;;
+    esac
+else
+    if test "$pvrdma" = "yes" ; then
+        error_exit "PVRDMA requires rdma suppport"
+    fi
+    pvrdma="no"
+fi
 
 ##########################################
 # VNC SASL detection
@@ -5952,6 +6000,7 @@ if test "$tcg" = "yes" ; then
 fi
 echo "malloc trim support $malloc_trim"
 echo "RDMA support      $rdma"
+echo "PVRDMA support    $pvrdma"
 echo "fdt support       $fdt"
 echo "membarrier        $membarrier"
 echo "preadv support    $preadv"
@@ -6708,6 +6757,10 @@ if test "$rdma" = "yes" ; then
   echo "RDMA_LIBS=$rdma_libs" >> $config_host_mak
 fi
 
+if test "$pvrdma" = "yes" ; then
+  echo "CONFIG_PVRDMA=y" >> $config_host_mak
+fi
+
 if test "$have_rtnetlink" = "yes" ; then
   echo "CONFIG_RTNETLINK=y" >> $config_host_mak
 fi
diff --git a/hw/rdma/Makefile.objs b/hw/rdma/Makefile.objs
index 3504c39d21..bd36cbf51c 100644
--- a/hw/rdma/Makefile.objs
+++ b/hw/rdma/Makefile.objs
@@ -1,4 +1,4 @@
-ifeq ($(CONFIG_RDMA),y)
+ifeq ($(CONFIG_PVRDMA),y)
 obj-$(CONFIG_PCI) += rdma_utils.o rdma_backend.o rdma_rm.o
 obj-$(CONFIG_PCI) += vmw/pvrdma_dev_ring.o vmw/pvrdma_cmd.o \
                      vmw/pvrdma_qp_ops.o vmw/pvrdma_main.o
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#staging

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