[Xen-devel] [PATCH v2 4/4] libxc: Pass e820 map to PVH guest via hvm_start_info

[Maran Wilson <maran.wilson@xxxxxxxxxx>]

From: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
---
 tools/libxc/xc_dom_x86.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/tools/libxc/xc_dom_x86.c b/tools/libxc/xc_dom_x86.c
index 0b65dab..4f4b26e 100644
--- a/tools/libxc/xc_dom_x86.c
+++ b/tools/libxc/xc_dom_x86.c
@@ -640,6 +640,8 @@ static int alloc_magic_pages_hvm(struct xc_dom_image *dom)
             dom->cmdline_size = ROUNDUP(strlen(dom->cmdline) + 1, 8);
             start_info_size += dom->cmdline_size;
         }
+
+        start_info_size += dom->e820_entries * sizeof(*(dom->e820));
     }
     else
     {
@@ -1666,7 +1668,7 @@ static int bootlate_hvm(struct xc_dom_image *dom)
     uint32_t domid = dom->guest_domid;
     xc_interface *xch = dom->xch;
     struct hvm_start_info *start_info;
-    size_t start_info_size;
+    size_t start_info_size, modsize;
     struct hvm_modlist_entry *modlist;
     unsigned int i;
 
@@ -1693,6 +1695,8 @@ static int bootlate_hvm(struct xc_dom_image *dom)
 
     if ( !dom->device_model )
     {
+        struct hvm_memmap_table_entry *memmap;
+
         if ( dom->cmdline )
         {
             char *cmdline = (void*)(start_info + 1);
@@ -1718,6 +1722,20 @@ static int bootlate_hvm(struct xc_dom_image *dom)
 
         /* ACPI module 0 is the RSDP */
         start_info->rsdp_paddr = dom->acpi_modules[0].guest_addr_out ? : 0;
+
+        modsize = HVMLOADER_MODULE_MAX_COUNT *
+            (sizeof(*modlist) + HVMLOADER_MODULE_CMDLINE_SIZE);
+        memmap = (void*)modlist + modsize;
+
+        start_info->memmap_paddr = (dom->start_info_seg.pfn << PAGE_SHIFT) +
+                            ((uintptr_t)modlist - (uintptr_t)start_info) + 
modsize;
+        start_info->memmap_entries = dom->e820_entries;
+        for ( i = 0; i < dom->e820_entries; i++ )
+        {
+            memmap[i].addr = dom->e820[i].addr;
+            memmap[i].size = dom->e820[i].size;
+            memmap[i].type = dom->e820[i].type;
+        }
     }
     else
     {
@@ -1732,6 +1750,7 @@ static int bootlate_hvm(struct xc_dom_image *dom)
     }
 
     start_info->magic = XEN_HVM_START_MAGIC_VALUE;
+    start_info->version = 1;
 
     munmap(start_info, start_info_size);
 
-- 
1.8.3.1


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