1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2016 SAP SE. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "asm/assembler.inline.hpp"
  28 #include "compiler/disassembler.hpp"
  29 #include "code/compiledIC.hpp"
  30 #include "memory/resourceArea.hpp"
  31 #include "runtime/java.hpp"
  32 #include "runtime/stubCodeGenerator.hpp"
  33 #include "vm_version_s390.hpp"
  34 
  35 # include <sys/sysinfo.h>
  36 
  37 bool VM_Version::_is_determine_features_test_running  = false;
  38 
  39 unsigned long VM_Version::_features[_features_buffer_len]           = {0, 0, 0, 0};
  40 unsigned long VM_Version::_cipher_features[_features_buffer_len]    = {0, 0, 0, 0};
  41 unsigned long VM_Version::_msgdigest_features[_features_buffer_len] = {0, 0, 0, 0};
  42 unsigned int  VM_Version::_nfeatures                                = 0;
  43 unsigned int  VM_Version::_ncipher_features                         = 0;
  44 unsigned int  VM_Version::_nmsgdigest_features                      = 0;
  45 unsigned int  VM_Version::_Dcache_lineSize                          = 256;
  46 unsigned int  VM_Version::_Icache_lineSize                          = 256;
  47 
  48 static const char* z_gen[]     = {"  ",   "G1",   "G2", "G3",    "G4",     "G5",      "G6",   "G7"   };
  49 static const char* z_machine[] = {"  ", "2064", "2084", "2094",  "2097",   "2817",    "  ",   "2964" };
  50 static const char* z_name[]    = {"  ", "z900", "z990", "z9 EC", "z10 EC", "z196 EC", "ec12", "z13"  };
  51 
  52 void VM_Version::initialize() {
  53   determine_features();      // Get processor capabilities.
  54   set_features_string();     // Set a descriptive feature indication.
  55 
  56   if (Verbose) {
  57     print_features();
  58   }
  59 
  60   intx cache_line_size = Dcache_lineSize(0);
  61 
  62   MaxVectorSize = 8;
  63 
  64   if (has_PrefetchRaw()) {
  65     if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) {  // not preset
  66       // 0 = no prefetch.
  67       // 1 = Prefetch instructions for each allocation.
  68       // 2 = Use TLAB watermark to gate allocation prefetch.
  69       AllocatePrefetchStyle = 1;
  70     }
  71 
  72     if (AllocatePrefetchStyle > 0) {  // Prefetching turned on at all?
  73       // Distance to prefetch ahead of allocation pointer.
  74       if (FLAG_IS_DEFAULT(AllocatePrefetchDistance) || (AllocatePrefetchDistance < 0)) {  // not preset
  75         AllocatePrefetchDistance = 0;
  76       }
  77 
  78       // Number of lines to prefetch ahead of allocation pointer.
  79       if (FLAG_IS_DEFAULT(AllocatePrefetchLines) || (AllocatePrefetchLines <= 0)) {      // not preset
  80         AllocatePrefetchLines = 3;
  81       }
  82 
  83       // Step size in bytes of sequential prefetch instructions.
  84       if (FLAG_IS_DEFAULT(AllocatePrefetchStepSize) || (AllocatePrefetchStepSize <= 0)) { // not preset
  85         FLAG_SET_DEFAULT(AllocatePrefetchStepSize, cache_line_size);
  86       } else if (AllocatePrefetchStepSize < cache_line_size) {
  87         FLAG_SET_DEFAULT(AllocatePrefetchStepSize, cache_line_size);
  88       } else {
  89         FLAG_SET_DEFAULT(AllocatePrefetchStepSize, cache_line_size);
  90       }
  91     } else {
  92       FLAG_SET_DEFAULT(AllocatePrefetchStyle, 0);
  93       AllocatePrefetchDistance = 0;
  94       AllocatePrefetchLines    = 0;
  95       // Can't be zero. Will SIGFPE during constraints checking.
  96       FLAG_SET_DEFAULT(AllocatePrefetchStepSize, cache_line_size);
  97     }
  98 
  99   } else {
 100     FLAG_SET_DEFAULT(AllocatePrefetchStyle, 0);
 101     AllocatePrefetchDistance = 0;
 102     AllocatePrefetchLines    = 0;
 103     // Can't be zero. Will SIGFPE during constraints checking.
 104     FLAG_SET_DEFAULT(AllocatePrefetchStepSize, cache_line_size);
 105   }
 106 
 107   // TODO:
 108   // On z/Architecture, cache line size is significantly large (256 bytes). Do we really need
 109   // to keep contended members that far apart? Performance tests are required.
 110   if (FLAG_IS_DEFAULT(ContendedPaddingWidth) && (cache_line_size > ContendedPaddingWidth)) {
 111     ContendedPaddingWidth = cache_line_size;
 112   }
 113 
 114   // On z/Architecture, the CRC32 intrinsics had to be implemented "by hand".
 115   // They cannot be based on the CHECKSUM instruction which has been there
 116   // since the very beginning (of z/Architecture). It computes "some kind of" a checksum
 117   // which has nothing to do with the CRC32 algorithm.
 118   if (FLAG_IS_DEFAULT(UseCRC32Intrinsics)) {
 119     FLAG_SET_DEFAULT(UseCRC32Intrinsics, true);
 120   }
 121 
 122   // On z/Architecture, we take UseAES as the general switch to enable/disable the AES intrinsics.
 123   // The specific, and yet to be defined, switches UseAESxxxIntrinsics will then be set
 124   // depending on the actual machine capabilities.
 125   // Explicitly setting them via CmdLine option takes precedence, of course.
 126   // TODO: UseAESIntrinsics must be made keylength specific.
 127   // As of March 2015 and Java8, only AES128 is supported by the Java Cryptographic Extensions.
 128   // Therefore, UseAESIntrinsics is of minimal use at the moment.
 129   if (FLAG_IS_DEFAULT(UseAES) && has_Crypto_AES()) {
 130     FLAG_SET_DEFAULT(UseAES, true);
 131   }
 132   if (UseAES && !has_Crypto_AES()) {
 133     warning("AES instructions are not available on this CPU");
 134     FLAG_SET_DEFAULT(UseAES, false);
 135   }
 136   if (UseAES) {
 137     if (FLAG_IS_DEFAULT(UseAESIntrinsics)) {
 138       FLAG_SET_DEFAULT(UseAESIntrinsics, true);
 139     }
 140   }
 141   if (UseAESIntrinsics && !has_Crypto_AES()) {
 142     warning("AES intrinsics are not available on this CPU");
 143     FLAG_SET_DEFAULT(UseAESIntrinsics, false);
 144   }
 145 
 146   // TODO: implement AES/CTR intrinsics
 147   if (UseAESCTRIntrinsics) {
 148     warning("AES/CTR intrinsics are not available on this CPU");
 149     FLAG_SET_DEFAULT(UseAESCTRIntrinsics, false);
 150   }
 151 
 152   // TODO: implement GHASH intrinsics
 153   if (UseGHASHIntrinsics) {
 154     warning("GHASH intrinsics are not available on this CPU");
 155     FLAG_SET_DEFAULT(UseGHASHIntrinsics, false);
 156   }
 157 
 158   if (UseFMA) {
 159     warning("FMA instructions are not available on this CPU");
 160     FLAG_SET_DEFAULT(UseFMA, false);
 161   }
 162 
 163   // On z/Architecture, we take UseSHA as the general switch to enable/disable the SHA intrinsics.
 164   // The specific switches UseSHAxxxIntrinsics will then be set depending on the actual
 165   // machine capabilities.
 166   // Explicitly setting them via CmdLine option takes precedence, of course.
