diff --git a/doc/develop.rst b/doc/develop.rst
index 5298fd3be..7325bfb7b 100644
--- a/doc/develop.rst
+++ b/doc/develop.rst
@@ -89,7 +89,6 @@ Advanced Features
    tutorials/acrn-secure-boot-with-efi-stub
    tutorials/pre-launched-rt
    tutorials/enable_ivshmem
-   tutorials/enable_ptm
 
 Debug
 *****
diff --git a/doc/release_notes/release_notes_2.6.rst b/doc/release_notes/release_notes_2.6.rst
index 1b8836133..8c7453b81 100644
--- a/doc/release_notes/release_notes_2.6.rst
+++ b/doc/release_notes/release_notes_2.6.rst
@@ -104,7 +104,6 @@ formatting, and presentation:
 * :ref:`virtio-net`
 * :ref:`acrn_on_qemu`
 * :ref:`cpu_sharing`
-* :ref:`enable-ptm`
 * :ref:`nested_virt`
 * :ref:`setup_openstack_libvirt`
 * :ref:`using_hybrid_mode_on_nuc`
diff --git a/doc/tutorials/enable_ptm.rst b/doc/tutorials/enable_ptm.rst
deleted file mode 100644
index 42b9673b9..000000000
--- a/doc/tutorials/enable_ptm.rst
+++ /dev/null
@@ -1,88 +0,0 @@
-.. _enable-ptm:
-
-Enable PCIe Precision Time Management in a User VM
-##################################################
-
-The PCI Express (PCIe) specification defines a Precision Time Measurement (PTM)
-mechanism that lets you coordinate and synchronize events across multiple PCI
-components within the same system with very fine time precision.
-
-ACRN adds PCIe root port emulation in the hypervisor to support the PTM feature
-and emulates a simple PTM hierarchy.  ACRN enables PTM in a User VM if the user
-sets the ``enable_ptm`` option when passing through a device to a post-launched
-VM and :ref:`vm.PTM` is enabled in the scenario configuration. When you enable
-PTM, the passthrough device is connected to a virtual root port instead of the host
-bridge as it normally would.
-
-Before you can enable PTM in a User VM, PTM must be enabled in the Service VM.
-You should verify this by using ``dmesg`` in a Service VM terminal::
-
-    dmesg | grep -i ptm
-    [    3.072144] pci 0000:00:06.0: PTM enabled (root), 4ns granularity
-    [    3.101591] pci 0000:00:1a.0: PTM enabled (root), 4ns granularity
-    [    3.103434] pci 0000:00:1c.0: PTM enabled (root), 4ns granularity
-    [    5.089042] igc 0000:04:00.0: PTM enabled, 4ns granularity
-    [   88.103910] acrn_dm: <PTM>: opt=enable_ptm.
-    [   88.217266] acrn_dm: <PTM>-get_ptm_reg_value: device [4:0.0]: ptm pos=0x1f0, ptm reg val=0x401.
-    [   88.217566] acrn_dm: <PTM>-get_ptm_reg_value: device [0:1c.0]: ptm pos=0x150, ptm reg val=0x416.
-    [   88.217743] acrn_dm: <PTM>-get_ptm_reg_value: device [0:1c.0]: ptm pos=0x150, ptm reg val=0x3.
-
-
-Here is an example launch script that configures a supported Ethernet card for
-passthrough and enables PTM on it:
-
-.. code-block:: bash
-   :emphasize-lines: 9-11,17
-
-   declare -A passthru_vpid
-   declare -A passthru_bdf
-   passthru_vpid=(
-    ["ethptm"]="8086 15f2"
-    )
-   passthru_bdf=(
-    ["ethptm"]="0000:a9:00.0"
-    )
-   echo ${passthru_vpid["ethptm"]} > /sys/bus/pci/drivers/pci-stub/new_id
-   echo ${passthru_bdf["ethptm"]} > /sys/bus/pci/devices/${passthru_bdf["ethptm"]}/driver/unbind
-   echo ${passthru_bdf["ethptm"]} > /sys/bus/pci/drivers/pci-stub/bind
-
-   acrn-dm -A -m $mem_size -s 0:0,hostbridge \
-      -s 3,virtio-blk,uos-test.img \
-      -s 4,virtio-net,tap0 \
-      -s 5,virtio-console,@stdio:stdio_port \
-      -s 6,passthru,a9/00/0,enable_ptm \
-      --ovmf /usr/share/acrn/bios/OVMF.fd
-
-.. important:: By default, the :ref:`vm.PTM` option is disabled in ACRN VMs. Use the
-    :ref:`ACRN configuration tool <acrn_configuration_tool>` to enable PTM
-    in the scenario XML file that configures the Guest VM.
-
-Here is the bus hierarchy in the User VM (as shown by the ``lspci`` command)::
-
-   lspci -tv
-   -[0000:00]-+-00.0  Network Appliance Corporation Device 1275
-              +-03.0  Red Hat, Inc. Virtio block device
-              +-04.0  Red Hat, Inc. Virtio network device
-              +-05.0  Red Hat, Inc. Virtio console
-              \-06.0-[01]----00.0  Intel Corporation Device 15f2
-
-(Instead of ``Device 15f2`` you might see ``Ethernet Controller I225LM``.)
-
-You can verify that PTM was enabled by using ``dmesg`` in the User VM::
-
-    dmesg | grep -i ptm
-    [    0.774547] pci 0000:00:05.0: PTM enabled (root), 4ns granularity
-    [    2.478440] igc 0000:01:00.0: PTM enabled, 4ns granularity
-
-PTM Implementation Notes
-************************
-
-To simplify the implementation, the virtual root port only supports the most
-basic PCIe configuration and operation, in addition to PTM capabilities.
-
-To use PTM in a virtualized environment, you may want to first verify that PTM
-is supported by the device and is enabled on the bare metal machine and in the
-Guest VM kernel (e.g., ``CONFIG_PCIE_PTM=y`` option is set in the Linux kernel).
-
-You can find more details about the PTM implementation in the
-:ref:`ACRN HLD PCIe PTM documentation <PCIe PTM implementation>`.