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riscv: hwprobe: Add MIPS vendor extension probing

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Add a new hwprobe key "RISCV_HWPROBE_KEY_VENDOR_EXT_MIPS_0" which allows
userspace to probe for the new xmipsexectl vendor extension.

Signed-off-by: Aleksa Paunovic <aleksa.paunovic@htecgroup.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20250724-p8700-pause-v5-4-a6cbbe1c3412@htecgroup.com
[pjw@kernel.org: fixed some checkpatch issues]
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Aleksa Paunovic
2025-07-24 17:23:28 +02:00
committed by Paul Walmsley
parent 1d4ce63e33
commit bb4b0f8a1b
7 changed files with 56 additions and 1 deletions
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1
arch/riscv/include/uapi/asm/hwprobe.h
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@@ -106,6 +106,7 @@ struct riscv_hwprobe {
#define RISCV_HWPROBE_KEY_VENDOR_EXT_THEAD_0 11
#define RISCV_HWPROBE_KEY_ZICBOM_BLOCK_SIZE 12
#define RISCV_HWPROBE_KEY_VENDOR_EXT_SIFIVE_0 13
#define RISCV_HWPROBE_KEY_VENDOR_EXT_MIPS_0 14
/* Increase RISCV_HWPROBE_MAX_KEY when adding items. */
/* Flags */

3
arch/riscv/include/uapi/asm/vendor/mips.h vendored Normal file
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@@ -0,0 +1,3 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#define RISCV_HWPROBE_VENDOR_EXT_XMIPSEXECTL BIT(0)