 167   if (FLAG_IS_DEFAULT(UseSHA) && has_Crypto_SHA()) {
 168     FLAG_SET_DEFAULT(UseSHA, true);
 169   }
 170   if (UseSHA && !has_Crypto_SHA()) {
 171     warning("SHA instructions are not available on this CPU");
 172     FLAG_SET_DEFAULT(UseSHA, false);
 173   }
 174   if (UseSHA && has_Crypto_SHA1()) {
 175     if (FLAG_IS_DEFAULT(UseSHA1Intrinsics)) {
 176       FLAG_SET_DEFAULT(UseSHA1Intrinsics, true);
 177     }
 178   } else if (UseSHA1Intrinsics) {
 179     warning("Intrinsics for SHA-1 crypto hash functions not available on this CPU.");
 180     FLAG_SET_DEFAULT(UseSHA1Intrinsics, false);
 181   }
 182   if (UseSHA && has_Crypto_SHA256()) {
 183     if (FLAG_IS_DEFAULT(UseSHA256Intrinsics)) {
 184       FLAG_SET_DEFAULT(UseSHA256Intrinsics, true);
 185     }
 186   } else if (UseSHA256Intrinsics) {
 187     warning("Intrinsics for SHA-224 and SHA-256 crypto hash functions not available on this CPU.");
 188     FLAG_SET_DEFAULT(UseSHA256Intrinsics, false);
 189   }
 190   if (UseSHA && has_Crypto_SHA512()) {
 191     if (FLAG_IS_DEFAULT(UseSHA512Intrinsics)) {
 192       FLAG_SET_DEFAULT(UseSHA512Intrinsics, true);
 193     }
 194   } else if (UseSHA512Intrinsics) {
 195     warning("Intrinsics for SHA-384 and SHA-512 crypto hash functions not available on this CPU.");
 196     FLAG_SET_DEFAULT(UseSHA512Intrinsics, false);
 197   }
 198 
 199   if (UseAdler32Intrinsics) {
 200     warning("Adler32Intrinsics not available on this CPU.");
 201     FLAG_SET_DEFAULT(UseAdler32Intrinsics, false);
 202   }
 203 
 204   if (FLAG_IS_DEFAULT(UseMultiplyToLenIntrinsic)) {
 205     FLAG_SET_DEFAULT(UseMultiplyToLenIntrinsic, true);
 206   }
 207   if (FLAG_IS_DEFAULT(UseMontgomeryMultiplyIntrinsic)) {
 208     FLAG_SET_DEFAULT(UseMontgomeryMultiplyIntrinsic, true);
 209   }
 210   if (FLAG_IS_DEFAULT(UseMontgomerySquareIntrinsic)) {
 211     FLAG_SET_DEFAULT(UseMontgomerySquareIntrinsic, true);
 212   }
 213   if (FLAG_IS_DEFAULT(UsePopCountInstruction)) {
 214     FLAG_SET_DEFAULT(UsePopCountInstruction, true);
 215   }
 216 
 217   // z/Architecture supports 8-byte compare-exchange operations
 218   // (see Atomic::cmpxchg and StubGenerator::generate_atomic_cmpxchg_ptr)
 219   // and 'atomic long memory ops' (see Unsafe_GetLongVolatile).
 220   _supports_cx8 = true;
 221 
 222   _supports_atomic_getadd4 = VM_Version::has_LoadAndALUAtomicV1();
 223   _supports_atomic_getadd8 = VM_Version::has_LoadAndALUAtomicV1();
 224 
 225   // z/Architecture supports unaligned memory accesses.
 226   // Performance penalty is negligible. An additional tick or so
 227   // is lost if the accessed data spans a cache line boundary.
 228   // Unaligned accesses are not atomic, of course.
 229   if (FLAG_IS_DEFAULT(UseUnalignedAccesses)) {
 230     FLAG_SET_DEFAULT(UseUnalignedAccesses, true);
 231   }
 232 }
 233 
 234 
 235 void VM_Version::set_features_string() {
 236 
 237   unsigned int ambiguity = 0;
 238   if (is_z13()) {
 239     _features_string = "System z G7-z13  (LDISP_fast, ExtImm, PCrel Load/Store, CmpB, Cond Load/Store, Interlocked Update, TxM, VectorInstr)";
 240     ambiguity++;
 241   }
 242   if (is_ec12()) {
 243     _features_string = "System z G6-EC12 (LDISP_fast, ExtImm, PCrel Load/Store, CmpB, Cond Load/Store, Interlocked Update, TxM)";
 244     ambiguity++;
 245   }
 246   if (is_z196()) {
 247     _features_string = "System z G5-z196 (LDISP_fast, ExtImm, PCrel Load/Store, CmpB, Cond Load/Store, Interlocked Update)";
 248     ambiguity++;
 249   }
 250   if (is_z10()) {
 251     _features_string = "System z G4-z10  (LDISP_fast, ExtImm, PCrel Load/Store, CmpB)";
 252     ambiguity++;
 253   }
 254   if (is_z9()) {
 255     _features_string = "System z G3-z9   (LDISP_fast, ExtImm), out-of-support as of 2016-04-01";
 256     ambiguity++;
 257   }
 258   if (is_z990()) {
 259     _features_string = "System z G2-z990 (LDISP_fast), out-of-support as of 2014-07-01";
 260     ambiguity++;
 261   }
 262   if (is_z900()) {
 263     _features_string = "System z G1-z900 (LDISP), out-of-support as of 2014-07-01";
 264     ambiguity++;
 265   }
 266 
 267   if (ambiguity == 0) {
 268     _features_string = "z/Architecture (unknown generation)";
 269   } else if (ambiguity > 1) {
 270     tty->print_cr("*** WARNING *** Ambiguous z/Architecture detection, ambiguity = %d", ambiguity);
 271     tty->print_cr("                oldest detected generation is %s", _features_string);
 272     _features_string = "z/Architecture (ambiguous detection)";
 273   }
 274 
 275   if (has_Crypto_AES()) {
 276     char buf[256];
 277     assert(strlen(_features_string) + 4 + 3*4 + 1 < sizeof(buf), "increase buffer size");
 278     jio_snprintf(buf, sizeof(buf), "%s aes%s%s%s", // String 'aes' must be surrounded by spaces so that jtreg tests recognize it.
 279                  _features_string,
 280                  has_Crypto_AES128() ? " 128" : "",
 281                  has_Crypto_AES192() ? " 192" : "",
 282                  has_Crypto_AES256() ? " 256" : "");
 283     _features_string = os::strdup(buf);
 284   }
 285 
 286   if (has_Crypto_SHA()) {
 287     char buf[256];
 288     assert(strlen(_features_string) + 4 + 2 + 2*4 + 6 + 1 < sizeof(buf), "increase buffer size");
 289     // String 'sha1' etc must be surrounded by spaces so that jtreg tests recognize it.
 290     jio_snprintf(buf, sizeof(buf), "%s %s%s%s%s",
 291                  _features_string,
 292                  has_Crypto_SHA1()   ? " sha1"   : "",
 293                  has_Crypto_SHA256() ? " sha256" : "",
 294                  has_Crypto_SHA512() ? " sha512" : "",
 295                  has_Crypto_GHASH()  ? " ghash"  : "");
 296     if (has_Crypto_AES()) { os::free((void *)_features_string); }
 297     _features_string = os::strdup(buf);
 298   }
 299 }
 300 
 301 // featureBuffer - bit array indicating availability of various features
 302 // featureNum    - bit index of feature to be tested
 303 //                 Featurenum < 0 requests test for any nonzero bit in featureBuffer.
