diff --git a/grub-core/kern/mm.c b/grub-core/kern/mm.c
index e859772ab..75f6eacbe 100644
--- a/grub-core/kern/mm.c
+++ b/grub-core/kern/mm.c
@@ -28,6 +28,9 @@
   - multiple regions may be used as free space. They may not be
   contiguous.
 
+  - if existing regions are insufficient to satisfy an allocation, a new
+  region can be requested from firmware.
+
   Regions are managed by a singly linked list, and the meta information is
   stored in the beginning of each region. Space after the meta information
   is used to allocate memory.
@@ -81,6 +84,7 @@
 
 
 grub_mm_region_t grub_mm_base;
+grub_mm_add_region_func_t grub_mm_add_region_fn;
 
 /* Get a header from the pointer PTR, and set *P and *R to a pointer
    to the header and a pointer to its region, respectively. PTR must
@@ -444,6 +448,32 @@ grub_memalign (grub_size_t align, grub_size_t size)
       count++;
       goto again;
 
+    case 1:
+      /* Request additional pages, contiguous */
+      count++;
+
+      if (grub_mm_add_region_fn != NULL &&
+          grub_mm_add_region_fn (size, GRUB_MM_ADD_REGION_CONSECUTIVE) == GRUB_ERR_NONE)
+	goto again;
+
+      /* fallthrough  */
+
+    case 2:
+      /* Request additional pages, anything at all */
+      count++;
+
+      if (grub_mm_add_region_fn != NULL)
+        {
+          /*
+           * Try again even if this fails, in case it was able to partially
+           * satisfy the request
+           */
+          grub_mm_add_region_fn (size, GRUB_MM_ADD_REGION_NONE);
+          goto again;
+        }
+
+      /* fallthrough */
+
     default:
       break;
     }
diff --git a/include/grub/mm.h b/include/grub/mm.h
index 44fde7cb9..f3bf87fa0 100644
--- a/include/grub/mm.h
+++ b/include/grub/mm.h
@@ -20,6 +20,7 @@
 #ifndef GRUB_MM_H
 #define GRUB_MM_H	1
 
+#include <grub/err.h>
 #include <grub/types.h>
 #include <grub/symbol.h>
 #include <config.h>
@@ -28,6 +29,23 @@
 # define NULL	((void *) 0)
 #endif
 
+#define GRUB_MM_ADD_REGION_NONE        0
+#define GRUB_MM_ADD_REGION_CONSECUTIVE (1 << 0)
+
+/*
+ * Function used to request memory regions of `grub_size_t` bytes. The second
+ * parameter is a bitfield of `GRUB_MM_ADD_REGION` flags.
+ */
+typedef grub_err_t (*grub_mm_add_region_func_t) (grub_size_t, unsigned int);
+
+/*
+ * Set this function pointer to enable adding memory-regions at runtime in case
+ * a memory allocation cannot be satisfied with existing regions.
+ */
+#ifndef GRUB_MACHINE_EMU
+extern grub_mm_add_region_func_t EXPORT_VAR(grub_mm_add_region_fn);
+#endif
+
 void grub_mm_init_region (void *addr, grub_size_t size);
 void *EXPORT_FUNC(grub_calloc) (grub_size_t nmemb, grub_size_t size);
 void *EXPORT_FUNC(grub_malloc) (grub_size_t size);