linux-kernel - [PATCH RFC 01/11] dt-bindings: riscv: Add Sdtrig ISA extension

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Date: Fri, 29 Mar 2024 17:26:17 +0800
From: Max Hsu <max.hsu@...ive.com>
To: Conor Dooley <conor@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Pavel Machek <pavel@....cz>, 
 Anup Patel <anup@...infault.org>, Atish Patra <atishp@...shpatra.org>, 
 Paolo Bonzini <pbonzini@...hat.com>, Shuah Khan <shuah@...nel.org>
Cc: Palmer Dabbelt <palmer@...ive.com>, linux-riscv@...ts.infradead.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-pm@...r.kernel.org, kvm@...r.kernel.org, 
 kvm-riscv@...ts.infradead.org, linux-kselftest@...r.kernel.org, 
 Max Hsu <max.hsu@...ive.com>
Subject: [PATCH RFC 01/11] dt-bindings: riscv: Add Sdtrig ISA extension

As riscv-debug-spec [1] Chapter 5 introduce Sdtrig extension.

Add an entry for the Sdtrig extension to the riscv,isa-extensions property.

Link: https://github.com/riscv/riscv-debug-spec/releases/download/ar20231208/riscv-debug-stable.pdf [1]
Signed-off-by: Max Hsu <max.hsu@...ive.com>
---
 Documentation/devicetree/bindings/riscv/extensions.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index 468c646247aa..47d82cd35ca7 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
@@ -121,6 +121,13 @@ properties:
             version of the privileged ISA specification.

         # multi-letter extensions, sorted alphanumerically
+        - const: sdtrig
+          description: |
+            The standard Sdtrig extension for introduce trigger CSRs for
+            cause a breakpoint exception, entry into Debug Mode,
+            or trace action as frozen at commit 359bedc ("Freeze Candidate")
+            of riscv-debug-spec
+
         - const: smaia
           description: |
             The standard Smaia supervisor-level extension for the advanced

-- 
2.43.2