PM: EM: Rename em.yaml to dev-energymodel.yaml

The EM YNL specification used many acronyms, including ‘em’, ‘pd’,
‘ps’, etc. While the acronyms are short and convenient, they could be
confusing. So, let’s spell them out to be more specific. The following
changes were made in the spec. Note that the protocol name cannot exceed
GENL_NAMSIZ (16).

  em           -> dev-energymodel
  pds          -> perf-domains
  pd           -> perf-domain
  pd-id        -> perf-domain-id
  pd-table     -> perf-table
  ps           -> perf-state
  get-pds      -> get-perf-domains
  get-pd-table -> get-perf-table
  pd-created   -> perf-domain-created
  pd-updated   -> perf-domain-updated
  pd-deleted   -> perf-domain-deleted

In addition. doc strings were added to the spec. based on the comments in
energy_model.h. Two flag attributes (perf-state-flags and
perf-domain-flags) were added for easily interpreting the bit flags.

Finally, the autogenerated files and em_netlink.c were updated accordingly
to reflect the name changes.

Suggested-by: Donald Hunter <donald.hunter@gmail.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Signed-off-by: Changwoo Min <changwoo@igalia.com>
Link: https://patch.msgid.link/20260108053212.642478-3-changwoo@igalia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

2 files changed, 175 insertions, 116 deletions

diff --git a/Documentation/netlink/specs/dev-energymodel.yaml b/Documentation/netlink/specs/dev-energymodel.yaml
new file mode 100644
index 000000000000..cbc4bc38f23c
--- /dev/null
+++ b/Documentation/netlink/specs/dev-energymodel.yaml
@@ -0,0 +1,175 @@
+# SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
+#
+# Copyright (c) 2025 Valve Corporation.
+#
+---
+name: dev-energymodel
+
+doc: |
+  Energy model netlink interface to notify its changes.
+
+protocol: genetlink
+
+uapi-header: linux/dev_energymodel.h
+
+definitions:
+  -
+    type: flags
+    name: perf-state-flags
+    entries:
+      -
+        name: perf-state-inefficient
+        doc: >-
+          The performance state is inefficient. There is in this perf-domain,
+          another performance state with a higher frequency but a lower or
+          equal power cost.
+  -
+    type: flags
+    name: perf-domain-flags
+    entries:
+      -
+        name: perf-domain-microwatts
+        doc: >-
+          The power values are in micro-Watts or some other scale.
+      -
+        name: perf-domain-skip-inefficiencies
+        doc: >-
+          Skip inefficient states when estimating energy consumption.
+      -
+        name: perf-domain-artificial
+        doc: >-
+          The power values are artificial and might be created by platform
+          missing real power information.
+
+attribute-sets:
+  -
+    name: perf-domains
+    doc: >-
+      Information on all the performance domains.
+    attributes:
+      -
+        name: perf-domain
+        type: nest
+        nested-attributes: perf-domain
+        multi-attr: true
+  -
+    name: perf-domain
+    doc: >-
+      Information on a single performance domains.
+    attributes:
+      -
+        name: pad
+        type: pad
+      -
+        name: perf-domain-id
+        type: u32
+        doc: >-
+          A unique ID number for each performance domain.
+      -
+        name: flags
+        type: u64
+        doc: >-
+          Bitmask of performance domain flags.
+        enum: perf-domain-flags
+      -
+        name: cpus
+        type: string
+        doc: >-
+          CPUs that belong to this performance domain.
+  -
+    name: perf-table
+    doc: >-
+      Performance states table.
+    attributes:
+      -
+        name: perf-domain-id
+        type: u32
+        doc: >-
+          A unique ID number for each performance domain.
+      -
+        name: perf-state
+        type: nest
+        nested-attributes: perf-state
+        multi-attr: true
+  -
+    name: perf-state
+    doc: >-
+      Performance state of a performance domain.
+    attributes:
+      -
+        name: pad
+        type: pad
+      -
+        name: performance
+        type: u64
+        doc: >-
+          CPU performance (capacity) at a given frequency.
