xref: /openbmc/linux/drivers/ras/Kconfig (revision 6b342707)
1# SPDX-License-Identifier: GPL-2.0-only
2menuconfig RAS
3	bool "Reliability, Availability and Serviceability (RAS) features"
4	help
5	  Reliability, availability and serviceability (RAS) is a computer
6	  hardware engineering term. Computers designed with higher levels
7	  of RAS have a multitude of features that protect data integrity
8	  and help them stay available for long periods of time without
9	  failure.
10
11	  Reliability can be defined as the probability that the system will
12	  produce correct outputs up to some given time. Reliability is
13	  enhanced by features that help to avoid, detect and repair hardware
14	  faults.
15
16	  Availability is the probability a system is operational at a given
17	  time, i.e. the amount of time a device is actually operating as the
18	  percentage of total time it should be operating.
19
20	  Serviceability or maintainability is the simplicity and speed with
21	  which a system can be repaired or maintained; if the time to repair
22	  a failed system increases, then availability will decrease.
23
24	  Note that Reliability and Availability are distinct concepts:
25	  Reliability is a measure of the ability of a system to function
26	  correctly, including avoiding data corruption, whereas Availability
27	  measures how often it is available for use, even though it may not
28	  be functioning correctly. For example, a server may run forever and
29	  so have ideal availability, but may be unreliable, with frequent
30	  data corruption.
31
32if RAS
33
34source "arch/x86/ras/Kconfig"
35
36endif
37