diff --git a/misc/config_tools/data/cfl-k700-i7/hybrid.xml b/misc/config_tools/data/cfl-k700-i7/hybrid.xml
index cf0ff18fe..2c30854da 100644
--- a/misc/config_tools/data/cfl-k700-i7/hybrid.xml
+++ b/misc/config_tools/data/cfl-k700-i7/hybrid.xml
@@ -38,7 +38,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/cfl-k700-i7/hybrid_rt.xml b/misc/config_tools/data/cfl-k700-i7/hybrid_rt.xml
index e8c7482ff..aef54ffde 100644
--- a/misc/config_tools/data/cfl-k700-i7/hybrid_rt.xml
+++ b/misc/config_tools/data/cfl-k700-i7/hybrid_rt.xml
@@ -43,7 +43,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x800000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/cfl-k700-i7/partitioned.xml b/misc/config_tools/data/cfl-k700-i7/partitioned.xml
index f7000e3ce..99039b085 100644
--- a/misc/config_tools/data/cfl-k700-i7/partitioned.xml
+++ b/misc/config_tools/data/cfl-k700-i7/partitioned.xml
@@ -38,7 +38,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/cfl-k700-i7/shared.xml b/misc/config_tools/data/cfl-k700-i7/shared.xml
index 8438047b0..cd6f5e3e7 100644
--- a/misc/config_tools/data/cfl-k700-i7/shared.xml
+++ b/misc/config_tools/data/cfl-k700-i7/shared.xml
@@ -30,7 +30,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x800000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/generic_board/hybrid.xml b/misc/config_tools/data/generic_board/hybrid.xml
index 43dbab68a..ee33610f4 100644
--- a/misc/config_tools/data/generic_board/hybrid.xml
+++ b/misc/config_tools/data/generic_board/hybrid.xml
@@ -38,7 +38,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/generic_board/hybrid_rt.xml b/misc/config_tools/data/generic_board/hybrid_rt.xml
index e6ae516cc..422f5e6c3 100644
--- a/misc/config_tools/data/generic_board/hybrid_rt.xml
+++ b/misc/config_tools/data/generic_board/hybrid_rt.xml
@@ -56,7 +56,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/generic_board/partitioned.xml b/misc/config_tools/data/generic_board/partitioned.xml
index c2ce05b25..2b4b279bc 100644
--- a/misc/config_tools/data/generic_board/partitioned.xml
+++ b/misc/config_tools/data/generic_board/partitioned.xml
@@ -38,7 +38,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/generic_board/shared.xml b/misc/config_tools/data/generic_board/shared.xml
index 29a1d6398..962ae2fd6 100644
--- a/misc/config_tools/data/generic_board/shared.xml
+++ b/misc/config_tools/data/generic_board/shared.xml
@@ -38,7 +38,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/nuc11tnbi5/hybrid.xml b/misc/config_tools/data/nuc11tnbi5/hybrid.xml
index 280c44585..dce873ae5 100644
--- a/misc/config_tools/data/nuc11tnbi5/hybrid.xml
+++ b/misc/config_tools/data/nuc11tnbi5/hybrid.xml
@@ -38,7 +38,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/nuc11tnbi5/partitioned.xml b/misc/config_tools/data/nuc11tnbi5/partitioned.xml
index 87c768ba4..ac9ddb6d4 100644
--- a/misc/config_tools/data/nuc11tnbi5/partitioned.xml
+++ b/misc/config_tools/data/nuc11tnbi5/partitioned.xml
@@ -38,7 +38,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/nuc11tnbi5/shared.xml b/misc/config_tools/data/nuc11tnbi5/shared.xml
index 1c89abbf9..457cded76 100644
--- a/misc/config_tools/data/nuc11tnbi5/shared.xml
+++ b/misc/config_tools/data/nuc11tnbi5/shared.xml
@@ -38,7 +38,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/qemu/shared.xml b/misc/config_tools/data/qemu/shared.xml
