1 /*
2 * Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2016, 2020 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 "jvm.h"
28 #include "asm/assembler.inline.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "code/compiledIC.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "runtime/java.hpp"
33 #include "runtime/stubCodeGenerator.hpp"
34 #include "runtime/vm_version.hpp"
35
36 # include <sys/sysinfo.h>
37
38 bool VM_Version::_is_determine_features_test_running = false;
39 const char* VM_Version::_model_string;
40
41 unsigned long VM_Version::_features[_features_buffer_len] = {0, 0, 0, 0};
42 unsigned long VM_Version::_cipher_features[_features_buffer_len] = {0, 0, 0, 0};
43 unsigned long VM_Version::_msgdigest_features[_features_buffer_len] = {0, 0, 0, 0};
44 unsigned int VM_Version::_nfeatures = 0;
45 unsigned int VM_Version::_ncipher_features = 0;
46 unsigned int VM_Version::_nmsgdigest_features = 0;
47 unsigned int VM_Version::_Dcache_lineSize = DEFAULT_CACHE_LINE_SIZE;
48 unsigned int VM_Version::_Icache_lineSize = DEFAULT_CACHE_LINE_SIZE;
49
50 static const char* z_gen[] = {" ", "G1", "G2", "G3", "G4", "G5", "G6", "G7" };
51 static const char* z_machine[] = {" ", "2064", "2084", "2094", "2097", "2817", " ", "2964" };
52 static const char* z_name[] = {" ", "z900", "z990", "z9 EC", "z10 EC", "z196 EC", "ec12", "z13" };
53
54 void VM_Version::initialize() {
55 determine_features(); // Get processor capabilities.
56 set_features_string(); // Set a descriptive feature indication.
57
58 if (Verbose) {
59 print_features();
60 }
61
62 intx cache_line_size = Dcache_lineSize(0);
63
64 #ifdef COMPILER2
65 MaxVectorSize = 8;
66 #endif
67
68 if (has_PrefetchRaw()) {
69 if (FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { // not preset
70 // 0 = no prefetch.
71 // 1 = Prefetch instructions for each allocation.
72 // 2 = Use TLAB watermark to gate allocation prefetch.
73 AllocatePrefetchStyle = 1;
74 }
75
76 if (AllocatePrefetchStyle > 0) { // Prefetching turned on at all?
77 // Distance to prefetch ahead of allocation pointer.
78 if (FLAG_IS_DEFAULT(AllocatePrefetchDistance) || (AllocatePrefetchDistance < 0)) { // not preset
79 AllocatePrefetchDistance = 0;
80 }
81
82 // Number of lines to prefetch ahead of allocation pointer.
83 if (FLAG_IS_DEFAULT(AllocatePrefetchLines) || (AllocatePrefetchLines <= 0)) { // not preset
84 AllocatePrefetchLines = 3;
85 }
86
87 // Step size in bytes of sequential prefetch instructions.
88 if (FLAG_IS_DEFAULT(AllocatePrefetchStepSize) || (AllocatePrefetchStepSize <= 0)) { // not preset
89 FLAG_SET_DEFAULT(AllocatePrefetchStepSize, cache_line_size);
90 } else if (AllocatePrefetchStepSize < cache_line_size) {
91 FLAG_SET_DEFAULT(AllocatePrefetchStepSize, cache_line_size);
92 } else {
93 FLAG_SET_DEFAULT(AllocatePrefetchStepSize, cache_line_size);
94 }
95 } else {
96 FLAG_SET_DEFAULT(AllocatePrefetchStyle, 0);
97 AllocatePrefetchDistance = 0;
98 AllocatePrefetchLines = 0;
99 // Can't be zero. Will SIGFPE during constraints checking.
100 FLAG_SET_DEFAULT(AllocatePrefetchStepSize, cache_line_size);
101 }
102
103 } else {
104 FLAG_SET_DEFAULT(AllocatePrefetchStyle, 0);
105 AllocatePrefetchDistance = 0;
106 AllocatePrefetchLines = 0;
107 // Can't be zero. Will SIGFPE during constraints checking.
108 FLAG_SET_DEFAULT(AllocatePrefetchStepSize, cache_line_size);
109 }
110
111 // TODO:
112 // On z/Architecture, cache line size is significantly large (256 bytes). Do we really need
113 // to keep contended members that far apart? Performance tests are required.
114 if (FLAG_IS_DEFAULT(ContendedPaddingWidth) && (cache_line_size > ContendedPaddingWidth)) {
115 ContendedPaddingWidth = cache_line_size;
116 }
117
118 // On z/Architecture, the CRC32/CRC32C intrinsics are implemented "by hand".
119 // TODO: Provide implementation based on the vector instructions available from z13.
120 // Note: The CHECKSUM instruction, which has been there since the very beginning
121 // (of z/Architecture), computes "some kind of" a checksum.
122 // It has nothing to do with the CRC32 algorithm.
123 if (FLAG_IS_DEFAULT(UseCRC32Intrinsics)) {
124 FLAG_SET_DEFAULT(UseCRC32Intrinsics, true);
125 }
126 if (FLAG_IS_DEFAULT(UseCRC32CIntrinsics)) {
127 FLAG_SET_DEFAULT(UseCRC32CIntrinsics, true);
128 }
129
130 // TODO: Provide implementation.
131 if (UseAdler32Intrinsics) {
132 warning("Adler32Intrinsics not available on this CPU.");
133 FLAG_SET_DEFAULT(UseAdler32Intrinsics, false);
134 }
135
136 // On z/Architecture, we take UseAES as the general switch to enable/disable the AES intrinsics.
137 // The specific, and yet to be defined, switches UseAESxxxIntrinsics will then be set
138 // depending on the actual machine capabilities.
139 // Explicitly setting them via CmdLine option takes precedence, of course.
140 // TODO: UseAESIntrinsics must be made keylength specific.
141 // As of March 2015 and Java8, only AES128 is supported by the Java Cryptographic Extensions.
142 // Therefore, UseAESIntrinsics is of minimal use at the moment.
143 if (FLAG_IS_DEFAULT(UseAES) && has_Crypto_AES()) {
144 FLAG_SET_DEFAULT(UseAES, true);
145 }
146 if (UseAES && !has_Crypto_AES()) {
147 warning("AES instructions are not available on this CPU");
148 FLAG_SET_DEFAULT(UseAES, false);
149 }
150 if (UseAES) {
151 if (FLAG_IS_DEFAULT(UseAESIntrinsics)) {
152 FLAG_SET_DEFAULT(UseAESIntrinsics, true);
153 }
154 }
155 if (UseAESIntrinsics && !has_Crypto_AES()) {
156 warning("AES intrinsics are not available on this CPU");
157 FLAG_SET_DEFAULT(UseAESIntrinsics, false);
158 }
159 if (UseAESIntrinsics && !UseAES) {
160 warning("AES intrinsics require UseAES flag to be enabled. Intrinsics will be disabled.");
161 FLAG_SET_DEFAULT(UseAESIntrinsics, false);
162 }
163
164 // TODO: implement AES/CTR intrinsics
165 if (UseAESCTRIntrinsics) {
166 warning("AES/CTR intrinsics are not available on this CPU");
167 FLAG_SET_DEFAULT(UseAESCTRIntrinsics, false);
168 }
169
170 if (FLAG_IS_DEFAULT(UseGHASHIntrinsics) && has_Crypto_GHASH()) {
171 FLAG_SET_DEFAULT(UseGHASHIntrinsics, true);
172 }
173 if (UseGHASHIntrinsics && !has_Crypto_GHASH()) {
174 warning("GHASH intrinsics are not available on this CPU");
175 FLAG_SET_DEFAULT(UseGHASHIntrinsics, false);
176 }
177
178 if (FLAG_IS_DEFAULT(UseFMA)) {
179 FLAG_SET_DEFAULT(UseFMA, true);
180 }
181
182 if (UseMD5Intrinsics) {
183 warning("MD5 intrinsics are not available on this CPU");
184 FLAG_SET_DEFAULT(UseMD5Intrinsics, false);
185 }
186
187 // On z/Architecture, we take UseSHA as the general switch to enable/disable the SHA intrinsics.
