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doc/install.rst
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@ -3,101 +3,24 @@
Installation
############
.. _host_install:
.. _libvirt:
Host Application
----------------
The Looking Glass Host application captures frames from the guest OS using a
capture API, and sends them to the
:ref:`Client <client_install>`—be it on the host OS (hypervisor) or another
Virtual Machine—through a low-latency transfer protocol over shared memory.
You can get the host program in two ways:
- Download a pre-built binary from https://looking-glass.io/downloads
(**recommended**)
- Download the source code as described in :ref:`building`, then
:ref:`build the host <host_building>`.
.. _host_install_windows:
Windows
~~~~~~~
To begin, you must first run the Windows VM with the changes noted above in
either the :ref:`client_libvirt_configuration` or :ref:`client_qemu_commands`
sections.
.. _installing_the_ivshmem_driver:
Installing the IVSHMEM Driver
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Since B6 the host installer available on the official Looking Glass website
comes with the IVSHMEM driver and will install this for you. If you are running
an older version of Looking Glass please refer to the documentation for your
version.
.. _host_install_service:
Installing the Looking Glass Service
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
After installing your IVSHMEM driver, we can now install the Looking Glass Host
onto our Windows Virtual Machine.
1. First, run ``looking-glass-host-setup.exe`` as an administrator
(:ref:`Why? <faq_host_admin_privs>`)
2. You will be greeted by an intro screen. Press ``Next`` to continue.
3. You are presented with the |license| license. Please read and agree to the
license by pressing ``Agree``.
4. You can change the install path if you wish, otherwise press ``Next`` to
continue.
5. You may enable or disable options on this screen to configure the
installation. The default values are recommended for most users.
Press ``Install`` to begin installation.
6. After a few moments, installation will complete, and you will have a
running instance of Looking Glass. If you experience failures, you can
see them in the install log appearing in the middle of the window.
7. Press ``Close`` to exit the installer.
Command line users can run ``looking-glass-host-setup.exe /S`` to execute a
silent install with default options selected. Further configuration from the
command line can be done with flags. You can list all available flags by
running ``looking-glass-host-setup.exe /?``.
.. _client_install:
Client
------
The Looking Glass Client receives frames from the :ref:`Host <host_install>` to
display on your screen. It also handles input, and can optionally share the
system clipboard with your guest OS through Spice.
First you must build the client from source, see :ref:`building`. Once you have
built the client, you can install it. Run the following as root::
make install
To install for the local user only, run::
cmake -DCMAKE_INSTALL_PREFIX=~/.local .. && make install
.. _client_libvirt_configuration:
libvirt Configuration
~~~~~~~~~~~~~~~~~~~~~
libvirt/QEMU Configuration:
---------------------------
This article assumes you already have a fully functional libvirt domain with
PCI passthrough working on a dedicated monitor.
PCI passthrough working.
If you use virt-manager, this guide also applies to you, since virt-manager uses
libvirt as its back-end.
**If you are using QEMU directly, this does not apply to you.**
.. _libvirt_ivshmem:
IVSHMEM
^^^^^^^
Configuration
~~~~~~~~~~~~~
Add the following to your libvirt machine configuration inside the
'devices' section by running ``virsh edit <VM>`` where ``<VM>`` is the name of
@ -110,92 +33,22 @@ your virtual machine.
<size unit='M'>32</size>
</shmem>
.. note::
If you are using QEMU directly without libvirt the following arguments are
required instead.
Add the following to the commands to your QEMU command line, adjusting
the ``bus`` parameter to suit your particular configuration:
.. code:: bash
-device ivshmem-plain,memdev=ivshmem,bus=pcie.0 \
-object memory-backend-file,id=ivshmem,share=on,mem-path=/dev/shm/looking-glass,size=32M
The memory size (show as 32 in the example above) may need to be
adjusted as per the :ref:`Determining Memory <client_determining_memory>` section.
adjusted as per the :ref:`Determining Memory <libvirt_determining_memory>` section.
.. _client_spice_server:
Spice Server
^^^^^^^^^^^^
If you would like to use Spice to give you keyboard and mouse input
along with clipboard sync support, make sure you have a
``<graphics type='spice'>`` device, then:
- Find your ``<video>`` device, and set ``<model type='none'/>``
- If you can't find it, make sure you have a ``<graphics>``
device, save and edit again
- On older libvirt versions, just disable the device in Windows
Device Manager
- Remove the ``<input type='tablet'/>`` device, if you have one
- Create an ``<input type='mouse'/>`` device, if you don't already have one
- Create an ``<input type='keyboard' bus='virtio'/>`` device to improve
keyboard usage
- This requires the *vioinput* driver from
`virtio-win <https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/>`_
to be installed in the guest
If you want clipboard synchronization please see
:ref:`client_clipboard_synchronization`
.. _client_apparmor:
AppArmor
^^^^^^^^
For libvirt versions before **5.10.0**, if you are using AppArmor, you
need to add permissions for QEMU to access the shared memory file. This
can be done by adding the following to
``/etc/apparmor.d/local/abstractions/libvirt-qemu``::
/dev/shm/looking-glass rw,
then, restart AppArmor.
