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What: /sys/devices/pciDDDD:BB
/sys/devices/.../pciDDDD:BB
Contact: linux-pci@vger.kernel.org
Description:
A PCI host bridge device parents a PCI bus device topology. PCI
controllers may also parent host bridges. The DDDD:BB format
conveys the PCI domain (ACPI segment) number and root bus number
(in hexadecimal) of the host bridge. Note that the domain number
may be larger than the 16-bits that the "DDDD" format implies
for emulated host-bridges.
What: pciDDDD:BB/firmware_node
Contact: linux-pci@vger.kernel.org
Description:
(RO) Symlink to the platform firmware device object "companion"
of the host bridge. For example, an ACPI device with an _HID of
PNP0A08 (/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00). See
/sys/devices/pciDDDD:BB entry for details about the DDDD:BB
format.
What: pciDDDD:BB/streamH.R.E
Contact: linux-pci@vger.kernel.org
Description:
(RO) When a platform has established a secure connection, PCIe
IDE, between two Partner Ports, this symlink appears. A stream
consumes a Stream ID slot in each of the Host bridge (H), Root
Port (R) and Endpoint (E). The link points to the Endpoint PCI
device in the Selective IDE Stream pairing. Specifically, "R"
and "E" represent the assigned Selective IDE Stream Register
Block in the Root Port and Endpoint, and "H" represents a
platform specific pool of stream resources shared by the Root
Ports in a host bridge. See /sys/devices/pciDDDD:BB entry for
details about the DDDD:BB format.
What: pciDDDD:BB/available_secure_streams
Contact: linux-pci@vger.kernel.org
Description:
(RO) When a host bridge has Root Ports that support PCIe IDE
(link encryption and integrity protection) there may be a
limited number of Selective IDE Streams that can be used for
establishing new end-to-end secure links. This attribute
decrements upon secure link setup, and increments upon secure
link teardown. The in-use stream count is determined by counting
stream symlinks. See /sys/devices/pciDDDD:BB entry for details
about the DDDD:BB format.
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