1 files changed, 59 insertions, 0 deletions

diff --git a/tools/perf/arch/x86/util/header.c b/tools/perf/arch/x86/util/header.c
new file mode 100644
index 000000000000..f94006068d2b
--- /dev/null
+++ b/tools/perf/arch/x86/util/header.c
@@ -0,0 +1,59 @@
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../../util/header.h"
+
+static inline void
+cpuid(unsigned int op, unsigned int *a, unsigned int *b, unsigned int *c,
+      unsigned int *d)
+{
+        __asm__ __volatile__ (".byte 0x53\n\tcpuid\n\t"
+                              "movl %%ebx, %%esi\n\t.byte 0x5b"
+                        : "=a" (*a),
+                        "=S" (*b),
+                        "=c" (*c),
+                        "=d" (*d)
+                        : "a" (op));
+}
+
+int
+get_cpuid(char *buffer, size_t sz)
+{
+        unsigned int a, b, c, d, lvl;
+        int family = -1, model = -1, step = -1;
+        int nb;
+        char vendor[16];
+
+        cpuid(0, &lvl, &b, &c, &d);
+        strncpy(&vendor[0], (char *)(&b), 4);
+        strncpy(&vendor[4], (char *)(&d), 4);
+        strncpy(&vendor[8], (char *)(&c), 4);
+        vendor[12] = '\0';
+
+        if (lvl >= 1) {
+                cpuid(1, &a, &b, &c, &d);
+
+                family = (a >> 8) & 0xf;  /* bits 11 - 8 */
+                model  = (a >> 4) & 0xf;  /* Bits  7 - 4 */
+                step   = a & 0xf;
+
+                /* extended family */
+                if (family == 0xf)
+                        family += (a >> 20) & 0xff;
+
+                /* extended model */
+                if (family >= 0x6)
+                        model += ((a >> 16) & 0xf) << 4;
+        }
+        nb = snprintf(buffer, sz, "%s,%u,%u,%u$", vendor, family, model, step);
+
+        /* look for end marker to ensure the entire data fit */
+        if (strchr(buffer, '$')) {
+                buffer[nb-1] = '\0';
+                return 0;
+        }
+        return -1;
+}