188 // The specific switches UseSHAxxxIntrinsics will then be set depending on the actual
189 // machine capabilities.
190 // Explicitly setting them via CmdLine option takes precedence, of course.
191 if (FLAG_IS_DEFAULT(UseSHA) && has_Crypto_SHA()) {
192 FLAG_SET_DEFAULT(UseSHA, true);
193 }
194 if (UseSHA && !has_Crypto_SHA()) {
195 warning("SHA instructions are not available on this CPU");
196 FLAG_SET_DEFAULT(UseSHA, false);
197 }
198 if (UseSHA && has_Crypto_SHA1()) {
199 if (FLAG_IS_DEFAULT(UseSHA1Intrinsics)) {
200 FLAG_SET_DEFAULT(UseSHA1Intrinsics, true);
201 }
202 } else if (UseSHA1Intrinsics) {
203 warning("Intrinsics for SHA-1 crypto hash functions not available on this CPU.");
204 FLAG_SET_DEFAULT(UseSHA1Intrinsics, false);
205 }
206 if (UseSHA && has_Crypto_SHA256()) {
207 if (FLAG_IS_DEFAULT(UseSHA256Intrinsics)) {
208 FLAG_SET_DEFAULT(UseSHA256Intrinsics, true);
209 }
210 } else if (UseSHA256Intrinsics) {
211 warning("Intrinsics for SHA-224 and SHA-256 crypto hash functions not available on this CPU.");
212 FLAG_SET_DEFAULT(UseSHA256Intrinsics, false);
213 }
214 if (UseSHA && has_Crypto_SHA512()) {
215 if (FLAG_IS_DEFAULT(UseSHA512Intrinsics)) {
216 FLAG_SET_DEFAULT(UseSHA512Intrinsics, true);
217 }
218 } else if (UseSHA512Intrinsics) {
219 warning("Intrinsics for SHA-384 and SHA-512 crypto hash functions not available on this CPU.");
220 FLAG_SET_DEFAULT(UseSHA512Intrinsics, false);
221 }
222
223 if (!(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics)) {
224 FLAG_SET_DEFAULT(UseSHA, false);
225 }
226
227 #ifdef COMPILER2
228 if (FLAG_IS_DEFAULT(UseMultiplyToLenIntrinsic)) {
229 FLAG_SET_DEFAULT(UseMultiplyToLenIntrinsic, true);
230 }
231 if (FLAG_IS_DEFAULT(UseMontgomeryMultiplyIntrinsic)) {
232 FLAG_SET_DEFAULT(UseMontgomeryMultiplyIntrinsic, true);
233 }
234 if (FLAG_IS_DEFAULT(UseMontgomerySquareIntrinsic)) {
235 FLAG_SET_DEFAULT(UseMontgomerySquareIntrinsic, true);
236 }
237 #endif
238 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) {
239 FLAG_SET_DEFAULT(UsePopCountInstruction, true);
240 }
241
242 // z/Architecture supports 8-byte compare-exchange operations
243 // (see Atomic::cmpxchg)
244 // and 'atomic long memory ops' (see Unsafe_GetLongVolatile).
245 _supports_cx8 = true;
246
247 _supports_atomic_getadd4 = VM_Version::has_LoadAndALUAtomicV1();
248 _supports_atomic_getadd8 = VM_Version::has_LoadAndALUAtomicV1();
249
250 // z/Architecture supports unaligned memory accesses.
251 // Performance penalty is negligible. An additional tick or so
252 // is lost if the accessed data spans a cache line boundary.
253 // Unaligned accesses are not atomic, of course.
254 if (FLAG_IS_DEFAULT(UseUnalignedAccesses)) {
255 FLAG_SET_DEFAULT(UseUnalignedAccesses, true);
256 }
257 }
258
259
260 void VM_Version::set_features_string() {
261 // A note on the _features_string format:
262 // There are jtreg tests checking the _features_string for various properties.
263 // For some strange reason, these tests require the string to contain
264 // only _lowercase_ characters. Keep that in mind when being surprised
265 // about the unusual notation of features - and when adding new ones.
266 // Features may have one comma at the end.
267 // Furthermore, use one, and only one, separator space between features.
268 // Multiple spaces are considered separate tokens, messing up everything.
269 unsigned int ambiguity = 0;
270 _model_string = z_name[0];
271 if (is_z13()) {
272 _features_string = "system-z, g7-z13, ldisp_fast, extimm, pcrel_load/store, cmpb, cond_load/store, interlocked_update, txm, vectorinstr";
273 _model_string = z_name[7];
274 ambiguity++;
275 }
276 if (is_ec12()) {
277 _features_string = "system-z, g6-ec12, ldisp_fast, extimm, pcrel_load/store, cmpb, cond_load/store, interlocked_update, txm";
278 _model_string = z_name[6];
279 ambiguity++;
280 }
281 if (is_z196()) {
282 _features_string = "system-z, g5-z196, ldisp_fast, extimm, pcrel_load/store, cmpb, cond_load/store, interlocked_update";
283 _model_string = z_name[5];
284 ambiguity++;
285 }
286 if (is_z10()) {
287 _features_string = "system-z, g4-z10, ldisp_fast, extimm, pcrel_load/store, cmpb";
288 _model_string = z_name[4];
289 ambiguity++;
290 }
291 if (is_z9()) {
292 _features_string = "system-z, g3-z9, ldisp_fast, extimm, out-of-support as of 2016-04-01";
293 _model_string = z_name[3];
294 ambiguity++;
295 }
296 if (is_z990()) {
297 _features_string = "system-z, g2-z990, ldisp_fast, out-of-support as of 2014-07-01";
298 _model_string = z_name[2];
299 ambiguity++;
300 }
301 if (is_z900()) {
302 _features_string = "system-z, g1-z900, ldisp, out-of-support as of 2014-07-01";
303 _model_string = z_name[1];
304 ambiguity++;
305 }
306
307 if (ambiguity == 0) {
308 _features_string = "z/Architecture (unknown generation)";
309 } else if (ambiguity > 1) {
310 tty->print_cr("*** WARNING *** Ambiguous z/Architecture detection, ambiguity = %d", ambiguity);
311 tty->print_cr(" oldest detected generation is %s", _features_string);
312 _features_string = "z/Architecture (ambiguous detection)";
313 }
314
315 if (has_Crypto_AES()) {
316 char buf[256];
317 assert(strlen(_features_string) + 3*8 < sizeof(buf), "increase buffer size");
318 jio_snprintf(buf, sizeof(buf), "%s%s%s%s",
319 _features_string,
320 has_Crypto_AES128() ? ", aes128" : "",
321 has_Crypto_AES192() ? ", aes192" : "",
322 has_Crypto_AES256() ? ", aes256" : "");
323 _features_string = os::strdup(buf);
324 }
325
326 if (has_Crypto_SHA()) {
327 char buf[256];
328 assert(strlen(_features_string) + 6 + 2*8 + 7 < sizeof(buf), "increase buffer size");
329 jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s",
330 _features_string,
331 has_Crypto_SHA1() ? ", sha1" : "",
332 has_Crypto_SHA256() ? ", sha256" : "",
333 has_Crypto_SHA512() ? ", sha512" : "",
334 has_Crypto_GHASH() ? ", ghash" : "");
335 if (has_Crypto_AES()) { os::free((void *)_features_string); }
336 _features_string = os::strdup(buf);
337 }
338 }
339
340 // featureBuffer - bit array indicating availability of various features
341 // featureNum - bit index of feature to be tested
342 // Featurenum < 0 requests test for any nonzero bit in featureBuffer.
