linux-kernel - [PATCH v2 15/19] riscv: hwprobe: export Zvfh[min] ISA extensions

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Message-ID: <20231017131456.2053396-16-cleger@rivosinc.com>
Date:   Tue, 17 Oct 2023 15:14:52 +0200
From:   Clément Léger <cleger@...osinc.com>
To:     linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Cc:     Clément Léger <cleger@...osinc.com>,
        Palmer Dabbelt <palmer@...osinc.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Jonathan Corbet <corbet@....net>,
        Andrew Jones <ajones@...tanamicro.com>,
        Evan Green <evan@...osinc.com>,
        Conor Dooley <conor@...nel.org>,
        Samuel Ortiz <sameo@...osinc.com>
Subject: [PATCH v2 15/19] riscv: hwprobe: export Zvfh[min] ISA extensions

Export Zvfh[min] ISA extension[1] through hwprobe.

Link: https://drive.google.com/file/d/1_Yt60HGAf1r1hx7JnsIptw0sqkBd9BQ8/view [1]
Signed-off-by: Clément Léger <cleger@...osinc.com>
---
 Documentation/riscv/hwprobe.rst       | 8 ++++++++
 arch/riscv/include/uapi/asm/hwprobe.h | 2 ++
 arch/riscv/kernel/sys_riscv.c         | 2 ++
 3 files changed, 12 insertions(+)

diff --git a/Documentation/riscv/hwprobe.rst b/Documentation/riscv/hwprobe.rst
index 9c909e0d5316..782ac26cb92a 100644
--- a/Documentation/riscv/hwprobe.rst
+++ b/Documentation/riscv/hwprobe.rst
@@ -146,6 +146,14 @@ The following keys are defined:
   * :c:macro:`RISCV_HWPROBE_EXT_ZIHINTNTL`: The Zihintntl extension version 1.0
        is supported as defined in the RISC-V ISA manual.
 
+  * :c:macro:`RISCV_HWPROBE_EXT_ZVFH`: The Zvfh extension is supported as
+       defined in the RISC-V Vector manual starting from commit e2ccd0548d6c
+       ("Remove draft warnings from Zvfh[min]").
+
+  * :c:macro:`RISCV_HWPROBE_EXT_ZVFHMIN`: The Zvfhmin extension is supported as
+       defined in the RISC-V Vector manual starting from commit e2ccd0548d6c
+       ("Remove draft warnings from Zvfh[min]").
+
 * :c:macro:`RISCV_HWPROBE_KEY_CPUPERF_0`: A bitmask that contains performance
   information about the selected set of processors.
 
diff --git a/arch/riscv/include/uapi/asm/hwprobe.h b/arch/riscv/include/uapi/asm/hwprobe.h
index dc4eaa978ad1..79407010952a 100644
--- a/arch/riscv/include/uapi/asm/hwprobe.h
+++ b/arch/riscv/include/uapi/asm/hwprobe.h
@@ -52,6 +52,8 @@ struct riscv_hwprobe {
 #define		RISCV_HWPROBE_EXT_ZFH		(1 << 26)
 #define		RISCV_HWPROBE_EXT_ZFHMIN	(1 << 27)
 #define		RISCV_HWPROBE_EXT_ZIHINTNTL	(1 << 28)
+#define		RISCV_HWPROBE_EXT_ZVFH		(1 << 29)
+#define		RISCV_HWPROBE_EXT_ZVFHMIN	(1 << 30)
 #define RISCV_HWPROBE_KEY_CPUPERF_0	5
 #define		RISCV_HWPROBE_MISALIGNED_UNKNOWN	(0 << 0)
 #define		RISCV_HWPROBE_MISALIGNED_EMULATED	(1 << 0)
diff --git a/arch/riscv/kernel/sys_riscv.c b/arch/riscv/kernel/sys_riscv.c
index 84daaf6ed4a1..8d6edd721627 100644
--- a/arch/riscv/kernel/sys_riscv.c
+++ b/arch/riscv/kernel/sys_riscv.c
@@ -185,6 +185,8 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
 			CHECK_ISA_EXT(ZVKSED);
 			CHECK_ISA_EXT(ZVKSH);
 			CHECK_ISA_EXT(ZVKT);
+			CHECK_ISA_EXT(ZVFH);
+			CHECK_ISA_EXT(ZVFHMIN);
 		}
 
 		if (has_fpu()) {
-- 
2.42.0