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| author | Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> | 2017-08-10 06:31:19 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-10 15:40:01 +0300 |
| commit | 8e84b2d1f0f6a00b6476790f7bce6dcbffe91980 (patch) | |
| tree | f348d51b13bf87653605b18e9dbd6be21e518e29 /Documentation/ABI/testing/sysfs-firmware-opal-psr | |
| parent | cb8b340de21e1c57e1c6d4f26ccc4af46a3ed559 (diff) | |
| download | linux-8e84b2d1f0f6a00b6476790f7bce6dcbffe91980.tar.xz | |
powerpc/powernv: Add support to set power-shifting-ratio
This patch adds support to set power-shifting-ratio which hints the
firmware how to distribute/throttle power between different entities
in a system (e.g CPU v/s GPU). This ratio is used by OCC for power
capping algorithm.
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-firmware-opal-psr')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-firmware-opal-psr | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-firmware-opal-psr b/Documentation/ABI/testing/sysfs-firmware-opal-psr new file mode 100644 index 000000000000..cc2ece70e365 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-firmware-opal-psr @@ -0,0 +1,18 @@ +What: /sys/firmware/opal/psr +Date: August 2017 +Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> +Description: Power-Shift-Ratio directory for Powernv P9 servers + + Power-Shift-Ratio allows to provide hints the firmware + to shift/throttle power between different entities in + the system. Each attribute in this directory indicates + a settable PSR. + +What: /sys/firmware/opal/psr/cpu_to_gpu_X +Date: August 2017 +Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> +Description: PSR sysfs attributes for Powernv P9 servers + + Power-Shift-Ratio between CPU and GPU for a given chip + with chip-id X. This file gives the ratio (0-100) + which is used by OCC for power-capping. |