index 4555a5deb..64cec7009 100644
--- a/misc/config_tools/data/qemu/shared.xml
+++ b/misc/config_tools/data/qemu/shared.xml
@@ -31,7 +31,6 @@
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
       <HV_RAM_START>0x11000000</HV_RAM_START>
-      <PLATFORM_RAM_SIZE>0x100000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/hybrid.xml b/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/hybrid.xml
index a40644b18..e209d2d44 100644
--- a/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/hybrid.xml
+++ b/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/hybrid.xml
@@ -38,7 +38,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/partitioned.xml b/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/partitioned.xml
index 1124136fb..b4e680393 100644
--- a/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/partitioned.xml
+++ b/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/partitioned.xml
@@ -38,7 +38,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/shared.xml b/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/shared.xml
index 123698b53..b55f0b148 100644
--- a/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/shared.xml
+++ b/misc/config_tools/data/tgl-vecow-spc-7100-Corei7/shared.xml
@@ -38,7 +38,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/whl-ipc-i5/hybrid.xml b/misc/config_tools/data/whl-ipc-i5/hybrid.xml
index 970e87a68..f7213342e 100644
--- a/misc/config_tools/data/whl-ipc-i5/hybrid.xml
+++ b/misc/config_tools/data/whl-ipc-i5/hybrid.xml
@@ -30,7 +30,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/whl-ipc-i5/hybrid_rt.xml b/misc/config_tools/data/whl-ipc-i5/hybrid_rt.xml
index cfd67d090..31fdbebd4 100644
--- a/misc/config_tools/data/whl-ipc-i5/hybrid_rt.xml
+++ b/misc/config_tools/data/whl-ipc-i5/hybrid_rt.xml
@@ -43,7 +43,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/whl-ipc-i5/partitioned.xml b/misc/config_tools/data/whl-ipc-i5/partitioned.xml
index 26476df56..ace31c468 100644
--- a/misc/config_tools/data/whl-ipc-i5/partitioned.xml
+++ b/misc/config_tools/data/whl-ipc-i5/partitioned.xml
@@ -30,7 +30,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/whl-ipc-i5/sdc.xml b/misc/config_tools/data/whl-ipc-i5/sdc.xml
index 8b03f6241..f36f90c11 100644
--- a/misc/config_tools/data/whl-ipc-i5/sdc.xml
+++ b/misc/config_tools/data/whl-ipc-i5/sdc.xml
@@ -30,7 +30,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/data/whl-ipc-i5/shared.xml b/misc/config_tools/data/whl-ipc-i5/shared.xml
index 145ef9454..cd5c57cb0 100644
--- a/misc/config_tools/data/whl-ipc-i5/shared.xml
+++ b/misc/config_tools/data/whl-ipc-i5/shared.xml
@@ -30,7 +30,6 @@
     </FEATURES>
     <MEMORY>
       <STACK_SIZE>0x2000</STACK_SIZE>
-      <PLATFORM_RAM_SIZE>0x400000000</PLATFORM_RAM_SIZE>
     </MEMORY>
     <CAPACITIES>
       <MAX_VM_NUM>16</MAX_VM_NUM>
diff --git a/misc/config_tools/hv_config/board_defconfig.py b/misc/config_tools/hv_config/board_defconfig.py
index 436e2040c..31b1e6390 100644
--- a/misc/config_tools/hv_config/board_defconfig.py
+++ b/misc/config_tools/hv_config/board_defconfig.py
@@ -108,7 +108,6 @@ def get_memory(hv_info, config):
     else:
         print("CONFIG_HV_RAM_START={}".format(hv_info.mem.hv_ram_start), file=config)
 