343 // bufLen - length of featureBuffer in bits
344 bool VM_Version::test_feature_bit(unsigned long* featureBuffer, int featureNum, unsigned int bufLen) {
345 assert(bufLen > 0, "buffer len must be positive");
346 assert((bufLen & 0x0007) == 0, "unaligned buffer len");
347 assert(((intptr_t)featureBuffer&0x0007) == 0, "unaligned feature buffer");
348 if (featureNum < 0) {
349 // Any bit set at all?
350 bool anyBit = false;
351 for (size_t i = 0; i < bufLen/(8*sizeof(long)); i++) {
352 anyBit = anyBit || (featureBuffer[i] != 0);
353 }
354 return anyBit;
355 } else {
356 assert((unsigned int)featureNum < bufLen, "feature index out of range");
357 unsigned char* byteBuffer = (unsigned char*)featureBuffer;
358 int byteIndex = featureNum/(8*sizeof(char));
359 int bitIndex = featureNum%(8*sizeof(char));
360 // Indexed bit set?
361 return (byteBuffer[byteIndex] & (1U<<(7-bitIndex))) != 0;
362 }
363 }
364
365 void VM_Version::print_features_internal(const char* text, bool print_anyway) {
366 tty->print_cr("%s %s", text, features_string());
367 tty->print("%s", text);
368 for (unsigned int i = 0; i < _nfeatures; i++) {
369 tty->print(" 0x%16.16lx", _features[i]);
370 }
371 tty->cr();
372
373 if (Verbose || print_anyway) {
374 // z900
375 if (has_long_displacement() ) tty->print_cr("available: %s", "LongDispFacility");
376 // z990
377 if (has_long_displacement_fast() ) tty->print_cr("available: %s", "LongDispFacilityHighPerf");
378 if (has_ETF2() && has_ETF3() ) tty->print_cr("available: %s", "ETF2 and ETF3");
379 if (has_Crypto() ) tty->print_cr("available: %s", "CryptoFacility");
380 // z9
381 if (has_extended_immediate() ) tty->print_cr("available: %s", "ExtImmedFacility");
382 if (has_StoreFacilityListExtended()) tty->print_cr("available: %s", "StoreFacilityListExtended");
383 if (has_StoreClockFast() ) tty->print_cr("available: %s", "StoreClockFast");
384 if (has_ETF2Enhancements() ) tty->print_cr("available: %s", "ETF2 Enhancements");
385 if (has_ETF3Enhancements() ) tty->print_cr("available: %s", "ETF3 Enhancements");
386 if (has_HFPUnnormalized() ) tty->print_cr("available: %s", "HFPUnnormalizedFacility");
387 if (has_HFPMultiplyAndAdd() ) tty->print_cr("available: %s", "HFPMultiplyAndAddFacility");
388 // z10
389 if (has_ParsingEnhancements() ) tty->print_cr("available: %s", "Parsing Enhancements");
390 if (has_ExtractCPUtime() ) tty->print_cr("available: %s", "ExtractCPUTime");
391 if (has_CompareSwapStore() ) tty->print_cr("available: %s", "CompareSwapStore");
392 if (has_GnrlInstrExtensions() ) tty->print_cr("available: %s", "General Instruction Extensions");
393 if (has_CompareBranch() ) tty->print_cr(" available: %s", "Compare and Branch");
394 if (has_CompareTrap() ) tty->print_cr(" available: %s", "Compare and Trap");
395 if (has_RelativeLoadStore() ) tty->print_cr(" available: %s", "Relative Load/Store");
396 if (has_MultiplySingleImm32() ) tty->print_cr(" available: %s", "MultiplySingleImm32");
397 if (has_Prefetch() ) tty->print_cr(" available: %s", "Prefetch");
398 if (has_MoveImmToMem() ) tty->print_cr(" available: %s", "Direct Moves Immediate to Memory");
399 if (has_MemWithImmALUOps() ) tty->print_cr(" available: %s", "Direct ALU Ops Memory .op. Immediate");
400 if (has_ExtractCPUAttributes() ) tty->print_cr(" available: %s", "Extract CPU Atributes");
401 if (has_ExecuteExtensions() ) tty->print_cr("available: %s", "ExecuteExtensions");
402 if (has_FPSupportEnhancements() ) tty->print_cr("available: %s", "FPSupportEnhancements");
403 if (has_DecimalFloatingPoint() ) tty->print_cr("available: %s", "DecimalFloatingPoint");
404 // z196
405 if (has_DistinctOpnds() ) tty->print_cr("available: %s", "Distinct Operands");
406 if (has_InterlockedAccessV1() ) tty->print_cr(" available: %s", "InterlockedAccess V1 (fast)");
407 if (has_PopCount() ) tty->print_cr(" available: %s", "PopCount");
408 if (has_LoadStoreConditional() ) tty->print_cr(" available: %s", "LoadStoreConditional");
409 if (has_HighWordInstr() ) tty->print_cr(" available: %s", "HighWord Instructions");
410 if (has_FastSync() ) tty->print_cr(" available: %s", "FastSync (bcr 14,0)");
411 if (has_AtomicMemWithImmALUOps() ) tty->print_cr("available: %s", "Atomic Direct ALU Ops Memory .op. Immediate");
412 if (has_FPExtensions() ) tty->print_cr("available: %s", "Floatingpoint Extensions");
413 if (has_CryptoExt3() ) tty->print_cr("available: %s", "Crypto Extensions 3");
414 if (has_CryptoExt4() ) tty->print_cr("available: %s", "Crypto Extensions 4");
415 // EC12
416 if (has_MiscInstrExt() ) tty->print_cr("available: %s", "Miscelaneous Instruction Extensions");
417 if (has_ExecutionHint() ) tty->print_cr(" available: %s", "Execution Hints (branch prediction)");
418 if (has_ProcessorAssist() ) tty->print_cr(" available: %s", "Processor Assists");
419 if (has_LoadAndTrap() ) tty->print_cr(" available: %s", "Load and Trap");
420 if (has_TxMem() ) tty->print_cr("available: %s", "Transactional Memory");
421 if (has_InterlockedAccessV2() ) tty->print_cr(" available: %s", "InterlockedAccess V2 (fast)");
422 if (has_DFPZonedConversion() ) tty->print_cr(" available: %s", "DFP Zoned Conversions");
423 // z13
424 if (has_LoadStoreConditional2() ) tty->print_cr("available: %s", "Load/Store Conditional 2");
425 if (has_CryptoExt5() ) tty->print_cr("available: %s", "Crypto Extensions 5");
426 if (has_DFPPackedConversion() ) tty->print_cr("available: %s", "DFP Packed Conversions");
427 if (has_VectorFacility() ) tty->print_cr("available: %s", "Vector Facility");
428 // test switches
429 if (has_TestFeature1Impl() ) tty->print_cr("available: %s", "TestFeature1Impl");
430 if (has_TestFeature2Impl() ) tty->print_cr("available: %s", "TestFeature2Impl");
431 if (has_TestFeature4Impl() ) tty->print_cr("available: %s", "TestFeature4Impl");
432 if (has_TestFeature8Impl() ) tty->print_cr("available: %s", "TestFeature8Impl");
433
434 if (has_Crypto()) {
435 tty->cr();
436 tty->print_cr("detailed availability of %s capabilities:", "CryptoFacility");
437 if (test_feature_bit(&_cipher_features[0], -1, 2*Cipher::_featureBits)) {
438 tty->cr();
439 tty->print_cr(" available: %s", "Message Cipher Functions");
440 }
441 if (test_feature_bit(&_cipher_features[0], -1, (int)Cipher::_featureBits)) {
442 tty->print_cr(" available Crypto Features of KM (Cipher Message):");
443 for (unsigned int i = 0; i < Cipher::_featureBits; i++) {
