s390/pci: Expose firmware provided UID Checking state in sysfs

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The sysfs file /sys/bus/pci/devices/<device_id>/uid_is_unique provides
the UID Checking state as a per device attribute, highlighting its
effect of providing the guarantee that a device's UID is unique.
As a device attribute, this parameter is however unavailable if no
device is configured.

Expose the UID Checking state as:
  - A platform-level parameter
  - Available regardless of device presence or state

Signed-off-by: Ramesh Errabolu <ramesh@linux.ibm.com>
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

...

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Ramesh Errabolu 2025-09-28 23:38:27 -05:00 • committed by Heiko Carstens

parent 4335edb713

commit b043a81ce3

3 changed files with 39 additions and 0 deletions

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10

arch/s390/include/asm/pci.h

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4

arch/s390/pci/pci.c

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25

arch/s390/pci/pci_sysfs.c

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