diff --git a/arch/x86/guest/guest.c b/arch/x86/guest/guest.c
index 59bc93d87..3ad100043 100644
--- a/arch/x86/guest/guest.c
+++ b/arch/x86/guest/guest.c
@@ -341,54 +341,6 @@ int prepare_vm0_memmap_and_e820(struct vm *vm)
 	return 0;
 }
 
-uint64_t e820_alloc_low_memory(uint32_t size)
-{
-	uint32_t i;
-	struct e820_entry *entry, *new_entry;
-
-	/* We want memory in page boundary and want integral multiple of pages */
-	size = ROUND_PAGE_UP(size);
-
-	for (i = 0; i < e820_entries; i++) {
-		entry = &e820[i];
-		uint64_t start, end, length;
-
-		start = ROUND_PAGE_UP(entry->baseaddr);
-		end = ROUND_PAGE_DOWN(entry->baseaddr + entry->length);
-		length = end - start;
-		length = (end > start) ? (end - start) : 0;
-
-		if ((entry->type != E820_TYPE_RAM)
-			|| (length < size)
-			|| (start >= MEM_1M)
-			|| (start + size > MEM_1M)) {
-			continue;
-		}
-
-		/* Found available memory */
-		e820_mem.total_mem_size -= size;
-
-		/* found exact size of e820 entry */
-		if (length == size) {
-			entry->type = E820_TYPE_RESERVED;
-			return start;
-		}
-
-		/* create a new entry for the allocated memory */
-		new_entry = &e820[e820_entries];
-		new_entry->type = E820_TYPE_RESERVED;
-		new_entry->baseaddr = end - size;
-		new_entry->length = entry->baseaddr + entry->length - new_entry->baseaddr;
-		entry->length -= new_entry->length;
-		e820_entries++;
-
-		return new_entry->baseaddr;
-	}
-
-	pr_fatal("Can't allocate memory under 1M from E820\n");
-	return ACRN_INVALID_HPA;
-}
-
 /*******************************************************************
  *         GUEST initial page table
  *
diff --git a/bsp/sbl/include/bsp/bsp_cfg.h b/bsp/sbl/include/bsp/bsp_cfg.h
index 9721da315..b39dd7d2f 100644
--- a/bsp/sbl/include/bsp/bsp_cfg.h
+++ b/bsp/sbl/include/bsp/bsp_cfg.h
@@ -41,7 +41,7 @@
 #define HEAP_SIZE	0x100000
 #define CONSOLE_LOGLEVEL_DEFAULT	2
 #define MEM_LOGLEVEL_DEFAULT		4
-#define	CONFIG_LOW_RAM_SIZE	0x00010000
+#define	CONFIG_LOW_RAM_SIZE	0x000CF000
 #define	CONFIG_RAM_START	0x6E000000
 #define	CONFIG_RAM_SIZE		0x02000000	/* 32M */
 #define CONFIG_CMA
diff --git a/bsp/uefi/efi/malloc.c b/bsp/uefi/efi/malloc.c
index b5934b48b..879f7d62c 100644
--- a/bsp/uefi/efi/malloc.c
+++ b/bsp/uefi/efi/malloc.c
@@ -164,67 +164,6 @@ fail:
 	return err;
 }
 
-EFI_STATUS emalloc_for_low_mem(EFI_PHYSICAL_ADDRESS *addr, UINTN size)
-{
-	UINTN map_size, map_key, desc_size;
-	EFI_MEMORY_DESCRIPTOR *map_buf;
-	UINTN d, map_end;
-	UINT32 desc_version;
-	EFI_STATUS err;
-	UINTN nr_pages = EFI_SIZE_TO_PAGES(size);
-
-	err = memory_map(&map_buf, &map_size, &map_key,
-			 &desc_size, &desc_version);
-
-   if (err != EFI_SUCCESS)
-		goto fail;
-
-	d = (UINTN)map_buf;
-	map_end = (UINTN)map_buf + map_size;
-
-	for (; d < map_end; d += desc_size) {
-		EFI_MEMORY_DESCRIPTOR *desc;
-		EFI_PHYSICAL_ADDRESS start, end, aligned;
-
-		desc = (EFI_MEMORY_DESCRIPTOR *)d;
-		if (desc->Type != EfiConventionalMemory)
-			continue;
-
-	   if (desc->NumberOfPages < nr_pages)
-			continue;
-
-		start = desc->PhysicalStart;
-		end = start + (desc->NumberOfPages << EFI_PAGE_SHIFT);
-		size = (size + EFI_PAGE_SIZE - 1) & ~(EFI_PAGE_SIZE - 1);
-
-		/* allocate in low memory only */
-		if (start >= 1 << 20)
-			continue;
-
-		if (end > 1 << 20) {
-			size -= end - (1 << 20);
-			end = (1 << 20);
-		}
-
-		if (end - start >= size) {
-			aligned = end - size;
-			err = allocate_pages(AllocateAddress, EfiReservedMemoryType,
-						 nr_pages, &aligned);
-			if (err == EFI_SUCCESS) {
-				*addr = aligned;
-				break;
-			}
-		}
-	}
-
-  if (d == map_end)
-		err = EFI_OUT_OF_RESOURCES;
-
-	free_pool(map_buf);
-fail:
-	return err;
-}
-
 /* FIXME: This function cannot guarantee to return address under 4G,
  * and the hypervisor cannot handle params, which address is above 4G,
  * delivered from efi stub.
diff --git a/bsp/uefi/efi/stdlib.h b/bsp/uefi/efi/stdlib.h
index 0fcf539f6..843dc1fc4 100644
--- a/bsp/uefi/efi/stdlib.h
+++ b/bsp/uefi/efi/stdlib.h
@@ -50,7 +50,6 @@ extern void *calloc(UINTN nmemb, UINTN size);
 
 extern EFI_STATUS emalloc(UINTN, UINTN, EFI_PHYSICAL_ADDRESS *);
 extern EFI_STATUS __emalloc(UINTN, UINTN, EFI_PHYSICAL_ADDRESS *, EFI_MEMORY_TYPE);
-extern EFI_STATUS emalloc_for_low_mem(EFI_PHYSICAL_ADDRESS *addr, UINTN size);
 extern void efree(EFI_PHYSICAL_ADDRESS, UINTN);
 
 static inline void memset(void *dstv, char ch, UINTN size)
diff --git a/include/arch/x86/guest/guest.h b/include/arch/x86/guest/guest.h
index dabeb1e89..f7199a991 100644
--- a/include/arch/x86/guest/guest.h
+++ b/include/arch/x86/guest/guest.h
@@ -68,7 +68,6 @@ struct e820_mem_params {
 };
 
 int prepare_vm0_memmap_and_e820(struct vm *vm);
-uint64_t e820_alloc_low_memory(uint32_t size);
 
 /* Definition for a mem map lookup */
 struct vm_lu_mem_map {