.. code:: bash
sudo systemctl restart apparmor
.. _client_memballoon_tweak:
Memballoon
^^^^^^^^^^
The VirtIO memballoon device enables the host to dynamically reclaim memory
from your VM by growing the balloon inside the guest, reserving reclaimed
memory. Libvirt adds this device to guests by default.
However, this device causes major performance issues with VFIO passthrough
setups, and should be disabled.
Find the ``<memballoon>`` tag and set its type to ``none``:
.. code:: xml
<memballoon model="none"/>
.. _client_qemu_commands:
QEMU Commands
~~~~~~~~~~~~~
**If you are using libvirt/virt-manager, then this does not apply to you.**
Add the following to the commands to your QEMU command line, adjusting
the ``bus`` parameter to suit your particular configuration:
.. code:: bash
-device ivshmem-plain,memdev=ivshmem,bus=pcie.0 \
-object memory-backend-file,id=ivshmem,share=on,mem-path=/dev/shm/looking-glass,size=32M
The memory size (shown as 32M in the example above) may need to be
adjusted as per :ref:`Determining Memory <client_determining_memory>` section.
.. _client_determining_memory:
.. _libvirt_determining_memory:
Determining Memory
~~~~~~~~~~~~~~~~~~
@ -216,10 +69,15 @@ For example, for a resolution of 1920x1080 (1080p):
You must round this value up to the nearest power of two, which for the
provided example is 32MB.
.. _client_shmfile_permissions:
.. note::
Increasing this value beyond what you need does not yield any performance
improvements, it simply will block access to that RAM making it unusable by
your system.
Shared Memory File Permissions
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. _libvirt_shmfile_permissions:
Permissions
~~~~~~~~~~~
The shared memory file used by IVSHMEM is found in ``/dev/shm/looking-glass``.
By default, it is owned by QEMU, and does not give read/write permissions to
@ -239,10 +97,56 @@ with the following::
Change ``UID`` to the user name you will run Looking Glass with, usually your
own.
.. _client_clipboard_synchronization:
.. _libvirt_spice_server:
Keyboard/Mouse/Display/Sound
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Looking Glass makes use of the SPICE protocol to provide keyboard and mouse
input, sound input and output, and display fallback.
.. note::
The default configuration that libvirt uses is not optimal and must be
adjusted. Failure to perform these changes will cause input issues along
with failure to support 5 button mice.
If you would like to use Spice to give you keyboard and mouse input
along with clipboard sync support, make sure you have a
``<graphics type='spice'>`` device, then:
- Find your ``<video>`` device, and set ``<model type='vga'/>``
- If you can't find it, make sure you have a ``<graphics>``
device, save and edit again.
- Remove the ``<input type='tablet'/>`` device, if you have one.
- Create an ``<input type='mouse' bus='virtio'/>`` device, if you don't
already have one.
- Create an ``<input type='keyboard' bus='virtio'/>`` device to improve
keyboard usage.
.. note::
Be sure to install the the *vioinput* driver from
`virtio-win <https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/>`_
in the guest
To enable Audio support add a standard Intel HDA audio device to your
configuration as per below:
.. code:: xml
<sound model='ich9'>
<audio id='1'/>
</sound>
<audio id='1' type='spice'/>
If you also want clipboard synchronization please see
:ref:`libvirt_clipboard_synchronization`
.. _libvirt_clipboard_synchronization:
Clipboard Synchronization
~~~~~~~~~~~~~~~~~~~~~~~~~
^^^^^^^^^^^^^^^^^^^^^^^^^
Looking Glass can synchronize the clipboard between the host and guest using
the SPICE guest agent.
@ -269,3 +173,178 @@ https://www.spice-space.org/download.html#windows-binaries.
<address type="virtio-serial" controller="0" bus="0" port="1"/>
</channel>
<!-- No need to add a VirtIO Serial device, it will be added automatically -->
.. _libvirt_apparmor:
AppArmor
^^^^^^^^
For libvirt versions before **5.10.0**, if you are using AppArmor, you
need to add permissions for QEMU to access the shared memory file. This
can be done by adding the following to
``/etc/apparmor.d/local/abstractions/libvirt-qemu``::
/dev/shm/looking-glass rw,
then, restart AppArmor.
.. code:: bash
sudo systemctl restart apparmor
.. _libvirt_memballoon_tweak:
Memballoon
^^^^^^^^^^
The VirtIO memballoon device enables the host to dynamically reclaim memory
from your VM by growing the balloon inside the guest, reserving reclaimed
memory. Libvirt adds this device to guests by default.
However, this device causes major performance issues with VFIO passthrough
setups, and should be disabled.
Find the ``<memballoon>`` tag and set its type to ``none``:
.. code:: xml
<memballoon model="none"/>
.. _host_install:
Additional Tuning
^^^^^^^^^^^^^^^^^
Looking Glass is latency sensitive and as such it may suffer microstutters if
you have not properly tuned your virtual machine. The physical display output
of your GPU will usually not show such issues due to the nature of the hardware
but be sure that if you are experiencing issues the following tuning is
required to obtain optimal performance.