444 if (test_feature_bit(&_cipher_features[0], i, (int)Cipher::_featureBits)) {
445 switch (i) {
446 case Cipher::_Query: tty->print_cr(" available: KM Query"); break;
447 case Cipher::_DEA: tty->print_cr(" available: KM DEA"); break;
448 case Cipher::_TDEA128: tty->print_cr(" available: KM TDEA-128"); break;
449 case Cipher::_TDEA192: tty->print_cr(" available: KM TDEA-192"); break;
450 case Cipher::_EncryptedDEA: tty->print_cr(" available: KM Encrypted DEA"); break;
451 case Cipher::_EncryptedDEA128: tty->print_cr(" available: KM Encrypted DEA-128"); break;
452 case Cipher::_EncryptedDEA192: tty->print_cr(" available: KM Encrypted DEA-192"); break;
453 case Cipher::_AES128: tty->print_cr(" available: KM AES-128"); break;
454 case Cipher::_AES192: tty->print_cr(" available: KM AES-192"); break;
455 case Cipher::_AES256: tty->print_cr(" available: KM AES-256"); break;
456 case Cipher::_EnccryptedAES128: tty->print_cr(" available: KM Encrypted-AES-128"); break;
457 case Cipher::_EnccryptedAES192: tty->print_cr(" available: KM Encrypted-AES-192"); break;
458 case Cipher::_EnccryptedAES256: tty->print_cr(" available: KM Encrypted-AES-256"); break;
459 case Cipher::_XTSAES128: tty->print_cr(" available: KM XTS-AES-128"); break;
460 case Cipher::_XTSAES256: tty->print_cr(" available: KM XTS-AES-256"); break;
461 case Cipher::_EncryptedXTSAES128: tty->print_cr(" available: KM XTS-Encrypted-AES-128"); break;
462 case Cipher::_EncryptedXTSAES256: tty->print_cr(" available: KM XTS-Encrypted-AES-256"); break;
463 default: tty->print_cr(" available: unknown KM code %d", i); break;
464 }
465 }
466 }
467 }
468 if (test_feature_bit(&_cipher_features[2], -1, (int)Cipher::_featureBits)) {
469 tty->print_cr(" available Crypto Features of KMC (Cipher Message with Chaining):");
470 for (unsigned int i = 0; i < Cipher::_featureBits; i++) {
471 if (test_feature_bit(&_cipher_features[2], i, (int)Cipher::_featureBits)) {
472 switch (i) {
473 case Cipher::_Query: tty->print_cr(" available: KMC Query"); break;
474 case Cipher::_DEA: tty->print_cr(" available: KMC DEA"); break;
475 case Cipher::_TDEA128: tty->print_cr(" available: KMC TDEA-128"); break;
476 case Cipher::_TDEA192: tty->print_cr(" available: KMC TDEA-192"); break;
477 case Cipher::_EncryptedDEA: tty->print_cr(" available: KMC Encrypted DEA"); break;
478 case Cipher::_EncryptedDEA128: tty->print_cr(" available: KMC Encrypted DEA-128"); break;
479 case Cipher::_EncryptedDEA192: tty->print_cr(" available: KMC Encrypted DEA-192"); break;
480 case Cipher::_AES128: tty->print_cr(" available: KMC AES-128"); break;
481 case Cipher::_AES192: tty->print_cr(" available: KMC AES-192"); break;
482 case Cipher::_AES256: tty->print_cr(" available: KMC AES-256"); break;
483 case Cipher::_EnccryptedAES128: tty->print_cr(" available: KMC Encrypted-AES-128"); break;
484 case Cipher::_EnccryptedAES192: tty->print_cr(" available: KMC Encrypted-AES-192"); break;
485 case Cipher::_EnccryptedAES256: tty->print_cr(" available: KMC Encrypted-AES-256"); break;
486 case Cipher::_PRNG: tty->print_cr(" available: KMC PRNG"); break;
487 default: tty->print_cr(" available: unknown KMC code %d", i); break;
488 }
489 }
490 }
491 }
492
493 if (test_feature_bit(&_msgdigest_features[0], -1, 2*MsgDigest::_featureBits)) {
494 tty->cr();
495 tty->print_cr(" available: %s", "Message Digest Functions for SHA");
496 }
497 if (test_feature_bit(&_msgdigest_features[0], -1, (int)MsgDigest::_featureBits)) {
498 tty->print_cr(" available Features of KIMD (Msg Digest):");
499 for (unsigned int i = 0; i < MsgDigest::_featureBits; i++) {
500 if (test_feature_bit(&_msgdigest_features[0], i, (int)MsgDigest::_featureBits)) {
501 switch (i) {
502 case MsgDigest::_Query: tty->print_cr(" available: KIMD Query"); break;
503 case MsgDigest::_SHA1: tty->print_cr(" available: KIMD SHA-1"); break;
504 case MsgDigest::_SHA256: tty->print_cr(" available: KIMD SHA-256"); break;
505 case MsgDigest::_SHA512: tty->print_cr(" available: KIMD SHA-512"); break;
506 case MsgDigest::_GHASH: tty->print_cr(" available: KIMD GHASH"); break;
507 default: tty->print_cr(" available: unknown code %d", i); break;
508 }
509 }
510 }
511 }
512 if (test_feature_bit(&_msgdigest_features[2], -1, (int)MsgDigest::_featureBits)) {
513 tty->print_cr(" available Features of KLMD (Msg Digest):");
514 for (unsigned int i = 0; i < MsgDigest::_featureBits; i++) {
515 if (test_feature_bit(&_msgdigest_features[2], i, (int)MsgDigest::_featureBits)) {
516 switch (i) {
517 case MsgDigest::_Query: tty->print_cr(" available: KLMD Query"); break;
518 case MsgDigest::_SHA1: tty->print_cr(" available: KLMD SHA-1"); break;
519 case MsgDigest::_SHA256: tty->print_cr(" available: KLMD SHA-256"); break;
520 case MsgDigest::_SHA512: tty->print_cr(" available: KLMD SHA-512"); break;
521 default: tty->print_cr(" available: unknown code %d", i); break;
522 }
523 }
524 }
525 }
526 }
527 if (ContendedPaddingWidth > 0) {
528 tty->cr();
529 tty->print_cr("ContendedPaddingWidth " INTX_FORMAT, ContendedPaddingWidth);
530 }
531 }
532 }
533
534 void VM_Version::print_platform_virtualization_info(outputStream* st) {
535 // /proc/sysinfo contains interesting information about
536 // - LPAR
537 // - whole "Box" (CPUs )
538 // - z/VM / KVM (VM<nn>); this is not available in an LPAR-only setup
539 const char* kw[] = { "LPAR", "CPUs", "VM", NULL };
540 const char* info_file = "/proc/sysinfo";
541
542 if (!print_matching_lines_from_file(info_file, st, kw)) {
543 st->print_cr(" <%s Not Available>", info_file);
544 }
545 }
546
547 void VM_Version::print_features() {
548 print_features_internal("Version:");
549 }
550
551 void VM_Version::reset_features(bool reset) {
552 if (reset) {
553 for (unsigned int i = 0; i < _features_buffer_len; i++) {
554 VM_Version::_features[i] = 0;
555 }
556 }
557 }
558
559 void VM_Version::set_features_z900(bool reset) {
560 reset_features(reset);
561
562 set_has_long_displacement();
563 set_has_ETF2();
564 }
565
566 void VM_Version::set_features_z990(bool reset) {
567 reset_features(reset);
568
569 set_features_z900(false);
570 set_has_ETF3();
571 set_has_long_displacement_fast();
572 set_has_HFPMultiplyAndAdd();
573 }
574
575 void VM_Version::set_features_z9(bool reset) {
576 reset_features(reset);
577
578 set_features_z990(false);
579 set_has_StoreFacilityListExtended();
580 // set_has_Crypto(); // Do not set, crypto features must be retrieved separately.
