[xen staging] tools/libxl: Provide a static_data_done callback for domain restore

[patchbot@xxxxxxx]

commit c1a552ec7fcd95a2c5af0da105c58a2773944cd7
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Dec 20 11:58:03 2019 +0000
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Fri May 29 17:33:03 2020 +0100

    tools/libxl: Provide a static_data_done callback for domain restore
    
    This will be needed shortly to provide backwards compatiblity for migration
    streams which do not have CPUID information contained within them.
    
    No functional change yet.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 tools/libxl/libxl_create.c         | 12 ++++++++++++
 tools/libxl/libxl_save_msgs_gen.pl |  1 +
 2 files changed, 13 insertions(+)

diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index 8614a2c241..baed817a96 100644
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -1358,6 +1358,7 @@ static void domcreate_bootloader_done(libxl__egc *egc,
     dcs->srs.dcs = dcs;
 
     /* Restore */
+    callbacks->static_data_done = libxl__srm_callout_callback_static_data_done;
     callbacks->restore_results = libxl__srm_callout_callback_restore_results;
 
     /* COLO only supports HVM now because it does not work very
@@ -1427,6 +1428,17 @@ static void libxl__colo_restore_setup_done(libxl__egc 
*egc,
     libxl__stream_read_start(egc, &dcs->srs);
 }
 
+int libxl__srm_callout_callback_static_data_done(void *user)
+{
+    libxl__save_helper_state *shs = user;
+    libxl__domain_create_state *dcs = shs->caller_state;
+    STATE_AO_GC(dcs->ao);
+
+    /* Nothing to do (yet). */
+
+    return 0;
+}
+
 void libxl__srm_callout_callback_restore_results(xen_pfn_t store_mfn,
           xen_pfn_t console_mfn, void *user)
 {
diff --git a/tools/libxl/libxl_save_msgs_gen.pl 
b/tools/libxl/libxl_save_msgs_gen.pl
index 831a15e0bb..93dc252370 100755
--- a/tools/libxl/libxl_save_msgs_gen.pl
+++ b/tools/libxl/libxl_save_msgs_gen.pl
@@ -29,6 +29,7 @@ our @msgs = (
     [ 'srcxA',  "wait_checkpoint", [] ],
     [ 'scxA',   "switch_qemu_logdirty",  [qw(uint32_t domid
                                           unsigned enable)] ],
+    [ 'rcxW',   "static_data_done",      [] ],
     [ 'rcx',    "restore_results",       ['xen_pfn_t', 'store_gfn',
                                           'xen_pfn_t', 'console_gfn'] ],
     [ 'srW',    "complete",              [qw(int retval
--
generated by git-patchbot for /home/xen/git/xen.git#staging