+      -
+        name: frequency
+        type: u64
+        doc: >-
+          The frequency in KHz, for consistency with CPUFreq.
+      -
+        name: power
+        type: u64
+        doc: >-
+          The power consumed at this level (by 1 CPU or by a registered
+          device). It can be a total power: static and dynamic.
+      -
+        name: cost
+        type: u64
+        doc: >-
+          The cost coefficient associated with this level, used during energy
+          calculation. Equal to: power * max_frequency / frequency.
+      -
+        name: flags
+        type: u64
+        doc: >-
+          Bitmask of performance state flags.
+        enum: perf-state-flags
+
+operations:
+  list:
+    -
+      name: get-perf-domains
+      attribute-set: perf-domains
+      doc: Get the list of information for all performance domains.
+      do:
+        reply:
+          attributes:
+            - perf-domain
+    -
+      name: get-perf-table
+      attribute-set: perf-table
+      doc: Get the energy model table of a performance domain.
+      do:
+        request:
+          attributes:
+            - perf-domain-id
+        reply:
+          attributes:
+            - perf-domain-id
+            - perf-state
+    -
+      name: perf-domain-created
+      doc: A performance domain is created.
+      notify: get-perf-table
+      mcgrp: event
+    -
+      name: perf-domain-updated
+      doc: A performance domain is updated.
+      notify: get-perf-table
+      mcgrp: event
+    -
+      name: perf-domain-deleted
+      doc: A performance domain is deleted.
+      attribute-set: perf-table
+      event:
+        attributes:
+          - perf-domain-id
+      mcgrp: event
+
+mcast-groups:
+  list:
+    -
+      name: event
diff --git a/Documentation/netlink/specs/em.yaml b/Documentation/netlink/specs/em.yaml
deleted file mode 100644
index 0c595a874f08..000000000000
--- a/Documentation/netlink/specs/em.yaml
+++ /dev/null
@@ -1,116 +0,0 @@
-# SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
-#
-# Copyright (c) 2025 Valve Corporation.
-#
----
-name: em
-
-doc: |
-  Energy model netlink interface to notify its changes.
-
-protocol: genetlink
-
-uapi-header: linux/energy_model.h
-
-attribute-sets:
-  -
-    name: pds
-    attributes:
-      -
-        name: pd
-        type: nest
-        nested-attributes: pd
-        multi-attr: true
-  -
-    name: pd
-    attributes:
-      -
-        name: pad
-        type: pad
-      -
-        name: pd-id
-        type: u32
-      -
-        name: flags
-        type: u64
-      -
-        name: cpus
-        type: string
-  -
-    name: pd-table
-    attributes:
-      -
-        name: pd-id
-        type: u32
-      -
-        name: ps
-        type: nest
-        nested-attributes: ps
-        multi-attr: true
-  -
-    name: ps
-    attributes:
-      -
-        name: pad
-        type: pad
-      -
-        name: performance
-        type: u64
-      -
-        name: frequency
-        type: u64
-      -
-        name: power
-        type: u64
-      -
-        name: cost
-        type: u64
-      -
-        name: flags
-        type: u64
-
-operations:
-  list:
-    -
-      name: get-pds
-      attribute-set: pds
-      doc: Get the list of information for all performance domains.
-      do:
-        reply:
-          attributes:
-            - pd
-    -
-      name: get-pd-table
-      attribute-set: pd-table
-      doc: Get the energy model table of a performance domain.
-      do:
-        request:
-          attributes:
-            - pd-id
-        reply:
-          attributes:
-            - pd-id
-            - ps
-    -
-      name: pd-created
-      doc: A performance domain is created.
-      notify: get-pd-table
-      mcgrp: event
-    -
-      name: pd-updated
-      doc: A performance domain is updated.
-      notify: get-pd-table
-      mcgrp: event
-    -
-      name: pd-deleted
-      doc: A performance domain is deleted.
-      attribute-set: pd-table
-      event:
-        attributes:
-          - pd-id
-      mcgrp: event
-
-mcast-groups:
-  list:
-    -
-      name: event