581 set_has_ETF2Enhancements();
582 set_has_ETF3Enhancements();
583 set_has_extended_immediate();
584 set_has_StoreClockFast();
585 set_has_HFPUnnormalized();
586 }
587
588 void VM_Version::set_features_z10(bool reset) {
589 reset_features(reset);
590
591 set_features_z9(false);
592 set_has_CompareSwapStore();
593 set_has_RelativeLoadStore();
594 set_has_CompareBranch();
595 set_has_CompareTrap();
596 set_has_MultiplySingleImm32();
597 set_has_Prefetch();
598 set_has_MoveImmToMem();
599 set_has_MemWithImmALUOps();
600 set_has_ExecuteExtensions();
601 set_has_FPSupportEnhancements();
602 set_has_DecimalFloatingPoint();
603 set_has_ExtractCPUtime();
604 set_has_CryptoExt3();
605 }
606
607 void VM_Version::set_features_z196(bool reset) {
608 reset_features(reset);
609
610 set_features_z10(false);
611 set_has_InterlockedAccessV1();
612 set_has_PopCount();
613 set_has_LoadStoreConditional();
614 set_has_HighWordInstr();
615 set_has_FastSync();
616 set_has_FPExtensions();
617 set_has_DistinctOpnds();
618 set_has_CryptoExt4();
619 }
620
621 void VM_Version::set_features_ec12(bool reset) {
622 reset_features(reset);
623
624 set_features_z196(false);
625 set_has_MiscInstrExt();
626 set_has_InterlockedAccessV2();
627 set_has_LoadAndALUAtomicV2();
628 set_has_TxMem();
629 }
630
631 void VM_Version::set_features_z13(bool reset) {
632 reset_features(reset);
633
634 set_features_ec12(false);
635 set_has_LoadStoreConditional2();
636 set_has_CryptoExt5();
637 set_has_VectorFacility();
638 }
639
640 void VM_Version::set_features_from(const char* march) {
641 bool err = false;
642 bool prt = false;
643
644 if ((march != NULL) && (march[0] != '\0')) {
645 const int buf_len = 16;
646 const int hdr_len = 5;
647 char buf[buf_len];
648 if (strlen(march) >= hdr_len) {
649 memcpy(buf, march, hdr_len);
650 buf[hdr_len] = '\00';
651 } else {
652 buf[0] = '\00';
653 }
654
655 if (!strcmp(march, "z900")) {
656 set_features_z900();
657 } else if (!strcmp(march, "z990")) {
658 set_features_z990();
659 } else if (!strcmp(march, "z9")) {
660 set_features_z9();
661 } else if (!strcmp(march, "z10")) {
662 set_features_z10();
663 } else if (!strcmp(march, "z196")) {
664 set_features_z196();
665 } else if (!strcmp(march, "ec12")) {
666 set_features_ec12();
667 } else if (!strcmp(march, "z13")) {
668 set_features_z13();
669 } else if (!strcmp(buf, "ztest")) {
670 assert(!has_TestFeaturesImpl(), "possible facility list flag conflict");
671 if (strlen(march) > hdr_len) {
672 int itest = 0;
673 if ((strlen(march)-hdr_len) >= buf_len) err = true;
674 if (!err) {
675 memcpy(buf, &march[hdr_len], strlen(march)-hdr_len);
676 buf[strlen(march)-hdr_len] = '\00';
677 for (size_t i = 0; !err && (i < strlen(buf)); i++) {
678 itest = itest*10 + buf[i]-'0';
679 err = err || ((buf[i]-'0') < 0) || ((buf[i]-'0') > 9) || (itest > 15);
680 }
681 }
682 if (!err) {
683 prt = true;
684 if (itest & 0x01) { set_has_TestFeature1Impl(); }
685 if (itest & 0x02) { set_has_TestFeature2Impl(); }
686 if (itest & 0x04) { set_has_TestFeature4Impl(); }
687 if (itest & 0x08) { set_has_TestFeature8Impl(); }
688 }
689 } else {
690 prt = true;
691 set_has_TestFeature1Impl();
692 set_has_TestFeature2Impl();
693 set_has_TestFeature4Impl();
694 set_has_TestFeature8Impl();
695 }
696 } else {
697 err = true;
698 }
699 if (!err) {
700 set_features_string();
701 if (prt || PrintAssembly) {
702 print_features_internal("CPU Version as set by cmdline option:", prt);
703 }
704 } else {
705 tty->print_cr("***Warning: Unsupported ProcessorArchitecture: %s, internal settings left undisturbed.", march);
706 }
707 }
708
709 }
710
711 static long (*getFeatures)(unsigned long*, int, int) = NULL;
712
713 void VM_Version::set_getFeatures(address entryPoint) {
714 if (getFeatures == NULL) {
715 getFeatures = (long(*)(unsigned long*, int, int))entryPoint;
716 }
717 }
718
719 long VM_Version::call_getFeatures(unsigned long* buffer, int buflen, int functionCode) {
720 VM_Version::_is_determine_features_test_running = true;
721 long functionResult = (*getFeatures)(buffer, buflen, functionCode);
722 VM_Version::_is_determine_features_test_running = false;
723 return functionResult;
724 }
725
726 // Helper function for "extract cache attribute" instruction.
