[v4][PATCH 7/9] tools:firmware:hvmloader: introduce hypercall for xc_reserved_device_memory_map

[Tiejun Chen <tiejun.chen@intel.com>]

We will introduce that hypercall xc_reserved_device_memory_map
to hvmloader.

Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>
---
 tools/firmware/hvmloader/util.c | 22 ++++++++++++++++++++++
 tools/firmware/hvmloader/util.h | 11 +++++++++++
 2 files changed, 33 insertions(+)

diff --git a/tools/firmware/hvmloader/util.c b/tools/firmware/hvmloader/util.c
index 80d822f..5d656f1 100644
--- a/tools/firmware/hvmloader/util.c
+++ b/tools/firmware/hvmloader/util.c
@@ -828,6 +828,28 @@ int hpet_exists(unsigned long hpet_base)
     return ((hpet_id >> 16) == 0x8086);
 }
 
+int get_reserved_device_memory_map(struct reserved_device_memory *entries,
+                                   uint32_t max_entries)
+{
+    static int map_done = 0;
+    struct xen_reserved_device_memory_map memmap = {
+        .nr_entries = max_entries
+    };
+
+    if ( map_done )
+        return 0;
+
+    set_xen_guest_handle(memmap.buffer, entries);
+
+    if ( hypercall_memory_op(XENMEM_reserved_device_memory_map,
+                             &memmap) != 0 )
+        BUG();
+
+    map_done = 1;
+
+    return 0;
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/tools/firmware/hvmloader/util.h b/tools/firmware/hvmloader/util.h
index a70e4aa..b6ca739 100644
--- a/tools/firmware/hvmloader/util.h
+++ b/tools/firmware/hvmloader/util.h
@@ -241,6 +241,17 @@ int build_e820_table(struct e820entry *e820,
                      unsigned int bios_image_base);
 void dump_e820_table(struct e820entry *e820, unsigned int nr);
 
+
+struct reserved_device_memory {
+    /* PFN of the current mapping of the page. */
+    unsigned int pfn;
+    /* Number of the current mapping pages. */
+    unsigned int count;
+};
+typedef struct reserved_device_memory reserved_device_memory_t;
+
+int get_reserved_device_memory_map(struct reserved_device_memory *entries,
+                                   uint32_t max_entries);
 #ifndef NDEBUG
 void perform_tests(void);
 #else
-- 
1.9.1