[PATCH RFC v13 20/20] PVH xen tools: libxl changes to create a PVH guest.

[George Dunlap <george.dunlap@eu.citrix.com>]

From: Mukesh Rathor <mukesh.rathor@oracle.com>

Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
---
v13 (gwd):
 - Added XEN_DOMCTL_CDF_pvh_guest flag
CC: Ian Jackson <ian.jackson@citrix.com>
CC: Ian Campbell <ian.campbell@citrix.com>
---
 docs/man/xl.cfg.pod.5        |    3 +++
 tools/libxl/libxl.h          |    6 ++++++
 tools/libxl/libxl_create.c   |   13 +++++++++++++
 tools/libxl/libxl_dom.c      |    2 ++
 tools/libxl/libxl_internal.h |    1 +
 tools/libxl/libxl_types.idl  |    1 +
 tools/libxl/libxl_x86.c      |    4 +++-
 tools/libxl/xl_cmdimpl.c     |    1 +
 8 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/docs/man/xl.cfg.pod.5 b/docs/man/xl.cfg.pod.5
index 769767b..69a4cc1 100644
--- a/docs/man/xl.cfg.pod.5
+++ b/docs/man/xl.cfg.pod.5
@@ -634,6 +634,9 @@ 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
diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index 4cab294..2801da4 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -355,6 +355,12 @@
  */
 #define LIBXL_HAVE_SPICE_VDAGENT 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. */
diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index 7567238..a8e773a 100644
--- a/tools/libxl/libxl_create.c
+++ b/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);
@@ -349,6 +352,8 @@ 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;
@@ -408,6 +413,14 @@ 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;
 
diff --git a/tools/libxl/libxl_dom.c b/tools/libxl/libxl_dom.c
index 6e2252a..89e919e 100644
--- a/tools/libxl/libxl_dom.c
+++ b/tools/libxl/libxl_dom.c
@@ -338,6 +338,8 @@ 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\n", state->pv_kernel.mapped, state->pv_kernel.path);
     if (state->pv_kernel.mapped) {
         ret = xc_dom_kernel_mem(dom,
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index f051d91..441ec66 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -886,6 +886,7 @@ 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,
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index 049dbb5..e83b70d 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -257,6 +257,7 @@ 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)
 
 MemKB = UInt(64, init_val = "LIBXL_MEMKB_DEFAULT")
diff --git a/tools/libxl/libxl_x86.c b/tools/libxl/libxl_x86.c
index a78c91d..87a8110 100644
--- a/tools/libxl/libxl_x86.c
+++ b/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);
diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 3d7eaad..7f36423 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -610,6 +610,7 @@ 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)) {
-- 
1.7.9.5