arch/s390/tools/gen_facilities.c

   1 /*
   2  * Simple program to generate defines out of facility lists that use the bit
   3  * numbering scheme from the Princples of Operations: most significant bit
   4  * has bit number 0.
   5  *
   6  *    Copyright IBM Corp. 2015
   7  *
   8  */
   9
  10 #include <strings.h>
  11 #include <string.h>
  12 #include <stdlib.h>
  13 #include <stdio.h>
  14
  15 struct facility_def {
  16         char *name;
  17         int *bits;
  18 };
  19
  20 static struct facility_def facility_defs[] = {
  21         {
  22                 /*
  23                  * FACILITIES_ALS contains the list of facilities that are
  24                  * required to run a kernel that is compiled e.g. with
  25                  * -march=<machine>.
  26                  */
  27                 .name = "FACILITIES_ALS",
  28                 .bits = (int[]){
  29 #ifdef CONFIG_HAVE_MARCH_Z900_FEATURES
  30                         0,  /* N3 instructions */
  31                         1,  /* z/Arch mode installed */
  32 #endif
  33 #ifdef CONFIG_HAVE_MARCH_Z990_FEATURES
  34                         18, /* long displacement facility */
  35 #endif
  36 #ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES
  37                         7,  /* stfle */
  38                         17, /* message security assist */
  39                         21, /* extended-immediate facility */
  40                         25, /* store clock fast */
  41 #endif
  42 #ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
  43                         27, /* mvcos */
  44                         32, /* compare and swap and store */
  45                         33, /* compare and swap and store 2 */
  46                         34, /* general extension facility */
  47                         35, /* execute extensions */
  48 #endif
  49 #ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
  50                         45, /* fast-BCR, etc. */
  51 #endif
  52 #ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
  53                         49, /* misc-instruction-extensions */
  54                         52, /* interlocked facility 2 */
  55 #endif
  56 #ifdef CONFIG_HAVE_MARCH_Z13_FEATURES
  57                         53, /* load-and-zero-rightmost-byte, etc. */
  58 #endif
  59                         -1 /* END */
  60                 }
  61         },
  62         {
  63                 .name = "FACILITIES_KVM",
  64                 .bits = (int[]){
  65                         0,  /* N3 instructions */
  66                         1,  /* z/Arch mode installed */
  67                         2,  /* z/Arch mode active */
  68                         3,  /* DAT-enhancement */
  69                         4,  /* idte segment table */
  70                         5,  /* idte region table */
  71                         6,  /* ASN-and-LX reuse */
  72                         7,  /* stfle */
  73                         8,  /* enhanced-DAT 1 */
  74                         9,  /* sense-running-status */
  75                         10, /* conditional sske */
  76                         13, /* ipte-range */
  77                         14, /* nonquiescing key-setting */
  78                         73, /* transactional execution */
  79                         75, /* access-exception-fetch/store indication */
  80                         76, /* msa extension 3 */
  81                         77, /* msa extension 4 */
  82                         78, /* enhanced-DAT 2 */
  83                         -1  /* END */
  84                 }
  85         },
  86 };
  87
  88 static void print_facility_list(struct facility_def *def)
  89 {
  90         unsigned int high, bit, dword, i;
  91         unsigned long long *array;
  92
  93         array = calloc(1, 8);
  94         if (!array)
  95                 exit(EXIT_FAILURE);
  96         high = 0;
  97         for (i = 0; def->bits[i] != -1; i++) {
  98                 bit = 63 - (def->bits[i] & 63);
  99                 dword = def->bits[i] / 64;
 100                 if (dword > high) {
 101                         array = realloc(array, (dword + 1) * 8);
 102                         if (!array)
 103                                 exit(EXIT_FAILURE);
 104                         memset(array + high + 1, 0, (dword - high) * 8);
 105                         high = dword;
 106                 }
 107                 array[dword] |= 1ULL << bit;
 108         }
 109         printf("#define %s ", def->name);
 110         for (i = 0; i <= high; i++)
 111                 printf("_AC(0x%016llx,UL)%c", array[i], i < high ? ',' : '\n');
 112         free(array);
 113 }
 114
 115 static void print_facility_lists(void)
 116 {
 117         unsigned int i;
 118
 119         for (i = 0; i < sizeof(facility_defs) / sizeof(facility_defs[0]); i++)
 120                 print_facility_list(&facility_defs[i]);
 121 }
 122
 123 int main(int argc, char **argv)
 124 {
 125         printf("#ifndef __ASM_S390_FACILITIES__\n");
 126         printf("#define __ASM_S390_FACILITIES__\n");
 127         printf("/*\n");
 128         printf(" * DO NOT MODIFY.\n");
 129         printf(" *\n");
 130         printf(" * This file was generated by %s\n", __FILE__);
 131         printf(" */\n\n");
 132         printf("#include <linux/const.h>\n\n");
 133         print_facility_lists();
 134         printf("\n#endif\n");
 135         return 0;
 136 }