Documentation: riscv: uabi: Clarify ISA spec version for canonical order

docularxu · Paul Walmsley · commit 69132c2d4c11 · 2026-01-14T17:16:23.000-07:00
Specify that chapter 27 refers to version 20191213 of the RISC-V ISA Unprivileged Architecture. The chapter numbering differs across specification versions - for example, in version 20250508, the ISA Extension Naming Conventions is chapter 36, not chapter 27. Historical versions of the RISC-V specification can be found via Link [1]. Acked-by: Paul Walmsley <pjw@kernel.org> Link: https://riscv.org/specifications/ratified/ [1] Fixes: f07b2b3 ("Documentation: riscv: add a section about ISA string ordering in /proc/cpuinfo") Signed-off-by: Guodong Xu <guodong@riscstar.com> Link: https://patch.msgid.link/20260115-adding-b-dtsi-v2-1-254dd61cf947@riscstar.com
diff --git a/Documentation/arch/riscv/uabi.rst b/Documentation/arch/riscv/uabi.rst
@@ -7,7 +7,9 @@ ISA string ordering in /proc/cpuinfo
 ------------------------------------
 
 The canonical order of ISA extension names in the ISA string is defined in
-chapter 27 of the unprivileged specification.
+Chapter 27 of the RISC-V Instruction Set Manual Volume I Unprivileged ISA
+(Document Version 20191213).
+
 The specification uses vague wording, such as should, when it comes to ordering,
 so for our purposes the following rules apply:
 
