pvh tools: libxl changes to create a PVH guest

Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
Acked-by: Tim Deegan <tim@xen.org>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Keir Fraser <keir@xen.org>
Acked-by: Eddie Dong <eddie.dong@intel.com>

docs/man/xl.cfg.pod.5

@@ -653,6 +653,9 @@ if your particular guest kernel does not require this behaviour then
 it is safe to allow this to be enabled but you may wish to disable it
 anyway.
 
+=item B<pvh=BOOLEAN>
+Selects whether to run this PV guest in an HVM container. Default is 0.
+
 =back
 
 =head2 Fully-virtualised (HVM) Guest Specific Options

tools/libxl/libxl.h

@@ -369,6 +369,12 @@
  */
 #define LIBXL_HAVE_DOMAIN_CREATE_RESTORE_PARAMS 1
 
+/*
+ * LIBXL_HAVE_CREATEINFO_PVH
+ * If this is defined, then libxl supports creation of a PVH guest.
+ */
+#define LIBXL_HAVE_CREATEINFO_PVH 1
+
 /* Functions annotated with LIBXL_EXTERNAL_CALLERS_ONLY may not be
  * called from within libxl itself. Callers outside libxl, who
  * do not #include libxl_internal.h, are fine. */

tools/libxl/libxl_create.c

@@ -33,6 +33,9 @@ int libxl__domain_create_info_setdefault(libxl__gc *gc,
     if (c_info->type == LIBXL_DOMAIN_TYPE_HVM) {
         libxl_defbool_setdefault(&c_info->hap, true);
         libxl_defbool_setdefault(&c_info->oos, true);
+    } else {
+        libxl_defbool_setdefault(&c_info->pvh, false);
+        libxl_defbool_setdefault(&c_info->hap, libxl_defbool_val(c_info->pvh));
     }
 
     libxl_defbool_setdefault(&c_info->run_hotplug_scripts, true);
@@ -381,6 +384,8 @@ int libxl__domain_build(libxl__gc *gc,
 
         break;
     case LIBXL_DOMAIN_TYPE_PV:
+        state->pvh_enabled = libxl_defbool_val(d_config->c_info.pvh);
+
         ret = libxl__build_pv(gc, domid, info, state);
         if (ret)
             goto out;
@@ -440,6 +445,14 @@ int libxl__domain_make(libxl__gc *gc, libxl_domain_create_info *info,
         flags |= XEN_DOMCTL_CDF_hvm_guest;
         flags |= libxl_defbool_val(info->hap) ? XEN_DOMCTL_CDF_hap : 0;
         flags |= libxl_defbool_val(info->oos) ? 0 : XEN_DOMCTL_CDF_oos_off;
+    } else if (libxl_defbool_val(info->pvh)) {
+        flags |= XEN_DOMCTL_CDF_pvh_guest;
+        if (!libxl_defbool_val(info->hap)) {
+            LOG(ERROR, "HAP must be on for PVH");
+            rc = ERROR_INVAL;
+            goto out;
+        }
+        flags |= XEN_DOMCTL_CDF_hap;
     }
     *domid = -1;
 

tools/libxl/libxl_dom.c

@@ -348,7 +348,10 @@ int libxl__build_pv(libxl__gc *gc, uint32_t domid,
         return ERROR_FAIL;
     }
 
+    dom->pvh_enabled = state->pvh_enabled;
+
     LOG(DEBUG, "pv kernel mapped %d path %s", state->pv_kernel.mapped, state->pv_kernel.path);
+
     if (state->pv_kernel.mapped) {
         ret = xc_dom_kernel_mem(dom,
                                 state->pv_kernel.data,

tools/libxl/libxl_internal.h

@@ -887,6 +887,7 @@ typedef struct {
     libxl__file_reference pv_kernel;
     libxl__file_reference pv_ramdisk;
     const char * pv_cmdline;
+    bool pvh_enabled;
 } libxl__domain_build_state;
 
 _hidden int libxl__build_pre(libxl__gc *gc, uint32_t domid,

tools/libxl/libxl_types.idl

@@ -274,6 +274,7 @@ libxl_domain_create_info = Struct("domain_create_info",[
     ("platformdata", libxl_key_value_list),
     ("poolid",       uint32),
     ("run_hotplug_scripts",libxl_defbool),
+    ("pvh",          libxl_defbool),
     ], dir=DIR_IN)
 
 libxl_domain_restore_params = Struct("domain_restore_params", [

tools/libxl/libxl_x86.c

@@ -290,7 +290,9 @@ int libxl__arch_domain_create(libxl__gc *gc, libxl_domain_config *d_config,
     if (rtc_timeoffset)
         xc_domain_set_time_offset(ctx->xch, domid, rtc_timeoffset);
 
-    if (d_config->b_info.type == LIBXL_DOMAIN_TYPE_HVM) {
+    if (d_config->b_info.type == LIBXL_DOMAIN_TYPE_HVM ||
+        libxl_defbool_val(d_config->c_info.pvh)) {
+
         unsigned long shadow;
         shadow = (d_config->b_info.shadow_memkb + 1023) / 1024;
         xc_shadow_control(ctx->xch, domid, XEN_DOMCTL_SHADOW_OP_SET_ALLOCATION, NULL, 0, &shadow, 0, NULL);

tools/libxl/xl_cmdimpl.c

@@ -642,6 +642,7 @@ static void parse_config_data(const char *config_source,
         !strncmp(buf, "hvm", strlen(buf)))
         c_info->type = LIBXL_DOMAIN_TYPE_HVM;
 
+    xlu_cfg_get_defbool(config, "pvh", &c_info->pvh, 0);
     xlu_cfg_get_defbool(config, "hap", &c_info->hap, 0);
 
     if (xlu_cfg_replace_string (config, "name", &c_info->name, 0)) {