727 int VM_Version::calculate_ECAG_functionCode(unsigned int attributeIndication,
728 unsigned int levelIndication,
729 unsigned int typeIndication) {
730 return (attributeIndication<<4) | (levelIndication<<1) | typeIndication;
731 }
732
733 void VM_Version::determine_features() {
734
735 const int cbuf_size = _code_buffer_len;
736 const int buf_len = _features_buffer_len;
737
738 // Allocate code buffer space for the detection code.
739 ResourceMark rm;
740 CodeBuffer cbuf("determine CPU features", cbuf_size, 0);
741 MacroAssembler* a = new MacroAssembler(&cbuf);
742
743 // Emit code.
744 set_getFeatures(a->pc());
745 address code = a->pc();
746
747 // Try STFLE. Possible INVOP will cause defaults to be used.
748 Label getFEATURES;
749 Label getCPUFEATURES; // fcode = -1 (cache)
750 Label getCIPHERFEATURES; // fcode = -2 (cipher)
751 Label getMSGDIGESTFEATURES; // fcode = -3 (SHA)
752 Label getVECTORFEATURES; // fcode = -4 (OS support for vector instructions)
753 Label errRTN;
754 a->z_ltgfr(Z_R0, Z_ARG2); // Buf len to r0 and test.
755 a->z_brl(getFEATURES); // negative -> Get machine features not covered by facility list.
756 a->z_lghi(Z_R1,0);
757 a->z_brz(errRTN); // zero -> Function code currently not used, indicate "aborted".
758
759 a->z_aghi(Z_R0, -1);
760 a->z_stfle(0, Z_ARG1);
761 a->z_lg(Z_R1, 0, Z_ARG1); // Get first DW of facility list.
762 a->z_lgr(Z_RET, Z_R0); // Calculate rtn value for success.
763 a->z_la(Z_RET, 1, Z_RET);
764 a->z_brnz(errRTN); // Instr failed if non-zero CC.
765 a->z_ltgr(Z_R1, Z_R1); // Instr failed if first DW == 0.
766 a->z_bcr(Assembler::bcondNotZero, Z_R14); // Successful return.
767
768 a->bind(errRTN);
769 a->z_lngr(Z_RET, Z_RET);
770 a->z_ltgr(Z_R1, Z_R1);
771 a->z_bcr(Assembler::bcondNotZero, Z_R14); // Return "buffer too small".
772 a->z_xgr(Z_RET, Z_RET);
773 a->z_br(Z_R14); // Return "operation aborted".
774
775 a->bind(getFEATURES);
776 a->z_cghi(Z_R0, -1); // -1: Extract CPU attributes, currently: cache layout only.
777 a->z_bre(getCPUFEATURES);
778 a->z_cghi(Z_R0, -2); // -2: Extract detailed crypto capabilities (cipher instructions).
779 a->z_bre(getCIPHERFEATURES);
780 a->z_cghi(Z_R0, -3); // -3: Extract detailed crypto capabilities (msg digest instructions).
781 a->z_bre(getMSGDIGESTFEATURES);
782 a->z_cghi(Z_R0, -4); // -4: Verify vector instruction availability (OS support).
783 a->z_bre(getVECTORFEATURES);
784
785 a->z_xgr(Z_RET, Z_RET); // Not a valid function code.
786 a->z_br(Z_R14); // Return "operation aborted".
787
788 // Try KIMD/KLMD query function to get details about msg digest (secure hash, SHA) instructions.
789 a->bind(getMSGDIGESTFEATURES);
790 a->z_lghi(Z_R0,(int)MsgDigest::_Query); // query function code
791 a->z_lgr(Z_R1,Z_R2); // param block addr, 2*16 bytes min size
792 a->z_kimd(Z_R2,Z_R2); // Get available KIMD functions (bit pattern in param blk).
793 a->z_la(Z_R1,16,Z_R1); // next param block addr
794 a->z_klmd(Z_R2,Z_R2); // Get available KLMD functions (bit pattern in param blk).
795 a->z_lghi(Z_RET,4);
796 a->z_br(Z_R14);
797
798 // Try KM/KMC query function to get details about crypto instructions.
799 a->bind(getCIPHERFEATURES);
800 a->z_lghi(Z_R0,(int)Cipher::_Query); // query function code
801 a->z_lgr(Z_R1,Z_R2); // param block addr, 2*16 bytes min size (KIMD/KLMD output)
802 a->z_km(Z_R2,Z_R2); // get available KM functions
803 a->z_la(Z_R1,16,Z_R1); // next param block addr
804 a->z_kmc(Z_R2,Z_R2); // get available KMC functions
805 a->z_lghi(Z_RET,4);
806 a->z_br(Z_R14);
807
808 // Use EXTRACT CPU ATTRIBUTE instruction to get information about cache layout.
809 a->bind(getCPUFEATURES);
810 a->z_xgr(Z_R0,Z_R0); // as recommended in instruction documentation
811 a->z_ecag(Z_RET,Z_R0,0,Z_ARG3); // Extract information as requested by Z_ARG1 contents.
812 a->z_br(Z_R14);
813
814 // Use a vector instruction to verify OS support. Will fail with SIGFPE if OS support is missing.
815 a->bind(getVECTORFEATURES);
816 a->z_vtm(Z_V0,Z_V0); // non-destructive vector instruction. Will cause SIGFPE if not supported.
817 a->z_br(Z_R14);
818
819 address code_end = a->pc();
820 a->flush();
821
822 cbuf.insts()->set_end(code_end);
823
824 // Print the detection code.
825 bool printVerbose = Verbose || PrintAssembly || PrintStubCode;
826 if (printVerbose) {
827 ttyLocker ttyl;
828 tty->print_cr("Decoding CPU feature detection stub at " INTPTR_FORMAT " before execution:", p2i(code));
829 tty->print_cr("Stub length is %ld bytes, codebuffer reserves %d bytes, %ld bytes spare.",
830 code_end-code, cbuf_size, cbuf_size-(code_end-code));
831
832 // Use existing decode function. This enables the [MachCode] format which is needed to DecodeErrorFile.
833 Disassembler::decode(&cbuf, code, code_end, tty);
834 }
835
836 // Prepare for detection code execution and clear work buffer.
837 _nfeatures = 0;
838 _ncipher_features = 0;
839 unsigned long buffer[buf_len];
840
841 for (int i = 0; i < buf_len; i++) {
842 buffer[i] = 0L;
843 }
844
845 // execute code
846 // Illegal instructions will be replaced by 0 in signal handler.
847 // In case of problems, call_getFeatures will return a not-positive result.
