[Xen-changelog] [xen master] libxl: No emulated disk driver for xvdX disk

[patchbot@xxxxxxx]

commit c0c099d157cc5bc942afef766cf141628a6380a1
Author:     Anthony PERARD <anthony.perard@xxxxxxxxxx>
AuthorDate: Wed Oct 14 12:05:17 2015 +0100
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Thu Oct 22 16:10:31 2015 +0100

    libxl: No emulated disk driver for xvdX disk
    
    When a guest configuration list xvdX for its disks, there is no need to
    provide an emulated driver for the same target.
    
    Such configuration can work with the OVMF firmware, as it supports PV
    disk.
    
    Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
    Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 tools/libxl/libxl_dm.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index e33d492..9c9eaa3 100644
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -1189,6 +1189,12 @@ static int libxl__build_device_model_args_new(libxl__gc 
*gc,
                     drive = libxl__sprintf
                         (gc, 
"file=%s,if=scsi,bus=0,unit=%d,format=%s,cache=writeback",
                          pdev_path, disk, format);
+                else if (strncmp(disks[i].vdev, "xvd", 3) == 0)
+                    /*
+                     * Do not add any emulated disk when PV disk are
+                     * explicitly asked for.
+                     */
+                    continue;
                 else if (disk < 6 && b_info->u.hvm.hdtype == 
LIBXL_HDTYPE_AHCI) {
                     flexarray_vappend(dm_args, "-drive",
                         
GCSPRINTF("file=%s,if=none,id=ahcidisk-%d,format=%s,cache=writeback",
--
generated by git-patchbot for /home/xen/git/xen.git#master

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog