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platform_drv: document PCI device naming after BDF

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Issue #4812
This commit is contained in:
Christian Helmuth 2023-04-19 16:47:35 +02:00
parent c705bdd6a9
commit 5cb06b5f1c
1 changed files with 6 additions and 0 deletions
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6
repos/os/src/drivers/platform/README
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@ -67,6 +67,12 @@ operate with global names of physical resources.
Policy for PCI devices
----------------------
PCI devices are named according to their bus-device-function triple as
hexadecimal BB:DD.F (see example below). Thus, dedicated devices can easily
be selected by name in policies.
! <device name="00:03.0" type="pci"...>
Policies for PCI devices do not necessarily need to state the name of
the device, but can either state a class of devices, or a vendor/device
pair of identifiers inside a pci sub-node: