On Thu, Feb 27, 2025 at 02:34:02PM +1000, Alistair Francis wrote: > The PCIe 6 specification added support for the Data Object > Exchange (DOE). > When DOE is supported the DOE Discovery Feature must be implemented per > PCIe r6.1 sec 6.30.1.1. The protocol allows a requester to obtain > information about the other DOE features supported by the device. > +What: /sys/bus/pci/devices/.../doe_features > +Date: March 2025 > +Contact: Linux PCI developers <linux-pci@xxxxxxxxxxxxxxx> > +Description: > + This directory contains a list of the supported > + Data Object Exchange (DOE) features. The features are > + the file name. The contents of each file is the raw vendor id and > + data object feature values. > + > + The value comes from the device and specifies the vendor and > + data object type supported. The lower (RHS of the colon) is > + the data object type in hex. The upper (LHS of the colon) > + is the vendor ID. > + > + As all DOE devices must support the DOE discovery protocol, if > + DOE is supported you will at least see the doe_discovery file, with > + this contents > + > + # cat doe_features/doe_discovery > + 0001:00 > + > + If the device supports other protocols you will see other files > + as well. For example is CMA/SPDM and secure CMA/SPDM are supported > + the doe_features directory will look like this > + > + # ls doe_features > + 0001:01 0001:02 doe_discovery Does this text need to be updated with s/protocol/feature/ as in the first patch?
