diff --git a/docs/components/realm-management-extension.rst b/docs/components/realm-management-extension.rst
index ea921fc..6fc0c2e 100644
--- a/docs/components/realm-management-extension.rst
+++ b/docs/components/realm-management-extension.rst
@@ -95,66 +95,218 @@
 This section describes how you can build and run TF-A with RME enabled.
 We assume you have all the :ref:`Prerequisites` to build TF-A.
 
-To enable RME, you need to set the ENABLE_RME build flag when building
-TF-A. Currently, this feature is only supported for the FVP platform.
-
 The following instructions show you how to build and run TF-A with RME
-for two scenarios: TF-A with TF-A Tests, and four-world execution with
-Hafnium and TF-A Tests. The instructions assume you have already obtained
-TF-A. You can use the following command to clone TF-A.
+for two scenarios:
 
-.. code:: shell
+- Three-world execution: TF-A with TF-A Tests or Linux.
 
- git clone https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git
+  - NS (TF-A Test or Linux),
+  - Root (TF-A)
+  - Realm (RMM or TRP)
+
+- Four-world execution: TF-A, Hafnium and TF-A Tests or Linux.
+
+  - NS (TF-A Test or Linux),
+  - Root (TF-A)
+  - Realm (RMM or TRP)
+  - SPM (Hafnium)
 
 To run the tests, you need an FVP model. Please use the :ref:`latest version
 <Arm Fixed Virtual Platforms (FVP)>` of *FVP_Base_RevC-2xAEMvA* model.
 
-.. note::
+Three World Testing with TF-A Tests
+*************************************
 
- ENABLE_RME build option is currently experimental.
+**1. Obtain and build TF-A Tests with Realm Payload**
 
-Building TF-A with TF-A Tests
-********************************************
+The full set of instructions to setup build host and build options for
+TF-A-Tests can be found in the `TFTF Getting Started`_.
+
 Use the following instructions to build TF-A with `TF-A Tests`_ as the
 non-secure payload (BL33).
 
-**1. Obtain and build TF-A Tests**
-
 .. code:: shell
 
  git clone https://git.trustedfirmware.org/TF-A/tf-a-tests.git
  cd tf-a-tests
- make CROSS_COMPILE=aarch64-none-elf- PLAT=fvp DEBUG=1
+ make CROSS_COMPILE=aarch64-none-elf- PLAT=fvp DEBUG=1 all pack_realm
 
-This produces a TF-A Tests binary (*tftf.bin*) in the *build/fvp/debug* directory.
+This produces a TF-A Tests binary (**tftf.bin**) with Realm payload packaged
+and **sp_layout.json** in the **build/fvp/debug** directory.
 
-**2. Build TF-A**
+**2. Obtain and build RMM Image**
+
+Please refer to the `RMM Getting Started`_ on how to setup
+Host Environment and build RMM.
+
+The below command shows how to build RMM using the default build options for FVP.
 
 .. code:: shell
 
+ git clone --recursive https://git.trustedfirmware.org/TF-RMM/tf-rmm.git
+ cd tf-rmm
+ cmake -DRMM_CONFIG=fvp_defcfg -S . -B build
+ cmake --build build
+
+This will generate **rmm.img** in **build** folder.
+
+**3. Build TF-A**
+
+The `TF-A Getting Started`_ has the necessary instructions to setup Host
+machine and build TF-A.
+
+To build for RME, set ``ENABLE_RME`` build option to 1 and provide the path to
+the RMM binary using the ``RMM`` build option.
+Currently, this feature is only supported for the FVP platform.
+
+.. note::
+
+ ENABLE_RME build option is currently experimental.
+
+If the ``RMM`` option is not used, then the Test Realm Payload (TRP) in TF-A
+will be built and used as the RMM.
+
+.. code:: shell
+
+ git clone https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git
  cd trusted-firmware-a
  make CROSS_COMPILE=aarch64-none-elf- \
  PLAT=fvp \
  ENABLE_RME=1 \
+ RMM=<path/to/rmm.img> \
  FVP_HW_CONFIG_DTS=fdts/fvp-base-gicv3-psci-1t.dts \
  DEBUG=1 \
  BL33=<path/to/tftf.bin> \
  all fip
 
+This produces **bl1.bin** and **fip.bin** binaries in the **build/fvp/debug** directory.
+
+Running the tests for a 3 world FVP setup
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Use the following command to run the tests on FVP. TF-A Tests should boot
+and run the default tests including Realm world tests.
+
+.. code:: shell
+
+ FVP_Base_RevC-2xAEMvA                                          \
+ -C bp.refcounter.non_arch_start_at_default=1                   \
+ -C bp.secureflashloader.fname=<path/to/bl1.bin>                \
+ -C bp.flashloader0.fname=<path/to/fip.bin>                     \
+ -C bp.refcounter.use_real_time=0                               \
+ -C bp.ve_sysregs.exit_on_shutdown=1                            \
+ -C cache_state_modelled=1                                      \
+ -C bp.dram_size=2                                              \
+ -C bp.secure_memory=1                                          \
+ -C pci.pci_smmuv3.mmu.SMMU_ROOT_IDR0=3                         \
+ -C pci.pci_smmuv3.mmu.SMMU_ROOT_IIDR=0x43B                     \
+ -C pci.pci_smmuv3.mmu.root_register_page_offset=0x20000        \
+ -C cluster0.NUM_CORES=4                                        \
+ -C cluster0.PA_SIZE=48                                         \
+ -C cluster0.ecv_support_level=2                                \
+ -C cluster0.gicv3.cpuintf-mmap-access-level=2                  \
+ -C cluster0.gicv3.without-DS-support=1                         \
+ -C cluster0.gicv4.mask-virtual-interrupt=1                     \
+ -C cluster0.has_arm_v8-6=1                                     \
+ -C cluster0.has_amu=1                                          \
+ -C cluster0.has_branch_target_exception=1                      \
+ -C cluster0.rme_support_level=2                                \
+ -C cluster0.has_rndr=1                                         \
+ -C cluster0.has_v8_7_pmu_extension=2                           \
+ -C cluster0.max_32bit_el=-1                                    \
+ -C cluster0.stage12_tlb_size=1024                              \
+ -C cluster0.check_memory_attributes=0                          \
+ -C cluster0.ish_is_osh=1                                       \
+ -C cluster0.restriction_on_speculative_execution=2             \
+ -C cluster0.restriction_on_speculative_execution_aarch32=2     \
+ -C cluster1.NUM_CORES=4                                        \
+ -C cluster1.PA_SIZE=48                                         \
+ -C cluster1.ecv_support_level=2                                \
+ -C cluster1.gicv3.cpuintf-mmap-access-level=2                  \
+ -C cluster1.gicv3.without-DS-support=1                         \
+ -C cluster1.gicv4.mask-virtual-interrupt=1                     \
+ -C cluster1.has_arm_v8-6=1                                     \
+ -C cluster1.has_amu=1                                          \
+ -C cluster1.has_branch_target_exception=1                      \
+ -C cluster1.rme_support_level=2                                \
+ -C cluster1.has_rndr=1                                         \
+ -C cluster1.has_v8_7_pmu_extension=2                           \
+ -C cluster1.max_32bit_el=-1                                    \
+ -C cluster1.stage12_tlb_size=1024                              \
+ -C cluster1.check_memory_attributes=0                          \
+ -C cluster1.ish_is_osh=1                                       \
+ -C cluster1.restriction_on_speculative_execution=2             \
+ -C cluster1.restriction_on_speculative_execution_aarch32=2     \
+ -C pctl.startup=0.0.0.0                                        \
+ -C bp.smsc_91c111.enabled=1                                    \
+ -C bp.hostbridge.userNetworking=1
+
+The bottom of the output from *uart0* should look something like the following.
+
+.. code-block:: shell
+
+ ...
+
+ > Test suite 'FF-A Interrupt'
+                                                                Passed
+ > Test suite 'SMMUv3 tests'
+                                                                Passed
+ > Test suite 'PMU Leakage'
+                                                                Passed
+ > Test suite 'DebugFS'
+                                                                Passed
+ > Test suite 'RMI and SPM tests'
+                                                                Passed
+ > Test suite 'Realm payload at EL1'
+                                                                Passed
+ > Test suite 'Invalid memory access'
+                                                                Passed
+ ...
+
+Building TF-A with RME enabled Linux Kernel
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If an RME enabled Linux kernel and filesystem is available for testing,
+and a suitable NS boot loader is not available, then this option can be used to
+launch kernel directly after BL31:
+
+.. code-block:: shell
+
+ cd trusted-firmware-a
+ make CROSS_COMPILE=aarch64-none-elf- \
+ PLAT=fvp \
+ ENABLE_RME=1 \
+ RMM=<path/to/rmm.img> \
+ FVP_HW_CONFIG_DTS=fdts/fvp-base-gicv3-psci-1t.dts \
+ DEBUG=1 \
+ ARM_LINUX_KERNEL_AS_BL33=1 \
+ PRELOADED_BL33_BASE=0x84000000 \
+ all fip
+
+Boot and run the RME enabled Linux Kernel
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Use the following additional arguments to boot the kernel on FVP.
+
+.. code-block:: shell
+
+ --data cluster0.cpu0=<path_to_kernel_Image>@0x84000000         \
+ -C bp.virtioblockdevice.image_path=<path_to_rootfs.ext4>
+
-This produces *bl1.bin* and *fip.bin* binaries in the *build/fvp/debug* directory.
-The above command also builds TRP. The TRP binary is packaged in *fip.bin*.
+.. tip::
+
+ Set the FVP option `cache_state_modelled=0` to run Linux based tests much faster.
 
