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CPU extension detection for arm64 on NetBSD. #1876

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CPU extension detection for arm64 on NetBSD. #1876

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fc53c7e
CPU extension detection for arm64 on NetBSD.
loganaden Jul 30, 2024
5e79056
Fix styling issues reported by Jason Goertzen
loganaden Jul 30, 2024
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42 changes: 42 additions & 0 deletions src/common/common.c
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Original file line number Diff line number Diff line change
Expand Up @@ -139,6 +139,48 @@ static void set_available_cpu_extensions(void) {
}
#endif
}
#elif defined(__NetBSD__) || defined(__NetBSD)
#include <sys/param.h>
#include <sys/sysctl.h>
#include <aarch64/armreg.h>

static void set_available_cpu_extensions(void) {
/* mark that this function has been called */
cpu_ext_data[OQS_CPU_EXT_INIT] = 1;
unsigned int cpu=0;
size_t len;
char impl_buf[8];
int mib[2], ncpu;

mib[0] = CTL_HW;
mib[1] = HW_NCPU;
len = sizeof(ncpu);
if (sysctl(mib, 2, &ncpu, &len, NULL, 0) != 0) {
fprintf(stderr, "Error getting HWCAP for ARM on NetBSD\n");
return;
}

char path[128];
struct aarch64_sysctl_cpu_id id;

len = sizeof id;
snprintf(path, sizeof path, "machdep.cpu%d.cpu_id", cpu);
if (sysctlbyname(path, &id, &len, NULL, 0) != 0) {
fprintf(stderr, "Error getting HWCAP for ARM on NetBSD\n");
return;
}

/* extensions from aarch64-option-extensions.def */
if (__SHIFTOUT(id.ac_aa64pfr0, ID_AA64PFR0_EL1_ADVSIMD) == ID_AA64PFR0_EL1_ADV_SIMD_IMPL)
cpu_ext_data[OQS_CPU_EXT_ARM_NEON] = 1;
if (__SHIFTOUT(id.ac_aa64isar0, ID_AA64ISAR0_EL1_AES) == ID_AA64ISAR0_EL1_AES_AES)
cpu_ext_data[OQS_CPU_EXT_ARM_AES] = 1;
if ((__SHIFTOUT(id.ac_aa64isar0, ID_AA64ISAR0_EL1_SHA2) & ID_AA64ISAR0_EL1_SHA2_SHA256HSU) != 0)
cpu_ext_data[OQS_CPU_EXT_ARM_SHA2] = 1;
if ((__SHIFTOUT(id.ac_aa64isar0, ID_AA64ISAR0_EL1_SHA3) & ID_AA64ISAR0_EL1_SHA3_EOR3) != 0)
cpu_ext_data[OQS_CPU_EXT_ARM_SHA3] = 1;
}

#elif defined(_WIN32)
static void set_available_cpu_extensions(void) {
/* mark that this function has been called */
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