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x86_cpuid_info.h File Reference
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Functions

int _x86_cache_info (PAPI_mh_info_t *mh_info)
 
int _x86_detect_hypervisor (char *vendor_name)
 

Function Documentation

int _x86_cache_info ( PAPI_mh_info_t mh_info)

Definition at line 50 of file x86_cpuid_info.c.

51 {
52  int retval = 0;
53  union
54  {
55  struct
56  {
57  unsigned int ax, bx, cx, dx;
58  } e;
59  char vendor[20]; /* leave room for terminator bytes */
60  } reg;
61 
62  /* Don't use cpu_type to determine the processor.
63  * get the information directly from the chip.
64  */
65  reg.e.ax = 0; /* function code 0: vendor string */
66  /* The vendor string is composed of EBX:EDX:ECX.
67  * by swapping the register addresses in the call below,
68  * the string is correctly composed in the char array.
69  */
70  cpuid( &reg.e.ax, &reg.e.bx, &reg.e.dx, &reg.e.cx );
71  reg.vendor[16] = 0;
72  MEMDBG( "Vendor: %s\n", &reg.vendor[4] );
73 
74  init_mem_hierarchy( mh_info );
75 
76  if ( !strncmp( "GenuineIntel", &reg.vendor[4], 12 ) ) {
77  init_intel( mh_info, &mh_info->levels);
78  } else if ( !strncmp( "AuthenticAMD", &reg.vendor[4], 12 ) ) {
79  init_amd( mh_info, &mh_info->levels );
80  } else {
81  MEMDBG( "Unsupported cpu type; Not Intel or AMD x86\n" );
82  return PAPI_ENOIMPL;
83  }
84 
85  /* This works only because an empty cache element is initialized to 0 */
86  MEMDBG( "Detected L1: %d L2: %d L3: %d\n",
87  mh_info->level[0].cache[0].size + mh_info->level[0].cache[1].size,
88  mh_info->level[1].cache[0].size + mh_info->level[1].cache[1].size,
89  mh_info->level[2].cache[0].size + mh_info->level[2].cache[1].size );
90  return retval;
91 }
int levels
Definition: papi.h:774
static void cpuid(unsigned int *a, unsigned int *b, unsigned int *c, unsigned int *d)
static int init_intel(PAPI_mh_info_t *mh_info, int *levels)
PAPI_mh_cache_info_t cache[PAPI_MH_MAX_LEVELS]
Definition: papi.h:768
PAPI_mh_level_t level[PAPI_MAX_MEM_HIERARCHY_LEVELS]
Definition: papi.h:775
static void init_mem_hierarchy(PAPI_mh_info_t *mh_info)
#define MEMDBG(format, args...)
Definition: papi_debug.h:70
#define PAPI_ENOIMPL
Definition: papi.h:272
ssize_t retval
Definition: libasync.c:338
static int init_amd(PAPI_mh_info_t *mh_info, int *levels)

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int _x86_detect_hypervisor ( char *  vendor_name)

Definition at line 1507 of file x86_cpuid_info.c.

1508 {
1509  unsigned int eax, ebx, ecx, edx;
1510  char hyper_vendor_id[13];
1511 
1512  cpuid2(&eax, &ebx, &ecx, &edx,0x1,0);
1513  /* This is the hypervisor bit, ecx bit 31 */
1514  if (ecx&0x80000000) {
1515  /* There are various values in the 0x4000000X range */
1516  /* It is questionable how standard they are */
1517  /* For now we just return the name. */
1518  cpuid2(&eax, &ebx, &ecx, &edx, 0x40000000,0);
1519  memcpy(hyper_vendor_id + 0, &ebx, 4);
1520  memcpy(hyper_vendor_id + 4, &ecx, 4);
1521  memcpy(hyper_vendor_id + 8, &edx, 4);
1522  hyper_vendor_id[12] = '\0';
1523  strncpy(vendor_name,hyper_vendor_id,PAPI_MAX_STR_LEN);
1524  return 1;
1525  }
1526  else {
1527  strncpy(vendor_name,"none",PAPI_MAX_STR_LEN);
1528  }
1529  return 0;
1530 }
static void cpuid2(unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx, unsigned int index, unsigned int ecx_in)
#define PAPI_MAX_STR_LEN
Definition: papi.h:465

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