 304 // bufLen        - length of featureBuffer in bits
 305 bool VM_Version::test_feature_bit(unsigned long* featureBuffer, int featureNum, unsigned int bufLen) {
 306   assert(bufLen > 0,             "buffer len must be positive");
 307   assert((bufLen & 0x0007) == 0, "unaligned buffer len");
 308   assert(((intptr_t)featureBuffer&0x0007) == 0, "unaligned feature buffer");
 309   if (featureNum < 0) {
 310     // Any bit set at all?
 311     bool anyBit = false;
 312     for (size_t i = 0; i < bufLen/(8*sizeof(long)); i++) {
 313       anyBit = anyBit || (featureBuffer[i] != 0);
 314     }
 315     return anyBit;
 316   } else {
 317     assert((unsigned int)featureNum < bufLen,    "feature index out of range");
 318     unsigned char* byteBuffer = (unsigned char*)featureBuffer;
 319     int   byteIndex  = featureNum/(8*sizeof(char));
 320     int   bitIndex   = featureNum%(8*sizeof(char));
 321     // Indexed bit set?
 322     return (byteBuffer[byteIndex] & (1U<<(7-bitIndex))) != 0;
 323   }
 324 }
 325 
 326 void VM_Version::print_features_internal(const char* text, bool print_anyway) {
 327   tty->print_cr("%s %s",       text, features_string());
 328   tty->print("%s", text);
 329   for (unsigned int i = 0; i < _nfeatures; i++) {
 330     tty->print("  0x%16.16lx", _features[i]);
 331   }
 332   tty->cr();
 333 
 334   if (Verbose || print_anyway) {
 335     // z900
 336     if (has_long_displacement()        ) tty->print_cr("available: %s", "LongDispFacility");
 337     // z990
 338     if (has_long_displacement_fast()   ) tty->print_cr("available: %s", "LongDispFacilityHighPerf");
 339     if (has_ETF2() && has_ETF3()       ) tty->print_cr("available: %s", "ETF2 and ETF3");
 340     if (has_Crypto()                   ) tty->print_cr("available: %s", "CryptoFacility");
 341     // z9
 342     if (has_extended_immediate()       ) tty->print_cr("available: %s", "ExtImmedFacility");
 343     if (has_StoreFacilityListExtended()) tty->print_cr("available: %s", "StoreFacilityListExtended");
 344     if (has_StoreClockFast()           ) tty->print_cr("available: %s", "StoreClockFast");
 345     if (has_ETF2Enhancements()         ) tty->print_cr("available: %s", "ETF2 Enhancements");
 346     if (has_ETF3Enhancements()         ) tty->print_cr("available: %s", "ETF3 Enhancements");
 347     if (has_HFPUnnormalized()          ) tty->print_cr("available: %s", "HFPUnnormalizedFacility");
 348     if (has_HFPMultiplyAndAdd()        ) tty->print_cr("available: %s", "HFPMultiplyAndAddFacility");
 349     // z10
 350     if (has_ParsingEnhancements()      ) tty->print_cr("available: %s", "Parsing Enhancements");
 351     if (has_ExtractCPUtime()           ) tty->print_cr("available: %s", "ExtractCPUTime");
 352     if (has_CompareSwapStore()         ) tty->print_cr("available: %s", "CompareSwapStore");
 353     if (has_GnrlInstrExtensions()      ) tty->print_cr("available: %s", "General Instruction Extensions");
 354     if (has_CompareBranch()            ) tty->print_cr("  available: %s", "Compare and Branch");
 355     if (has_CompareTrap()              ) tty->print_cr("  available: %s", "Compare and Trap");
 356     if (has_RelativeLoadStore()        ) tty->print_cr("  available: %s", "Relative Load/Store");
 357     if (has_MultiplySingleImm32()      ) tty->print_cr("  available: %s", "MultiplySingleImm32");
 358     if (has_Prefetch()                 ) tty->print_cr("  available: %s", "Prefetch");
 359     if (has_MoveImmToMem()             ) tty->print_cr("  available: %s", "Direct Moves Immediate to Memory");
 360     if (has_MemWithImmALUOps()         ) tty->print_cr("  available: %s", "Direct ALU Ops Memory .op. Immediate");
 361     if (has_ExtractCPUAttributes()     ) tty->print_cr("  available: %s", "Extract CPU Atributes");
 362     if (has_ExecuteExtensions()        ) tty->print_cr("available: %s", "ExecuteExtensions");
 363     if (has_FPSupportEnhancements()    ) tty->print_cr("available: %s", "FPSupportEnhancements");
 364     if (has_DecimalFloatingPoint()     ) tty->print_cr("available: %s", "DecimalFloatingPoint");
 365     // z196
 366     if (has_DistinctOpnds()            ) tty->print_cr("available: %s", "Distinct Operands");
 367     if (has_InterlockedAccessV1()      ) tty->print_cr("  available: %s", "InterlockedAccess V1 (fast)");
 368     if (has_PopCount()                 ) tty->print_cr("  available: %s", "PopCount");
 369     if (has_LoadStoreConditional()     ) tty->print_cr("  available: %s", "LoadStoreConditional");
 370     if (has_HighWordInstr()            ) tty->print_cr("  available: %s", "HighWord Instructions");
 371     if (has_FastSync()                 ) tty->print_cr("  available: %s", "FastSync (bcr 14,0)");
 372     if (has_AtomicMemWithImmALUOps()   ) tty->print_cr("available: %s", "Atomic Direct ALU Ops Memory .op. Immediate");
 373     if (has_FPExtensions()             ) tty->print_cr("available: %s", "Floatingpoint Extensions");
 374     if (has_CryptoExt3()               ) tty->print_cr("available: %s", "Crypto Extensions 3");
 375     if (has_CryptoExt4()               ) tty->print_cr("available: %s", "Crypto Extensions 4");
 376     // EC12
 377     if (has_MiscInstrExt()             ) tty->print_cr("available: %s", "Miscelaneous Instruction Extensions");
 378     if (has_ExecutionHint()            ) tty->print_cr("  available: %s", "Execution Hints (branch prediction)");
 379     if (has_ProcessorAssist()          ) tty->print_cr("  available: %s", "Processor Assists");
 380     if (has_LoadAndTrap()              ) tty->print_cr("  available: %s", "Load and Trap");
 381     if (has_TxMem()                    ) tty->print_cr("available: %s", "Transactional Memory");
 382     if (has_InterlockedAccessV2()      ) tty->print_cr("  available: %s", "InterlockedAccess V2 (fast)");
 383     if (has_DFPZonedConversion()       ) tty->print_cr("  available: %s", "DFP Zoned Conversions");
 384     // z13
 385     if (has_LoadStoreConditional2()    ) tty->print_cr("available: %s", "Load/Store Conditional 2");
 386     if (has_CryptoExt5()               ) tty->print_cr("available: %s", "Crypto Extensions 5");
 387     if (has_DFPPackedConversion()      ) tty->print_cr("available: %s", "DFP Packed Conversions");
 388     if (has_VectorFacility()           ) tty->print_cr("available: %s", "Vector Facility");
 389     // test switches
 390     if (has_TestFeature1Impl()         ) tty->print_cr("available: %s", "TestFeature1Impl");
 391     if (has_TestFeature2Impl()         ) tty->print_cr("available: %s", "TestFeature2Impl");
 392     if (has_TestFeature4Impl()         ) tty->print_cr("available: %s", "TestFeature4Impl");
 393     if (has_TestFeature8Impl()         ) tty->print_cr("available: %s", "TestFeature8Impl");
 394 
 395     if (has_Crypto()) {
 396       tty->cr();
 397       tty->print_cr("detailed availability of %s capabilities:", "CryptoFacility");
 398       if (test_feature_bit(&_cipher_features[0], -1, 2*Cipher::_featureBits)) {
 399         tty->cr();
 400         tty->print_cr("  available: %s", "Message Cipher Functions");
 401       }
 402       if (test_feature_bit(&_cipher_features[0], -1, (int)Cipher::_featureBits)) {
 403         tty->print_cr("    available Crypto Features of KM  (Cipher Message):");
 404         for (unsigned int i = 0; i < Cipher::_featureBits; i++) {
 405           if (test_feature_bit(&_cipher_features[0], i, (int)Cipher::_featureBits)) {
 406             switch (i) {
 407               case Cipher::_Query:              tty->print_cr("      available: KM   Query");                  break;
