1b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov/* -*- mode: C; c-basic-offset: 3; -*- */ 2b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 3b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#include <setjmp.h> 4b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#include <signal.h> 5b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#include <stdio.h> 6b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#include <stdlib.h> 7b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#include <string.h> 8b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#include <ctype.h> // isspace 9b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#include <fcntl.h> // open 10b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#include <unistd.h> // lseek 11b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#include <sys/stat.h> // S_IRUSR 12b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 13b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// This file determines s390x features a processor supports. 14b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// 15b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// We return: 16b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// - 0 if the machine provides the asked-for feature and the cpu 17b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// model, if specified, matches the machine 18b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// - 1 the machine does not provide the asked-for feature or the 19b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// cpu model, if specified, does not match the machine 20b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// - 2 if the asked-for feature isn't recognised (this will be the case for 21b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// any feature if run on a non-s390x machine). 22b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// - 2 for an unknown cpu model in /proc/cpu_info 23b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// - 3 if there was a usage error (it also prints an error message). 24b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// 25b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// USAGE: 26b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// 27b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// s390x_features <feature> [<machine-model>] 28b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// 29b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// The machine_model is optional and it can be something like: 30b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// 31b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// z9 -- Host needs to be a z9 (and nothing else) 32b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// z9: -- Host needs to be a z9 or any later model 33b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// :z9 -- Host needs to be a model up to and including z9 34b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// z900:z9 -- Host needs to be at least a z900 and at most a z9. 35b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// Any model in between is OK, too. 36b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 37b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanovjmp_buf env; 38b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 39b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#if defined(VGA_s390x) 40b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 41b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanovvoid handle_sigill(int signum) 42b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov{ 43b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov longjmp(env, 1); 44b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov} 45b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 46b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanovunsigned long long stfle(void) 47b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov{ 48b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 49b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov unsigned long long ret; 50b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 51b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov signal(SIGILL, handle_sigill); 52b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (setjmp(env)) { 53b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* stfle not available: assume no facilities */ 54b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov return 0; 55b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else { 56b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov asm volatile("lghi 0, 0\n" 57b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov ".insn s,0xb2b00000,%0\n" /* stfle */ 58b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov : "=Q" (ret)::"0", "cc"); 59b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov return ret; 60b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 61b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov} 62b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 63b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 64b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov/* Read /proc/cpuinfo. Look for lines like these 65b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 66b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov processor 0: version = FF, identification = 0117C9, machine = 2064 67b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 68b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov and return the machine model or NULL on error. 69b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov Adapted from function VG_(get_machine_model) in coregrind/m_machine.c */ 70b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 71b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanovtypedef struct { 72b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov const char *cpuinfo_name; 73b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov const char *real_name; 74b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov} model_info; 75b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 76b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov/* Array needs to be sorted chronologically. Oldest to newest */ 77b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanovmodel_info models[] = { 78b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov { "2064", "z900" }, 79b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov { "2066", "z800" }, 80b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov { "2084", "z990" }, 81b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov { "2086", "z890" }, 82b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov { "2094", "z9-ec" }, 83b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov { "2096", "z9-bc" }, 84b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov { "2097", "z10-ec" }, 85b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov { "2098", "z10-bc" }, 86b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov { "2817", "z196" }, 87b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov}; 88b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 89b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 90b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov/* Locate a machine model by name. Name can be either the cpuinfo 91b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov name or the external name. */ 92b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanovstatic model_info *locate_model(const char *name) 93b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov{ 94b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov model_info *p; 95b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 96b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* Try cpuinfo name first */ 97b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov for (p = models; p != models + sizeof models / sizeof models[0]; ++p) { 98b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (strcmp(p->cpuinfo_name, name) == 0) return p; // found it 99b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 100b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 101b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* Now try external name */ 102b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov for (p = models; p != models + sizeof models / sizeof models[0]; ++p) { 103b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (strcmp(p->real_name, name) == 0) return p; // found it 104b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 105b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 106b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov return NULL; 107b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov} 108b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 109b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 110b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanovstatic model_info *get_host(void) 111b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov{ 112b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov int n, fh; 113b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov size_t num_bytes, file_buf_size; 114b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov char *p, *m, *model_name, *file_buf; 115b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov model_info *model; 116b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 117b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* Slurp contents of /proc/cpuinfo into FILE_BUF */ 118b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov //fh = open("/proc/cpuinfo", O_RDONLY, S_IRUSR); 119b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov fh = open("/proc/cpuinfo", O_RDONLY, S_IRUSR); 120b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (fh < 0) return NULL; 121b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 122b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* Determine the size of /proc/cpuinfo. 123b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov Work around broken-ness in /proc file system implementation. 124b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov fstat returns a zero size for /proc/cpuinfo although it is 125b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov claimed to be a regular file. */ 126b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov num_bytes = 0; 127b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov file_buf_size = 1000; 128b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov file_buf = malloc(file_buf_size + 1); 129b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 130b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov while (42) { 131b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov n = read(fh, file_buf, file_buf_size); 132b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (n < 0) break; 133b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 134b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov num_bytes += n; 135b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (n < file_buf_size) break; /* reached EOF */ 136b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 137b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 138b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (n < 0) num_bytes = 0; /* read error; ignore contents */ 139b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 140b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (num_bytes > file_buf_size) { 141b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov free(file_buf); 142b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov lseek(fh, 0, SEEK_SET); 143b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov file_buf = malloc(num_bytes + 1); 144b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov n = read(fh, file_buf, num_bytes); 145b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (n < 0) num_bytes = 0; 146b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 147b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 148b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov file_buf[num_bytes] = '\0'; 149b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov close(fh); 150b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 151b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* Parse file */ 