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-rw-r--r--Documentation/s390/pci.rst14
1 files changed, 11 insertions, 3 deletions
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.