[RFC PATCH 1/3] dt-bindings: riscv: Add Sspesa and Ssplcofi extensions
From: Mayuresh Chitale <hidden>
Date: 2026-08-17 16:02:48
Also in:
linux-riscv, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Document the RISC-V Performance Event Sampling extensions Sspesa (Precise Event Sample Attribution) and Ssplcofi (Precise Local Counter Overflow Interrupt) in the ISA extensions binding. Add a dependency rule requiring Sspesa to be present whenever Ssplcofi is present. Signed-off-by: Mayuresh Chitale <redacted> --- .../devicetree/bindings/riscv/extensions.yaml | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index 5ffc40d599c0..f316b93754ff 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml@@ -232,6 +232,18 @@ properties: ratified at commit d70011dde6c2 ("Update to ratified state") of riscv-j-extension. + - const: sspesa + description: | + The standard Sspesa supervisor-level extension for precise event + sample attribution, as defined in the RISC-V Performance Event + Sampling specification. + + - const: ssplcofi + description: | + The standard Ssplcofi supervisor-level extension for precise local + counter overflow interrupts, as defined in the RISC-V Performance + Event Sampling specification. Ssplcofi depends on Sspesa. + - const: ssstateen description: | The standard Ssstateen extension for supervisor-mode view of the
@@ -934,6 +946,13 @@ properties: const: smnpm - contains: const: ssnpm + # Ssplcofi depends on Sspesa + - if: + contains: + const: ssplcofi + then: + contains: + const: sspesa # Za64rs and Ziccrse depend on Zalrsc or A - if: contains:
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2.43.0