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docs: drvqemu: Give example how to query device properties for overriding

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Add an example of invoking qemu with '-device TYPE,?' to query
properties of a given type.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2022-11-21 13:46:29 +01:00
parent 9228ebbf98
commit f28232d1a4
1 changed files with 5 additions and 0 deletions
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docs/drvqemu.rst
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@ -722,6 +722,11 @@ attribute are:
The overrides are applied only to initial device configuration passed to QEMU
via the commandline. Later hotplug operations will not apply any modifications.
The properties of a device can be queried directly in qemu (e.g. for the
``virtio-blk-pci`` device) via ::
# qemu-system-x86_64 -device virtio-blk-pci,?
Configuring override for a device alias which is not used or attempting to
remove a device property which is not formatted by libvirt will cause failure
to startup the VM.