[Xen-devel] [PATCH v3 2/4] libxl: Move libxl__arch_domain_construct_memmap() earlier

[Maran Wilson <maran.wilson@xxxxxxxxxx>]

From: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>

Since hvm_start_info has now been expanded to include PVH guest's
memory map (i.e. e820) we need to know size of this map by the time we
create dom->start_info_seg in alloc_magic_pages_hvm().

To do so we have to call libxl__arch_domain_construct_memmap() earlier,
before xc_dom_build_image().

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
---
 tools/libxl/libxl_create.c   |  2 +-
 tools/libxl/libxl_dom.c      | 12 +++++++++---
 tools/libxl/libxl_internal.h |  1 +
 tools/libxl/libxl_x86.c      |  3 +++
 4 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index c498135..5dce3df 100644
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -488,7 +488,7 @@ int libxl__domain_build(libxl__gc *gc,
 
         break;
     case LIBXL_DOMAIN_TYPE_PV:
-        ret = libxl__build_pv(gc, domid, info, state);
+        ret = libxl__build_pv(gc, domid, d_config, info, state);
         if (ret)
             goto out;
 
diff --git a/tools/libxl/libxl_dom.c b/tools/libxl/libxl_dom.c
index 2e29b52..917b45e 100644
--- a/tools/libxl/libxl_dom.c
+++ b/tools/libxl/libxl_dom.c
@@ -698,6 +698,7 @@ static int set_vnuma_info(libxl__gc *gc, uint32_t domid,
 }
 
 static int libxl__build_dom(libxl__gc *gc, uint32_t domid,
+             libxl_domain_config *d_config,
              libxl_domain_build_info *info, libxl__domain_build_state *state,
              struct xc_dom_image *dom)
 {
@@ -737,6 +738,11 @@ static int libxl__build_dom(libxl__gc *gc, uint32_t domid,
         LOGE(ERROR, "libxl__arch_domain_finalise_hw_description failed");
         goto out;
     }
+    ret = libxl__arch_domain_construct_memmap(gc, d_config, domid, dom);
+    if (ret != 0) {
+        LOG(ERROR, "setting domain memory map failed");
+        goto out;
+    }
     if ( (ret = xc_dom_build_image(dom)) != 0 ) {
         LOGE(ERROR, "xc_dom_build_image failed");
         goto out;
@@ -758,7 +764,7 @@ out:
     return ret != 0 ? ERROR_FAIL : 0;
 }
 
-int libxl__build_pv(libxl__gc *gc, uint32_t domid,
+int libxl__build_pv(libxl__gc *gc, uint32_t domid, libxl_domain_config 
*d_config,
              libxl_domain_build_info *info, libxl__domain_build_state *state)
 {
     libxl_ctx *ctx = libxl__gc_owner(gc);
@@ -847,7 +853,7 @@ int libxl__build_pv(libxl__gc *gc, uint32_t domid,
             dom->vnode_to_pnode[i] = info->vnuma_nodes[i].pnode;
     }
 
-    ret = libxl__build_dom(gc, domid, info, state, dom);
+    ret = libxl__build_dom(gc, domid, d_config, info, state, dom);
     if (ret != 0)
         goto out;
 
@@ -1293,7 +1299,7 @@ int libxl__build_hvm(libxl__gc *gc, uint32_t domid,
             dom->vnode_to_pnode[i] = info->vnuma_nodes[i].pnode;
     }
 
-    rc = libxl__build_dom(gc, domid, info, state, dom);
+    rc = libxl__build_dom(gc, domid, d_config, info, state, dom);
     if (rc != 0)
         goto out;
 
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 506687f..914df23 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -1159,6 +1159,7 @@ _hidden int libxl__build_post(libxl__gc *gc, uint32_t 
domid,
                char **vms_ents, char **local_ents);
 
 _hidden int libxl__build_pv(libxl__gc *gc, uint32_t domid,
+                            libxl_domain_config *const d_config,
              libxl_domain_build_info *info, libxl__domain_build_state *state);
 _hidden int libxl__build_hvm(libxl__gc *gc, uint32_t domid,
               libxl_domain_config *d_config,
diff --git a/tools/libxl/libxl_x86.c b/tools/libxl/libxl_x86.c
index d82013f..3331cc5 100644
--- a/tools/libxl/libxl_x86.c
+++ b/tools/libxl/libxl_x86.c
@@ -525,6 +525,9 @@ int libxl__arch_domain_construct_memmap(libxl__gc *gc,
     uint32_t lowmem_start = dom->device_model ? GUEST_LOW_MEM_START_DEFAULT : 
0;
     unsigned page_size = XC_DOM_PAGE_SIZE(dom);
 
+    if (d_config->b_info.type == LIBXL_DOMAIN_TYPE_PV)
+        return 0;
+
     /* Add all rdm entries. */
     for (i = 0; i < d_config->num_rdms; i++)
         if (d_config->rdms[i].policy != LIBXL_RDM_RESERVE_POLICY_INVALID)
-- 
1.8.3.1


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