diff options
| author | Cyan Yang <cyan.yang@sifive.com> | 2025-04-18 13:32:31 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2025-05-08 11:01:43 -0700 |
| commit | 1a6274f035346e76835d46096136dd3e6cca9575 (patch) | |
| tree | 1f15724debf3e09b403a98f636050d5e0aa412a3 /arch/riscv/kernel | |
| parent | e8fd215ed0eb814486d50b4835007cbc50b2c2b7 (diff) | |
riscv: hwprobe: Add SiFive vendor extension support and probe for xsfqmaccdod and xsfqmaccqoq
Add a new hwprobe key "RISCV_HWPROBE_KEY_VENDOR_EXT_SIFIVE_0" which allows
userspace to probe for the new vendor extensions from SiFive. Also, add
new hwprobe for SiFive "xsfvqmaccdod" and "xsfvqmaccqoq" vendor
extensions.
Signed-off-by: Cyan Yang <cyan.yang@sifive.com>
Link: https://lore.kernel.org/r/20250418053239.4351-5-cyan.yang@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/kernel')
| -rw-r--r-- | arch/riscv/kernel/sys_hwprobe.c | 5 | ||||
| -rw-r--r-- | arch/riscv/kernel/vendor_extensions/Makefile | 1 | ||||
| -rw-r--r-- | arch/riscv/kernel/vendor_extensions/sifive_hwprobe.c | 20 |
3 files changed, 26 insertions, 0 deletions
diff --git a/arch/riscv/kernel/sys_hwprobe.c b/arch/riscv/kernel/sys_hwprobe.c index 249aec8594a9..138e74f05de7 100644 --- a/arch/riscv/kernel/sys_hwprobe.c +++ b/arch/riscv/kernel/sys_hwprobe.c @@ -15,6 +15,7 @@ #include <asm/uaccess.h> #include <asm/unistd.h> #include <asm/vector.h> +#include <asm/vendor_extensions/sifive_hwprobe.h> #include <asm/vendor_extensions/thead_hwprobe.h> #include <vdso/vsyscall.h> @@ -300,6 +301,10 @@ static void hwprobe_one_pair(struct riscv_hwprobe *pair, pair->value = riscv_timebase; break; + case RISCV_HWPROBE_KEY_VENDOR_EXT_SIFIVE_0: + hwprobe_isa_vendor_ext_sifive_0(pair, cpus); + break; + case RISCV_HWPROBE_KEY_VENDOR_EXT_THEAD_0: hwprobe_isa_vendor_ext_thead_0(pair, cpus); break; diff --git a/arch/riscv/kernel/vendor_extensions/Makefile b/arch/riscv/kernel/vendor_extensions/Makefile index d5fdde0e863b..a4eca96d1c8a 100644 --- a/arch/riscv/kernel/vendor_extensions/Makefile +++ b/arch/riscv/kernel/vendor_extensions/Makefile @@ -2,5 +2,6 @@ obj-$(CONFIG_RISCV_ISA_VENDOR_EXT_ANDES) += andes.o obj-$(CONFIG_RISCV_ISA_VENDOR_EXT_SIFIVE) += sifive.o +obj-$(CONFIG_RISCV_ISA_VENDOR_EXT_SIFIVE) += sifive_hwprobe.o obj-$(CONFIG_RISCV_ISA_VENDOR_EXT_THEAD) += thead.o obj-$(CONFIG_RISCV_ISA_VENDOR_EXT_THEAD) += thead_hwprobe.o diff --git a/arch/riscv/kernel/vendor_extensions/sifive_hwprobe.c b/arch/riscv/kernel/vendor_extensions/sifive_hwprobe.c new file mode 100644 index 000000000000..461ce0f305ce --- /dev/null +++ b/arch/riscv/kernel/vendor_extensions/sifive_hwprobe.c @@ -0,0 +1,20 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <asm/vendor_extensions/sifive.h> +#include <asm/vendor_extensions/sifive_hwprobe.h> +#include <asm/vendor_extensions/vendor_hwprobe.h> + +#include <linux/cpumask.h> +#include <linux/types.h> + +#include <uapi/asm/hwprobe.h> +#include <uapi/asm/vendor/sifive.h> + +void hwprobe_isa_vendor_ext_sifive_0(struct riscv_hwprobe *pair, const struct cpumask *cpus) +{ + VENDOR_EXTENSION_SUPPORTED(pair, cpus, + riscv_isa_vendor_ext_list_sifive.per_hart_isa_bitmap, { + VENDOR_EXT_KEY(XSFVQMACCDOD); + VENDOR_EXT_KEY(XSFVQMACCQOQ); + }); +} |