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#include <stdint.h>
#include <arm/linux/api.h>
#include <cpuinfo/log.h>
void cpuinfo_arm64_linux_decode_isa_from_proc_cpuinfo(
uint32_t features,
uint32_t midr,
const struct cpuinfo_arm_chipset chipset[restrict static 1],
struct cpuinfo_arm_isa isa[restrict static 1])
{
if (features & CPUINFO_ARM_LINUX_FEATURE_AES) {
isa->aes = true;
}
if (features & CPUINFO_ARM_LINUX_FEATURE_PMULL) {
isa->pmull = true;
}
if (features & CPUINFO_ARM_LINUX_FEATURE_SHA1) {
isa->sha1 = true;
}
if (features & CPUINFO_ARM_LINUX_FEATURE_SHA2) {
isa->sha2 = true;
}
if (features & CPUINFO_ARM_LINUX_FEATURE_CRC32) {
isa->crc32 = true;
}
if (features & CPUINFO_ARM_LINUX_FEATURE_ATOMICS) {
isa->atomics = true;
}
const uint32_t fp16arith_mask = CPUINFO_ARM_LINUX_FEATURE_FPHP | CPUINFO_ARM_LINUX_FEATURE_ASIMDHP;
if ((features & fp16arith_mask) == fp16arith_mask) {
if (chipset->series == cpuinfo_arm_chipset_series_samsung_exynos && chipset->model == 9810) {
/* Exynos 9810 reports that it supports FP16 compute, but in fact only little cores do */
cpuinfo_log_warning("FP16 arithmetics disabled: only little cores of Exynos 9810 support FP16 compute");
} else {
isa->fp16arith = true;
}
} else if (features & CPUINFO_ARM_LINUX_FEATURE_FPHP) {
cpuinfo_log_warning("FP16 arithmetics disabled: detected support only for scalar operations");
} else if (features & CPUINFO_ARM_LINUX_FEATURE_ASIMDHP) {
cpuinfo_log_warning("FP16 arithmetics disabled: detected support only for SIMD operations");
}
/* Qualcomm Kryo 385 may have buggy kernel configuration that doesn't report VQRDMLAH/VQRDMLSH instructions */
switch (midr & (CPUINFO_ARM_MIDR_IMPLEMENTER_MASK | CPUINFO_ARM_MIDR_PART_MASK)) {
case UINT32_C(0x51008020): /* Kryo 385 Gold (Cortex-A75) */
case UINT32_C(0x51008030): /* Kryo 385 Silver (Cortex-A55) */
isa->rdm = true;
break;
default:
if (features & CPUINFO_ARM_LINUX_FEATURE_ASIMDRDM) {
isa->rdm = true;
}
break;
}
if (features & CPUINFO_ARM_LINUX_FEATURE_JSCVT) {
isa->jscvt = true;
}
if (features & CPUINFO_ARM_LINUX_FEATURE_ASIMDRDM) {
isa->rdm = true;
}
if (features & CPUINFO_ARM_LINUX_FEATURE_JSCVT) {
isa->jscvt = true;
}
if (features & CPUINFO_ARM_LINUX_FEATURE_FCMA) {
isa->fcma = true;
}
}
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