 408               case Cipher::_DEA:                tty->print_cr("      available: KM   DEA");                    break;
 409               case Cipher::_TDEA128:            tty->print_cr("      available: KM   TDEA-128");               break;
 410               case Cipher::_TDEA192:            tty->print_cr("      available: KM   TDEA-192");               break;
 411               case Cipher::_EncryptedDEA:       tty->print_cr("      available: KM   Encrypted DEA");          break;
 412               case Cipher::_EncryptedDEA128:    tty->print_cr("      available: KM   Encrypted DEA-128");      break;
 413               case Cipher::_EncryptedDEA192:    tty->print_cr("      available: KM   Encrypted DEA-192");      break;
 414               case Cipher::_AES128:             tty->print_cr("      available: KM   AES-128");                break;
 415               case Cipher::_AES192:             tty->print_cr("      available: KM   AES-192");                break;
 416               case Cipher::_AES256:             tty->print_cr("      available: KM   AES-256");                break;
 417               case Cipher::_EnccryptedAES128:   tty->print_cr("      available: KM   Encrypted-AES-128");      break;
 418               case Cipher::_EnccryptedAES192:   tty->print_cr("      available: KM   Encrypted-AES-192");      break;
 419               case Cipher::_EnccryptedAES256:   tty->print_cr("      available: KM   Encrypted-AES-256");      break;
 420               case Cipher::_XTSAES128:          tty->print_cr("      available: KM   XTS-AES-128");            break;
 421               case Cipher::_XTSAES256:          tty->print_cr("      available: KM   XTS-AES-256");            break;
 422               case Cipher::_EncryptedXTSAES128: tty->print_cr("      available: KM   XTS-Encrypted-AES-128");  break;
 423               case Cipher::_EncryptedXTSAES256: tty->print_cr("      available: KM   XTS-Encrypted-AES-256");  break;
 424               default: tty->print_cr("      available: unknown KM  code %d", i);      break;
 425             }
 426           }
 427         }
 428       }
 429       if (test_feature_bit(&_cipher_features[2], -1, (int)Cipher::_featureBits)) {
 430         tty->print_cr("    available Crypto Features of KMC (Cipher Message with Chaining):");
 431         for (unsigned int i = 0; i < Cipher::_featureBits; i++) {
 432             if (test_feature_bit(&_cipher_features[2], i, (int)Cipher::_featureBits)) {
 433             switch (i) {
 434               case Cipher::_Query:              tty->print_cr("      available: KMC  Query");                  break;
 435               case Cipher::_DEA:                tty->print_cr("      available: KMC  DEA");                    break;
 436               case Cipher::_TDEA128:            tty->print_cr("      available: KMC  TDEA-128");               break;
 437               case Cipher::_TDEA192:            tty->print_cr("      available: KMC  TDEA-192");               break;
 438               case Cipher::_EncryptedDEA:       tty->print_cr("      available: KMC  Encrypted DEA");          break;
 439               case Cipher::_EncryptedDEA128:    tty->print_cr("      available: KMC  Encrypted DEA-128");      break;
 440               case Cipher::_EncryptedDEA192:    tty->print_cr("      available: KMC  Encrypted DEA-192");      break;
 441               case Cipher::_AES128:             tty->print_cr("      available: KMC  AES-128");                break;
 442               case Cipher::_AES192:             tty->print_cr("      available: KMC  AES-192");                break;
 443               case Cipher::_AES256:             tty->print_cr("      available: KMC  AES-256");                break;
 444               case Cipher::_EnccryptedAES128:   tty->print_cr("      available: KMC  Encrypted-AES-128");      break;
 445               case Cipher::_EnccryptedAES192:   tty->print_cr("      available: KMC  Encrypted-AES-192");      break;
 446               case Cipher::_EnccryptedAES256:   tty->print_cr("      available: KMC  Encrypted-AES-256");      break;
 447               case Cipher::_PRNG:               tty->print_cr("      available: KMC  PRNG");                   break;
 448               default: tty->print_cr("      available: unknown KMC code %d", i);      break;
 449             }
 450           }
 451         }
 452       }
 453 
 454       if (test_feature_bit(&_msgdigest_features[0], -1, 2*MsgDigest::_featureBits)) {
 455         tty->cr();
 456         tty->print_cr("  available: %s", "Message Digest Functions for SHA");
 457       }
 458       if (test_feature_bit(&_msgdigest_features[0], -1, (int)MsgDigest::_featureBits)) {
 459         tty->print_cr("    available Features of KIMD (Msg Digest):");
 460         for (unsigned int i = 0; i < MsgDigest::_featureBits; i++) {
 461             if (test_feature_bit(&_msgdigest_features[0], i, (int)MsgDigest::_featureBits)) {
 462             switch (i) {
 463               case MsgDigest::_Query:  tty->print_cr("      available: KIMD Query");   break;
 464               case MsgDigest::_SHA1:   tty->print_cr("      available: KIMD SHA-1");   break;
 465               case MsgDigest::_SHA256: tty->print_cr("      available: KIMD SHA-256"); break;
 466               case MsgDigest::_SHA512: tty->print_cr("      available: KIMD SHA-512"); break;
 467               case MsgDigest::_GHASH:  tty->print_cr("      available: KIMD GHASH");   break;
 468               default: tty->print_cr("      available: unknown code %d", i);  break;
 469             }
 470           }
 471         }
 472       }
 473       if (test_feature_bit(&_msgdigest_features[2], -1, (int)MsgDigest::_featureBits)) {
 474         tty->print_cr("    available Features of KLMD (Msg Digest):");
 475         for (unsigned int i = 0; i < MsgDigest::_featureBits; i++) {
 476           if (test_feature_bit(&_msgdigest_features[2], i, (int)MsgDigest::_featureBits)) {
 477             switch (i) {
 478               case MsgDigest::_Query:  tty->print_cr("      available: KLMD Query");   break;
 479               case MsgDigest::_SHA1:   tty->print_cr("      available: KLMD SHA-1");   break;
 480               case MsgDigest::_SHA256: tty->print_cr("      available: KLMD SHA-256"); break;
 481               case MsgDigest::_SHA512: tty->print_cr("      available: KLMD SHA-512"); break;
 482               default: tty->print_cr("      available: unknown code %d", i);  break;
 483             }
 484           }
 485         }
 486       }
 487     }
 488     if (ContendedPaddingWidth > 0) {
 489       tty->cr();
 490       tty->print_cr("ContendedPaddingWidth " INTX_FORMAT, ContendedPaddingWidth);
 491     }
 492   }
 493 }
 494 
 495 void VM_Version::print_features() {
 496   print_features_internal("Version:");
 497 }
 498 
 499 void VM_Version::reset_features(bool reset) {
 500   if (reset) {
 501     for (unsigned int i = 0; i < _features_buffer_len; i++) {
 502       VM_Version::_features[i] = 0;
 503     }
 504   }
 505 }
 506 
 507 void VM_Version::set_features_z900(bool reset) {
 508   reset_features(reset);
 509 
 510   set_has_long_displacement();
 511   set_has_ETF2();
 512 }
 513 
 514 void VM_Version::set_features_z990(bool reset) {
 515   reset_features(reset);
 516 
 517   set_features_z900(false);
 518   set_has_ETF3();
 519   set_has_long_displacement_fast();
 520   set_has_HFPMultiplyAndAdd();
 521 }
 522 
 523 void VM_Version::set_features_z9(bool reset) {
 524   reset_features(reset);
 525 
 526   set_features_z990(false);
 527   set_has_StoreFacilityListExtended();
 528   // set_has_Crypto();   // Do not set, crypto features must be retrieved separately.
