[v2,15/19] riscv: hwprobe: export Zvfh[min] ISA extensions

Commit Message

Clément Léger Oct. 17, 2023, 1:14 p.m. UTC

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

Link: https://drive.google.com/file/d/1_Yt60HGAf1r1hx7JnsIptw0sqkBd9BQ8/view [1]
Signed-off-by: Clément Léger <[e-mail]>
---
 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(+)

Comments

Evan Green Oct. 18, 2023, 5:28 p.m. UTC | #1

On Tue, Oct 17, 2023 at 6:15 AM Clément Léger <[e-mail]> wrote:
>
> Export Zvfh[min] ISA extension[1] through hwprobe.
>
> Link: https://drive.google.com/file/d/1_Yt60HGAf1r1hx7JnsIptw0sqkBd9BQ8/view [1]
> Signed-off-by: Clément Léger <[e-mail]>

Reviewed-by: Evan Green <[e-mail]>

Patch

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()) {