1 files changed, 64 insertions, 0 deletions
diff --git a/util/cpuinfo-ppc.c b/util/cpuinfo-ppc.c
new file mode 100644
index 0000000000..7212afa45d
--- /dev/null
+++ b/util/cpuinfo-ppc.c
@@ -0,0 +1,64 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ * Host specific cpu indentification for ppc.
+ */
+
+#include "qemu/osdep.h"
+#include "host/cpuinfo.h"
+
+#ifdef CONFIG_GETAUXVAL
+# include <sys/auxv.h>
+#else
+# include <asm/cputable.h>
+# include "elf.h"
+#endif
+
+unsigned cpuinfo;
+
+/* Called both as constructor and (possibly) via other constructors. */
+unsigned __attribute__((constructor)) cpuinfo_init(void)
+{
+    unsigned info = cpuinfo;
+    unsigned long hwcap, hwcap2;
+
+    if (info) {
+        return info;
+    }
+
+    hwcap = qemu_getauxval(AT_HWCAP);
+    hwcap2 = qemu_getauxval(AT_HWCAP2);
+    info = CPUINFO_ALWAYS;
+
+    /* Version numbers are monotonic, and so imply all lower versions. */
+    if (hwcap2 & PPC_FEATURE2_ARCH_3_1) {
+        info |= CPUINFO_V3_1 | CPUINFO_V3_0 | CPUINFO_V2_07 | CPUINFO_V2_06;
+    } else if (hwcap2 & PPC_FEATURE2_ARCH_3_00) {
+        info |= CPUINFO_V3_0 | CPUINFO_V2_07 | CPUINFO_V2_06;
+    } else if (hwcap2 & PPC_FEATURE2_ARCH_2_07) {
+        info |= CPUINFO_V2_07 | CPUINFO_V2_06;
+    } else if (hwcap & PPC_FEATURE_ARCH_2_06) {
+        info |= CPUINFO_V2_06;
+    }
+
+    if (hwcap2 & PPC_FEATURE2_HAS_ISEL) {
+        info |= CPUINFO_ISEL;
+    }
+    if (hwcap & PPC_FEATURE_HAS_ALTIVEC) {
+        info |= CPUINFO_ALTIVEC;
+        /* We only care about the portion of VSX that overlaps Altivec. */
+        if (hwcap & PPC_FEATURE_HAS_VSX) {
+            info |= CPUINFO_VSX;
+            /*
+             * We use VSX especially for little-endian, but we should
+             * always have both anyway, since VSX came with Power7
+             * and crypto came with Power8.
+             */
+            if (hwcap2 & PPC_FEATURE2_HAS_VEC_CRYPTO) {
+                info |= CPUINFO_CRYPTO;
+            }
+        }
+    }
+
+    cpuinfo = info;
+    return info;
+}