linux-kernel - [PATCH v2 1/3] dt-bindings: riscv: add bfloat16 ISA extension description

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Message-ID: <20241103074959.1135240-2-inochiama@gmail.com>
Date: Sun,  3 Nov 2024 15:49:55 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Jonathan Corbet <corbet@....net>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Conor Dooley <conor@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Clément Léger <cleger@...osinc.com>,
	Evan Green <evan@...osinc.com>,
	Charlie Jenkins <charlie@...osinc.com>,
	Andrew Jones <ajones@...tanamicro.com>,
	Andy Chiu <andybnac@...il.com>,
	Inochi Amaoto <inochiama@...il.com>,
	Xiao Wang <xiao.w.wang@...el.com>,
	Samuel Holland <samuel.holland@...ive.com>
Cc: linux-doc@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Yixun Lan <dlan@...too.org>,
	Longbin Li <looong.bin@...il.com>
Subject: [PATCH v2 1/3] dt-bindings: riscv: add bfloat16 ISA extension description

Add description for the BFloat16 precision Floating-Point ISA extension,
(Zfbfmin, Zvfbfmin, Zvfbfwma). which was ratified in commit 4dc23d62
("Added Chapter title to BF16") of the riscv-isa-manual.

Signed-off-by: Inochi Amaoto <inochiama@...il.com>
---
 .../devicetree/bindings/riscv/extensions.yaml | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index 2cf2026cff57..99d8b70fa321 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
@@ -277,6 +277,12 @@ properties:
             instructions, as ratified in commit 056b6ff ("Zfa is ratified") of
             riscv-isa-manual.
 
+        - const: zfbfmin
+          description:
+            The standard Zfbfmin extension which provides minimal support for
+            16-bit half-precision brain floating-point instructions, as ratified
+            in commit 4dc23d62 ("Added Chapter title to BF16") of riscv-isa-manual.
+
         - const: zfh
           description:
             The standard Zfh extension for 16-bit half-precision binary
@@ -467,6 +473,18 @@ properties:
             in commit 6f702a2 ("Vector extensions are now ratified") of
             riscv-v-spec.
 
+        - const: zvfbfmin
+          description:
+            The standard Zvfbfmin extension for minimal support for vectored
+            16-bit half-precision brain floating-point instructions, as ratified
+            in commit 4dc23d62 ("Added Chapter title to BF16") of riscv-isa-manual.
+
+        - const: zvfbfwma
+          description:
+            The standard Zvfbfwma extension for vectored half-precision brain
+            floating-point widening multiply-accumulate instructions, as ratified
+            in commit 4dc23d62 ("Added Chapter title to BF16") of riscv-isa-manual.
+
         - const: zvfh
           description:
             The standard Zvfh extension for vectored half-precision
@@ -605,6 +623,33 @@ properties:
         then:
           contains:
             const: zca
+      # Zfbfmin depends on F
+      - if:
+          contains:
+            const: zfbfmin
+        then:
+          contains:
+            const: f
+      # Zvfbfmin depends on V or Zve32f
+      - if:
+          contains:
+            const: zvfbfmin
+        then:
+          oneOf:
+            - contains:
+                const: v
+            - contains:
+                const: zve32f
+      # Zvfbfwma depends on Zfbfmin and Zvfbfmin
+      - if:
+          contains:
+            const: zvfbfwma
+        then:
+          allOf:
+            - contains:
+                const: zfbfmin
+            - contains:
+                const: zvfbfmin
 
 allOf:
   # Zcf extension does not exist on rv64
-- 
2.47.0