848 long used_len = call_getFeatures(buffer, buf_len, 0);
849
850 bool ok;
851 if (used_len == 1) {
852 ok = true;
853 } else if (used_len > 1) {
854 unsigned int used_lenU = (unsigned int)used_len;
855 ok = true;
856 for (unsigned int i = 1; i < used_lenU; i++) {
857 ok = ok && (buffer[i] == 0L);
858 }
859 if (printVerbose && !ok) {
860 bool compact = false;
861 tty->print_cr("Note: feature list has %d (i.e. more than one) array elements.", used_lenU);
862 if (compact) {
863 tty->print("non-zero feature list elements:");
864 for (unsigned int i = 0; i < used_lenU; i++) {
865 tty->print(" [%d]: 0x%16.16lx", i, buffer[i]);
866 }
867 tty->cr();
868 } else {
869 for (unsigned int i = 0; i < used_lenU; i++) {
870 tty->print_cr("non-zero feature list[%d]: 0x%16.16lx", i, buffer[i]);
871 }
872 }
873
874 if (compact) {
875 tty->print_cr("Active features (compact view):");
876 for (unsigned int k = 0; k < used_lenU; k++) {
877 tty->print_cr(" buffer[%d]:", k);
878 for (unsigned int j = k*sizeof(long); j < (k+1)*sizeof(long); j++) {
879 bool line = false;
880 for (unsigned int i = j*8; i < (j+1)*8; i++) {
881 bool bit = test_feature_bit(buffer, i, used_lenU*sizeof(long)*8);
882 if (bit) {
883 if (!line) {
884 tty->print(" byte[%d]:", j);
885 line = true;
886 }
887 tty->print(" [%3.3d]", i);
888 }
889 }
890 if (line) {
891 tty->cr();
892 }
893 }
894 }
895 } else {
896 tty->print_cr("Active features (full view):");
897 for (unsigned int k = 0; k < used_lenU; k++) {
898 tty->print_cr(" buffer[%d]:", k);
899 for (unsigned int j = k*sizeof(long); j < (k+1)*sizeof(long); j++) {
900 tty->print(" byte[%d]:", j);
901 for (unsigned int i = j*8; i < (j+1)*8; i++) {
902 bool bit = test_feature_bit(buffer, i, used_lenU*sizeof(long)*8);
903 if (bit) {
904 tty->print(" [%3.3d]", i);
905 } else {
906 tty->print(" ");
907 }
908 }
909 tty->cr();
910 }
911 }
912 }
913 }
914 ok = true;
915 } else { // No features retrieved if we reach here. Buffer too short or instr not available.
916 if (used_len < 0) {
917 ok = false;
918 if (printVerbose) {
919 tty->print_cr("feature list buffer[%d] too short, required: buffer[%ld]", buf_len, -used_len);
920 }
921 } else {
922 if (printVerbose) {
923 tty->print_cr("feature list could not be retrieved. Running on z900 or z990? Trying to find out...");
924 }
925 used_len = call_getFeatures(buffer, 0, 0); // Must provide at least two DW buffer elements!!!!
926
927 ok = used_len > 0;
928 if (ok) {
929 if (buffer[1]*10 < buffer[0]) {
930 set_features_z900();
931 } else {
932 set_features_z990();
933 }
934
935 if (printVerbose) {
936 tty->print_cr("Note: high-speed long displacement test used %ld iterations.", used_len);
937 tty->print_cr(" Positive displacement loads took %8.8lu microseconds.", buffer[1]);
938 tty->print_cr(" Negative displacement loads took %8.8lu microseconds.", buffer[0]);
939 if (has_long_displacement_fast()) {
940 tty->print_cr(" assuming high-speed long displacement IS available.");
941 } else {
942 tty->print_cr(" assuming high-speed long displacement is NOT available.");
943 }
944 }
945 } else {
946 if (printVerbose) {
947 tty->print_cr("Note: high-speed long displacement test was not successful.");
948 tty->print_cr(" assuming long displacement is NOT available.");
949 }
950 }
951 return; // Do not copy buffer to _features, no test for cipher features.
952 }
953 }
954
955 if (ok) {
956 // Fill features buffer.
957 // Clear work buffer.
958 for (int i = 0; i < buf_len; i++) {
959 _features[i] = buffer[i];
960 _cipher_features[i] = 0;
961 _msgdigest_features[i] = 0;
962 buffer[i] = 0L;
963 }
964 _nfeatures = used_len;
965 } else {
966 for (int i = 0; i < buf_len; i++) {
967 _features[i] = 0;
968 _cipher_features[i] = 0;
969 _msgdigest_features[i] = 0;
970 buffer[i] = 0L;
971 }
972 _nfeatures = 0;
973 }
974
975 if (has_VectorFacility()) {
976 // Verify that feature can actually be used. OS support required.
977 call_getFeatures(buffer, -4, 0);
978 if (printVerbose) {
979 ttyLocker ttyl;
980 if (has_VectorFacility()) {
981 tty->print_cr(" Vector Facility has been verified to be supported by OS");
982 } else {
983 tty->print_cr(" Vector Facility has been disabled - not supported by OS");
984 }
985 }
986 }
987
988 // Extract Crypto Facility details.
989 if (has_Crypto()) {
990 // Get cipher features.
991 used_len = call_getFeatures(buffer, -2, 0);
992 for (int i = 0; i < buf_len; i++) {
993 _cipher_features[i] = buffer[i];
994 }
995 _ncipher_features = used_len;
996
997 // Get msg digest features.
998 used_len = call_getFeatures(buffer, -3, 0);
999 for (int i = 0; i < buf_len; i++) {
1000 _msgdigest_features[i] = buffer[i];
1001 }
1002 _nmsgdigest_features = used_len;
1003 }
1004
1005 static int levelProperties[_max_cache_levels]; // All property indications per level.
1006 static int levelScope[_max_cache_levels]; // private/shared
1007 static const char* levelScopeText[4] = {"No cache ",
1008 "CPU private",
1009 "shared ",
1010 "reserved "};
1011
1012 static int levelType[_max_cache_levels]; // D/I/mixed
1013 static const char* levelTypeText[4] = {"separate D and I caches",
1014 "I cache only ",
1015 "D-cache only ",
1016 "combined D/I cache "};
1017
1018 static unsigned int levelReserved[_max_cache_levels]; // reserved property bits
1019 static unsigned int levelLineSize[_max_cache_levels];
1020 static unsigned int levelTotalSize[_max_cache_levels];
1021 static unsigned int levelAssociativity[_max_cache_levels];
1022
1023
1024 // Extract Cache Layout details.
1025 if (has_ExtractCPUAttributes() && printVerbose) { // For information only, as of now.
1026 bool lineSize_mismatch;
1027 bool print_something;
1028 long functionResult;
1029 unsigned int attributeIndication = 0; // 0..15
1030 unsigned int levelIndication = 0; // 0..8
1031 unsigned int typeIndication = 0; // 0..1 (D-Cache, I-Cache)
1032 int functionCode = calculate_ECAG_functionCode(attributeIndication, levelIndication, typeIndication);
1033
1034 // Get cache topology.
1035 functionResult = call_getFeatures(buffer, -1, functionCode);
1036
1037 for (unsigned int i = 0; i < _max_cache_levels; i++) {
1038 if (functionResult > 0) {
1039 int shiftVal = 8*(_max_cache_levels-(i+1));
1040 levelProperties[i] = (functionResult & (0xffUL<<shiftVal)) >> shiftVal;
1041 levelReserved[i] = (levelProperties[i] & 0xf0) >> 4;
1042 levelScope[i] = (levelProperties[i] & 0x0c) >> 2;
1043 levelType[i] = (levelProperties[i] & 0x03);
1044 } else {
1045 levelProperties[i] = 0;
1046 levelReserved[i] = 0;
1047 levelScope[i] = 0;
1048 levelType[i] = 0;
1049 }
1050 levelLineSize[i] = 0;
1051 levelTotalSize[i] = 0;
1052 levelAssociativity[i] = 0;
1053 }
1054
1055 tty->cr();
1056 tty->print_cr("------------------------------------");
1057 tty->print_cr("--- Cache Topology Information ---");
1058 tty->print_cr("------------------------------------");
1059 for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1060 tty->print_cr(" Cache Level %d: <scope> %s | <type> %s",
1061 i+1, levelScopeText[levelScope[i]], levelTypeText[levelType[i]]);
1062 }
1063
1064 // Get D-cache details per level.
