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ggml: replace hwcap with riscv_hwprobe for RVV detection (#17567) 

Signed-off-by: Wang Yang <yangwang@iscas.ac.cn>
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ixgbe 2025-11-29 20:56:31 +08:00 committed by GitHub
parent 47a268ea50
commit f698a79c63
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1 changed files with 11 additions and 8 deletions
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19
ggml/src/ggml-cpu/arch/riscv/cpu-feats.cpp
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@ -1,20 +1,23 @@
#include "ggml-backend-impl.h"
#if defined(__riscv) && __riscv_xlen == 64
#include <sys/auxv.h>
//https://github.com/torvalds/linux/blob/master/arch/riscv/include/uapi/asm/hwcap.h#L24
#ifndef COMPAT_HWCAP_ISA_V
#define COMPAT_HWCAP_ISA_V (1 << ('V' - 'A'))
#endif
#include <asm/hwprobe.h>
#include <asm/unistd.h>
#include <unistd.h>
struct riscv64_features {
bool has_rvv = false;
riscv64_features() {
uint32_t hwcap = getauxval(AT_HWCAP);
struct riscv_hwprobe probe;
probe.key = RISCV_HWPROBE_KEY_IMA_EXT_0;
probe.value = 0;
has_rvv = !!(hwcap & COMPAT_HWCAP_ISA_V);
int ret = syscall(__NR_riscv_hwprobe, &probe, 1, 0, NULL, 0);
if (0 == ret) {
has_rvv = !!(probe.value & RISCV_HWPROBE_IMA_V);
}
}
};