linux-kernel - [PATCH v3 7/7] dt-bindings: riscv: add Sxctr ISA extension description

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Message-Id: <20250523-b4-ctr_upstream_v3-v3-7-ad355304ba1c@rivosinc.com>
Date: Fri, 23 May 2025 00:25:13 +0100
From: Rajnesh Kanwal <rkanwal@...osinc.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
 Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>, 
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
 Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
 Adrian Hunter <adrian.hunter@...el.com>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Alexandre Ghiti <alex@...ti.fr>, Atish Kumar Patra <atishp@...osinc.com>, 
 Anup Patel <anup@...infault.org>, Will Deacon <will@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Beeman Strong <beeman@...osinc.com>
Cc: linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-riscv@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org, 
 Palmer Dabbelt <palmer@...ive.com>, Conor Dooley <conor@...nel.org>, 
 devicetree@...r.kernel.org, Rajnesh Kanwal <rkanwal@...osinc.com>
Subject: [PATCH v3 7/7] dt-bindings: riscv: add Sxctr ISA extension
 description

Add the S[m|s]ctr ISA extension description.

Signed-off-by: Rajnesh Kanwal <rkanwal@...osinc.com>
---
 .../devicetree/bindings/riscv/extensions.yaml      | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index f34bc66940c06bf9b3c18fcd7cce7bfd0593cd28..193751400933ca3fe69e0b2bc03e9c635e2db244 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
@@ -149,6 +149,13 @@ properties:
             to enable privilege mode filtering for cycle and instret counters as
             ratified in the 20240326 version of the privileged ISA specification.
 
+        - const: smctr
+          description: |
+            The standard Smctr supervisor-level extension for the machine mode
+            to enable recording limited branch history in a register-accessible
+            internal core storage as ratified at commit 9c87013 ("Merge pull
+            request #44 from riscv/issue-42-fix") of riscv-control-transfer-records.
+
         - const: smmpm
           description: |
             The standard Smmpm extension for M-mode pointer masking as
@@ -196,6 +203,13 @@ properties:
             and mode-based filtering as ratified at commit 01d1df0 ("Add ability
             to manually trigger workflow. (#2)") of riscv-count-overflow.
 
+        - const: ssctr
+          description: |
+            The standard Ssctr supervisor-level extension for recording limited
+            branch history in a register-accessible internal core storage as
+            ratified at commit 9c87013 ("Merge pull request #44 from
+            riscv/issue-42-fix") of riscv-control-transfer-records.
+
         - const: ssnpm
           description: |
             The standard Ssnpm extension for next-mode pointer masking as
@@ -740,6 +754,20 @@ properties:
                 const: zihpm
             - contains:
                 const: zicntr
+      # Smctr depends on Sscsrind
+      - if:
+          contains:
+            const: smctr
+        then:
+          contains:
+            const: sscsrind
+      # Ssctr depends on Sscsrind
+      - if:
+          contains:
+            const: ssctr
+        then:
+          contains:
+            const: sscsrind
 
 allOf:
   # Zcf extension does not exist on rv64

-- 
2.43.0