 529   set_has_ETF2Enhancements();
 530   set_has_ETF3Enhancements();
 531   set_has_extended_immediate();
 532   set_has_StoreClockFast();
 533   set_has_HFPUnnormalized();
 534 }
 535 
 536 void VM_Version::set_features_z10(bool reset) {
 537   reset_features(reset);
 538 
 539   set_features_z9(false);
 540   set_has_CompareSwapStore();
 541   set_has_RelativeLoadStore();
 542   set_has_CompareBranch();
 543   set_has_CompareTrap();
 544   set_has_MultiplySingleImm32();
 545   set_has_Prefetch();
 546   set_has_MoveImmToMem();
 547   set_has_MemWithImmALUOps();
 548   set_has_ExecuteExtensions();
 549   set_has_FPSupportEnhancements();
 550   set_has_DecimalFloatingPoint();
 551   set_has_ExtractCPUtime();
 552   set_has_CryptoExt3();
 553 }
 554 
 555 void VM_Version::set_features_z196(bool reset) {
 556   reset_features(reset);
 557 
 558   set_features_z10(false);
 559   set_has_InterlockedAccessV1();
 560   set_has_PopCount();
 561   set_has_LoadStoreConditional();
 562   set_has_HighWordInstr();
 563   set_has_FastSync();
 564   set_has_FPExtensions();
 565   set_has_DistinctOpnds();
 566   set_has_CryptoExt4();
 567 }
 568 
 569 void VM_Version::set_features_ec12(bool reset) {
 570   reset_features(reset);
 571 
 572   set_features_z196(false);
 573   set_has_MiscInstrExt();
 574   set_has_InterlockedAccessV2();
 575   set_has_LoadAndALUAtomicV2();
 576   set_has_TxMem();
 577 }
 578 
 579 void VM_Version::set_features_z13(bool reset) {
 580   reset_features(reset);
 581 
 582   set_features_ec12(false);
 583   set_has_LoadStoreConditional2();
 584   set_has_CryptoExt5();
 585   set_has_VectorFacility();
 586 }
 587 
 588 void VM_Version::set_features_from(const char* march) {
 589   bool err = false;
 590   bool prt = false;
 591 
 592   if ((march != NULL) && (march[0] != '\0')) {
 593     const int buf_len = 16;
 594     const int hdr_len =  5;
 595     char buf[buf_len];
 596     if (strlen(march) >= hdr_len) {
 597       memcpy(buf, march, hdr_len);
 598       buf[hdr_len] = '\00';
 599     } else {
 600       buf[0]       = '\00';
 601     }
 602 
 603     if (!strcmp(march, "z900")) {
 604       set_features_z900();
 605     } else if (!strcmp(march, "z990")) {
 606         set_features_z990();
 607     } else if (!strcmp(march, "z9")) {
 608         set_features_z9();
 609     } else if (!strcmp(march, "z10")) {
 610         set_features_z10();
 611     } else if (!strcmp(march, "z196")) {
 612         set_features_z196();
 613     } else if (!strcmp(march, "ec12")) {
 614         set_features_ec12();
 615     } else if (!strcmp(march, "z13")) {
 616         set_features_z13();
 617     } else if (!strcmp(buf, "ztest")) {
 618       assert(!has_TestFeaturesImpl(), "possible facility list flag conflict");
 619       if (strlen(march) > hdr_len) {
 620         int itest = 0;
 621         if ((strlen(march)-hdr_len) >= buf_len) err = true;
 622         if (!err) {
 623           memcpy(buf, &march[hdr_len], strlen(march)-hdr_len);
 624           buf[strlen(march)-hdr_len] = '\00';
 625           for (size_t i = 0; !err && (i < strlen(buf)); i++) {
 626             itest = itest*10 + buf[i]-'0';
 627             err   = err || ((buf[i]-'0') < 0) || ((buf[i]-'0') > 9) || (itest > 15);
 628           }
 629         }
 630         if (!err) {
 631           prt = true;
 632           if (itest & 0x01) { set_has_TestFeature1Impl(); }
 633           if (itest & 0x02) { set_has_TestFeature2Impl(); }
 634           if (itest & 0x04) { set_has_TestFeature4Impl(); }
 635           if (itest & 0x08) { set_has_TestFeature8Impl(); }
 636         }
 637       } else {
 638         prt = true;
 639         set_has_TestFeature1Impl();
 640         set_has_TestFeature2Impl();
 641         set_has_TestFeature4Impl();
 642         set_has_TestFeature8Impl();
 643       }
 644     } else {
 645       err = true;
 646     }
 647     if (!err) {
 648       set_features_string();
 649       if (prt || PrintAssembly) {
 650         print_features_internal("CPU Version as set by cmdline option:", prt);
 651       }
 652     } else {
 653       tty->print_cr("***Warning: Unsupported ProcessorArchitecture: %s, internal settings left undisturbed.", march);
 654     }
 655   }
 656 
 657 }
 658 
 659 static long (*getFeatures)(unsigned long*, int, int) = NULL;
 660 
 661 void VM_Version::set_getFeatures(address entryPoint) {
 662   if (getFeatures == NULL) {
 663     getFeatures = (long(*)(unsigned long*, int, int))entryPoint;
 664   }
 665 }
 666 
 667 long VM_Version::call_getFeatures(unsigned long* buffer, int buflen, int functionCode) {
 668   VM_Version::_is_determine_features_test_running = true;
 669   long functionResult = (*getFeatures)(buffer, buflen, functionCode);
 670   VM_Version::_is_determine_features_test_running = false;
 671   return functionResult;
 672 }
 673 
 674 // Helper function for "extract cache attribute" instruction.
 675 int VM_Version::calculate_ECAG_functionCode(unsigned int attributeIndication,
 676                                             unsigned int levelIndication,
 677                                             unsigned int typeIndication) {
 678   return (attributeIndication<<4) | (levelIndication<<1) | typeIndication;
 679 }
 680 
 681 void VM_Version::determine_features() {
 682 
 683   const int      cbuf_size = _code_buffer_len;
 684   const int      buf_len   = _features_buffer_len;
 685 
 686   // Allocate code buffer space for the detection code.
 687   ResourceMark    rm;
 688   CodeBuffer      cbuf("determine CPU features", cbuf_size, 0);
 689   MacroAssembler* a = new MacroAssembler(&cbuf);
 690 
 691   // Emit code.
 692   set_getFeatures(a->pc());
 693   address   code = a->pc();
 694 
 695   // Try STFLE. Possible INVOP will cause defaults to be used.
 696   Label    getFEATURES;
 697   Label    getCPUFEATURES;                   // fcode = -1 (cache)
 698   Label    getCIPHERFEATURES;                // fcode = -2 (cipher)
 699   Label    getMSGDIGESTFEATURES;             // fcode = -3 (SHA)
 700   Label    checkLongDispFast;
 701   Label    noLongDisp;
 702   Label    posDisp, negDisp;
 703   Label    errRTN;
 704   a->z_ltgfr(Z_R0, Z_ARG2);                  // Buf len to r0 and test.
 705   a->z_brl(getFEATURES);                     // negative -> Get machine features.
 706   a->z_brz(checkLongDispFast);               // zero -> Check for high-speed Long Displacement Facility.
