doc: move DM memory setup to GSG

DM memory allocation mechanism is better placed in the Getting Started
material, so move it there from the primer.

Signed-off-by: David B. Kinder <david.b.kinder@intel.com>

doc/getting_started/index.rst

@@ -311,6 +311,42 @@ Set up Reference UOS
       :name: gsg-successful-boot
 
 
+Device Manager memory allocation mechanism
+==========================================
+
+There are two Device Manager memory allocation mechanisms available:
+
+- Contiguous Memory Allocator (CMA), and 
+- Huge Page Tables (HugeTLB).  HugeTLB is the default.
+
+To choose CMA, do the following:
+
+1) Add ``cma=reserved_mem_size@recommend_memory_offset-0``, (for example
+   ``cma=2560M@0x100000000-0``) to the SOS cmdline in ``acrn.conf``
+
+2) Start ``acrn-dm`` *without* the ``-T`` option
+
+To support HugeTLB, do the following:
+
+1) Do huge page reservation
+
+   - For 1G huge page reservation, add ``hugepagesz=1G hugepages=reserved_pg_num``
+     (for example, ``hugepagesz=1G hugepages=4``) to the SOS cmdline in
+     ``acrn.conf`` (for EFI)
+
+   - For 2M huge page reservation, after the SOS starts up, run the
+     command::
+
+        echo reserved_pg_num > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
+
+   .. note::
+      You can use 2M reserving method to do reservation for 1G page size, but it
+      may fail.  For an EFI platform, you may skip 1G page reservation
+      by using a 2M page, but make sure your huge page reservation size is
+      large enough for your usage.
+
+2)  Start ``acrn-dm`` *with* the ``-T`` option.
+
 Build ACRN from Source
 **********************
 

doc/primer/index.rst

@@ -936,40 +936,3 @@ or
 .. code-block:: bash
 
    screen /dev/pts/0
-
-
-Device Manager memory allocation mechanism
-******************************************
-
-There are two Device Manager memory allocation mechanisms available:
-
-- Contiguous Memory Allocator (CMA), and 
-- Huge Page Tables (HugeTLB).  HugeTLB is the default.
-
-To choose CMA, do the following:
-
-1) Add ``cma=reserved_mem_size@recommend_memory_offset-0``, (for example
-   ``cma=2560M@0x100000000-0``) to the SOS cmdline in ``acrn.conf``
-
-2) Start ``acrn-dm`` *without* the ``-T`` option
-
-To support HugeTLB, do the following:
-
-1) Do huge page reservation
-
-   - For 1G huge page reservation, add ``hugepagesz=1G hugepages=reserved_pg_num``
-     (for example, ``hugepagesz=1G hugepages=4``) to the SOS cmdline in
-     ``acrn.conf`` (for EFI)
-
-   - For 2M huge page reservation, after the SOS starts up, run the
-     command::
-
-        echo reserved_pg_num > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
-
-   .. note::
-      You can use 2M reserving method to do reservation for 1G page size, but it
-      may fail.  For an EFI platform, you may skip 1G page reservation
-      by using a 2M page, but make sure your huge page reservation size is
-      large enough for your usage.
-
-2)  Start ``acrn-dm`` *with* the ``-T`` option.