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PCI/TSM sysfs for physical function 0 devices, i.e. the "DSM" (Device Security Manager), contains the 'connect' and 'disconnect' attributes. After a successful 'connect' operation the DSM, its dependent functions (SR-IOV virtual functions, non-zero multi-functions, or downstream endpoints of a switch DSM) are candidates for being transitioned into a TDISP (TEE Device Interface Security Protocol) operational state, via pci_tsm_bind(). At present sysfs is blind to which devices are capable of TDISP operation and it is ambiguous which functions are serviced by which DSMs. Add a 'dsm' attribute to identify a function's DSM device, and add a 'bound' attribute to identify when a function has entered a TDISP operational state. Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Lukas Wunner <lukas@wunner.de> Cc: Samuel Ortiz <sameo@rivosinc.com> Cc: Alexey Kardashevskiy <aik@amd.com> Cc: Xu Yilun <yilun.xu@linux.intel.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Aneesh Kumar K.V <aneesh.kumar@kernel.org> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Link: https://patch.msgid.link/20251113021446.436830-9-dan.j.williams@intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.