1. Do not assign all your CPU cores to your guest VM, you must at minimum
reserve two CPU cores (4 threads) for your host system to use. For example,
if you have a 6 core CPU, only assign 4 cores (8 threads) to the guest.
2. Ensure you correctly pin your VMs vCPU threads to the correct cores for your
CPU architecture.
3. If you are on a NUMA architecture (dual CPU, or early Threadripper) be sure
that you pin the vCPU threads to the physical CPU/die attached to your GPU.
4. Just because your GPU is in a slot that is physically x16 in size, does not
mean your GPU is running at x16, this is dependent on how your motherboard
is physically wired and the physical slot may be limited to x4 or x8.
5. Be sure to set your CPU model type to `host-passthrough` so that your guest
operating system is aware of the acceleration features of your CPU and can
make full use of them.
6. AMD users be sure that you have the CPU feature flag `topoext` enabled or
your guest operating system will not be aware of which CPU cores are
hyper-thread pairs.
7. NVIDIA users may want to enable NvFBC as an alternative capture API in the
guest. Note that NvFBC is officially available on professional cards only
and methods to enable NvFBC on non-supported GPUs is against the NVIDIA
Capture API SDK License Agreement even though GeForce Experience and
Steam make use of it on any NVIDIA GPU.
How to perform these changes is left as an exercise to the reader.
Host Application
----------------
The Looking Glass Host application captures frames from the guest OS using a
capture API, and sends them to the
:ref:`Client <client_install>`—be it on the host OS (hypervisor) or another
Virtual Machine—through a low-latency transfer protocol over shared memory.
You can get the host program in two ways:
- Download a pre-built binary from https://looking-glass.io/downloads
(**recommended**)
- Download the source code as described in :ref:`building`, then
:ref:`build the host <host_building>`.
.. _host_install_linux:
For Linux
^^^^^^^^^
While the host application can be compiled and is somewhat functional for Linux
it is currently considered incomplete and not ready for usage. As such use at
your own risk and do not ask for support.
.. _host_install_osx:
For OSX
^^^^^^^
Currently there is no support or plans for support for OSX due to technical
limitations.
.. _host_install_windows:
For Windows
^^^^^^^^^^^
To begin, you must first run the Windows VM with the changes noted above in
either the :ref:`libvirt` section.
.. _installing_the_ivshmem_driver:
Installing the IVSHMEM Driver
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Since B6 the host installer available on the official Looking Glass website
comes with the IVSHMEM driver and will install this for you. If you are running
an older version of Looking Glass please refer to the documentation for your
version.
.. _host_install_service:
Installing the Looking Glass Service
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
After installing your IVSHMEM driver, we can now install the Looking Glass Host
onto our Windows Virtual Machine.
1. First, run ``looking-glass-host-setup.exe`` as an administrator
(:ref:`Why? <faq_host_admin_privs>`)
2. You will be greeted by an intro screen. Press ``Next`` to continue.
3. You are presented with the |license| license. Please read and agree to the
license by pressing ``Agree``.
4. You can change the install path if you wish, otherwise press ``Next`` to
continue.
5. You may enable or disable options on this screen to configure the
installation. The default values are recommended for most users.
Press ``Install`` to begin installation.
6. After a few moments, installation will complete, and you will have a
running instance of Looking Glass. If you experience failures, you can
see them in the install log appearing in the middle of the window.
7. Press ``Close`` to exit the installer.
Command line users can run ``looking-glass-host-setup.exe /S`` to execute a
silent install with default options selected. Further configuration from the
command line can be done with flags. You can list all available flags by
running ``looking-glass-host-setup.exe /?``.
.. _client_install:
Client Application
------------------
The Looking Glass Client receives frames from the :ref:`Host <host_install>` to
display on your screen. It also handles input, and can optionally share the
system clipboard with your guest OS through Spice.
First you must build the client from source, see :ref:`building`. Once you have
built the client, you can install it. Run the following as root::
make install
To install for the local user only, run::
cmake -DCMAKE_INSTALL_PREFIX=~/.local .. && make install

2
doc/module.rst
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@ -183,7 +183,7 @@ should use this XML block to configure their VM for kvmfr:
- The ``"size"`` tag represents the size of the shared memory device in
bytes. Once you determine the proper size of the device as per
:ref:`Determining Memory <client_determining_memory>`, use the figure you
:ref:`Determining Memory <libvirt_determining_memory>`, use the figure you
got to calculate the size in bytes:
``size_in_MB x 1024 x 1024 = size_in_bytes``

2
doc/troubleshooting.rst
View file

@ -28,7 +28,7 @@ The Clipboard is not Working
- Before you can copy or paste content between the Guest and Host,
:ref:`clipboard
synchronization <client_clipboard_synchronization>`
synchronization <libvirt_clipboard_synchronization>`
must be enabled.
- **Did you install the Spice Guest Tools?**

2
doc/words.txt
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@ -28,6 +28,7 @@ libvirt
linux
LookingGlass
memballoon
microstutters
mingw
mipmapping
modprobe
@ -49,6 +50,7 @@ runtime
submodule
submodules
systemd
Threadripper
toolchain
tritanope
tunable