-    print("CONFIG_PLATFORM_RAM_SIZE={}".format(hv_info.mem.platform_ram_size), file=config)
     print("CONFIG_STACK_SIZE={}".format(hv_info.mem.stack_size), file=config)
     print("CONFIG_IVSHMEM_ENABLED={}".format(hv_info.mem.ivshmem_enable), file=config)
 
diff --git a/misc/config_tools/hv_config/hv_item.py b/misc/config_tools/hv_config/hv_item.py
index 3ee0a4228..4d08d611d 100644
--- a/misc/config_tools/hv_config/hv_item.py
+++ b/misc/config_tools/hv_config/hv_item.py
@@ -126,7 +126,6 @@ class Memory:
         self.hv_file = hv_file
         self.stack_size = 0
         self.hv_ram_start = 0
-        self.platform_ram_size = 0
         self.sos_ram_size = 0
         self.uos_ram_size = 0
         self.ivshmem_enable = 'n'
@@ -135,14 +134,12 @@ class Memory:
     def get_info(self):
         self.stack_size = common.get_hv_item_tag(self.hv_file, "MEMORY", "STACK_SIZE")
         self.hv_ram_start = common.get_hv_item_tag(self.hv_file, "MEMORY", "HV_RAM_START")
-        self.platform_ram_size = common.get_hv_item_tag(self.hv_file, "MEMORY", "PLATFORM_RAM_SIZE")
         self.ivshmem_enable = common.get_hv_item_tag(self.hv_file, "FEATURES", "IVSHMEM", "IVSHMEM_ENABLED")
         self.ivshmem_region = common.get_hv_item_tag(self.hv_file, "FEATURES", "IVSHMEM", "IVSHMEM_REGION")
 
     def check_item(self):
         hv_cfg_lib.hv_size_check(self.stack_size, "MEMORY", "STACK_SIZE")
         hv_cfg_lib.hv_ram_start_check(self.hv_ram_start, "MEMORY", "HV_RAM_START")
-        hv_cfg_lib.hv_size_check(self.platform_ram_size, "MEMORY", "PLATFORM_RAM_SIZE")
         hv_cfg_lib.ny_support_check(self.ivshmem_enable, "FEATURES", "IVSHMEM", "IVSHMEM_ENABLED")
 
 
diff --git a/misc/config_tools/schema/checks/.pre_launched_vm_support.xsd.swp b/misc/config_tools/schema/checks/.pre_launched_vm_support.xsd.swp
new file mode 100644
index 000000000..11b99d10a
Binary files /dev/null and b/misc/config_tools/schema/checks/.pre_launched_vm_support.xsd.swp differ
diff --git a/misc/config_tools/schema/config.xsd b/misc/config_tools/schema/config.xsd
index a99967dd8..2f8f5cfc4 100644
--- a/misc/config_tools/schema/config.xsd
+++ b/misc/config_tools/schema/config.xsd
@@ -177,12 +177,6 @@ three for specific exceptions.</xs:documentation>
 the RAM region used by the hypervisor.</xs:documentation>
       </xs:annotation>
     </xs:element>
-    <xs:element name="PLATFORM_RAM_SIZE" type="HexFormat" default="0x400000000">
-      <xs:annotation>
-        <xs:documentation>Size of the physical platform RAM. Default
-value ``0x400000000``.</xs:documentation>
-      </xs:annotation>
-    </xs:element>
   </xs:all>
 </xs:complexType>
 
diff --git a/misc/config_tools/xforms/config_common.xsl b/misc/config_tools/xforms/config_common.xsl
index 34966ea09..b89d9d6ec 100644
--- a/misc/config_tools/xforms/config_common.xsl
+++ b/misc/config_tools/xforms/config_common.xsl
@@ -151,10 +151,6 @@
       <xsl:with-param name="default" select="//allocation-data/acrn-config/hv/MEMORY/HV_RAM_START" />
     </xsl:call-template>
 
-    <xsl:call-template name="integer-by-key">
-      <xsl:with-param name="key" select="'PLATFORM_RAM_SIZE'" />
-    </xsl:call-template>
-
     <xsl:call-template name="integer-by-key">
       <xsl:with-param name="key" select="'STACK_SIZE'" />
     </xsl:call-template>