 707   a->z_aghi(Z_R0, -1);
 708   a->z_stfle(0, Z_ARG1);
 709   a->z_lg(Z_R1, 0, Z_ARG1);                  // Get first DW of facility list.
 710   a->z_lgr(Z_RET, Z_R0);                     // Calculate rtn value for success.
 711   a->z_la(Z_RET, 1, Z_RET);
 712   a->z_brnz(errRTN);                         // Instr failed if non-zero CC.
 713   a->z_ltgr(Z_R1, Z_R1);                     // Instr failed if first DW == 0.
 714   a->z_bcr(Assembler::bcondNotZero, Z_R14);  // Successful return.
 715 
 716   a->bind(errRTN);
 717   a->z_lngr(Z_RET, Z_RET);
 718   a->z_ltgr(Z_R1, Z_R1);
 719   a->z_bcr(Assembler::bcondNotZero, Z_R14);  // Return "buffer too small".
 720   a->z_xgr(Z_RET, Z_RET);
 721   a->z_br(Z_R14);                            // Return "operation aborted".
 722 
 723   a->bind(getFEATURES);
 724   a->z_cghi(Z_R0, -1);                       // -1: Extract CPU attributes, currently: cache layout only.
 725   a->z_bre(getCPUFEATURES);
 726   a->z_cghi(Z_R0, -2);                       // -2: Extract detailed crypto capabilities (cipher instructions).
 727   a->z_bre(getCIPHERFEATURES);
 728   a->z_cghi(Z_R0, -3);                       // -3: Extract detailed crypto capabilities (msg digest instructions).
 729   a->z_bre(getMSGDIGESTFEATURES);
 730 
 731   a->z_xgr(Z_RET, Z_RET);                    // Not a valid function code.
 732   a->z_br(Z_R14);                            // Return "operation aborted".
 733 
 734   // Try KIMD/KLMD query function to get details about msg digest (secure hash, SHA) instructions.
 735   a->bind(getMSGDIGESTFEATURES);
 736   a->z_lghi(Z_R0,(int)MsgDigest::_Query);    // query function code
 737   a->z_lgr(Z_R1,Z_R2);                       // param block addr, 2*16 bytes min size
 738   a->z_kimd(Z_R2,Z_R2);                      // Get available KIMD functions (bit pattern in param blk).
 739   a->z_la(Z_R1,16,Z_R1);                     // next param block addr
 740   a->z_klmd(Z_R2,Z_R2);                      // Get available KLMD functions (bit pattern in param blk).
 741   a->z_lghi(Z_RET,4);
 742   a->z_br(Z_R14);
 743 
 744   // Try KM/KMC query function to get details about crypto instructions.
 745   a->bind(getCIPHERFEATURES);
 746   a->z_lghi(Z_R0,(int)Cipher::_Query);       // query function code
 747   a->z_lgr(Z_R1,Z_R2);                       // param block addr, 2*16 bytes min size (KIMD/KLMD output)
 748   a->z_km(Z_R2,Z_R2);                        // get available KM functions
 749   a->z_la(Z_R1,16,Z_R1);                     // next param block addr
 750   a->z_kmc(Z_R2,Z_R2);                       // get available KMC functions
 751   a->z_lghi(Z_RET,4);
 752   a->z_br(Z_R14);
 753 
 754   // Use EXTRACT CPU ATTRIBUTE instruction to get information about cache layout.
 755   a->bind(getCPUFEATURES);
 756   a->z_xgr(Z_R0,Z_R0);                       // as recommended in instruction documentation
 757   a->z_ecag(Z_RET,Z_R0,0,Z_ARG3);            // Extract information as requested by Z_ARG1 contents.
 758   a->z_br(Z_R14);
 759 
 760   // Check the performance of the Long Displacement Facility, i.e. find out if we are running on z900 or newer.
 761   a->bind(checkLongDispFast);
 762   a->z_llill(Z_R0, 0xffff);                  // preset #iterations
 763   a->z_larl(Z_R1, posDisp);
 764   a->z_stck(0, Z_ARG1);                      // Get begin timestamp.
 765 
 766   a->bind(posDisp);                          // Positive disp loop.
 767   a->z_lg(Z_ARG2, 0, Z_ARG1);
 768   a->z_bctgr(Z_R0, Z_R1);
 769 
 770   a->z_stck(0, Z_ARG1);                      // Get end timestamp.
 771   a->z_sg(Z_ARG2, 0, Z_R0, Z_ARG1);          // Calculate elapsed time.
 772   a->z_lcgr(Z_ARG2, Z_ARG2);
 773   a->z_srlg(Z_ARG2, Z_ARG2, 12);             // LSB: now microseconds
 774   a->z_stg(Z_ARG2, 8, Z_ARG1);               // Store difference in buffer[1].
 775 
 776   a->z_llill(Z_R0, 0xffff);                  // preset #iterations
 777   a->z_larl(Z_R1, negDisp);
 778   a->z_xgr(Z_ARG2, Z_ARG2);                  // Clear to detect absence of LongDisp facility.
 779   a->z_stck(0, Z_ARG1);                      // Get begin timestamp.
 780   a->z_la(Z_ARG1, 8, Z_ARG1);
 781 
 782   a->bind(negDisp);                          // Negative disp loop.
 783   a->z_lg(Z_ARG2, -8, Z_ARG1);
 784   a->z_bctgr(Z_R0, Z_R1);
 785 
 786   a->z_aghi(Z_ARG1, -8);
 787   a->z_stck(0, Z_ARG1);                      // Get end timestamp.
 788   a->z_ltgr(Z_ARG2, Z_ARG2);                 // Check for absence of LongDisp facility.
 789   a->z_brz(noLongDisp);
 790   a->z_sg(Z_ARG2, 0, Z_R0, Z_ARG1);          // Calc elapsed time.
 791   a->z_lcgr(Z_ARG2, Z_ARG2);
 792   a->z_srlg(Z_ARG2, Z_ARG2, 12);             // LSB: now microseconds
 793   a->z_stg(Z_ARG2, 0, Z_ARG1);               // store difference in buffer[0]
 794 
 795   a->z_llill(Z_RET,0xffff);
 796   a->z_br(Z_R14);
 797 
 798   a->bind(noLongDisp);
 799   a->z_lghi(Z_RET,-1);
 800   a->z_br(Z_R14);
 801 
 802   address code_end = a->pc();
 803   a->flush();
 804 
 805   // Print the detection code.
 806   bool printVerbose = Verbose || PrintAssembly || PrintStubCode;
 807   if (printVerbose) {
 808     ttyLocker ttyl;
 809     tty->print_cr("Decoding CPU feature detection stub at " INTPTR_FORMAT " before execution:", p2i(code));
 810     tty->print_cr("Stub length is %ld bytes, codebuffer reserves %d bytes, %ld bytes spare.",
 811                   code_end-code, cbuf_size, cbuf_size-(code_end-code));
 812 
 813     // Use existing decode function. This enables the [Code] format which is needed to DecodeErrorFile.
 814     Disassembler::decode((u_char*)code, (u_char*)code_end, tty);
 815   }
 816 
 817   // Prepare for detection code execution and clear work buffer.
 818   _nfeatures        = 0;
 819   _ncipher_features = 0;
 820   unsigned long  buffer[buf_len];
 821 
 822   for (int i = 0; i < buf_len; i++) {
 823     buffer[i] = 0L;
 824   }
 825 
 826   // execute code
 827   // Illegal instructions will be replaced by 0 in signal handler.
 828   // In case of problems, call_getFeatures will return a not-positive result.
