s390/tools/gen_facilities.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Simple program to generate defines out of facility lists that use the bit
   4  * numbering scheme from the Princples of Operations: most significant bit
   5  * has bit number 0.
   6  *
   7  *    Copyright IBM Corp. 2015, 2018
   8  *
   9  */
  10
  11 #include <strings.h>
  12 #include <string.h>
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15
  16 struct facility_def {
  17         char *name;
  18         int *bits;
  19 };
  20
  21 static struct facility_def facility_defs[] = {
  22         {
  23                 /*
  24                  * FACILITIES_ALS contains the list of facilities that are
  25                  * required to run a kernel that is compiled e.g. with
  26                  * -march=<machine>.
  27                  */
  28                 .name = "FACILITIES_ALS",
  29                 .bits = (int[]){
  30                         0,  /* N3 instructions */
  31                         1,  /* z/Arch mode installed */
  32                         18, /* long displacement facility */
  33                         21, /* extended-immediate facility */
  34                         25, /* store clock fast */
  35                         27, /* mvcos */
  36                         32, /* compare and swap and store */
  37                         33, /* compare and swap and store 2 */
  38                         34, /* general instructions extension */
  39                         35, /* execute extensions */
  40 #ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
  41                         45, /* fast-BCR, etc. */
  42 #endif
  43 #ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
  44                         49, /* misc-instruction-extensions */
  45                         52, /* interlocked facility 2 */
  46 #endif
  47 #ifdef CONFIG_HAVE_MARCH_Z13_FEATURES
  48                         53, /* load-and-zero-rightmost-byte, etc. */
  49 #endif
  50 #ifdef CONFIG_HAVE_MARCH_Z14_FEATURES
  51                         58, /* miscellaneous-instruction-extension 2 */
  52 #endif
  53 #ifdef CONFIG_HAVE_MARCH_Z15_FEATURES
  54                         61, /* miscellaneous-instruction-extension 3 */
  55 #endif
  56                         -1 /* END */
  57                 }
  58         },
  59         {
  60                 /*
  61                  * FACILITIES_KVM contains the list of facilities that are part
  62                  * of the default facility mask and list that are passed to the
  63                  * initial CPU model. If no CPU model is used, this, together
  64                  * with the non-hypervisor managed bits, is the maximum list of
  65                  * guest facilities supported by KVM.
  66                  */
  67                 .name = "FACILITIES_KVM",
  68                 .bits = (int[]){
  69                         0,  /* N3 instructions */
  70                         1,  /* z/Arch mode installed */
  71                         2,  /* z/Arch mode active */
  72                         3,  /* DAT-enhancement */
  73                         4,  /* idte segment table */
  74                         5,  /* idte region table */
  75                         6,  /* ASN-and-LX reuse */
  76                         7,  /* stfle */
  77                         8,  /* enhanced-DAT 1 */
  78                         9,  /* sense-running-status */
  79                         10, /* conditional sske */
  80                         13, /* ipte-range */
  81                         14, /* nonquiescing key-setting */
  82                         73, /* transactional execution */
  83                         75, /* access-exception-fetch/store indication */
  84                         76, /* msa extension 3 */
  85                         77, /* msa extension 4 */
  86                         78, /* enhanced-DAT 2 */
  87                         130, /* instruction-execution-protection */
  88                         131, /* enhanced-SOP 2 and side-effect */
  89                         139, /* multiple epoch facility */
  90                         146, /* msa extension 8 */
  91                         150, /* enhanced sort */
  92                         151, /* deflate conversion */
  93                         155, /* msa extension 9 */
  94                         -1  /* END */
  95                 }
  96         },
  97         {
  98                 /*
  99                  * FACILITIES_KVM_CPUMODEL contains the list of facilities
 100                  * that can be enabled by CPU model code if the host supports
 101                  * it. These facilities are not passed to the guest without
 102                  * CPU model support.
 103                  */
 104
 105                 .name = "FACILITIES_KVM_CPUMODEL",
 106                 .bits = (int[]){
 107                         12, /* AP Query Configuration Information */
 108                         15, /* AP Facilities Test */
 109                         156, /* etoken facility */
 110                         165, /* nnpa facility */
 111                         193, /* bear enhancement facility */
 112                         194, /* rdp enhancement facility */
 113                         196, /* processor activity instrumentation facility */
 114                         197, /* processor activity instrumentation extension 1 */
 115                         -1  /* END */
 116                 }
 117         },
 118 };
 119
 120 static void print_facility_list(struct facility_def *def)
 121 {
 122         unsigned int high, bit, dword, i;
 123         unsigned long long *array;
 124
 125         array = calloc(1, 8);
 126         if (!array)
 127                 exit(EXIT_FAILURE);
 128         high = 0;
 129         for (i = 0; def->bits[i] != -1; i++) {
 130                 bit = 63 - (def->bits[i] & 63);
 131                 dword = def->bits[i] / 64;
 132                 if (dword > high) {
 133                         array = realloc(array, (dword + 1) * 8);
 134                         if (!array)
 135                                 exit(EXIT_FAILURE);
 136                         memset(array + high + 1, 0, (dword - high) * 8);
 137                         high = dword;
 138                 }
 139                 array[dword] |= 1ULL << bit;
 140         }
 141         printf("#define %s ", def->name);
 142         for (i = 0; i <= high; i++)
 143                 printf("_AC(0x%016llx,UL)%c", array[i], i < high ? ',' : '\n');
 144         free(array);
 145 }
 146
 147 static void print_facility_lists(void)
 148 {
 149         unsigned int i;
 150
 151         for (i = 0; i < sizeof(facility_defs) / sizeof(facility_defs[0]); i++)
 152                 print_facility_list(&facility_defs[i]);
 153 }
 154
 155 int main(int argc, char **argv)
 156 {
 157         printf("#ifndef __ASM_S390_FACILITY_DEFS__\n");
 158         printf("#define __ASM_S390_FACILITY_DEFS__\n");
 159         printf("/*\n");
 160         printf(" * DO NOT MODIFY.\n");
 161         printf(" *\n");
 162         printf(" * This file was generated by %s\n", __FILE__);
 163         printf(" */\n\n");
 164         printf("#include <linux/const.h>\n\n");
 165         print_facility_lists();
 166         printf("\n#endif\n");
 167         return 0;
 168 }