152b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov model = models + sizeof models / sizeof models[0]; 153b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov for (p = file_buf; *p; ++p) { 154b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* Beginning of line */ 155b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (strncmp(p, "processor", sizeof "processor" - 1 ) != 0) continue; 156b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 157b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov m = strstr(p, "machine"); 158b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (m == NULL) continue; 159b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 160b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov p = m + sizeof "machine" - 1; 161b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov while (isspace(*p) || *p == '=') { 162b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (*p == '\n') goto next_line; 163b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov ++p; 164b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 165b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 166b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov model_name = p; 167b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov for (n = 0; n < sizeof models / sizeof models[0]; ++n) { 168b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov model_info *mm = models + n; 169b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov size_t len = strlen(mm->cpuinfo_name); 170b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (strncmp(mm->cpuinfo_name, model_name, len) == 0 && 171b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov isspace(model_name[len])) { 172b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* In case there are different CPUs in this cluster return the 173b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov one with the dewest capabilities ("oldest" model). */ 174b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (mm < model) model = mm; 175b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov p = model_name + len; 176b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov break; 177b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 178b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 179b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* Skip until end-of-line */ 180b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov while (*p != '\n') 181b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov ++p; 182b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov next_line: ; 183b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 184b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 185b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov free(file_buf); 186b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 187b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (model == models + sizeof models / sizeof models[0]) return NULL; 188b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 189b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov return model; 190b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov} 191b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 192b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanovstatic int go(char *feature, char *cpu) 193b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov{ 194b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov unsigned long long facilities; 195b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov unsigned long long match; 196b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov model_info *host, *from, *to, *p; 197b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov char *colon; 198b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 199b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov facilities = stfle(); 200b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 201b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (strcmp(feature, "s390x-zarch") == 0 ) { 202b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov match = (facilities & (1ULL << 62) && (facilities & (1ULL << 61))); 203b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else if (strcmp(feature, "s390x-n3") == 0 ) { 204b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov match = (facilities & (1ULL << 63)); 205b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else if (strcmp(feature, "s390x-stfle") == 0 ) { 206b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov match = (facilities & (1ULL << 56)); 207b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else if (strcmp(feature, "s390x-ldisp") == 0 ) { 208b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov match = (facilities & (1ULL << 45) && (facilities & (1ULL << 44))); 209b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else if (strcmp(feature, "s390x-eimm") == 0 ) { 210b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov match = (facilities & (1ULL << 42)); 211b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else if (strcmp(feature, "s390x-stckf") == 0 ) { 212b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov match = (facilities & (1ULL << 38)); 213b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else if (strcmp(feature, "s390x-genins") == 0 ) { 214b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov match = (facilities & (1ULL << 29)); 215b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else if (strcmp(feature, "s390x-exrl") == 0 ) { 216b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov match = (facilities & (1ULL << 28)); 217b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else { 218b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov return 2; // Unrecognised feature. 219b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 220b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 221b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (match == 0) return 1; // facility not provided 222b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 223b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* Host provides facility. If no CPU was specified, we're done. */ 224b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (cpu == NULL) return 0; 225b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 226b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov host = get_host(); 227b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (host == NULL) return 2; // unknown model 228b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 229b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov // printf("host = %s (%s)\n", host->cpuinfo_name, host->real_name); 230b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 231b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* Determine interval of models in which to search for HOST. */ 232b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov from = to = NULL; 233b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov colon = strchr(cpu, ':'); 234b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 235b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (colon == NULL) { 236b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov // match exact 237b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov from = to = locate_model(cpu); 238b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else if (colon == cpu) { 239b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov // :NAME match machines up to and including CPU 240b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov from = models; 241b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov to = locate_model(cpu + 1); 242b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else if (colon[1] == '\0') { 243b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov // NAME: match machines beginning with CPU or later 244b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov *colon = '\0'; 245b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov from = locate_model(cpu); 246b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov to = models + sizeof models / sizeof models[0] - 1; 247b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov *colon = ':'; 248b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } else { 249b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov // NAME:NAME match machines in interval 250b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov *colon = '\0'; 251b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov from = locate_model(cpu); 252b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov to = locate_model(colon + 1); 253b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov *colon = ':'; 254b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 255b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 256b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (from == NULL || to == NULL || from > to) { 257b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov fprintf(stderr, "invalid cpu specification '%s'\n", cpu); 258b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov return 3; 259b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 260b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 261b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#if 0 262b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov printf("from %s (%s) to %s (%s)\n", from->cpuinfo_name, from->real_name, 263b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov to->cpuinfo_name, to->real_name); 264b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#endif 265b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 266b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov /* Search for HOST. */ 267b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov for (p = from; p <= to; ++p) { 268b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (p == host) return 0; 269b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 270b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 271b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov return 1; // host does not match CPU specification 272b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov} 273b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 274b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#else 275b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 276b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanovstatic int go(char *feature, char *cpu) 277b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov{ 278b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov return 2; // Feature not recognised (non-s390x machine!) 279b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov} 280b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 281b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov#endif 282b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 283b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 284b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov//--------------------------------------------------------------------------- 285b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// main 286b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov//--------------------------------------------------------------------------- 287b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanovint main(int argc, char **argv) 288b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov{ 289b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov int rc; 290b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 291b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov if (argc < 2 || argc > 3) { 292b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov fprintf( stderr, "usage: s390x_features <feature> [<machine-model>]\n" ); 293b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov exit(3); // Usage error. 294b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov } 295b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 296b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov rc = go(argv[1], argv[2]); 297b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 298b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov // printf("rc = %d\n", rc); 299b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov 300b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov return rc; 301b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov} 302