 829   long used_len = call_getFeatures(buffer, buf_len, 0);
 830 
 831   bool ok;
 832   if (used_len == 1) {
 833     ok = true;
 834   } else if (used_len > 1) {
 835     unsigned int used_lenU = (unsigned int)used_len;
 836     ok = true;
 837     for (unsigned int i = 1; i < used_lenU; i++) {
 838       ok = ok && (buffer[i] == 0L);
 839     }
 840     if (printVerbose && !ok) {
 841       bool compact = false;
 842       tty->print_cr("Note: feature list has %d (i.e. more than one) array elements.", used_lenU);
 843       if (compact) {
 844         tty->print("non-zero feature list elements:");
 845         for (unsigned int i = 0; i < used_lenU; i++) {
 846           tty->print("  [%d]: 0x%16.16lx", i, buffer[i]);
 847         }
 848         tty->cr();
 849       } else {
 850         for (unsigned int i = 0; i < used_lenU; i++) {
 851           tty->print_cr("non-zero feature list[%d]: 0x%16.16lx", i, buffer[i]);
 852         }
 853       }
 854 
 855       if (compact) {
 856         tty->print_cr("Active features (compact view):");
 857         for (unsigned int k = 0; k < used_lenU; k++) {
 858           tty->print_cr("  buffer[%d]:", k);
 859           for (unsigned int j = k*sizeof(long); j < (k+1)*sizeof(long); j++) {
 860             bool line = false;
 861             for (unsigned int i = j*8; i < (j+1)*8; i++) {
 862               bool bit  = test_feature_bit(buffer, i, used_lenU*sizeof(long)*8);
 863               if (bit) {
 864                 if (!line) {
 865                   tty->print("    byte[%d]:", j);
 866                   line = true;
 867                 }
 868                 tty->print("  [%3.3d]", i);
 869               }
 870             }
 871             if (line) {
 872               tty->cr();
 873             }
 874           }
 875         }
 876       } else {
 877         tty->print_cr("Active features (full view):");
 878         for (unsigned int k = 0; k < used_lenU; k++) {
 879           tty->print_cr("  buffer[%d]:", k);
 880           for (unsigned int j = k*sizeof(long); j < (k+1)*sizeof(long); j++) {
 881             tty->print("    byte[%d]:", j);
 882             for (unsigned int i = j*8; i < (j+1)*8; i++) {
 883               bool bit  = test_feature_bit(buffer, i, used_lenU*sizeof(long)*8);
 884               if (bit) {
 885                 tty->print("  [%3.3d]", i);
 886               } else {
 887                 tty->print("       ");
 888               }
 889             }
 890             tty->cr();
 891           }
 892         }
 893       }
 894     }
 895     ok = true;
 896   } else {  // No features retrieved if we reach here. Buffer too short or instr not available.
 897     if (used_len < 0) {
 898       ok = false;
 899       if (printVerbose) {
 900         tty->print_cr("feature list buffer[%d] too short, required: buffer[%ld]", buf_len, -used_len);
 901       }
 902     } else {
 903       if (printVerbose) {
 904         tty->print_cr("feature list could not be retrieved. Running on z900 or z990? Trying to find out...");
 905       }
 906       used_len = call_getFeatures(buffer, 0, 0);       // Must provide at least two DW buffer elements!!!!
 907 
 908       ok = used_len > 0;
 909       if (ok) {
 910         if (buffer[1]*10 < buffer[0]) {
 911           set_features_z900();
 912         } else {
 913           set_features_z990();
 914         }
 915 
 916         if (printVerbose) {
 917           tty->print_cr("Note: high-speed long displacement test used %ld iterations.", used_len);
 918           tty->print_cr("      Positive displacement loads took %8.8lu microseconds.", buffer[1]);
 919           tty->print_cr("      Negative displacement loads took %8.8lu microseconds.", buffer[0]);
 920           if (has_long_displacement_fast()) {
 921             tty->print_cr("      assuming high-speed long displacement IS     available.");
 922           } else {
 923             tty->print_cr("      assuming high-speed long displacement is NOT available.");
 924           }
 925         }
 926       } else {
 927         if (printVerbose) {
 928           tty->print_cr("Note: high-speed long displacement test was not successful.");
 929           tty->print_cr("      assuming long displacement is NOT available.");
 930         }
 931       }
 932       return; // Do not copy buffer to _features, no test for cipher features.
 933     }
 934   }
 935 
 936   if (ok) {
 937     // Fill features buffer.
 938     // Clear work buffer.
 939     for (int i = 0; i < buf_len; i++) {
 940       _features[i]           = buffer[i];
 941       _cipher_features[i]    = 0;
 942       _msgdigest_features[i] = 0;
 943       buffer[i]              = 0L;
 944     }
 945     _nfeatures = used_len;
 946   } else {
 947     for (int i = 0; i < buf_len; i++) {
 948       _features[i]           = 0;
 949       _cipher_features[i]    = 0;
 950       _msgdigest_features[i] = 0;
 951       buffer[i]              = 0L;
 952     }
 953     _nfeatures = 0;
 954   }
 955 
 956   // Extract Crypto Facility details.
 957   if (has_Crypto()) {
 958     // Get cipher features.
 959     used_len = call_getFeatures(buffer, -2, 0);
 960     for (int i = 0; i < buf_len; i++) {
 961       _cipher_features[i] = buffer[i];
 962     }
 963     _ncipher_features = used_len;
 964 
 965     // Get msg digest features.
 966     used_len = call_getFeatures(buffer, -3, 0);
 967     for (int i = 0; i < buf_len; i++) {
 968       _msgdigest_features[i] = buffer[i];
 969     }
 970     _nmsgdigest_features = used_len;
 971   }
 972 
 973   static int   levelProperties[_max_cache_levels];     // All property indications per level.
 974   static int   levelScope[_max_cache_levels];          // private/shared
 975   static const char* levelScopeText[4] = {"No cache   ",
 976                                           "CPU private",
 977                                           "shared     ",
 978                                           "reserved   "};
 979 
 980   static int   levelType[_max_cache_levels];           // D/I/mixed
 981   static const char* levelTypeText[4]  = {"separate D and I caches",
 982                                           "I cache only           ",
 983                                           "D-cache only           ",
 984                                           "combined D/I cache     "};
 985 
 986   static unsigned int levelReserved[_max_cache_levels];    // reserved property bits
 987   static unsigned int levelLineSize[_max_cache_levels];
 988   static unsigned int levelTotalSize[_max_cache_levels];
 989   static unsigned int levelAssociativity[_max_cache_levels];
 990 
 991 
 992   // Extract Cache Layout details.
 993   if (has_ExtractCPUAttributes() && printVerbose) { // For information only, as of now.
 994     bool         lineSize_mismatch;
 995     bool         print_something;
 996     long         functionResult;
 997     unsigned int attributeIndication = 0; // 0..15
 998     unsigned int levelIndication     = 0; // 0..8
 999     unsigned int typeIndication      = 0; // 0..1 (D-Cache, I-Cache)
1000     int          functionCode        = calculate_ECAG_functionCode(attributeIndication, levelIndication, typeIndication);
1001 
1002     // Get cache topology.
1003     functionResult = call_getFeatures(buffer, -1, functionCode);
1004 
1005     for (unsigned int i = 0; i < _max_cache_levels; i++) {
1006       if (functionResult > 0) {
1007         int shiftVal          = 8*(_max_cache_levels-(i+1));
1008         levelProperties[i]    = (functionResult & (0xffUL<<shiftVal)) >> shiftVal;
1009         levelReserved[i]      = (levelProperties[i] & 0xf0) >> 4;
1010         levelScope[i]         = (levelProperties[i] & 0x0c) >> 2;
1011         levelType[i]          = (levelProperties[i] & 0x03);
1012       } else {
1013         levelProperties[i]    = 0;
1014         levelReserved[i]      = 0;
1015         levelScope[i]         = 0;
1016         levelType[i]          = 0;
1017       }
1018       levelLineSize[i]      = 0;
1019       levelTotalSize[i]     = 0;
1020       levelAssociativity[i] = 0;
1021     }
1022 
1023     tty->cr();
1024     tty->print_cr("------------------------------------");
1025     tty->print_cr("---  Cache Topology Information  ---");
1026     tty->print_cr("------------------------------------");
1027     for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1028       tty->print_cr("  Cache Level %d: <scope>  %s | <type>  %s",
1029                     i+1, levelScopeText[levelScope[i]], levelTypeText[levelType[i]]);
1030     }
1031 
1032     // Get D-cache details per level.
