linux-kernel - [PATCH v3 10/21] dt-bindings: riscv: add Smcntrpmf ISA extension description

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Message-Id: <20250127-counter_delegation-v3-10-64894d7e16d5@rivosinc.com>
Date: Mon, 27 Jan 2025 20:59:51 -0800
From: Atish Patra <atishp@...osinc.com>
To: Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Anup Patel <anup@...infault.org>, 
 Atish Patra <atishp@...shpatra.org>, Will Deacon <will@...nel.org>, 
 Mark Rutland <mark.rutland@....com>, Peter Zijlstra <peterz@...radead.org>, 
 Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Namhyung Kim <namhyung@...nel.org>, 
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
 Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
 Adrian Hunter <adrian.hunter@...el.com>, weilin.wang@...el.com
Cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Conor Dooley <conor@...nel.org>, devicetree@...r.kernel.org, 
 kvm@...r.kernel.org, kvm-riscv@...ts.infradead.org, 
 linux-arm-kernel@...ts.infradead.org, linux-perf-users@...r.kernel.org, 
 Atish Patra <atishp@...osinc.com>
Subject: [PATCH v3 10/21] dt-bindings: riscv: add Smcntrpmf ISA extension
 description

Add the description for Smcntrpmf ISA extension

Signed-off-by: Atish Patra <atishp@...osinc.com>
---
 Documentation/devicetree/bindings/riscv/extensions.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index 1706a77729db..0afe47259c55 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
@@ -136,6 +136,14 @@ properties:
             20240213 version of the privileged ISA specification. This extension
             depends on Sscsrind, Zihpm, Zicntr extensions.
 
+        - const: smcntrpmf
+          description: |
+            The standard Smcntrpmf supervisor-level extension for the machine mode
+            to enable privilege mode filtering for cycle and instret counters as
+            ratified in the 20240326 version of the privileged ISA specification.
+            The Ssccfg extension depends on this as *cfg CSRs are available only
+            if smcntrpmf is present.
+
         - const: smmpm
           description: |
             The standard Smmpm extension for M-mode pointer masking as

-- 
2.34.1