diff --git a/hypervisor/arch/x86/guest/vm.c b/hypervisor/arch/x86/guest/vm.c
index c4125b9be..b3156ad47 100644
--- a/hypervisor/arch/x86/guest/vm.c
+++ b/hypervisor/arch/x86/guest/vm.c
@@ -42,6 +42,7 @@
 #ifdef CONFIG_SECURITY_VM_FIXUP
 #include <quirks/security_vm_fixup.h>
 #endif
+#include <asm/boot/ld_sym.h>
 
 /* Local variables */
 
@@ -409,6 +410,7 @@ static void prepare_service_vm_memmap(struct acrn_vm *vm)
 	uint32_t entries_count = vm->e820_entry_num;
 	const struct e820_entry *p_e820 = vm->e820_entries;
 	struct pci_mmcfg_region *pci_mmcfg;
+	uint64_t trampoline_memory_size = round_page_up((uint64_t)(&ld_trampoline_end - &ld_trampoline_start));
 
 	pr_dbg("Service VM e820 layout:\n");
 	for (i = 0U; i < entries_count; i++) {
@@ -462,7 +464,7 @@ static void prepare_service_vm_memmap(struct acrn_vm *vm)
 	/* unmap AP trampoline code for security
 	 * This buffer is guaranteed to be page aligned.
 	 */
-	ept_del_mr(vm, pml4_page, get_trampoline_start16_paddr(), CONFIG_LOW_RAM_SIZE);
+	ept_del_mr(vm, pml4_page, get_trampoline_start16_paddr(), trampoline_memory_size);
 
 	/* unmap PCIe MMCONFIG region since it's owned by hypervisor */
 	pci_mmcfg = get_mmcfg_region();
diff --git a/hypervisor/arch/x86/trampoline.c b/hypervisor/arch/x86/trampoline.c
index 9729b2307..fc2e1382b 100644
--- a/hypervisor/arch/x86/trampoline.c
+++ b/hypervisor/arch/x86/trampoline.c
@@ -107,22 +107,22 @@ static void update_trampoline_code_refs(uint64_t dest_pa)
 
 uint64_t prepare_trampoline(void)
 {
-	uint64_t size, dest_pa;
+	uint64_t trampline_size, trampoline_pa;
 
-	size = (uint64_t)(&ld_trampoline_end - &ld_trampoline_start);
-	dest_pa = e820_alloc_memory(CONFIG_LOW_RAM_SIZE, MEM_1M);
+	trampline_size = (uint64_t)(&ld_trampoline_end - &ld_trampoline_start);
+	trampoline_pa = e820_alloc_memory(trampline_size, MEM_1M);
 
-	pr_dbg("trampoline code: %lx size %x", dest_pa, size);
+	pr_dbg("trampoline code: %lx trampline_size %x", trampoline_pa, trampline_size);
 
 	/* Copy segment for AP initialization code below 1MB */
-	(void)memcpy_s(hpa2hva(dest_pa), (size_t)size, &ld_trampoline_load,
-			(size_t)size);
-	update_trampoline_code_refs(dest_pa);
+	(void)memcpy_s(hpa2hva(trampoline_pa), (size_t)trampline_size, &ld_trampoline_load,
+			(size_t)trampline_size);
+	update_trampoline_code_refs(trampoline_pa);
 
 	cpu_memory_barrier();
-	flush_cache_range(hpa2hva(dest_pa), size);
+	flush_cache_range(hpa2hva(trampoline_pa), trampline_size);
 
-	trampoline_start16_paddr = dest_pa;
+	trampoline_start16_paddr = trampoline_pa;
 
-	return dest_pa;
+	return trampoline_pa;
 }
diff --git a/hypervisor/bsp/ld/link_ram.ld.in b/hypervisor/bsp/ld/link_ram.ld.in
index a1bb65c56..55f8f82a9 100644
--- a/hypervisor/bsp/ld/link_ram.ld.in
+++ b/hypervisor/bsp/ld/link_ram.ld.in
@@ -3,7 +3,7 @@ ENTRY(cpu_primary_start_32)
 MEMORY
 {
     /* Low 1MB of memory for secondary processor start-up */
-    lowram  :   ORIGIN = 0, LENGTH = CONFIG_LOW_RAM_SIZE
+    lowram  :   ORIGIN = 0, LENGTH = 0x100000
 
     /* 32 MBytes of RAM for HV */
     ram     :   ORIGIN = CONFIG_HV_RAM_START, LENGTH = 0x80000000 - CONFIG_HV_RAM_START