1033     _Dcache_lineSize   = 0;
1034     lineSize_mismatch  = false;
1035     print_something    = false;
1036     typeIndication     = 0; // 0..1 (D-Cache, I-Cache)
1037     for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1038       if ((levelType[i] == 0) || (levelType[i] == 2)) {
1039         print_something     = true;
1040 
1041         // Get cache line size of level i.
1042         attributeIndication   = 1;
1043         functionCode          = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1044         levelLineSize[i]      = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1045 
1046         // Get cache total size of level i.
1047         attributeIndication   = 2;
1048         functionCode          = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1049         levelTotalSize[i]     = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1050 
1051         // Get cache associativity of level i.
1052         attributeIndication   = 3;
1053         functionCode          = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1054         levelAssociativity[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1055 
1056         _Dcache_lineSize      = _Dcache_lineSize == 0 ? levelLineSize[i] : _Dcache_lineSize;
1057         lineSize_mismatch     = lineSize_mismatch || (_Dcache_lineSize != levelLineSize[i]);
1058       } else {
1059         levelLineSize[i]      = 0;
1060       }
1061     }
1062 
1063     if (print_something) {
1064       tty->cr();
1065       tty->print_cr("------------------------------------");
1066       tty->print_cr("---  D-Cache Detail Information  ---");
1067       tty->print_cr("------------------------------------");
1068       if (lineSize_mismatch) {
1069         tty->print_cr("WARNING: D-Cache line size mismatch!");
1070       }
1071       for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1072         if (levelLineSize[i] > 0) {
1073           tty->print_cr("  D-Cache Level %d: line size = %4d,  total size = %6dKB,  associativity = %2d",
1074                         i+1, levelLineSize[i], levelTotalSize[i]/(int)K, levelAssociativity[i]);
1075         }
1076       }
1077     }
1078 
1079     // Get I-cache details per level.
1080     _Icache_lineSize   = 0;
1081     lineSize_mismatch  = false;
1082     print_something    = false;
1083     typeIndication     = 1; // 0..1 (D-Cache, I-Cache)
1084     for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1085       if ((levelType[i] == 0) || (levelType[i] == 1)) {
1086         print_something     = true;
1087 
1088         // Get cache line size of level i.
1089         attributeIndication   = 1;
1090         functionCode          = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1091         levelLineSize[i]      = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1092 
1093         // Get cache total size of level i.
1094         attributeIndication   = 2;
1095         functionCode          = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1096         levelTotalSize[i]     = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1097 
1098         // Get cache associativity of level i.
1099         attributeIndication   = 3;
1100         functionCode          = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1101         levelAssociativity[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1102 
1103         _Icache_lineSize      = _Icache_lineSize == 0 ? levelLineSize[i] : _Icache_lineSize;
1104         lineSize_mismatch     = lineSize_mismatch || (_Icache_lineSize != levelLineSize[i]);
1105       } else {
1106         levelLineSize[i]      = 0;
1107       }
1108     }
1109 
1110     if (print_something) {
1111       tty->cr();
1112       tty->print_cr("------------------------------------");
1113       tty->print_cr("---  I-Cache Detail Information  ---");
1114       tty->print_cr("------------------------------------");
1115       if (lineSize_mismatch) {
1116         tty->print_cr("WARNING: I-Cache line size mismatch!");
1117       }
1118       for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1119         if (levelLineSize[i] > 0) {
1120           tty->print_cr("  I-Cache Level %d: line size = %4d,  total size = %6dKB,  associativity = %2d",
1121                         i+1, levelLineSize[i], levelTotalSize[i]/(int)K, levelAssociativity[i]);
1122         }
1123       }
1124     }
1125 
1126     // Get D/I-cache details per level.
1127     lineSize_mismatch  = false;
1128     print_something    = false;
1129     typeIndication     = 0; // 0..1 (D-Cache, I-Cache)
1130     for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1131       if (levelType[i] == 3) {
1132         print_something     = true;
1133 
1134         // Get cache line size of level i.
1135         attributeIndication   = 1;
1136         functionCode          = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1137         levelLineSize[i]      = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1138 
1139         // Get cache total size of level i.
1140         attributeIndication   = 2;
1141         functionCode          = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1142         levelTotalSize[i]     = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1143 
1144         // Get cache associativity of level i.
1145         attributeIndication   = 3;
1146         functionCode          = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1147         levelAssociativity[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1148 
1149         _Dcache_lineSize      = _Dcache_lineSize == 0 ? levelLineSize[i] : _Dcache_lineSize;
1150         _Icache_lineSize      = _Icache_lineSize == 0 ? levelLineSize[i] : _Icache_lineSize;
1151         lineSize_mismatch     = lineSize_mismatch || (_Dcache_lineSize != levelLineSize[i])
1152                                                   || (_Icache_lineSize != levelLineSize[i]);
1153       } else {
1154         levelLineSize[i]      = 0;
1155       }
1156     }
1157 
1158     if (print_something) {
1159       tty->cr();
1160       tty->print_cr("--------------------------------------");
1161       tty->print_cr("---  D/I-Cache Detail Information  ---");
1162       tty->print_cr("--------------------------------------");
1163       if (lineSize_mismatch) {
1164         tty->print_cr("WARNING: D/I-Cache line size mismatch!");
1165       }
1166       for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1167         if (levelLineSize[i] > 0) {
1168           tty->print_cr("  D/I-Cache Level %d: line size = %4d,  total size = %6dKB,  associativity = %2d",
1169                         i+1, levelLineSize[i], levelTotalSize[i]/(int)K, levelAssociativity[i]);
1170         }
1171       }
1172     }
1173     tty->cr();
1174   }
1175   return;
1176 }
1177 
1178 unsigned long VM_Version::z_SIGILL() {
1179   unsigned long   ZeroBuffer = 0;
1180   unsigned long   work;
1181   asm(
1182     "     LA      %[work],%[buffer]  \n\t"   // Load address of buffer.
1183     "     LARL    14,+6              \n\t"   // Load address of faulting instruction.
1184     "     BCR     15,%[work]         \n\t"   // Branch into buffer, execute whatever is in there.
1185     : [buffer]  "+Q"  (ZeroBuffer)   /* outputs   */
1186     , [work]   "=&a"  (work)         /* outputs   */
1187     :                                /* inputs    */
1188     : "cc"                           /* clobbered */
1189  );
1190   return ZeroBuffer;
1191 }
1192 
1193 unsigned long VM_Version::z_SIGSEGV() {
1194   unsigned long   ZeroBuffer = 0;
1195   unsigned long   work;
1196   asm(
1197     "     LG      %[work],%[buffer]  \n\t"   // Load zero address.
1198     "     STG     %[work],0(,%[work])\n\t"   // Store to address zero.
1199     : [buffer]  "+Q"  (ZeroBuffer)   /* outputs   */
1200     , [work]   "=&a"  (work)         /* outputs   */
1201     :                                /* inputs    */
1202     : "cc"                           /* clobbered */
1203  );
1204   return ZeroBuffer;
1205 }
1206