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[doc] usage: Add Selecting an IVSHMEM device
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@ -523,3 +523,40 @@ The rules are written as follows:
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This capture interface also looks for and reads the value of the system
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This capture interface also looks for and reads the value of the system
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environment variable ``NVFBC_PRIV_DATA`` if it has been set, documentation on
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environment variable ``NVFBC_PRIV_DATA`` if it has been set, documentation on
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its usage however is unavailable.
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its usage however is unavailable.
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.. _host_select_ivshmem:
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Selecting an IVSHMEM device
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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For those attaching multiple IVSHMEM devices to their Virtual Machines, you must
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configure the Looking Glass host to use the correct device. By default the first
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device is selected.
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The ``os:shmDevice`` option configures which device is used. These are ordered
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by PCI slot and count up from 0 (default), with 0 being the first IVSHMEM device
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in the lowest slot.
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.. code:: ini
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[os]
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; Select the second IVSHMEM device
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shmDevice=1
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.. note::
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``os:shmDevice`` ignores the actual PCI slot number, instead selecting the
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*N*\th slot occupied by an IVSHMEM device. For example: with only two IVSHMEM
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devices in slots 0x03 and 0x05, the device in slot 0x03 will be referred to
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by *0* (first shm device), and the device in 0x05 by *1* (second shm device).
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PCI slot numbers are visible in Device Manager:
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1. Double-click any "IVSHMEM device" in Device Manager (``devmgmt.msc``)
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2. Find the slot number in the "Location:" field. (e.g. PCI slot 5)
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You can also find a listing of IVSHMEM devices in the ``looking-glass-host.txt``
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log file, with slot numbers shown next to "device" (asterisk indicates currently
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selected device)::
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[I] 19989544 … IVSHMEM 0 on bus 0x6, device 0x3, function 0x0
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[I] 19990438 … IVSHMEM 1* on bus 0x6, device 0x5, function 0x0
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@ -56,11 +56,13 @@ realtime
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renderer
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renderer
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repo
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repo
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runtime
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runtime
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shm
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submodule
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submodule
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submodules
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submodules
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spencercw
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spencercw
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systemd
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systemd
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Threadripper
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Threadripper
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th
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toolchain
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toolchain
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tritanope
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tritanope
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tunable
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tunable
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