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util/cpuinfo-aarch64: Add OpenBSD support

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Signed-off-by: Brad Smith <brad@comstyle.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <ZneEh51XKhxgZKpp@humpty.home.comstyle.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Brad Smith 2024-06-22 22:12:23 -04:00 committed by Richard Henderson
parent 6527cee257
commit ab089908b4
1 changed files with 36 additions and 0 deletions
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36
util/cpuinfo-aarch64.c
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@ -20,6 +20,12 @@
#ifdef CONFIG_DARWIN
# include <sys/sysctl.h>
#endif
#ifdef __OpenBSD__
# include <machine/armreg.h>
# include <machine/cpu.h>
# include <sys/types.h>
# include <sys/sysctl.h>
#endif
unsigned cpuinfo;
@ -72,6 +78,36 @@ unsigned __attribute__((constructor)) cpuinfo_init(void)
info |= sysctl_for_bool("hw.optional.arm.FEAT_PMULL") * CPUINFO_PMULL;
info |= sysctl_for_bool("hw.optional.arm.FEAT_BTI") * CPUINFO_BTI;
#endif
#ifdef __OpenBSD__
int mib[2];
uint64_t isar0;
uint64_t pfr1;
size_t len;
mib[0] = CTL_MACHDEP;
mib[1] = CPU_ID_AA64ISAR0;
len = sizeof(isar0);
if (sysctl(mib, 2, &isar0, &len, NULL, 0) != -1) {
if (ID_AA64ISAR0_ATOMIC(isar0) >= ID_AA64ISAR0_ATOMIC_IMPL) {
info |= CPUINFO_LSE;
}
if (ID_AA64ISAR0_AES(isar0) >= ID_AA64ISAR0_AES_BASE) {
info |= CPUINFO_AES;
}
if (ID_AA64ISAR0_AES(isar0) >= ID_AA64ISAR0_AES_PMULL) {
info |= CPUINFO_PMULL;
}
}
mib[0] = CTL_MACHDEP;
mib[1] = CPU_ID_AA64PFR1;
len = sizeof(pfr1);
if (sysctl(mib, 2, &pfr1, &len, NULL, 0) != -1) {
if (ID_AA64PFR1_BT(pfr1) >= ID_AA64PFR1_BT_IMPL) {
info |= CPUINFO_BTI;
}
}
#endif
cpuinfo = info;
return info;