diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-pci | 11 | ||||
| -rw-r--r-- | Documentation/s390/pci.rst | 14 |
2 files changed, 18 insertions, 7 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci index 25c9c39770c6..1241b6d11a52 100644 --- a/Documentation/ABI/testing/sysfs-bus-pci +++ b/Documentation/ABI/testing/sysfs-bus-pci @@ -195,10 +195,13 @@ What: /sys/bus/pci/devices/.../index Date: July 2010 Contact: Narendra K <narendra_k@dell.com>, linux-bugs@dell.com Description: - Reading this attribute will provide the firmware - given instance (SMBIOS type 41 device type instance) of the - PCI device. The attribute will be created only if the firmware - has given an instance number to the PCI device. + Reading this attribute will provide the firmware given instance + number of the PCI device. Depending on the platform this can + be for example the SMBIOS type 41 device type instance or the + user-defined ID (UID) on s390. The attribute will be created + only if the firmware has given an instance number to the PCI + device and that number is guaranteed to uniquely identify the + device in the system. Users: Userspace applications interested in knowing the firmware assigned device type instance of the PCI diff --git a/Documentation/s390/pci.rst b/Documentation/s390/pci.rst index 492850bff316..8157f0cddbc2 100644 --- a/Documentation/s390/pci.rst +++ b/Documentation/s390/pci.rst @@ -50,7 +50,8 @@ Entries specific to zPCI functions and entries that hold zPCI information. * /sys/bus/pci/slots/XXXXXXXX The slot entries are set up using the function identifier (FID) of the - PCI function. + PCI function. The format depicted as XXXXXXXX above is 8 hexadecimal digits + with 0 padding and lower case hexadecimal digitis. - /sys/bus/pci/slots/XXXXXXXX/power @@ -88,8 +89,15 @@ Entries specific to zPCI functions and entries that hold zPCI information. is attached to. - uid - The unique identifier (UID) is defined when configuring an LPAR and is - unique in the LPAR. + The user identifier (UID) may be defined as part of the machine + configuration or the z/VM or KVM guest configuration. If the accompanying + uid_is_unique attribute is 1 the platform guarantees that the UID is unique + within that instance and no devices with the same UID can be attached + during the lifetime of the system. + + - uid_is_unique + Indicates whether the user identifier (UID) is guaranteed to be and remain + unique within this Linux instance. - pfip/segmentX The segments determine the isolation of a function. |