arch/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 #ifdef CONFIG_HAVE_MARCH_Z900_FEATURES
  31                         0,  /* N3 instructions */
  32                         1,  /* z/Arch mode installed */
  33 #endif
  34 #ifdef CONFIG_HAVE_MARCH_Z990_FEATURES
  35                         18, /* long displacement facility */
  36 #endif
  37 #ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES
  38                         21, /* extended-immediate facility */
  39                         25, /* store clock fast */
  40 #endif
  41 #ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
  42                         27, /* mvcos */
  43                         32, /* compare and swap and store */
  44                         33, /* compare and swap and store 2 */
  45                         34, /* general instructions extension */
  46                         35, /* execute extensions */
  47 #endif
  48 #ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
  49                         45, /* fast-BCR, etc. */
  50 #endif
  51 #ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
  52                         49, /* misc-instruction-extensions */
  53                         52, /* interlocked facility 2 */
  54 #endif
  55 #ifdef CONFIG_HAVE_MARCH_Z13_FEATURES
  56                         53, /* load-and-zero-rightmost-byte, etc. */
  57 #endif
  58 #ifdef CONFIG_HAVE_MARCH_Z14_FEATURES
  59                         58, /* miscellaneous-instruction-extension 2 */
  60 #endif
  61                         -1 /* END */
  62                 }
  63         },
  64         {
  65                 /*
  66                  * FACILITIES_KVM contains the list of facilities that are part
  67                  * of the default facility mask and list that are passed to the
  68                  * initial CPU model. If no CPU model is used, this, together
  69                  * with the non-hypervisor managed bits, is the maximum list of
  70                  * guest facilities supported by KVM.
  71                  */
  72                 .name = "FACILITIES_KVM",
  73                 .bits = (int[]){
  74                         0,  /* N3 instructions */
  75                         1,  /* z/Arch mode installed */
  76                         2,  /* z/Arch mode active */
  77                         3,  /* DAT-enhancement */
  78                         4,  /* idte segment table */
  79                         5,  /* idte region table */
  80                         6,  /* ASN-and-LX reuse */
  81                         7,  /* stfle */
  82                         8,  /* enhanced-DAT 1 */
  83                         9,  /* sense-running-status */
  84                         10, /* conditional sske */
  85                         13, /* ipte-range */
  86                         14, /* nonquiescing key-setting */
  87                         73, /* transactional execution */
  88                         75, /* access-exception-fetch/store indication */
  89                         76, /* msa extension 3 */
  90                         77, /* msa extension 4 */
  91                         78, /* enhanced-DAT 2 */
  92                         130, /* instruction-execution-protection */
  93                         131, /* enhanced-SOP 2 and side-effect */
  94                         139, /* multiple epoch facility */
  95                         146, /* msa extension 8 */
  96                         -1  /* END */
  97                 }
  98         },
  99         {
 100                 /*
 101                  * FACILITIES_KVM_CPUMODEL contains the list of facilities
 102                  * that can be enabled by CPU model code if the host supports
 103                  * it. These facilities are not passed to the guest without
 104                  * CPU model support.
 105                  */
 106
 107                 .name = "FACILITIES_KVM_CPUMODEL",
 108                 .bits = (int[]){
 109                         156, /* etoken facility */
 110                         -1  /* END */
 111                 }
 112         },
 113 };
 114
 115 static void print_facility_list(struct facility_def *def)
 116 {
 117         unsigned int high, bit, dword, i;
 118         unsigned long long *array;
 119
 120         array = calloc(1, 8);
 121         if (!array)
 122                 exit(EXIT_FAILURE);
 123         high = 0;
 124         for (i = 0; def->bits[i] != -1; i++) {
 125                 bit = 63 - (def->bits[i] & 63);
 126                 dword = def->bits[i] / 64;
 127                 if (dword > high) {
 128                         array = realloc(array, (dword + 1) * 8);
 129                         if (!array)
 130                                 exit(EXIT_FAILURE);
 131                         memset(array + high + 1, 0, (dword - high) * 8);
 132                         high = dword;
 133                 }
 134                 array[dword] |= 1ULL << bit;
 135         }
 136         printf("#define %s ", def->name);
 137         for (i = 0; i <= high; i++)
 138                 printf("_AC(0x%016llx,UL)%c", array[i], i < high ? ',' : '\n');
 139         free(array);
 140 }
 141
 142 static void print_facility_lists(void)
 143 {
 144         unsigned int i;
 145
 146         for (i = 0; i < sizeof(facility_defs) / sizeof(facility_defs[0]); i++)
 147                 print_facility_list(&facility_defs[i]);
 148 }
 149
 150 int main(int argc, char **argv)
 151 {
 152         printf("#ifndef __ASM_S390_FACILITY_DEFS__\n");
 153         printf("#define __ASM_S390_FACILITY_DEFS__\n");
 154         printf("/*\n");
 155         printf(" * DO NOT MODIFY.\n");
 156         printf(" *\n");
 157         printf(" * This file was generated by %s\n", __FILE__);
 158         printf(" */\n\n");
 159         printf("#include <linux/const.h>\n\n");
 160         print_facility_lists();
 161         printf("\n#endif\n");
 162         return 0;
 163 }