 Four-world execution with Hafnium and TF-A Tests
-****************************************************
-Four-world execution involves software components at each security state: root,
+*************************************************
+
+Four-world execution involves software components in each security state: root,
 secure, realm and non-secure. This section describes how to build TF-A
-with four-world support. We use TF-A as the root firmware, `Hafnium`_ as the
-secure component, TRP as the realm-world firmware and TF-A Tests as the
-non-secure payload.
+with four-world support.
 
-Before building TF-A, you first need to build the other software components.
-You can find instructions on how to get and build TF-A Tests above.
+We use TF-A as the root firmware, `Hafnium SPM`_ is the reference Secure world component
+and the software components for the other 2 worlds (Realm and Non-Secure)
+are as described in the previous section.
 
 **1. Obtain and build Hafnium**
 
@@ -164,6 +316,27 @@
  cd hafnium
  #  Use the default prebuilt LLVM/clang toolchain
  PATH=$PWD/prebuilts/linux-x64/clang/bin:$PWD/prebuilts/linux-x64/dtc:$PATH
+
+Feature MTE needs to be disabled in Hafnium build, apply following patch to
+project/reference submodule
+
+.. code:: diff
+
+ diff --git a/BUILD.gn b/BUILD.gn
+ index cc6a78f..234b20a 100644
+ --- a/BUILD.gn
+ +++ b/BUILD.gn
+ @@ -83,7 +83,6 @@ aarch64_toolchains("secure_aem_v8a_fvp") {
+     pl011_base_address = "0x1c090000"
+     smmu_base_address = "0x2b400000"
+     smmu_memory_size = "0x100000"
+ -    enable_mte = "1"
+     plat_log_level = "LOG_LEVEL_INFO"
+   }
+ }
+
+.. code:: shell
+
  make PROJECT=reference
 
 The Hafnium binary should be located at
@@ -173,6 +346,8 @@
 
 Build TF-A with RME as well as SPM enabled.
 
+Use sp_layout.json previously generated in tf-a-test build.
+
 .. code:: shell
 
  make CROSS_COMPILE=aarch64-none-elf- \
@@ -184,92 +359,33 @@
  BRANCH_PROTECTION=1 \
  CTX_INCLUDE_PAUTH_REGS=1 \
  DEBUG=1 \
- SP_LAYOUT_FILE=<path/to/tf-a-tests>/build/fvp/debug/sp_layout.json> \
+ SP_LAYOUT_FILE=<path/to/sp_layout.json> \
  BL32=<path/to/hafnium.bin> \
  BL33=<path/to/tftf.bin> \
+ RMM=<path/to/rmm.img> \
  all fip
 
