[PATCH] util/cpuinfo-aarch64: Add OpenBSD support

[Brad Smith <brad@comstyle.com>]

util/cpuinfo-aarch64: Add OpenBSD support

Signed-off-by: Brad Smith <brad@comstyle.com>
---
 util/cpuinfo-aarch64.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/util/cpuinfo-aarch64.c b/util/cpuinfo-aarch64.c
index 4c8a005715..8a8c0a30a8 100644
--- a/util/cpuinfo-aarch64.c
+++ b/util/cpuinfo-aarch64.c
@@ -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 +78,32 @@ 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;
-- 
2.45.2