1065 _Dcache_lineSize = 0;
1066 lineSize_mismatch = false;
1067 print_something = false;
1068 typeIndication = 0; // 0..1 (D-Cache, I-Cache)
1069 for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1070 if ((levelType[i] == 0) || (levelType[i] == 2)) {
1071 print_something = true;
1072
1073 // Get cache line size of level i.
1074 attributeIndication = 1;
1075 functionCode = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1076 levelLineSize[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1077
1078 // Get cache total size of level i.
1079 attributeIndication = 2;
1080 functionCode = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1081 levelTotalSize[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1082
1083 // Get cache associativity of level i.
1084 attributeIndication = 3;
1085 functionCode = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1086 levelAssociativity[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1087
1088 _Dcache_lineSize = _Dcache_lineSize == 0 ? levelLineSize[i] : _Dcache_lineSize;
1089 lineSize_mismatch = lineSize_mismatch || (_Dcache_lineSize != levelLineSize[i]);
1090 } else {
1091 levelLineSize[i] = 0;
1092 }
1093 }
1094
1095 if (print_something) {
1096 tty->cr();
1097 tty->print_cr("------------------------------------");
1098 tty->print_cr("--- D-Cache Detail Information ---");
1099 tty->print_cr("------------------------------------");
1100 if (lineSize_mismatch) {
1101 tty->print_cr("WARNING: D-Cache line size mismatch!");
1102 }
1103 for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1104 if (levelLineSize[i] > 0) {
1105 tty->print_cr(" D-Cache Level %d: line size = %4d, total size = %6dKB, associativity = %2d",
1106 i+1, levelLineSize[i], levelTotalSize[i]/(int)K, levelAssociativity[i]);
1107 }
1108 }
1109 }
1110
1111 // Get I-cache details per level.
1112 _Icache_lineSize = 0;
1113 lineSize_mismatch = false;
1114 print_something = false;
1115 typeIndication = 1; // 0..1 (D-Cache, I-Cache)
1116 for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1117 if ((levelType[i] == 0) || (levelType[i] == 1)) {
1118 print_something = true;
1119
1120 // Get cache line size of level i.
1121 attributeIndication = 1;
1122 functionCode = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1123 levelLineSize[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1124
1125 // Get cache total size of level i.
1126 attributeIndication = 2;
1127 functionCode = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1128 levelTotalSize[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1129
1130 // Get cache associativity of level i.
1131 attributeIndication = 3;
1132 functionCode = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1133 levelAssociativity[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1134
1135 _Icache_lineSize = _Icache_lineSize == 0 ? levelLineSize[i] : _Icache_lineSize;
1136 lineSize_mismatch = lineSize_mismatch || (_Icache_lineSize != levelLineSize[i]);
1137 } else {
1138 levelLineSize[i] = 0;
1139 }
1140 }
1141
1142 if (print_something) {
1143 tty->cr();
1144 tty->print_cr("------------------------------------");
1145 tty->print_cr("--- I-Cache Detail Information ---");
1146 tty->print_cr("------------------------------------");
1147 if (lineSize_mismatch) {
1148 tty->print_cr("WARNING: I-Cache line size mismatch!");
1149 }
1150 for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1151 if (levelLineSize[i] > 0) {
1152 tty->print_cr(" I-Cache Level %d: line size = %4d, total size = %6dKB, associativity = %2d",
1153 i+1, levelLineSize[i], levelTotalSize[i]/(int)K, levelAssociativity[i]);
1154 }
1155 }
1156 }
1157
1158 // Get D/I-cache details per level.
1159 lineSize_mismatch = false;
1160 print_something = false;
1161 typeIndication = 0; // 0..1 (D-Cache, I-Cache)
1162 for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1163 if (levelType[i] == 3) {
1164 print_something = true;
1165
1166 // Get cache line size of level i.
1167 attributeIndication = 1;
1168 functionCode = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1169 levelLineSize[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1170
1171 // Get cache total size of level i.
1172 attributeIndication = 2;
1173 functionCode = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1174 levelTotalSize[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1175
1176 // Get cache associativity of level i.
1177 attributeIndication = 3;
1178 functionCode = calculate_ECAG_functionCode(attributeIndication, i, typeIndication);
1179 levelAssociativity[i] = (unsigned int)call_getFeatures(buffer, -1, functionCode);
1180
1181 _Dcache_lineSize = _Dcache_lineSize == 0 ? levelLineSize[i] : _Dcache_lineSize;
1182 _Icache_lineSize = _Icache_lineSize == 0 ? levelLineSize[i] : _Icache_lineSize;
1183 lineSize_mismatch = lineSize_mismatch || (_Dcache_lineSize != levelLineSize[i])
1184 || (_Icache_lineSize != levelLineSize[i]);
1185 } else {
1186 levelLineSize[i] = 0;
1187 }
1188 }
1189
1190 if (print_something) {
1191 tty->cr();
1192 tty->print_cr("--------------------------------------");
1193 tty->print_cr("--- D/I-Cache Detail Information ---");
1194 tty->print_cr("--------------------------------------");
1195 if (lineSize_mismatch) {
1196 tty->print_cr("WARNING: D/I-Cache line size mismatch!");
1197 }
1198 for (unsigned int i = 0; (i < _max_cache_levels) && (levelProperties[i] != 0); i++) {
1199 if (levelLineSize[i] > 0) {
1200 tty->print_cr(" D/I-Cache Level %d: line size = %4d, total size = %6dKB, associativity = %2d",
1201 i+1, levelLineSize[i], levelTotalSize[i]/(int)K, levelAssociativity[i]);
1202 }
1203 }
1204 }
1205 tty->cr();
1206 }
1207 return;
1208 }
1209
1210 unsigned long VM_Version::z_SIGILL() {
1211 unsigned long ZeroBuffer = 0;
1212 unsigned long work;
1213 asm(
1214 " LA %[work],%[buffer] \n\t" // Load address of buffer.
1215 " LARL 14,+6 \n\t" // Load address of faulting instruction.
1216 " BCR 15,%[work] \n\t" // Branch into buffer, execute whatever is in there.
1217 : [buffer] "+Q" (ZeroBuffer) /* outputs */
1218 , [work] "=&a" (work) /* outputs */
1219 : /* inputs */
1220 : "cc" /* clobbered */
1221 );
1222 return ZeroBuffer;
1223 }
1224
1225 unsigned long VM_Version::z_SIGSEGV() {
1226 unsigned long ZeroBuffer = 0;
1227 unsigned long work;
1228 asm(
1229 " LG %[work],%[buffer] \n\t" // Load zero address.
1230 " STG %[work],0(,%[work])\n\t" // Store to address zero.
1231 : [buffer] "+Q" (ZeroBuffer) /* outputs */
1232 , [work] "=&a" (work) /* outputs */
1233 : /* inputs */
1234 : "cc" /* clobbered */
1235 );
1236 return ZeroBuffer;
1237 }
1238