mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 03:58:46 +07:00
26c88f9301
Add some documentation about ... /sys/devices/system/cpu/dscr_default /sys/devices/system/cpu/cpuN/dscr ... to Documentation/ABI/stable. Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
26 lines
979 B
Plaintext
26 lines
979 B
Plaintext
What: /sys/devices/system/cpu/dscr_default
|
|
Date: 13-May-2014
|
|
KernelVersion: v3.15.0
|
|
Contact:
|
|
Description: Writes are equivalent to writing to
|
|
/sys/devices/system/cpu/cpuN/dscr on all CPUs.
|
|
Reads return the last written value or 0.
|
|
This value is not a global default: it is a way to set
|
|
all per-CPU defaults at the same time.
|
|
Values: 64 bit unsigned integer (bit field)
|
|
|
|
What: /sys/devices/system/cpu/cpu[0-9]+/dscr
|
|
Date: 13-May-2014
|
|
KernelVersion: v3.15.0
|
|
Contact:
|
|
Description: Default value for the Data Stream Control Register (DSCR) on
|
|
a CPU.
|
|
This default value is used when the kernel is executing and
|
|
for any process that has not set the DSCR itself.
|
|
If a process ever sets the DSCR (via direct access to the
|
|
SPR) that value will be persisted for that process and used
|
|
on any CPU where it executes (overriding the value described
|
|
here).
|
|
If set by a process it will be inherited by child processes.
|
|
Values: 64 bit unsigned integer (bit field)
|