-Running the tests
-*********************
-Use the following command to run the tests on FVP. TF-A Tests should boot
-and run the default tests including RME tests.
+Running the tests for a 4 world FVP setup
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-.. code:: shell
-
- FVP_Base_RevC-2xAEMvA \
- -C bp.flashloader0.fname=<path/to/fip.bin> \
- -C bp.secureflashloader.fname=<path/to/bl1.bin> \
- -C bp.refcounter.non_arch_start_at_default=1 \
- -C bp.refcounter.use_real_time=0 \
- -C bp.ve_sysregs.exit_on_shutdown=1 \
- -C cache_state_modelled=1 \
- -C cluster0.NUM_CORES=4 \
- -C cluster0.PA_SIZE=48 \
- -C cluster0.ecv_support_level=2 \
- -C cluster0.gicv3.cpuintf-mmap-access-level=2 \
- -C cluster0.gicv3.without-DS-support=1 \
- -C cluster0.gicv4.mask-virtual-interrupt=1 \
- -C cluster0.has_arm_v8-6=1 \
- -C cluster0.has_branch_target_exception=1 \
- -C cluster0.has_rme=1 \
- -C cluster0.has_rndr=1 \
- -C cluster0.has_amu=1 \
- -C cluster0.has_v8_7_pmu_extension=2 \
- -C cluster0.max_32bit_el=-1 \
- -C cluster0.restriction_on_speculative_execution=2 \
- -C cluster0.restriction_on_speculative_execution_aarch32=2 \
- -C cluster1.NUM_CORES=4 \
- -C cluster1.PA_SIZE=48 \
- -C cluster1.ecv_support_level=2 \
- -C cluster1.gicv3.cpuintf-mmap-access-level=2 \
- -C cluster1.gicv3.without-DS-support=1 \
- -C cluster1.gicv4.mask-virtual-interrupt=1 \
- -C cluster1.has_arm_v8-6=1 \
- -C cluster1.has_branch_target_exception=1 \
- -C cluster1.has_rme=1 \
- -C cluster1.has_rndr=1 \
- -C cluster1.has_amu=1 \
- -C cluster1.has_v8_7_pmu_extension=2 \
- -C cluster1.max_32bit_el=-1 \
- -C cluster1.restriction_on_speculative_execution=2 \
- -C cluster1.restriction_on_speculative_execution_aarch32=2 \
- -C pci.pci_smmuv3.mmu.SMMU_AIDR=2 \
- -C pci.pci_smmuv3.mmu.SMMU_IDR0=0x0046123B \
- -C pci.pci_smmuv3.mmu.SMMU_IDR1=0x00600002 \
- -C pci.pci_smmuv3.mmu.SMMU_IDR3=0x1714 \
- -C pci.pci_smmuv3.mmu.SMMU_IDR5=0xFFFF0475 \
- -C pci.pci_smmuv3.mmu.SMMU_S_IDR1=0xA0000002 \
- -C pci.pci_smmuv3.mmu.SMMU_S_IDR2=0 \
- -C pci.pci_smmuv3.mmu.SMMU_S_IDR3=0 \
- -C bp.pl011_uart0.out_file=uart0.log \
- -C bp.pl011_uart1.out_file=uart1.log \
- -C bp.pl011_uart2.out_file=uart2.log \
- -C pctl.startup=0.0.0.0 \
- -Q 1000 \
- "$@"
+Use the following arguments in addition to
+`Running the tests for a 3 world FVP setup`_ to run tests for 4 world setup.
 
-The bottom of the output from *uart0* should look something like the following.
-
-.. code-block:: shell
-
- ...
-
- > Test suite 'FF-A Interrupt'
-                                                                Passed
- > Test suite 'SMMUv3 tests'
-                                                                Passed
- > Test suite 'PMU Leakage'
-                                                                Passed
- > Test suite 'DebugFS'
-                                                                Passed
- > Test suite 'Realm payload tests'
-                                                                Passed
- > Test suite 'Invalid memory access'
-                                                                Passed
- ...
+.. code:: shell
 
+ -C pci.pci_smmuv3.mmu.SMMU_AIDR=2              \
+ -C pci.pci_smmuv3.mmu.SMMU_IDR0=0x0046123B     \
+ -C pci.pci_smmuv3.mmu.SMMU_IDR1=0x00600002     \
+ -C pci.pci_smmuv3.mmu.SMMU_IDR3=0x1714         \
+ -C pci.pci_smmuv3.mmu.SMMU_IDR5=0xFFFF0475     \
+ -C pci.pci_smmuv3.mmu.SMMU_S_IDR1=0xA0000002   \
+ -C pci.pci_smmuv3.mmu.SMMU_S_IDR2=0            \
+ -C pci.pci_smmuv3.mmu.SMMU_S_IDR3=0
 
 .. _Arm Confidential Compute Architecture (Arm CCA): https://www.arm.com/why-arm/architecture/security-features/arm-confidential-compute-architecture
 .. _Arm Architecture Models website: https://developer.arm.com/tools-and-software/simulation-models/fixed-virtual-platforms/arm-ecosystem-models
+.. _TF-A Getting Started: https://trustedfirmware-a.readthedocs.io/en/latest/getting_started/index.html
 .. _TF-A Tests: https://trustedfirmware-a-tests.readthedocs.io/en/latest
-.. _Hafnium: https://www.trustedfirmware.org/projects/hafnium
+.. _TFTF Getting Started: https://trustedfirmware-a-tests.readthedocs.io/en/latest/getting_started/index.html
+.. _Hafnium SPM: https://www.trustedfirmware.org/projects/hafnium
+.. _RMM Getting Started: https://git.trustedfirmware.org/TF-RMM/tf-rmm.git/tree/docs/getting_started/index.rst