f33d122719
Implement the code to match CPU types to mapfile types for x86 based on CPUID. This extends an existing similar function, but changes it to use the x86 mapfile cpu description. This allows to resolve event lists generated by jevents. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Acked-by: Ingo Molnar <mingo@kernel.org> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1473978296-20712-6-git-send-email-sukadev@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
78 lines
1.5 KiB
C
78 lines
1.5 KiB
C
#include <sys/types.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../../util/header.h"
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static inline void
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cpuid(unsigned int op, unsigned int *a, unsigned int *b, unsigned int *c,
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unsigned int *d)
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{
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__asm__ __volatile__ (".byte 0x53\n\tcpuid\n\t"
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"movl %%ebx, %%esi\n\t.byte 0x5b"
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: "=a" (*a),
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"=S" (*b),
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"=c" (*c),
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"=d" (*d)
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: "a" (op));
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}
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static int
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__get_cpuid(char *buffer, size_t sz, const char *fmt)
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{
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unsigned int a, b, c, d, lvl;
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int family = -1, model = -1, step = -1;
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int nb;
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char vendor[16];
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cpuid(0, &lvl, &b, &c, &d);
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strncpy(&vendor[0], (char *)(&b), 4);
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strncpy(&vendor[4], (char *)(&d), 4);
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strncpy(&vendor[8], (char *)(&c), 4);
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vendor[12] = '\0';
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if (lvl >= 1) {
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cpuid(1, &a, &b, &c, &d);
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family = (a >> 8) & 0xf; /* bits 11 - 8 */
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model = (a >> 4) & 0xf; /* Bits 7 - 4 */
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step = a & 0xf;
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/* extended family */
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if (family == 0xf)
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family += (a >> 20) & 0xff;
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/* extended model */
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if (family >= 0x6)
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model += ((a >> 16) & 0xf) << 4;
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}
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nb = scnprintf(buffer, sz, fmt, vendor, family, model, step);
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/* look for end marker to ensure the entire data fit */
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if (strchr(buffer, '$')) {
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buffer[nb-1] = '\0';
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return 0;
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}
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return -1;
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}
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int
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get_cpuid(char *buffer, size_t sz)
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{
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return __get_cpuid(buffer, sz, "%s,%u,%u,%u$");
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}
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char *
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get_cpuid_str(void)
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{
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char *buf = malloc(128);
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if (__get_cpuid(buf, 128, "%s-%u-%X$") < 0) {
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free(buf);
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return NULL;
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}
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return buf;
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}
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