xen: make it possible to build without the Xen PV domain builder

Until the previous patch this relied on xc_fd(), which was only
implemented for Xen 4.0 and earlier.

Given this wasn't working since Xen 4.0 I have marked this as disabled
by default.

Removing this support drops the use of a bunch of symbols from
libxenctrl, specifically:

  - xc_domain_create
  - xc_domain_destroy
  - xc_domain_getinfo
  - xc_domain_max_vcpus
  - xc_domain_setmaxmem
  - xc_domain_unpause
  - xc_evtchn_alloc_unbound
  - xc_linux_build

This is another step towards only using Xen libraries which provide a
stable inteface.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/hw/xenpv/xen_machine_pv.c b/hw/xenpv/xen_machine_pv.c
index 23d6ef07ea..3250b94900 100644
--- a/hw/xenpv/xen_machine_pv.c
+++ b/hw/xenpv/xen_machine_pv.c
@@ -30,9 +30,6 @@
 
 static void xen_init_pv(MachineState *machine)
 {
-    const char *kernel_filename = machine->kernel_filename;
-    const char *kernel_cmdline = machine->kernel_cmdline;
-    const char *initrd_filename = machine->initrd_filename;
     DriveInfo *dinfo;
     int i;
 
@@ -46,17 +43,27 @@ static void xen_init_pv(MachineState *machine)
     case XEN_ATTACH:
         /* nothing to do, xend handles everything */
         break;
-    case XEN_CREATE:
+#ifdef CONFIG_XEN_PV_DOMAIN_BUILD
+    case XEN_CREATE: {
+        const char *kernel_filename = machine->kernel_filename;
+        const char *kernel_cmdline = machine->kernel_cmdline;
+        const char *initrd_filename = machine->initrd_filename;
         if (xen_domain_build_pv(kernel_filename, initrd_filename,
                                 kernel_cmdline) < 0) {
             fprintf(stderr, "xen pv domain creation failed\n");
             exit(1);
         }
         break;
+    }
+#endif
     case XEN_EMULATE:
         fprintf(stderr, "xen emulation not implemented (yet)\n");
         exit(1);
         break;
+    default:
+        fprintf(stderr, "unhandled xen_mode %d\n", xen_mode);
+        exit(1);
+        break;
     }
 
     xen_be_register("console", &xen_console_ops);